August 2017: Looking Back at Harvey 5 Year Later
Always keep an eye on an MVC in 2.0+ inch PW air mass with light winds aloft. Lack of good low level inflow may keep things from organizing much...although coastal outflow boundary from earlier is starting to wash out and return of southerly 10-15kt inflow is likely around midnight over the area. HRRR from earlier was hinting at convergent zone along US 59 on SE flank of MVC circulation and returning juicy air mass from the south.
Yes indeed. It's been a bit of a ride. Another 1 inch of rain IMBY. So nice to turn the sprinklers OFF.TexasBreeze wrote:Looks like showers popping around the remnant vortex currently around College/Bryan area...
The vortex is swirling down toward Houston.
Last edited by DoctorMu on Mon Aug 07, 2017 11:21 pm, edited 1 time in total.
I have been trying (and failing) to see if the MCV is moving or just sitting stationary over college stattion. Anyone have a better idea if it is moving?
-
TexasBreeze
- Posts: 942
- Joined: Sun Sep 26, 2010 4:46 pm
- Location: NW Houston, TX
- Contact:
It is stationary it appears and getting more organized training storms around it.
-
srainhoutx
- Site Admin
- Posts: 19616
- Joined: Tue Feb 02, 2010 2:32 pm
- Location: Maggie Valley, NC
- Contact:
Heavy rainfall Update from Jeff:
NWS has issued an Urban Flood Advisory for NW Harris County, Waller County, and SW Montgomery County until 130am.
Training band of heavy rainfall is developing from near Magnolia to just north of Sealy. While cell motions have been quick, training of the rainfall is yielding nearly .75 to 1.0 of an inch in 30 minutes over NW Harris and portions of Waller County as recorded by HCFCD gages near Waller recently.
Influx of deep tropical moisture and unstable air mass spreading inland over the coastal counties will eventually collide with this increasing line at some point around midnight. Hourly rainfall rates may increase into the 2-3 inch range with isolated storm totals potential pushing 4-5 inches in a couple of hours. Thus far rainfall rates have been manageable, but trends point to more sustained and organized banding features overnight which may yield high rates and approach/exceed flash flood guidance over portions of the area resulting in rapid rises on area watersheds.
Amounts greater than 3.0 inches in an hour or two across NW Harris County would be of concern given already saturated conditions.
NWS has issued an Urban Flood Advisory for NW Harris County, Waller County, and SW Montgomery County until 130am.
Training band of heavy rainfall is developing from near Magnolia to just north of Sealy. While cell motions have been quick, training of the rainfall is yielding nearly .75 to 1.0 of an inch in 30 minutes over NW Harris and portions of Waller County as recorded by HCFCD gages near Waller recently.
Influx of deep tropical moisture and unstable air mass spreading inland over the coastal counties will eventually collide with this increasing line at some point around midnight. Hourly rainfall rates may increase into the 2-3 inch range with isolated storm totals potential pushing 4-5 inches in a couple of hours. Thus far rainfall rates have been manageable, but trends point to more sustained and organized banding features overnight which may yield high rates and approach/exceed flash flood guidance over portions of the area resulting in rapid rises on area watersheds.
Amounts greater than 3.0 inches in an hour or two across NW Harris County would be of concern given already saturated conditions.
Carla/Alicia/Jerry(In The Eye)/Michelle/Charley/Ivan/Dennis/Katrina/Rita/Wilma/Humberto/Ike/Harvey
Member: National Weather Association
Facebook.com/Weather Infinity
Twitter @WeatherInfinity
Member: National Weather Association
Facebook.com/Weather Infinity
Twitter @WeatherInfinity
Looks like heavy rain is moving in. Be safe everyone.
HRRR runs concern me. However, I do think the worst should be out of the metro by morning commute time, so hopefully that gives any street flooding time to drain.
Pro tip: If water gets into your tailpipe and into the engine, your car will break and will be impossible to fix. Think about that next time you drive into flood waters!
Pro tip: If water gets into your tailpipe and into the engine, your car will break and will be impossible to fix. Think about that next time you drive into flood waters!
A transplant from Houston to Lincoln, Nebraska.
