Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 48, NWS Houston/Galveston, TX

April 25, 2008Washington County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 25, 2008, 10:58 PM CDT for Washington County, Texas. It was in force for 32 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 25, 2008, 10:58 PM CDT (03:58 UTC)
Expired
Apr 25, 2008, 11:30 PM CDT
In force
32 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon

County Washington County, TX

The radar

The Ft Hood radar (KGRK), 110 km from the middle of the area, began a volume at 03:58 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

Corpus Christi, TX (KCRP), launched 00:00Z, 4.0 hours before the alert went out and 291 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, Corpus Christi, TX at 00:00Z on 2008-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1723 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, Corpus Christi, TX at 00:00Z on 2008-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.19395878Sfc1 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
1723 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
588 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

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 25, 9:34 PM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, Apr 25, 9:34 PM CDT, 1 hour 24 minutes before
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Hazardous weather outlook, Apr 25, 3:39 PM CDT, 7 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
339 PM CDT FRI APR 25 2008

TXZ178-179-199-200-210>214-226-227-235>238-261300-
AUSTIN-BRAZORIA-CHAMBERS-COLORADO-FORT BEND-GALVESTON-HARRIS-
JACKSON-LIBERTY-MATAGORDA-MONTGOMERY-POLK-SAN JACINTO-WALLER-
WHARTON-
339 PM CDT FRI APR 25 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHERN TWO-THIRDS OF
SOUTHEAST TEXAS.

.DAY ONE...TONIGHT

A COLD FRONT WILL PUSH INTO THE NORTHERN THIRD OF SOUTHEAST TEXAS
LATE TONIGHT. THIS FRONT MAY GENERATE SOME ISOLATED SHOWERS AND
THUNDERSTORMS NORTH OF THE INTERSTATE 10 CORRIDOR. HOWEVER...THE
SEVERE WEATHER THREAT SHOULD REMAIN NORTH OF THE AREA.

.DAY TWO...SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAY THREE...SUNDAY

A COLD FRONT WILL CROSS SOUTHEAST TEXAS ON SUNDAY. THIS FEATURE
WILL COMBINE WITH A MOIST AND UNSTABLE AIRMASS TO PRODUCE A ROUND
OF SHOWERS AND THUNDERSTORMS. AT THIS TIME...SEVERE WEATHER IS NOT
ANTICIPATED DUE TO LIMITED INSTABILITY. HOWEVER...THE STRONGER
STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS...SMALL HAIL...AND
BRIEF HEAVY RAINFALL. RAINFALL AMOUNTS WILL AVERAGE 1/2 TO 1 INCH
WITH ISOLATED TOTALS OF 1 TO 2 INCHES.

.DAYS FOUR THROUGH SEVEN...MONDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

TXZ163-164-176-177-195>198-261300-
BRAZOS-BURLESON-GRIMES-HOUSTON-MADISON-TRINITY-WALKER-WASHINGTON-
339 PM CDT FRI APR 25 2008

...SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE NORTHERN THIRD OF
SOUTHEAST TEXAS TONIGHT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NORTHERN THIRD OF SOUTHEAST
TEXAS.

.DAY ONE...TONIGHT

A COLD FRONT WILL PUSH INTO THE NORTHERN THIRD OF SOUTHEAST TEXAS
LATE TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP
ALONG THE FRONT AS IT INTERACTS WITH A MOIST AND UNSTABLE AIRMASS
IN PLACE. A FEW OF THE STORMS WILL HAVE THE POTENTIAL TO BECOME
SEVERE...MAINLY NORTH OF A LINE FROM BRENHAM TO HUNTSVILLE TO
TRINITY. LARGE HAIL AND DAMAGING DOWNBURST WINDS WILL BE THE
PRIMARY THREATS. THE PRIMARY TIME FRAME FOR THE SEVERE WEATHER
THREAT WILL BE 9 PM THIS EVENING UNTIL 4 AM SATURDAY MORNING.
SPOTTY RAINFALL AMOUNTS OF 1 TO 2 INCHES WILL BE POSSIBLE IN THE
STRONGER STORMS.

.DAY TWO...SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAY THREE...LATE SATURDAY NIGHT AND SUNDAY

A COLD FRONT WILL CROSS SOUTHEAST TEXAS ON SUNDAY. THIS FEATURE
WILL COMBINE WITH A MOIST AND UNSTABLE AIRMASS TO PRODUCE A ROUND
OF SHOWERS AND THUNDERSTORMS. THE STRONGER STORMS WILL BE CAPABLE
OF PRODUCING GUSTY WINDS...SMALL HAIL...AND BRIEF HEAVY RAINFALL.
A FEW STORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE MAINLY LATE
SATURDAY NIGHT. RAINFALL AMOUNTS WILL AVERAGE AROUND 1 INCH WITH
ISOLATED TOTALS OF AROUND 2 INCHES.

.DAYS FOUR THROUGH SEVEN...MONDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE LATER THIS EVENING.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 1:30 AM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Wharton45 min
Apr 26, 1:48 AM CDTSevere Thunderstorm WarningHGXBrazoria42 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008Every severe thunderstorm warning in 2008

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.