Alert archive / Texas / Flash Flood Warnings in 2024

Flash Flood Warning 38, NWS Houston/Galveston, TX

May 5, 20246 counties in Texas

NWS Houston/Galveston, TX issued this flash flood warning at May 5, 2024, 6:13 AM CDT for 6 counties in Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 5, 2024, 6:13 AM CDT (11:13 UTC)
Expired
May 5, 2024, 9:46 AM CDT
In force
4 hr
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

Counties Grimes County, TX, Houston County, TX, Madison County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 162 km from the middle of the area, began a volume at 11:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.2 hours before the alert went out and 239 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2024-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1172 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2024-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1172 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
881 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
-10 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at May 5, 2:29 AM CDT, 3 hours 44 minutes earlier.

Area forecast discussion, May 5, 2:29 AM CDT, 3 hours 44 minutes before
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In the hours before

Special weather statement, May 5, 1:16 AM CDT, 4 hours 57 minutes before
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Special weather statement, May 5, 4:32 AM CDT, 1 hour 41 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
432 AM CDT Sun May 5 2024

TXZ197-198-210>212-226-051015-
Washington TX-Waller TX-Grimes TX-Wharton TX-Colorado TX-Austin TX-
432 AM CDT Sun May 5 2024

...STRONG THUNDERSTORMS WILL IMPACT COLORADO...NORTH CENTRAL
WHARTON...AUSTIN...SOUTHWESTERN GRIMES...WASHINGTON AND WESTERN
WALLER COUNTIES THROUGH 515 AM CDT...

At 432 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles southwest of Washington to near
Hallettsville. Movement was east at 35 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Brenham, Sealy, Hempstead, Bellville, Columbus, Eagle Lake, Shelby,
Weimar, Pine Island, San Felipe, Industry, Burton, Carmine, New Ulm,
Quarry, Cat Spring, Sheridan, Altair, Frelsburg, and Garwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2996 9657 3004 9662 3011 9663 3013 9665
      3015 9665 3016 9669 3015 9672 3029 9665
      3022 9603 2942 9616 2943 9665 2958 9679
      2958 9684 2961 9684 2963 9687
TIME...MOT...LOC 0932Z 277DEG 45KT 3024 9623 2948 9696

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

JM
Special weather statement, May 5, 4:46 AM CDT, 1 hour 27 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
446 AM CDT Sun May 5 2024

TXZ163-164-176-177-195>199-212-051030-
Madison TX-Walker TX-Brazos TX-Washington TX-Waller TX-Grimes TX-
Burleson TX-Montgomery TX-Houston TX-Trinity TX-
446 AM CDT Sun May 5 2024

...STRONG THUNDERSTORMS WILL IMPACT WEST CENTRAL TRINITY...GRIMES...
SOUTHEASTERN BURLESON...BRAZOS...NORTHEASTERN WASHINGTON...
NORTHWESTERN MONTGOMERY...SOUTHWESTERN HOUSTON...MADISON...
NORTHEASTERN WALLER AND WALKER COUNTIES THROUGH 530 AM CDT...

At 446 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Fort Boggy State Park to 7
miles southwest of Washington. Movement was northeast at 35 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
College Station, Bryan, Huntsville, Navasota, Madisonville,
Pinehurst, Washington, Magnolia, Somerville, Montgomery, Snook,
Bedias, Kurten, Wixon Valley, Millican, Anderson, Todd Mission, Lake
Somerville Dam, Kyle Field, and Huntsville State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3110 9536 3017 9569 3024 9657 3099 9621
      3109 9598 3109 9576 3112 9577
TIME...MOT...LOC 0946Z 245DEG 33KT 3109 9597 3024 9622

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

JM
Special weather statement, May 5, 5:32 AM CDT, 41 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
532 AM CDT Sun May 5 2024

TXZ197-199-210>213-226-227-051100-
Washington TX-Waller TX-Wharton TX-Colorado TX-Inland Harris TX-
Fort Bend TX-Montgomery TX-Austin TX-
532 AM CDT Sun May 5 2024

...STRONG THUNDERSTORMS WILL IMPACT EASTERN COLORADO...NORTHEASTERN
WHARTON...AUSTIN...SOUTHEASTERN WASHINGTON...WESTERN FORT BEND...
SOUTHWESTERN MONTGOMERY...WALLER AND NORTHWESTERN HARRIS COUNTIES
THROUGH 600 AM CDT...

