Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 89, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 31, 2001, 5:38 PM CDT for Grimes County, Texas. It was in force for 52 min. 2 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
- May 31, 2001, 5:38 PM CDT (22:38 UTC)
- Expired
- May 31, 2001, 6:30 PM CDT
- In force
- 52 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Grimes County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 6:00 PM CDT | Hail 0.75 | Cross, TX | |
| May 31, 6:25 PM CDT | Hail 0.75 | Roans Prairie, 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.6 hours before the alert went out and 271 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
- 3019 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 531 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KHGX 312247 SVRHOU TXC185-312330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 538 PM CDT THU MAY 31 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... GRIMES COUNTY IN SOUTHEAST TEXAS * UNTIL 630 PM CDT * AT 545 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTH OF IOLA...MOVING SOUTH AT 20 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... IOLA CROSS GIBBONS CREEK RESERVOIR CARLOS MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS! THE STORM WILL PRODUCE HAIL IN EXCESS OF AN INCH IN DIAMETER AND POSSIBLY DAMAGING WIND GUSTS. THE STORM PRODUCED GOLFBALL SIZED HAIL EARLIER OVER LEON COUNTY. PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE... OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT T6O THE NATIONAL WEATHER SERVICE.
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 31, 2:15 PM CDT, 3 hours 23 minutes earlier.
Area forecast discussion, May 31, 2:15 PM CDT, 3 hours 23 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION ...COR PRELIMS NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 215 PM CDT THU MAY 31 2001 WET MESS ACROSS THE AREA TODAY...WITH A MAJORITY OF THE PRECIP FALLING OVER THE SE 1/2 OF THE FA. A SECOND AREA OF RAINFALL WITH STRONG THUNDERSTORMS ARE CLUSTERING/BACKBUILDING ALONG THE NEARLY STATIONARY OUTFLOW BOUNDARY IN OUR NE ZONES. WS-ETA INDICATES THIS N AND NE AREA WILL REMAIN UNDER THE GUN WITH STRONG LATE AFTERNOON DIFFERENTIAL HEATING AS THE DRIVER. THE MID-LEVEL CIRCULATION THAT IS PUSHING THE LINE OF STORMS INTO THE GULF SHOULD TRACK THROUGH THE REMAINDER OF THE FA AND GRADUALLY END THE THREAT OF RAIN FOR TONIGHT (EXCEPT UP NORTH). FRONT NEAR FTW WILL DRIFT SLOWLY SOUTH AND SHOULD BE OVER THE NORTHERN FA BY MORNING. WILL PROBABLY GET SOME PATCHY FOG...ESPECIALLY OVER THE AREAS THAT SAW A LOT OF RAIN TODAY (AND POSSIBLY CLEAR SKIES TONIGHT). AS THE ATMOSPHERE WILL PROBABLY HAVE BEEN SCOURED OUT...DO NOT FORESEE MUCH OF A THREAT ON FRIDAY BUT WILL PROBABLY KEEP A 20 POP IN FOR DAYTIME HEATING/LINGERING MESOSCALE BOUNDARIES. FRONTOLYSIS SHOULD DECIMATE THE FRONTAL BOUNDARY SATURDAY...ANOTHER COLD FRONT DROPPING SOUTH THROUGH THE PLAINS SHOULD BE NEARING THE RED RIVER REGION BY EARLY SATURDAY NIGHT THEN RACING BACK NORTH SUNDAY MORNING (PER AVN). S/W ROTATING AROUND THE UPPER TROUGH TUESDAY SHOULD HELP PUSH A FRONT INTO THE NORTHERN FA ON TUESDAY SO AM ANTICIPATING CHANCE POPS TUESDAY AND WEDNESDAY. 45/41/48 .HGX...NONE. PRELIMS... CLL BB 067/093 070/093 074 321 IAH BB 070/091 071/092 074 121 GLS BB 073/085 076/086 076 -21 NE BB 064/090 069/091 072 422
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 4:59 PM CDT | Severe Thunderstorm Warning | HGX | Madison | 46 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.