Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 69, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 12, 2001, 6:53 PM CDT for Liberty County, Texas. It was in force for 52 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 12, 2001, 6:53 PM CDT (23:53 UTC)
- Expired
- May 12, 2001, 7:45 PM CDT
- In force
- 52 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Liberty County, TX
The radar
The Houston radar (KHGX), 82 km from the middle of the area, began a volume at 23:56 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 12, 7:15 PM CDT | Hail 0.75 | Hardin, 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, 11.9 hours before the alert went out and 154 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
- 1266 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 619 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KHGX 122354 SVRHOU TXC291-130045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 653 PM CDT SAT MAY 12 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LIBERTY COUNTY IN SOUTHEAST TEXAS * UNTIL 745 PM CDT * AT 651 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTHEAST OF MOSS HILL...MOVING SOUTHWEST AT 10 MPH. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... MOSS HILL DAISETTA HARDIN DAYTON LAKES...KENEFICK...LIBERTY...AMES 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 3015 9496 2997 9478 3011 9460 3045 9470
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 12, 3:10 PM CDT, 3 hours 43 minutes earlier.
Area forecast discussion, May 12, 3:10 PM CDT, 3 hours 43 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 310 PM CDT SAT MAY 12 2001 STRONG CONVECTION ALONG THE SEABREEZE SEEMS TO BE WEAKENING AS IT MOVES INLAND THIS AFTERNOON. IT APPEARS THAT THE DEEP NE/ELY FLOW IS WINNING OUT. HOWEVER...GIVEN THE ABUNDANCE OF BOUNDARIES (OUT- FLOW AND OTHERWISE) WILL LIKELY KEEP SOME LOW POPS IN FOR TONIGHT. SOME DIFFERENCES NOTED IN THE PROGS FOR TOMORROW WITH THE AVN/NGM HOLDING ON TO THE RAIN. ATTM FAVORING THE DRIER ETA. THE THINKING IS THAT WIDESPREAD SH/TSRA DEVELOPMENT SHOULD BE LIMITED WITH THE AXIS OF THE RIDGE ATOP OF TX AND THE DEEP (ALBEIT LIGHT) ENE FLOW WORKING ALL THE WAY DOWN TO THE SFC. MAY LEyAVE SOME 20S IN AT THE SRN/CENTRAL ZONES TO ACCOUNT FOR THE SEABREEZE/ENHANCED LOW LEVEL CONVERGENCE. 41/45 .HGX...NONE. PRELIMS... CLL EB 063/086 063/087 210 IAH BB 064/086 064/086 32- GLS BB 071/082 071/082 421
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.