At 531 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Hockley to 10 miles northwest of Pierce.
Movement was east at 30 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Rosenberg, Katy, Richmond, Tomball, Wharton, Jersey Village, Sealy,
Hempstead, Prairie View, Brookshire, Bellville, Eagle Lake, Mission
Bend, Pecan Grove, Eldridge / West Oaks, Addicks Park Ten, Spring
Branch West, Hockley, Needville, and Waller.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3008 9544 2925 9587 2945 9665 3014 9627
TIME...MOT...LOC 1031Z 278DEG 43KT 3007 9583 2937 9629

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

JM
Special weather statement, May 5, 5:47 AM CDT, 26 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
547 AM CDT Sun May 5 2024

TXZ163-164-176-177-179-051130-
Madison TX-Walker TX-Polk TX-Houston TX-Trinity TX-
547 AM CDT Sun May 5 2024

...STRONG THUNDERSTORMS WILL IMPACT TRINITY...HOUSTON...NORTHEASTERN
MADISON...NORTHERN POLK AND NORTHEASTERN WALKER COUNTIES THROUGH 630
AM CDT...

At 547 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southwest of Elkhart to near Riverside.
Movement was east at 35 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Crockett, Austonio, Apple Springs, Trinity, Corrigan, Grapeland,
Groveton, Lovelady, Kennard, Latexo, Pennington, Moscow, Weches,
Centralia, and Mound City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3158 9517 3152 9510 3147 9510 3144 9501
      3138 9495 3134 9496 3133 9490 3128 9488
      3126 9490 3123 9486 3115 9486 3106 9456
      3101 9466 3090 9463 3094 9564 3129 9568
      3134 9566 3138 9569 3151 9571 3157 9549
TIME...MOT...LOC 1047Z 266DEG 39KT 3155 9565 3076 9537

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

JM
Special weather statement, May 5, 6:01 AM CDT, 12 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
601 AM CDT Sun May 5 2024

TXZ199-210>213-226-227-051145-
Waller TX-Wharton TX-Colorado TX-Inland Harris TX-Fort Bend TX-
Montgomery TX-Austin TX-
601 AM CDT Sun May 5 2024

...STRONG THUNDERSTORMS WILL IMPACT EAST CENTRAL COLORADO...
NORTHEASTERN WHARTON...SOUTHEASTERN AUSTIN...FORT BEND...SOUTHEASTERN
MONTGOMERY...SOUTHERN WALLER AND CENTRAL HARRIS COUNTIES THROUGH 645
AM CDT...

At 601 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Pinehurst to Kendleton. Movement was east
at 35 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Sugar Land, Missouri City, Rosenberg, Stafford, Bellaire, Humble,
West University Place, Katy, Richmond, Jersey Village, Sealy, Prairie
View, Brookshire, Hunters Creek Village, Eagle Lake, Bunker Hill
Village, Piney Point Village, Downtown Houston, Greenway / Upper
Kirby Area, and Spring Branch North.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3004 9515 2935 9564 2948 9657 3008 9600
TIME...MOT...LOC 1101Z 265DEG 33KT 3023 9561 2944 9601

