Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 108, NWS Houston/Galveston, TX

August 27, 2002Brazoria County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 27, 2002, 4:29 PM CDT for Brazoria County, Matagorda County, Texas. It was in force for 23 days. 6 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 27, 2002, 4:29 PM CDT (21:29 UTC)
Expired
Sep 19, 2002, 6:30 PM CDT
In force
23 days
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

Counties Brazoria County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 83 km from the middle of the area, began a volume at 21:31 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.

What was reported inside it

TimeReportWhereRemark
Aug 27, 4:35 PM CDTHail 0.75Sweeny, TXDime size hail.
Sep 6, 11:25 PM CDTThunderstorm Wind 61 EFreeport, TXEstimated 70 mph winds in Freeport/Surfside area uprooted and snapped numerous trees.
Sep 7, 12:45 AM CDTTornado F0Lake Jackson, TXTornado sighted west Lake Jackson and CR 332 (very brief touchdown).
Sep 7, 12:55 AM CDTTornado F0Van Vleck, TXTornado destroyed a storm on FM 457 between Van Vleck and Cedar Lane.
Sep 7, 1:30 AM CDTTornado F0West Columbia, TXTornado downed numerous trees in West Columbia along Hwy 36.
Sep 7, 3:15 AM CDTThunderstorm WindMidfield, TXWind gusts damaged fire station and blew off the top of the pavillion at the community center.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.5 hours before the alert went out and 275 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 12:00Z on 2002-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1402 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 12:00Z on 2002-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
1402 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Aug 27, 3:19 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 27, 3:19 PM CDT, 1 hour 10 minutes before
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In the hours before

Special weather statement, Aug 27, 11:09 AM CDT, 5 hours 20 minutes before
GMZ335-TXZ163-164-178-179-200-214-238-272100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1109 AM CDT TUE AUG 27 2002

...SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 4PM FOR THE EASTERN
PORTIONS OF SOUTHEAST TEXAS...

THE FOLLOWING COUNTIES ARE INCLUDED IN THE WATCH AREA.
HOUSTON...TRINITY...POLK...SAN JACINTO...LIBERTY...CHAMBERS AND
GALVESTON COUNTIES OF TEXAS.

A LINE OF THUNDERSTORMS LOCATED FROM LUFKIN TO MADISONVILLE WILL
MOVE RAPIDLY SOUTH SOUTHEAST. MAIN THREAT WILL BE DAMAGING WINDS AS
THIS LINE MOVES THROUGH THE AREA.

PEOPLE IN THE WATCH AREA SHOULD MONITOR YOUR LOCAL TELEVISION...
RADIO OR WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS.
Special weather statement, Aug 27, 12:36 PM CDT, 3 hours 53 minutes before
GMZ335-TXZ163-164-178-179-200-214-238-272100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1236 PM CDT TUE AUG 27 2002

...SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR HOUSTON AND
TRINITY COUNTIES...
...SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 4 PM FOR THE
EASTERN PORTIONS OF SOUTHEAST TEXAS...

THE FOLLOWING COUNTIES HAVE BEEN CANCELLED...
HOUSTON AND TRINITY COUNTIES OF SOUTHEAST TEXAS.

THE FOLLOWING COUNTIES ARE INCLUDED IN THE WATCH AREA...
POLK...SAN JACINTO...LIBERTY...CHAMBERS...AND GALVESTON COUNTIES OF
SOUTHEAST TEXAS.

AT 1230 PM THE LEADING EDGE OF A LINE OF THUNDERSTORMS WAS LOCATED
FROM NEAR ROMAYOR IN NORTHERN LIBERTY COUNTY EAST INTO NORTHERN
HARDIN COUNTY.  THIS LINE CONTINUED MOVING SOUTH-SOUTHEAST AT 35
MILES AN HOUR.  THE MAIN THREAT FROM THE STORMS WILL BE DAMAGING
WIND GUSTS...THOUGH LARGE HAIL REMAINS A SLIGHT RISK.  THE STORMS
WILL AFFECT EASTERN LIBERTY AND CHAMBERS COUNTY THROUGH 230 PM.

PEOPLE IN THE WATCH AREA SHOULD MONITOR LOCAL TELEVISION...RADIO...OR
NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS.
Local storm report, Aug 27, 12:42 PM CDT, 3 hours 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1242 PM CDT TUE AUG 27 2002

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1110 AM    5 E APPLE SPGS            TX   WIND DAMAGE
08/27/02   TRINITY                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
Special weather statement, Aug 27, 2:23 PM CDT, 2 hours 6 minutes before
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Special weather statement, Aug 27, 3:04 PM CDT, 1 hour 25 minutes before
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Local storm report, Aug 27, 4:18 PM CDT, 11 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 7:32 PM CDTSevere Thunderstorm WarningHGXChambers58 min
Aug 26, 7:37 PM CDTSpecial Marine WarningHGX53 min
Aug 26, 7:59 PM CDTSevere Thunderstorm WarningHGXGalveston61 min
Aug 26, 8:02 PM CDTSevere Thunderstorm WarningHGXPolk58 min
Aug 26, 8:12 PM CDTSevere Thunderstorm WarningHGXChambers63 min
Aug 26, 8:24 PM CDTSpecial Marine WarningHGX66 min
Aug 26, 8:30 PM CDTSevere Thunderstorm WarningHGXGalveston75 min
Aug 26, 8:52 PM CDTSevere Thunderstorm WarningHGXTrinity68 min
Aug 26, 9:09 PM CDTSevere Thunderstorm WarningHGXPolk3 hr
Aug 26, 9:27 PM CDTSpecial Marine WarningHGX2 hr
Aug 26, 9:27 PM CDTSpecial Marine WarningHGX2 hr
Aug 26, 11:34 PM CDTSevere Thunderstorm WarningHGXHouston116 min
Aug 27, 12:38 AM CDTSevere Thunderstorm WarningHGXHouston11 hr
Aug 27, 10:23 AM CDTSevere Thunderstorm WarningHGXHouston97 min
Aug 27, 10:59 AM CDTSevere Thunderstorm WarningHGXTrinity76 min
Aug 27, 11:11 AM CDTSevere Thunderstorm WarningHGXPolk3 hr
Aug 27, 1:03 PM CDTSpecial Marine WarningHGX117 min
Aug 27, 1:18 PM CDTSevere Thunderstorm WarningHGXChambers, Liberty57 min
Aug 27, 1:34 PM CDTSevere Thunderstorm WarningHGXHarris86 min
Aug 27, 2:20 PM CDTSevere Thunderstorm WarningHGXGalveston, Harris115 min
Aug 27, 2:53 PM CDTSpecial Marine WarningHGX67 min
Aug 27, 3:31 PM CDTSevere Thunderstorm WarningHGXBrazoria119 min
Aug 27, 3:44 PM CDTSpecial Marine WarningHGX2 hr
Aug 27, 4:36 PM CDTSpecial Marine WarningHGX114 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002

Sources

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