Flood Advisory
National Weather Service Houston/Galveston TX
1138 PM CDT MON AUG 7 2017
TXC157-201-339-473-080730-
/O.NEW.KHGX.FA.Y.0205.170808T0438Z-170808T0730Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TX-Fort Bend TX-Waller TX-Harris TX-
1138 PM CDT MON AUG 7 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
South central Montgomery County in southeastern Texas...
Northwestern Fort Bend County in southeastern Texas...
Southeastern Waller County in southeastern Texas...
Northwestern Harris County in southeastern Texas...
* Until 230 AM CDT.
* At 1135 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. This can cause minor flooding in
the advisory area. A gauge at Katy has reported two inches of rain
in the past hour, and an inch in the past 15 minutes. Other
locations in Harris County have reported in excess of an inch of
rain in the past hour.
* Some locations that will experience heavy rain include...
Katy, Tomball, Jersey Village, Brookshire, The Woodlands, western
Addicks Park Ten, Oak Ridge North, Fulshear, Pattison, The
Woodlands Pavillion, Hooks Airport, Cinco Ranch, Willowbrook,
Cypress and northern Weston Lakes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
National Weather Service Houston/Galveston TX
1138 PM CDT MON AUG 7 2017
TXC157-201-339-473-080730-
/O.NEW.KHGX.FA.Y.0205.170808T0438Z-170808T0730Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TX-Fort Bend TX-Waller TX-Harris TX-
1138 PM CDT MON AUG 7 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
South central Montgomery County in southeastern Texas...
Northwestern Fort Bend County in southeastern Texas...
Southeastern Waller County in southeastern Texas...
Northwestern Harris County in southeastern Texas...
* Until 230 AM CDT.
* At 1135 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. This can cause minor flooding in
the advisory area. A gauge at Katy has reported two inches of rain
in the past hour, and an inch in the past 15 minutes. Other
locations in Harris County have reported in excess of an inch of
rain in the past hour.
* Some locations that will experience heavy rain include...
Katy, Tomball, Jersey Village, Brookshire, The Woodlands, western
Addicks Park Ten, Oak Ridge North, Fulshear, Pattison, The
Woodlands Pavillion, Hooks Airport, Cinco Ranch, Willowbrook,
Cypress and northern Weston Lakes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
-
srainhoutx
- Site Admin
- Posts: 19616
- Joined: Tue Feb 02, 2010 2:32 pm
- Location: Maggie Valley, NC
- Contact:
Urban Flood Advisory Update from Jeff:
Urban Flood Advisory issued for portions of Fort Bend, western Harris, Waller, and southern Montgomery Counties until 230am.
Band of heavy rainfall producing rainfall rates of 1-2 inches an hour extends from Conroe to Tomball to Katy moving ENE at 20mph while cells along the line move NNE at 20-25mph. Fast forward motions have kept rainfall totals thus far in the 1-2 inch range over a 1-2 hour period which can be handled. Brief periods of cell training has resulted in a quick 1-1.5 inches in 30 minutes or less under the most intense cells. Recent cells over Katy have produce 1 inch of rainfall in 15 minutes.
Overall cell motions should limit rainfall amounts to 1-3 inches over the next several hours. Will have to watch influx of deep moisture now approaching US 59 for more enhanced cell mergers and potential for backbuilding of the main band across portions of Fort Bend and Austin Counties which could result in a period of cell training.
Position of mid level low pressure center just north of Brenham continues to favor the SE flank of the circulation for the heavy rainfall production which is generally along or about 30 miles either side of US 59 currently.
Urban Flood Advisory issued for portions of Fort Bend, western Harris, Waller, and southern Montgomery Counties until 230am.
Band of heavy rainfall producing rainfall rates of 1-2 inches an hour extends from Conroe to Tomball to Katy moving ENE at 20mph while cells along the line move NNE at 20-25mph. Fast forward motions have kept rainfall totals thus far in the 1-2 inch range over a 1-2 hour period which can be handled. Brief periods of cell training has resulted in a quick 1-1.5 inches in 30 minutes or less under the most intense cells. Recent cells over Katy have produce 1 inch of rainfall in 15 minutes.
Overall cell motions should limit rainfall amounts to 1-3 inches over the next several hours. Will have to watch influx of deep moisture now approaching US 59 for more enhanced cell mergers and potential for backbuilding of the main band across portions of Fort Bend and Austin Counties which could result in a period of cell training.
Position of mid level low pressure center just north of Brenham continues to favor the SE flank of the circulation for the heavy rainfall production which is generally along or about 30 miles either side of US 59 currently.
