Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 96, NWS Houston/Galveston, TX

June 21, 2001Brazos County, Burleson County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jun 21, 2001, 10:10 PM CDT for Brazos County, Burleson County, Texas. It was in force for 50 min. 1 report 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
Jun 21, 2001, 10:10 PM CDT (03:10 UTC)
Expired
Jun 21, 2001, 11:00 PM CDT
In force
50 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Brazos County, TX, Burleson County, TX

What was reported inside it

TimeReportWhereRemark
Jun 21, 10:30 PM CDTThunderstorm WindBryan, TXTrees uprooted and power lines down.

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

Fort Worth, TX (KFWD), launched 00:00Z, 3.2 hours before the alert went out and 263 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 00:00Z on 2001-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1175 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 00:00Z on 2001-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
1175 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
1188 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 21, 8:50 PM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, Jun 21, 8:50 PM CDT, 1 hour 20 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
850 PM CDT THU JUN 21 2001

REGIONAL 88DS AND IR IMAGERY SHOW A LINE OF SHOWERS AND
THUNDERSTORMS JUST NORTHWEST OF OUR CWA...MOVING SOUTH-SOUTHEAST.
THE MAIN FORECAST ISSUE IS THE THREAT FOR HEAVY RAIN. THE LINE IS
PROPAGATING IN AN ORDERLY FASHION...ALTHOUGH 3HR PRESSURE CHANGE
FIELDS INDICATE ONLY WEAK PRESSURE RISES BEHIND THE LINE AND LAGGING
COLD FRONT.

THE 00Z RAOBS...GOES SOUNDER...AND 21Z RUC AGREE ON PWS AROUND 1.5
INCHES AREAWIDE EXCEPT FOR POOLING TO NEAR 1.8 INCHES NEAR THE LINE
OF STORMS. WARM CLOUD DEPTH IS 3-3.5 KM...0-6 KM MEAN WINDS ARE
WEAK...AND STORM MOTION SLOW...POINTING TO A HEAVY RAIN THREAT.
RAINFALL FROM ALLISON MAKES THIS MORE CRITICAL THAN NORMAL SINCE
ADDITIONAL RAINFALL WILL PRIMARILY BE RUNOFF. HOWEVER...WITHOUT A
SUSTAINED MODERATE TO STRONG MOIST AIR FEED...LOSS OF DAYTIME
HEATING...AND PROGRESSION OF CURRENT LINE...WILL NOT ISSUE A FLASH
FLOOD WATCH.

WILL RETAIN MENTION OF HEAVY RAIN IN THE FORECAST AND LEAVE SPS/HWO
AS IS. WILL UPDATE TO CATEGORICAL POPS EXCEPT ALONG THE COAST
WITH RAIN TRENDING OUT FROM NORTH TO SOUTH AND FROM LATE TO TOWARD
MORNING.

.HGX...NONE.

31/40/DO

UPDATE PRELIMS...
CLL BU 069/089 065/091 068 +10  INCREASED POPS TONIGHT
IAH BU 071/090 067/091 069 930  DITTO
GLS EB 077/087 075/087 077 541  DITTO

In the hours before

Special weather statement, Jun 21, 4:15 PM CDT, 5 hours 55 minutes before
TXZ163-164-176>179-195>200-210>213-226-227-235-220900-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
415 PM CDT THU JUN 21 2001

...AREAS OF MODERATE TO HEAVY RAIN POSSIBLE INLAND TONIGHT...

A COLD FRONT WILL MOVE SOUTH ACROSS SOUTHEAST TEXAS TONIGHT. AS IT
APPROACHES THE AREA...IT WILL ENCOUNTER A MOIST AND UNSTABLE
AIRMASS. THIS WILL SET THE STAGE FOR SHOWERS AND THUNDERSTORMS.
BECAUSE STEERING CURRENTS IN THE ATMOSPHERE ARE LIGHT...THE
THUNDERSTORMS WILL MOVE SLOWLY...AND SOME WILL PRODUCE HEAVY RAIN.

THE FRONT WILL WEAKEN AS IT MOVES SOUTH. THEREFORE...IT APPEARS
AT THIS TIME THAT THE HEAVIEST RAINS WILL FALL ALONG AND NORTH OF A
LINE FROM LAKE LIVINGSTON TO COLUMBUS. 1 TO 3 INCHES OF RAIN IS
POSSIBLE IN THIS AREA. THIS COULD PRODUCE HIGH STANDING WATER IN AREAS
OF POOR DRAINAGE AND COULD BRING SOME SMALL STREAMS AND CREEKS TO
NEAR BANKFULL.

FURTHER SOUTH IN SPOTS SUCH AS LIBERTY...METRO HOUSTON AND WHARTON...
AMOUNTS SHOULD BE IN THE 1/2 TO ONE AND A HALF INCH RANGE...WITH
ISOLATED TOTALS TO 3 INCHES. THIS WILL NOT BE SUFFICIENT TO BRING THE
HOUSTON AREA BAYOU SYSTEM TO FLOOD LEVELS...BUT COULD PRODUCE HIGH
STANDING WATER ON LOW LYING STREETS AND FEEDER ROADS.

LOOK FOR SKIES TO GRADUALLY CLEAR FROM THE NORTH BEHIND THE FRONT
FRIDAY AND FRIDAY NIGHT. SLIGHTLY LOWER HUMIDITY LEVELS WILL ALSO
FOLLOW THE FRONT AND WILL REMAIN THROUGH SATURDAY.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 10:10 PM CDTSevere Thunderstorm WarningHGXGrimes50 min
Jun 21, 11:16 PM CDTSevere Thunderstorm WarningHGXSan Jacinto, Walker44 min
Jun 22, 1:32 AM CDTSevere Thunderstorm WarningHGXLiberty58 min
Jun 22, 5:36 PM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Matagorda, Wharton24 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001

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.