July 2020

General Weather Discussions and Analysis
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jasons2k
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I’m at 101 with a heat index of 123.

Edit: 103 with a heat index of 126.
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tireman4
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I, will again, state i loathe Summer
Cromagnum
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jasons2k wrote: Mon Jul 13, 2020 2:34 pm I’m at 101 with a heat index of 123.

Edit: 103 with a heat index of 126.
Where the heck is that? Its unusual to be triple digits and still extremely humid.
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jasons2k
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Cromagnum wrote: Mon Jul 13, 2020 6:56 pm
jasons2k wrote: Mon Jul 13, 2020 2:34 pm I’m at 101 with a heat index of 123.

Edit: 103 with a heat index of 126.
Where the heck is that? Its unusual to be triple digits and still extremely humid.
I live in Imperial Oaks, east of 45 and north of Rayford. Other thermometers in the area had similar readings. At the time, my humidity was 45%, and I think my dew point was 79. I stepped outside and it was humid - felt like a sauna. I know people say that a lot but yesterday, I put my swim suit on and sat outside in the sun, at about 3pm. By five minutes, I was burning-up and sweating profusely. I have sat in saunas before - both a wet and a dry sauna. This felt like a wet sauna. After 20 minutes, I was done and went inside.

Keep in mind, this was in my back yard. I have a pretty big back yard but I still have a fence and shrubs along the perimeter. That kept the breeze pretty still today. I also have a decent amount of moisture seeping out because I have a sprinkler system. Most days it may not matter, but today, the wind was pretty calm and my back yard was like a sauna.

I have two thermometers, a digital and an old fashioned mercury that has been calibrated. They are in the shade, 2m up, but may not be far enough away to count as official NWS guidelines. That’s OK though - I don’t really care what my back yard would theoretically be if I had an open field with no obstructions - all I care about is the actual temp in my own back yard - and it was hot!!
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DoctorMu
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DP 79°? Holy **** You must be backed into a swamp. DP was about 74°F at the same time at IAH.

The only good news is some drier air filtered in later this afternoon in CLL and even IAH. Yesterday was horrible. Today was nearly as horrible, but the slight dry admixture late this afternoon and a bit of a breeze spare us the surface of the sun feeling. 102°F yesterday and 101°F today.

2011 was consistently hotter but the DP was lower. Things were a tinderbox.
MH5
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jasons2k wrote: Mon Jul 13, 2020 2:34 pm I’m at 101 with a heat index of 123.

Edit: 103 with a heat index of 126.
Can confirm... This was yesterday at 2:30 in the Heights.
4FB73F25-5616-4207-A098-A5E9D2C12A4A.jpeg
mcheer23
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MH5 wrote: Tue Jul 14, 2020 8:47 am
jasons2k wrote: Mon Jul 13, 2020 2:34 pm I’m at 101 with a heat index of 123.

Edit: 103 with a heat index of 126.
Can confirm... This was yesterday at 2:30 in the Heights.

4FB73F25-5616-4207-A098-A5E9D2C12A4A.jpeg
Which weather station is this?
MH5
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mcheer23 wrote: Tue Jul 14, 2020 10:15 am
MH5 wrote: Tue Jul 14, 2020 8:47 am
jasons2k wrote: Mon Jul 13, 2020 2:34 pm I’m at 101 with a heat index of 123.

Edit: 103 with a heat index of 126.
Can confirm... This was yesterday at 2:30 in the Heights.

4FB73F25-5616-4207-A098-A5E9D2C12A4A.jpeg
Which weather station is this?
I have the Ambient Weather WS-2902-B. Made the switch over from accurite products about a year and a half ago and wish I would have done it much, much sooner. Have had zero issues with the ambient weather product. Couldn’t say the same for accurite and their horrible customer service.
Cpv17
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I just have a hard time believing dp’s in the upper 70’s like that. What that heck causes dp’s to be that high in one certain area? Where I’m at in Wharton dp’s are never that high.
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jasons2k
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Cpv17 wrote: Tue Jul 14, 2020 11:16 pm I just have a hard time believing dp’s in the upper 70’s like that. What that heck causes dp’s to be that high in one certain area? Where I’m at in Wharton dp’s are never that high.