Carla/Alicia/Jerry(In The Eye)/Michelle/Charley/Ivan/Dennis/Katrina/Rita/Wilma/Humberto/Ike/Harvey
Member: National Weather Association
Facebook.com/Weather Infinity
Twitter @WeatherInfinity
Member: National Weather Association
Facebook.com/Weather Infinity
Twitter @WeatherInfinity
Flood Advisory
National Weather Service Houston/Galveston TX
1218 AM CDT TUE AUG 8 2017
TXC157-201-339-080815-
/O.NEW.KHGX.FA.Y.0206.170808T0518Z-170808T0815Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TX-Fort Bend TX-Harris TX-
1218 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Southeastern Montgomery County in southeastern Texas...
North central Fort Bend County in southeastern Texas...
Central Harris County in southeastern Texas...
* Until 315 AM CDT.
* At 1218 AM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. This will cause minor flooding in
the advisory area. Up to two inches of rain have already fallen.
* Some locations that will experience flooding include...
Northeastern Sugar Land, Bellaire, Humble, West University Place,
Jacinto City, Jersey Village, Hunters Creek Village, Bunker Hill
Village, Piney Point Village, Downtown Houston, Greenway / Upper
Kirby Area, Kingwood, Spring Branch North, Second Ward, Greater
Greenspoint, Spring, Greater Heights, Mission Bend, Neartown /
Montrose and Memorial Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
National Weather Service Houston/Galveston TX
1218 AM CDT TUE AUG 8 2017
TXC157-201-339-080815-
/O.NEW.KHGX.FA.Y.0206.170808T0518Z-170808T0815Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TX-Fort Bend TX-Harris TX-
1218 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Southeastern Montgomery County in southeastern Texas...
North central Fort Bend County in southeastern Texas...
Central Harris County in southeastern Texas...
* Until 315 AM CDT.
* At 1218 AM CDT, Doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. This will cause minor flooding in
the advisory area. Up to two inches of rain have already fallen.
* Some locations that will experience flooding include...
Northeastern Sugar Land, Bellaire, Humble, West University Place,
Jacinto City, Jersey Village, Hunters Creek Village, Bunker Hill
Village, Piney Point Village, Downtown Houston, Greenway / Upper
Kirby Area, Kingwood, Spring Branch North, Second Ward, Greater
Greenspoint, Spring, Greater Heights, Mission Bend, Neartown /
Montrose and Memorial Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
Fun looking cell merger about to take place. Placing my money on a FF warning being needed in the next hour somewhere in Harris County East of the 45.
EDIT: Do I get a prize?
EDIT: Do I get a prize?
Last edited by StormOne on Tue Aug 08, 2017 12:26 am, edited 1 time in total.
A transplant from Houston to Lincoln, Nebraska.
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Houston/Galveston TX
1223 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flash Flood Warning for...
Southern Montgomery County in southeastern Texas...
Northeastern Fort Bend County in southeastern Texas...
Southeastern Waller County in southeastern Texas...
Harris County in southeastern Texas...
* Until 330 AM CDT.
* At 1222 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Reports
are coming in that Bear Creek Village is flooding.
Up to three inches of rain have already fallen. Flash flooding is
already occuring.
* Some locations that will experience flooding include...
Northern Sugar Land, northern Missouri City, Stafford, Bellaire,
Humble, West University Place, Katy, Richmond, Tomball, Jacinto
City, Jersey Village, Brookshire, Hunters Creek Village, Bunker
Hill Village, Piney Point Village, Pinehurst, Downtown Houston,
Greenway / Upper Kirby Area, Kingwood and Spring Branch North.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flash Flood Warning
National Weather Service Houston/Galveston TX
1223 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flash Flood Warning for...
Southern Montgomery County in southeastern Texas...
Northeastern Fort Bend County in southeastern Texas...
Southeastern Waller County in southeastern Texas...
Harris County in southeastern Texas...
* Until 330 AM CDT.
* At 1222 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Reports
are coming in that Bear Creek Village is flooding.
Up to three inches of rain have already fallen. Flash flooding is
already occuring.
* Some locations that will experience flooding include...
