Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 96, NWS Houston/Galveston, TX
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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 10:30 PM CDT | Thunderstorm Wind | Bryan, TX | Trees 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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 10:10 PM CDT | Severe Thunderstorm Warning | HGX | Grimes | 50 min |
| Jun 21, 11:16 PM CDT | Severe Thunderstorm Warning | HGX | San Jacinto, Walker | 44 min |
| Jun 22, 1:32 AM CDT | Severe Thunderstorm Warning | HGX | Liberty | 58 min |
| Jun 22, 5:36 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend, Matagorda, Wharton | 24 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.