Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 25, NWS Houston/Galveston, TX

April 19, 20154 counties in Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 19, 2015, 3:44 PM CDT for 4 counties in Texas. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 19, 2015, 3:44 PM CDT (20:44 UTC)
Expired
Apr 19, 2015, 4:45 PM CDT
In force
61 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon

Counties Brazos County, TX, Burleson County, TX, Grimes County, TX, Washington County, TX

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 19, 2:31 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.7 hours before the alert went out and 277 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, Fort Worth, TX at 12:00Z on 2015-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 512 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, Fort Worth, TX at 12:00Z on 2015-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 288 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
512 J/kg
Mixed-layer CIN
-278 J/kg
Mixed-layer LCL
951 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
288 m²/s²
0-3 km storm-relative helicity
283 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Apr 19, 3:27 PM CDT, 17 minutes earlier.

Area forecast discussion, Apr 19, 3:27 PM CDT, 17 minutes before
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Hazardous weather outlook, Apr 19, 6:49 AM CDT, 8 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
649 AM CDT SUN APR 19 2015

TXZ163-164-176>179-195>200-211>213-227-201200-
AUSTIN-BRAZOS-BURLESON-FORT BEND-GRIMES-HARRIS-HOUSTON-LIBERTY-
MADISON-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-
WASHINGTON-
649 AM CDT SUN APR 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT
A COLD FRONT MOVING INTO THE AREA LATE THIS AFTERNOON MAY BRING
ISOLATED STRONG TO SEVERE THUNDERSTORMS BETWEEN 2 AND 6 PM. THE
PRIMARY THREAT SHOULD BE STRONG GUSTY WINDS AND POSSIBLY SMALL
HAIL. RAINFALL TOTALS SHOULD AVERAGE LESS THAN 0.25 INCH WITH
ISOLATED AMOUNTS ASSOCIATED WITH THE STRONGER STORMS AROUND 1
INCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

GMZ335-355-TXZ210-214-226-236>238-201200-
BRAZORIA-CHAMBERS-COLORADO-GALVESTON-GALVESTON BAY-MATAGORDA-
WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON-
649 AM CDT SUN APR 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT
THUNDERSTORMS MAY ARRIVE AFTER 5 PM BRINGING GUSTY NORTHERLY
WINDS AND FREQUENT LIGHTNING.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ330-TXZ235-201200-
JACKSON-MATAGORDA BAY-
649 AM CDT SUN APR 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ350-370-375-201200-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM-
649 AM CDT SUN APR 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Local storm report, Apr 19, 12:12 PM CDT, 3 hours 32 minutes before
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Local storm report, Apr 19, 12:18 PM CDT, 3 hours 26 minutes before
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Special weather statement, Apr 19, 3:01 PM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
301 PM CDT SUN APR 19 2015

TXZ195-192045-
BURLESON TX-
301 PM CDT SUN APR 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL BURLESON COUNTY...

AT 301 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
DIME BOX...OR 8 MILES EAST OF LEXINGTON...MOVING EAST AT 30 MPH.

UP TO HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE
WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
CALDWELL...SOMERVILLE...DEANVILLE AND LYONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN LEAGUE CITY .

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHEASTERN TEXAS.

LAT...LON 3055 9695 3057 9647 3033 9653 3030 9663
      3030 9667 3032 9669 3032 9674 3039 9679
      3043 9685 3043 9687 3046 9688 3046 9690
      3047 9691 3049 9690 3053 9691 3054 9692
TIME...MOT...LOC 2001Z 283DEG 28KT 3044 9686

40
Special weather statement, Apr 19, 3:40 PM CDT, 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 8:41 PM CDTRiver Flood WarningHGXBrazoria5 days
Apr 18, 8:41 PM CDTRiver Flood WarningHGXJackson, Lavaca17 hr
Apr 18, 8:41 PM CDTRiver Flood WarningHGXJackson57 hr
Apr 18, 9:23 PM CDTSpecial Weather StatementHGXBrazos, Burleson, Houston, Madison52 min
Apr 18, 10:15 PM CDTSpecial Weather StatementHGXBrazos, Grimes, Houston, Madison, Walker, Washington60 min
Apr 18, 11:04 PM CDTSpecial Weather StatementHGXPolk, San Jacinto, Trinity56 min
Apr 18, 11:09 PM CDTSpecial Weather StatementHGXAustin, Montgomery, Waller51 min
Apr 18, 11:40 PM CDTSevere Thunderstorm WarningHGXHouston, Polk, San Jacinto, Trinity40 min
Apr 19, 3:01 PM CDTSpecial Weather StatementHGXBurleson44 min
Apr 19, 3:10 PM CDTSevere Thunderstorm WarningHGXBurleson, Washington50 min
Apr 19, 3:40 PM CDTSpecial Weather StatementHGXBrazos35 min
Apr 19, 3:45 PM CDTSevere Thunderstorm WarningHGXBrazos, Grimes, Madison30 min
Apr 19, 4:16 PM CDTSpecial Weather StatementHGXWashington44 min
Apr 19, 4:22 PM CDTSpecial Weather StatementHGXMadison23 min
Apr 19, 4:35 PM CDTSpecial Weather StatementHGXWashington40 min
Apr 19, 4:39 PM CDTSevere Thunderstorm WarningHGXGrimes, Houston, Madison, Walker36 min
Apr 19, 4:46 PM CDTSevere Thunderstorm WarningHGXGrimes, Harris, Waller, Washington44 min
Apr 19, 4:50 PM CDTSevere Thunderstorm WarningHGXBurleson, Washington25 min
Apr 19, 4:59 PM CDTSevere Thunderstorm WarningHGXHouston, Trinity31 min
Apr 19, 5:10 PM CDTSevere Thunderstorm WarningHGXGrimes, Walker21 min
Apr 19, 5:12 PM CDTSevere Thunderstorm WarningHGXGrimes, Harris, Montgomery, Waller48 min
Apr 19, 5:16 PM CDTSevere Thunderstorm WarningHGXHouston, Trinity, Walker29 min
Apr 19, 5:29 PM CDTSpecial Weather StatementHGXTrinity31 min
Apr 19, 5:32 PM CDTSpecial Weather StatementHGXWalker28 min
Apr 19, 5:47 PM CDTSevere Thunderstorm WarningHGXGrimes, Walker28 min
Apr 19, 5:55 PM CDTSevere Thunderstorm WarningHGXHarris, Montgomery, Waller65 min
Apr 19, 5:59 PM CDTSevere Thunderstorm WarningHGXGrimes, Harris, Montgomery, Waller31 min
Apr 19, 6:13 PM CDTSpecial Weather StatementHGXWaller47 min
Apr 19, 6:16 PM CDTSpecial Weather StatementHGXWalker29 min
Apr 19, 6:21 PM CDTSpecial Weather StatementHGXAustin24 min
Apr 19, 6:27 PM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Waller33 min
Apr 19, 6:31 PM CDTAreal Flood AdvisoryHGXHarris119 min
Apr 19, 6:38 PM CDTSevere Thunderstorm WarningHGXHarris, Liberty, Montgomery37 min
Apr 19, 6:41 PM CDTTornado WarningHGXHarris, Liberty34 min
Apr 19, 6:47 PM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Waller28 min
Apr 19, 6:58 PM CDTSevere Thunderstorm WarningHGXHarris47 min
Apr 19, 6:59 PM CDTSevere Thunderstorm WarningHGXAustin, Fort Bend, Harris, Waller31 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015Every severe thunderstorm warning in 2015

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.