Northern Sugar Land, northern Missouri City, Stafford, Bellaire,
Humble, West University Place, Katy, Richmond, Tomball, Jacinto
City, Jersey Village, Brookshire, Hunters Creek Village, Bunker
Hill Village, Piney Point Village, Pinehurst, Downtown Houston,
Greenway / Upper Kirby Area, Kingwood and Spring Branch North.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
-
Texaspirate11
- Posts: 1278
- Joined: Tue Dec 31, 2013 12:24 am
- Contact:
That alert definitely woke me up.
We've already had a little over 3 inches the past 2 days
and its pouring!
We've already had a little over 3 inches the past 2 days
and its pouring!
Just because you're disabled, you don't have to be a victim
Be Weather Aware & Prepared!
Barbara Jordan Winner in Media
Disability Integration Consultant
Be Weather Aware & Prepared!
Barbara Jordan Winner in Media
Disability Integration Consultant
-
srainhoutx
- Site Admin
- Posts: 19616
- Joined: Tue Feb 02, 2010 2:32 pm
- Location: Maggie Valley, NC
- Contact:
Flash Flood Warning Update from Jeff:
Flash Flood Warning for Harris and Fort Bend Counties until 330am.
Band of excessive rainfall with numerous locations over 1.0 inch in 15 minutes from Katy to The Woodlands. Strong cells over SC Harris County will merge with this band from Aldine to West Houston to Alief over the next 30 minutes resulting in intense rainfall rates of 1-2 inches in 30 minutes. Deep street flooding is likely in the flash flood warning area.
South Mayde Creek at Greenhouse:
3-4 inches across the watershed today with 1.5-2.5 in the last hour. Creek is rising rapidly and may reach bankfull overnight
Several watershed across the western portions of Harris County are rising rapidly, but remain well within banks at this time.
Significant rises on White Oak, Buffalo, and Brays Bayous will be possible over the next 2-3 hours as excessive rainfall shifts over these watersheds.
Flash Flood Warning for Harris and Fort Bend Counties until 330am.
Band of excessive rainfall with numerous locations over 1.0 inch in 15 minutes from Katy to The Woodlands. Strong cells over SC Harris County will merge with this band from Aldine to West Houston to Alief over the next 30 minutes resulting in intense rainfall rates of 1-2 inches in 30 minutes. Deep street flooding is likely in the flash flood warning area.
South Mayde Creek at Greenhouse:
3-4 inches across the watershed today with 1.5-2.5 in the last hour. Creek is rising rapidly and may reach bankfull overnight
Several watershed across the western portions of Harris County are rising rapidly, but remain well within banks at this time.
Significant rises on White Oak, Buffalo, and Brays Bayous will be possible over the next 2-3 hours as excessive rainfall shifts over these watersheds.
Carla/Alicia/Jerry(In The Eye)/Michelle/Charley/Ivan/Dennis/Katrina/Rita/Wilma/Humberto/Ike/Harvey
Member: National Weather Association
Facebook.com/Weather Infinity
Twitter @WeatherInfinity
Member: National Weather Association
Facebook.com/Weather Infinity
Twitter @WeatherInfinity
Flood Advisory
National Weather Service Houston/Galveston TX
1258 AM CDT TUE AUG 8 2017
TXC015-089-080800-
/O.NEW.KHGX.FA.Y.0207.170808T0558Z-170808T0800Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Colorado TX-Austin TX-
1258 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Northeastern Colorado County in southeastern Texas...
Southeastern Austin County in southeastern Texas...
* Until 300 AM CDT.
* At 1257 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause minor flooding in the advisory area.
Up to three inches of rain have already fallen.
* Some locations that will experience flooding include...
Sealy, Eagle Lake and San Felipe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
National Weather Service Houston/Galveston TX
1258 AM CDT TUE AUG 8 2017
TXC015-089-080800-
/O.NEW.KHGX.FA.Y.0207.170808T0558Z-170808T0800Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Colorado TX-Austin TX-
1258 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Northeastern Colorado County in southeastern Texas...
Southeastern Austin County in southeastern Texas...
* Until 300 AM CDT.
* At 1257 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause minor flooding in the advisory area.
Up to three inches of rain have already fallen.
* Some locations that will experience flooding include...
Sealy, Eagle Lake and San Felipe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON, TX
1259 AM CDT Tue Aug 8 2017
...The National Weather Service in Houston/Galveston has issued a flood warning
for the following rivers...