I suspect moisture seeping from my frequently-watered lawn (and perhaps my neighbors) combined with very light winds. But as MH5 showed, there were similar readings down in The Heights. It’s not just me.

I’ll check one of the stations in Oak Ridge this afternoon - he has a Davis Vantage Pro2 system. My station is usually a degree or two within his.
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DoctorMu
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During this heat wave it only feels decent with a breeze about 1 am.

As the ridge slides east, there may be a degree or two knocked off.

Some sea breeze showers are possible for the Houston area next week, and on the coast later this week as the ridge flattens and drifts east. They won't reach College Station, but it's something different and clouds will reduce A/C energy consumption all over.



Area Forecast Discussion
National Weather Service Houston/Galveston TX
632 AM CDT Wed Jul 15 2020

AVIATION [12Z TAF Issuance]...

Stratus will continue to surge southward over the next few hours,
bringing MVFR ceilings for terminals north of I-10. FEW to SCT
decks around 2500-3000 ft will also be possible around KSGR and
KHOU. Otherwise, VFR conditions are expected after 15Z before
MVFR conditions return through the end of the TAF period. 05

&&

.PREV DISCUSSION... /ISSUED 331 AM CDT Wed Jul 15 2020/

SHORT TERM [through Thursday]...

Low level moisture continues to advect northward along the LLJ
over south-central TX, allowing areas of fog/low clouds across our
forecast area early this morning. Clouds will slowly diminish
this morning as daytime boundary layer mixing occurs, giving way
to a mostly sunny day. With the subtropical ridge still dominating
the region, dry and very warm temperatures are again expected
today. A small relief in temperatures is expected as the
aforementioned ridge begins to weaken and 850 hPa temperatures
cool off a few degrees; therefore, temperatures are expected to be
a couple of degrees cooler than previous days. Highs will range
from the mid to upper 90s. A few spots may reach 100 degrees. Heat
indices will range under advisory criteria; that is, from 100 to
107 degrees.

Ridge aloft continues flattening by Thursday, while at the
surface, southerly flow continues to bring low-level moisture in
response to the high pressure drifting westward into the region.
Temperatures will be close to average for this time of year;
however, heat indices around 100 to 107 are expected. Rain chances
are minimal; but cannot rule a few spotty showers in the
afternoon. 05

LONG TERM [Thursday Night through Tuesday]...

Upper ridging will continue to slowly flatten, weaken and eventually
transition further to the east during this time period. Temperatures
will gradually trend back down and closer to climatological norms.

Weakness/trof/vort seen on water vapor imagery over southern MS/AL
will eventually make its way into the Gulf then head westward under
the ridge toward the mid & lower Texas coast. Associated rain
chances re-enter the fcst Thurs night & Fri across the coastal
waters and southern parts of the CWA.

Can`t rule out some iso seabreeze activity each day this weekend,
but it still looks mostly dry for inland locations with
limited/shallow moisture availability and lingering subsidence to
overcome.

We should see better chances of daily, mainly diurnally driven,
precip as we head into early next week as subsidence loosens its
grip, moisture increases, and possibly the approach of another
inverted trof or easterly wave. 47

MARINE...

High pressure over eastern Gulf continues to bring light to moderate
southerly winds today and Thursday. Typical summer-like pattern are
expected with gusty winds along the bays during the day and offshore
at night. Caution level conditions are possible tonight. Seas are
expected around 2 to 4 ft through the end of the week. Winds will
become more southeasterly by Friday as the high drifts westward and
rain chances increase. 05


&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL) 99 77 98 76 98 / 0 0 10 0 10
Houston (IAH) 98 79 96 79 97 / 10 0 10 0 20
Galveston (GLS) 90 82 89 82 91 / 0 10 10 10 30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.
&&
Kingwood36
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If I hear one person complain about winter this yr! So help me God! 😆
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djmike
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Kingwood36 wrote: Wed Jul 15, 2020 6:09 pm If I hear one person complain about winter this yr! So help me God! 😆
Lol That was funny. ...and very true. Lol
Mike
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(IH-10 & College Street)
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tireman4
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#neversummer
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Kingwood36 wrote: Wed Jul 15, 2020 6:09 pm If I hear one person complain about winter this yr! So help me God! 😆
This is me every year in Houston. I hate April through September weather.
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Rip76
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Linder this morning.