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

JM

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 10:50 PM CDTSpecial Weather StatementHGXGrimes40 min
May 4, 11:21 PM CDTSpecial Weather StatementHGXWalker24 min
May 4, 11:23 PM CDTSpecial Weather StatementHGXTrinity37 min
May 5, 12:09 AM CDTSpecial Weather StatementHGXTrinity51 min
May 5, 12:29 AM CDTSpecial Weather StatementHGXWalker46 min
May 5, 12:32 AM CDTSpecial Weather StatementHGXMadison43 min
May 5, 12:34 AM CDTSevere Thunderstorm WarningHGXHouston, Madison, Trinity, Walker41 min
May 5, 12:48 AM CDTAreal Flood AdvisoryHGXGrimes, Houston, Madison, Montgomery, Polk, San Jacinto and 2 more6 hr
May 5, 12:49 AM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto, Trinity, Walker26 min
May 5, 1:16 AM CDTSpecial Weather StatementHGXPolk29 min
May 5, 2:13 AM CDTRip Current StatementHGXBrazoria, Galveston, Matagorda70 hr
May 5, 4:32 AM CDTSpecial Weather StatementHGXAustin, Colorado, Washington43 min
May 5, 4:46 AM CDTSpecial Weather StatementHGXBrazos, Grimes, Madison, Walker44 min
May 5, 5:08 AM CDTSevere Thunderstorm WarningHGXBrazos, Grimes, Harris, Houston, Madison, Montgomery and 4 more37 min
May 5, 5:32 AM CDTSpecial Weather StatementHGXAustin, Colorado, Fort Bend, Waller28 min
May 5, 5:44 AM CDTSevere Thunderstorm WarningHGXGrimes, Harris, Houston, Liberty, Madison, Montgomery and 5 more46 min
May 5, 5:47 AM CDTSpecial Weather StatementHGXHouston, Trinity43 min
May 5, 5:53 AM CDTAreal Flood AdvisoryHGXBrazos, Grimes, Harris, Montgomery, Walker, Waller and 1 more67 min
May 5, 6:01 AM CDTSpecial Weather StatementHGXFort Bend, Harris, Waller44 min
May 5, 6:31 AM CDTSpecial Weather StatementHGXMontgomery, Polk, San Jacinto44 min
May 5, 6:44 AM CDTFlash Flood WarningHGXMontgomery, Polk, San Jacinto, Trinity, Walker3 hr
May 5, 6:53 AM CDTAreal Flood AdvisoryHGXBrazos, Grimes, Harris, Liberty, Montgomery, San Jacinto and 3 more3 hr
May 5, 8:07 AM CDTSpecial Weather StatementHGXFort Bend23 min
May 5, 9:46 AM CDTAreal Flood WarningHGXGrimes, Houston, Madison, San Jacinto, Trinity, Walker4 hr
May 5, 9:48 AM CDTAreal Flood WarningHGXMontgomery, Polk, San Jacinto, Trinity, Walker4 hr
May 5, 9:58 AM CDTAreal Flood AdvisoryHGXAustin, Chambers, Fort Bend, Harris, Liberty, Montgomery and 1 more2 hr
May 5, 9:59 AM CDTSpecial Weather StatementHGXHarris31 min
May 5, 10:46 AM CDTRiver Flood WarningHGXPolk, San Jacinto26 hr
May 5, 10:52 AM CDTSpecial Marine WarningHGX23 min
May 5, 11:26 AM CDTSpecial Weather StatementHGXJackson34 min
May 5, 11:58 AM CDTAreal Flood WarningHGXBrazos, Grimes48 hr
May 5, 12:14 PM CDTSpecial Weather StatementHGXColorado31 min
May 5, 12:45 PM CDTSpecial Weather StatementHGXJackson30 min
May 5, 12:54 PM CDTSevere Thunderstorm WarningHGXJackson24 min
May 5, 1:25 PM CDTAreal Flood AdvisoryHGXAustin, Colorado3 hr
May 5, 1:39 PM CDTSpecial Weather StatementHGXMatagorda36 min
May 5, 2:21 PM CDTSpecial Weather StatementHGXBrazoria24 min
May 5, 2:53 PM CDTSpecial Weather StatementHGXColorado37 min
May 5, 3:04 PM CDTSpecial Marine WarningHGX26 min
May 5, 4:33 PM CDTAreal Flood AdvisoryHGXAustin, Colorado, Fort Bend, Wharton3 hr

Nearby

Flash Flood Warnings in Texas, 2024Every flash flood warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.