South Mayde Creek Near Greenhouse Road affecting the following counties in
Texas...Harris
For the Addicks Reservoir at Greenhouse Road, Minor flooding is occuring.
The current weather is dominated by a slow moving cluster of thunderstorms.
This weather system will produce rainfall amounts ranging from 3 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons are urged to stay away from the river until water levels recede.
Motorists should avoid any water covered roads and find an alternate route.
Livestock and equipment should remain out of the flood plain for the next few
days.
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON, TX
1259 AM CDT Tue Aug 8 2017
...The National Weather Service in Houston/Galveston has issued a flood warning
for the following rivers...
South Mayde Creek Near Greenhouse Road affecting the following counties in
Texas...Harris
For the Addicks Reservoir at Greenhouse Road, Minor flooding is occuring.
The current weather is dominated by a slow moving cluster of thunderstorms.
This weather system will produce rainfall amounts ranging from 3 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons are urged to stay away from the river until water levels recede.
Motorists should avoid any water covered roads and find an alternate route.
Livestock and equipment should remain out of the flood plain for the next few
days.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
Flood Advisory
National Weather Service Houston/Galveston TX
103 AM CDT TUE AUG 8 2017
TXC071-201-291-080900-
/O.NEW.KHGX.FA.Y.0208.170808T0603Z-170808T0900Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chambers TX-Liberty TX-Harris TX-
103 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Northwestern Chambers County in southeastern Texas...
Southwestern Liberty County in southeastern Texas...
Northeastern Harris County in southeastern Texas...
* Until 400 AM CDT.
* At 102 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause minor flooding in the advisory area.
Up to one inch of rain has already fallen, with additional heavy
rain on the way.
* Some locations that will experience flooding include...
Northwestern Pasadena, Baytown, Deer Park, Galena Park, Jacinto
City, Liberty, Dayton, Beach City, Cloverleaf, Channelview,
Highlands, Barrett, Crosby, Mont Belvieu, Old River-Winfree,
Hardin, Kenefick, Cove, Morgan`s Point and Dayton Lakes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
National Weather Service Houston/Galveston TX
103 AM CDT TUE AUG 8 2017
TXC071-201-291-080900-
/O.NEW.KHGX.FA.Y.0208.170808T0603Z-170808T0900Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chambers TX-Liberty TX-Harris TX-
103 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Northwestern Chambers County in southeastern Texas...
Southwestern Liberty County in southeastern Texas...
Northeastern Harris County in southeastern Texas...
* Until 400 AM CDT.
* At 102 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause minor flooding in the advisory area.
Up to one inch of rain has already fallen, with additional heavy
rain on the way.
* Some locations that will experience flooding include...
Northwestern Pasadena, Baytown, Deer Park, Galena Park, Jacinto
City, Liberty, Dayton, Beach City, Cloverleaf, Channelview,
Highlands, Barrett, Crosby, Mont Belvieu, Old River-Winfree,
Hardin, Kenefick, Cove, Morgan`s Point and Dayton Lakes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Houston/Galveston TX
116 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flash Flood Warning for...
Southeastern Montgomery County in southeastern Texas...
Northwestern Chambers County in southeastern Texas...
Southwestern Liberty County in southeastern Texas...
Northeastern Harris County in southeastern Texas...
* Until 415 AM CDT.
* At 115 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen with additional heavy rainfall on the way. Flash
flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Liberty, Dayton, Barrett, Crosby, Mont Belvieu, Patton Village,
Roman Forest, Old River-Winfree, Ames, Hardin, Plum Grove,
Kenefick, Dayton Lakes, Lake Houston Dam, Lake Houston, Sheldon and
southeastern Atascocita.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flash Flood Warning
National Weather Service Houston/Galveston TX
116 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flash Flood Warning for...
Southeastern Montgomery County in southeastern Texas...
Northwestern Chambers County in southeastern Texas...
Southwestern Liberty County in southeastern Texas...
Northeastern Harris County in southeastern Texas...
* Until 415 AM CDT.
* At 115 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen with additional heavy rainfall on the way. Flash
flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Liberty, Dayton, Barrett, Crosby, Mont Belvieu, Patton Village,
Roman Forest, Old River-Winfree, Ames, Hardin, Plum Grove,
Kenefick, Dayton Lakes, Lake Houston Dam, Lake Houston, Sheldon and
southeastern Atascocita.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
Flood Advisory
National Weather Service Houston/Galveston TX
120 AM CDT TUE AUG 8 2017
TXC039-080915-
/O.NEW.KHGX.FA.Y.0209.170808T0620Z-170808T0915Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Brazoria TX-
120 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Southeastern Brazoria County in southeastern Texas...
