May 2021:

[Cpv17]

Man it’s absolutely pouring buckets here in central Wharton County right now. Rain started here about 30 min ago. This is gonna be bad.

[Stratton20]

Im hearing reports that a violent tornado has been spotted on the ground near la grange, and 5 inch per hour rainfall rates this is going to be a brutal night yall

[jabcwb2]

Does any one have maps of where the brunt of this storm is going? Or areas of impact? Thanks so much!!!

[Cromagnum]

That La Grange storm is no joke.

[Stratton20]

That whole line is making me nervous, I dont see it weaking with the huge influx of gulf moisture feeding into it, storms are producing 3-5 inch per hour rain fall rates. Heard a city near la grange picked up 6 inches of rain in an hour

[don]

I am getting very concerned about tonight, that line is moving slow, with very high rainfall rates. The sun coming out today has added fuel for these storms.

[Kingwood36]

Tornado watch for Brazoria County

[Dls2010r]

Oh boy

[Dls2010r]

I’m in Santa Fe. The ground is getting wet and the ditches are half full.

[Dls2010r]

And we haven’t really had anything yet

[don]

ww0190_overview_wou.gif

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 190
NWS Storm Prediction Center Norman OK
730 PM CDT Tue May 18 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Southeast and south Texas
Coastal Waters

* Effective this Tuesday night and Wednesday morning from 730 PM
until 200 AM CDT.

* Primary threats include...
A couple tornadoes possible
Scattered damaging winds and isolated significant gusts to 75
mph possible
Isolated very large hail events to 2 inches in diameter possible

SUMMARY...Slow-moving QLCS with embedded supercell structures should
evolve east-northeast towards the Upper to Middle Texas Coast
tonight. Brief tornadoes and damaging winds will be the primary
severe hazards, with large hail also possible with any trailing
cells to the southwest.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 40 miles north northeast of Houston
TX to 70 miles west of Beeville TX. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 188...WW 189...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 25025.[/b]

...Grams

[869MB]

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 190
NWS Storm Prediction Center Norman OK
730 PM CDT Tue May 18 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Southeast and south Texas
Coastal Waters

* Effective this Tuesday night and Wednesday morning from 730 PM
until 200 AM CDT.

* Primary threats include...
A couple tornadoes possible
Scattered damaging winds and isolated significant gusts to 75
mph possible
Isolated very large hail events to 2 inches in diameter possible

SUMMARY...Slow-moving QLCS with embedded supercell structures should
evolve east-northeast towards the Upper to Middle Texas Coast
tonight. Brief tornadoes and damaging winds will be the primary
severe hazards, with large hail also possible with any trailing
cells to the southwest.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 40 miles north northeast of Houston
TX to 70 miles west of Beeville TX. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 188...WW 189...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 25025.

...Grams

[Cpv17]

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 190
NWS Storm Prediction Center Norman OK
730 PM CDT Tue May 18 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Southeast and south Texas
Coastal Waters

* Effective this Tuesday night and Wednesday morning from 730 PM
until 200 AM CDT.

* Primary threats include...
A couple tornadoes possible
Scattered damaging winds and isolated significant gusts to 75
mph possible
Isolated very large hail events to 2 inches in diameter possible

SUMMARY...Slow-moving QLCS with embedded supercell structures should
evolve east-northeast towards the Upper to Middle Texas Coast
tonight. Brief tornadoes and damaging winds will be the primary
severe hazards, with large hail also possible with any trailing
cells to the southwest.

The tornado watch area is approximately along and 55 statute miles
north and south of a line from 40 miles north northeast of Houston
TX to 70 miles west of Beeville TX. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 188...WW 189...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 25025.

...Grams

Look at that line and how it extends all the way back into Mexico. Geez, this is going to be a big training event. Moisture coming in from the Pacific and the Gulf it looks like.

[TexasBreeze]

It looks like it is going to keep moving along to me even though it is slow moving.

[txbear]

Watch expanded eastward as I had thought. Just too much energy out there, and as y’all have already noted the sun being out much of the day really added fuel to the fire.

That’s a heck of a line. One of the more impressive ones I’ve seen in some time. Watch that area to the east of Halletsville and west of Sealy-ish for rotation. Going to be a long night.

[Cpv17]

It looks like it is going to keep moving along to me even though it is slow moving.

I agree. I’m not seeing it stall out really.

[Stratton20]

I have to disagree with that, seems like the line is crawling at best, no chance we avoid the flooding threat

[Cromagnum]

No doubts that was a big tornado near Schulenburg earlier.

https://mobile.twitter.com/NWSSanAntoni ... 6141105153

[Stratton20]

Seeing that volacity on the radar, wouldnt be shocked if that torando was a strong ef-2

[869MB]

FXUS64 KHGX 190125
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
825 PM CDT Tue May 18 2021


...Heavy rain/flooding threat is high through the night and brief
period for tornadoes through around midnight...

.SHORT TERM [Tonight through Wednesday]...
Line of storms from around Madisonville to Brenham to Columbus to
near Edna moving slowly eastward. High CAPE and high helicity
environment with a tornado threat will be diminishing after 9 pm.
Low level jet strengthening through the evening the threat may
transition to very intense rainfall rates of 3-4" per hour.
Extensive flooding in the areas around Moulton to Flatonia to La
Grange with these storms as they were coalescing and spinning up.
The issue is how progressive will the system be...guidance is
split with a slower move to the northeast or it becomes cold pool
dominant and pushes out to the southeast. Very difficult call at
this point.

3-4"/hour rainfall rates can be extremely dangerous and street
flooding will take place in minutes and if the system slows down
the streams/rivers/bayous will respond with very rapid rises.

Flash Flood Watch and Tornado Watch in effect.

If you are going to be out and about tonight be prepared to stay
put because roads could become treacherous. If you don't NEED to
go out don't! 45