Decreasing Heat/Increasing Rain Chances

Large scale upper level pattern is starting to change and the end result will be decreasing high temperatures and increasing rain chances.

Upper level ridge of high pressure responsible for the recent heat wave is shifting from the SW US/southern plains toward the Midwest and Great Lakes which will place coastal TX in the weak upper level easterly flow on the south and southwest side of the ridge starting tomorrow and into much of next week. This will result in inverted upper level troughs and weak tropical waves moving from east to west across the Gulf coast and Gulf of Mexico and into coastal TX. The first wave is currently over SE LA this morning and will move westward and arrive into SE TX on Friday. PWS increase to over 2.0 inches for the first time in days and short range models show a fairly decent looking low level convergence zone over coastal SE TX Friday morning, so would expect scattered to numerous showers and thunderstorms near the coast late tonight into Friday morning and that activity progressing inland during the day on Friday. Rains and clouds will knock back high temperatures from near 100 today to the low 90’s on Friday.
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Belmer
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I've come to enjoy the heat more than the cold the last few years, but can definitely forgo what we've seen the last week. Flirting with a 600dm ridge along with the Gulf humidity makes it just downright miserable. Anytime we are in a pattern like this for 7-10 days makes me wary it could become long term unless a larger pattern can break it. Although I suppose it's better than a constant southwest flow out of Mexico turning the region into a tinderbox *cough* 2011 *cough*.

Of course on the other side of that coin, the deeper we get into summer means the deeper we dive into the ramp up of the Hurricane season. As we roll through the second half of July I'm seeing signs the Atlantic may wake up as we approach August. A large MJO is forecasted during the next couple of weeks over the western Indian Ocean/Africa that will likely produce some vigorous tropical waves moving off the African coast as we wrap up the month. Both the Euro and GFS ensembles have been hinting at some development in the MDR. Shear has relaxed quite considerably across the Atlantic and even in the Caribbean so it will be worth keeping an eye on any wave as it emerges off of Africa to see if any life to it can sustain. The subtropical Atlantic ridge along with a potential of building upper-level high forming off the southeast U.S. coast (still some disagreements on models whether that happens or how long it sticks around) would likely propagate any tropical waves westward into the Caribbean rather than OTS.


MJO forecast through the end of the month:
MJO forecast through the end of the month
MJO forecast through the end of the month
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jasons2k
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I don’t like it when it’s this hot, but I can still tolerate - even enjoy - running in mid-summer as long as I finish before about 8 or 8:30am. I still can’t stand running in a cold north wind during winter.

I’m just glad to see some rain chances back in the forecast and some lower temps.
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MontgomeryCoWx
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MH5 wrote: Tue Jul 14, 2020 10:46 am
mcheer23 wrote: Tue Jul 14, 2020 10:15 am
MH5 wrote: Tue Jul 14, 2020 8:47 am

Can confirm... This was yesterday at 2:30 in the Heights.

4FB73F25-5616-4207-A098-A5E9D2C12A4A.jpeg
Which weather station is this?
I have the Ambient Weather WS-2902-B. Made the switch over from accurite products about a year and a half ago and wish I would have done it much, much sooner. Have had zero issues with the ambient weather product. Couldn’t say the same for accurite and their horrible customer service.
Just bought that weather station for our ranch in Colorado County.

It looks great so far.
Team #NeverSummer
Cpv17
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Just got back home from Concan. Temps there were in between 105 to 110 the whole time I was there. Not as humid but still brutally hot. Dry as a bone out there too. The Frio was pretty low.
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