* Until 415 AM CDT.
* At 119 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause minor flooding in the advisory area.
Radar estimates up to two inches of rain have already fallen, with
isolated accumulations around three inches.
* Some locations that will experience flooding include...
Lake Jackson, northwestern Freeport, Clute, Richwood and Oyster
Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
National Weather Service Houston/Galveston TX
120 AM CDT TUE AUG 8 2017
TXC039-080915-
/O.NEW.KHGX.FA.Y.0209.170808T0620Z-170808T0915Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Brazoria TX-
120 AM CDT TUE AUG 8 2017
The National Weather Service in League City has issued a
* Flood Advisory for...
Southeastern Brazoria County in southeastern Texas...
* Until 415 AM CDT.
* At 119 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause minor flooding in the advisory area.
Radar estimates up to two inches of rain have already fallen, with
isolated accumulations around three inches.
* Some locations that will experience flooding include...
Lake Jackson, northwestern Freeport, Clute, Richwood and Oyster
Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
~~~When Thunder Roars Go Indoors~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
~~~Turn Around Don't Drown~~~
~~~Run From The Water, Hide From The Wind~~~
MESOSCALE PRECIPITATION DISCUSSION 0651
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1034 PM EDT MON AUG 07 2017
AREAS AFFECTED...SOUTHEAST TX
CONCERNING...HEAVY RAINFALL...FLASH FLOODING POSSIBLE
VALID 080234Z - 080834Z
SUMMARY...THUNDERSTORMS ARE BEGINNING TO FIRE WITHIN THE SOUTHEAST
QUADRANT OF AN MCV. HOURLY RAIN TOTALS UP TO 2.5" AND LOCAL
AMOUNTS TO 5" ARE EXPECTED.
DISCUSSION...RADAR IMAGERY REVEALS AN MCV FROM MORNING
THUNDERSTORM ACTIVITY IN SOUTH-CENTRAL TX MOVING INTO THE REGION,
TO THE EAST-SOUTHEAST AT 10-15 KTS. CIN HAS DEVELOPED ACROSS THE
REGION, WHICH IS ALLOWING THE INSTABILITY ALOFT/MU CAPE TO ITS
SOUTHEAST TO BE TAPPED, ON THE ORDER OF 1000-3000 J/KG. WHILE
VAD WIND PROFILES SHOW CYCLONIC INFLOW OF 20 KTS, RADAR-BASED CELL
MOTIONS IMPLY THAT 30 KTS IS A BETTER INDICATION OF THE 850 HPA
INFLOW. THIS IS 10 KTS ABOVE THE LEVEL OF THE MEAN 850-400 HPA
FLOW. EFFECTIVE BULK SHEAR OF ~30 KTS EXISTS NEAR THE MCV.
PRECIPITABLE WATER VALUES ARE 2-2.2" PER GPS DATA.
THE GUIDANCE HAS A SMALL BUT AGREEABLE MAXIMUM SCATTERED ACROSS
THE REGION OF 5", WHICH IS LIKELY DUE TO THIS MCV. RAINFALL
EFFICIENCY IS EXPECTED TO INCREASE WITH TIME AS THE MEAN 850-400
HPA FLOW WEAKENS TO 5-10 KTS BY 09Z. THE 18Z SSEO NEIGHBORHOOD
PROBABILITIES OF EXCEEDING THE THREE HOUR FLASH FLOOD GUIDANCE
SHOW SMALL 50%+ SPOTS BETWEEN 05 AND 09Z. HOURLY RAIN RATES UP TO
2.5" ARE POSSIBLE NEAR ITS CENTER AND WITHIN ITS SOUTHERN AND
EASTERN QUADRANTS. DUE TO RAINFALL OVER THE PAST 18 HOURS, FLASH
FLOOD GUIDANCE IS COMING DOWNWARD. CONSIDERING THE AMOUNTS
EXPECTED, FLASH FLOODING IS A CONCERN, PARTICULARLY WITHIN URBAN
AREAS.
ROTH
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