Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 76, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 25, 2001, 4:25 PM CDT for Matagorda County, Wharton County, Texas. It was in force for 50 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 25, 2001, 4:25 PM CDT (21:25 UTC)
- Expired
- May 25, 2001, 5:15 PM CDT
- In force
- 50 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Matagorda County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 95 km from the middle of the area, began a volume at 21:27 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
| Time | Report | Where | Remark |
|---|---|---|---|
| May 25, 4:45 PM CDT | Hail 0.75 | Bay City, TX |
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
Corpus Christi, TX (KCRP), launched 12:00Z, 9.4 hours before the alert went out and 206 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
- 1944 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 777 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -2.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KHGX 252127 SVRHOU TXC321-481-252215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 425 PM CDT FRI MAY 25 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WHARTON COUNTY IN SOUTHEAST TEXAS MATAGORDA COUNTY IN SOUTHEAST TEXAS * UNTIL 515 PM CDT * AT 422 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTHEAST WHARTON COUNTY AND NORTHEAST MATAGORDA COUNTY...ABOUT 5 MILES SOUTH OF BOLING...MOVING SLOWLY TO THE SOUTHEAST. THE MAIN THREAT FROM THIS STORM IS LARGE HAIL. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE... OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. LAT...LON 2927 9601 2913 9615 2900 9599 2915 9583
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 May 25, 3:00 PM CDT, 1 hour 25 minutes earlier.
Area forecast discussion, May 25, 3:00 PM CDT, 1 hour 25 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 300 PM CDT FRI MAY 25 2001 PARTLY CLOUDY OVER SERN TX EARLY THIS AFTERNOON. THE MAIN FORECAST ISSUES ARE POPS TONIGHT THROUGH SUN...TEMPS MON-TUE...POPS/TEMPS WED-FRI. THE 12Z NCEP MODELS ARE IN FAIR TO GOOD AGREEMENT...PREFER AN AVN/ETA BLEND...BUT MAV/FWC GUIDANCE ARE SIMILAR EXCEPT FOR POPS IN THE 2ND/3RD PERIODS. THE MEDIUM RANGE MODELS ARE IN LESS AGREEMENT...SO WILL TREND TOWARD CLIMATOLOGY. THE FRONT HAS STALLED AND WASHED OUT TO A FAIR DEGREE. MSAS PRESSURE TRENDS SHOW LOW PRESSURE DEVELOPING OVER THE TX PANHANDLE AS ADVERTISED IN THE MODELS. AGREE IN GENERAL WITH MODELS THAT FRONT WILL REINVIGORATE AND MOVE NORTH AS A WARM FRONT. AGREE WITH SPC/HPC THAT MAIN THREATS FOR HEAVY CONVECTION WILL BE NORTH OF OUR CWA. WILL MAINTAIN LOWISH POPS THROUGH SUN...SLIGHTLY HIGHER FOR ZONE GROUPS NEAR THE FRONT AS IT MOVES NORTH AND IN RELATION TO IMPULSES TRAVELLING IN THE FAST NW FLOW. ATTM DO NOT ANTICIPATE THE NEED FOR MENTION OF SEVERE IN THE FORECAST. WILL INTRODUCE SLIGHT CHANCE POPS FOR THU-FRI AS ANOTHER FRONT/TROUGH COMBO PUSH THROUGH THE PLAINS. TEMPS WILL BE A MAV/FWC BLEND IN THE SHORT TERM...MEX LOOK FINE FOR THE EXTENDED. NO FLAGS FOR THE MARINE FORECAST. .HGX...NONE. 31/40/WT PRELIMS... CLL BB 066/087 069/090 072 332 IAH BB 067/086 070/089 072 322 GLS BB 074/085 076/085 076 232
In the hours before
Local storm report, May 25, 2:57 PM CDT, 1 hour 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
257 PM CDT FRI MAY 25 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1100 AM 3 S MATAGORDA TX TORNADO
05/25/01 MATAGORDA REPORTED BY THE ARMY CORPS
ENGINEERS AND THE PUBLIC.
LARGE WATER SPOUT MOVED
EAST-SOUTHEAST FROM THE BAY TO A RESIDENTIAL AREA
NEAR FM-2031 ON THE THE MATAGORDA PENINSULA.The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 2:53 AM CDT | Severe Thunderstorm Warning | HGX | Waller | 52 min |
| May 25, 11:02 AM CDT | Tornado Warning | HGX | Matagorda | 28 min |
| May 25, 5:55 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend | 50 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; radar from the NEXRAD Level II archive.