Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 22, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 31, 2002, 3:02 AM CST for Trinity County, Texas. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2002, 3:02 AM CST (09:02 UTC)
- Expired
- Mar 31, 2002, 3:15 AM CST
- In force
- 13 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Trinity County, TX
The radar
The Shreveport radar (KSHV), 178 km from the middle of the area, began a volume at 09:03 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 9.0 hours before the alert went out and 186 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
- 7 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 454 m above ground
- 0-6 km bulk shear
- 79 kt
- 0-1 km storm-relative helicity
- 370 m²/s²
- 0-3 km storm-relative helicity
- 459 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
184 WUUS54 KHGX 310902 SVRHOU TXC455-310915- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 301 AM CST SUN MAR 31 2002 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... TRINITY COUNTY IN SOUTHEAST TEXAS * UNTIL 315 AM CST * AT 254 AM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES WEST OF APPLE SPRINGS...MOVING NORTHEAST AT 25 MPH. THIS STORM WILL LIKELY PRODUCE DIME TO NICKEL SIZE HAIL. * LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... APPLE SPRINGS 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 3117 9517 3113 9505 3128 9487 3133 9496
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 Mar 31, 2:25 AM CST, 37 minutes earlier.
Area forecast discussion, Mar 31, 2:25 AM CST, 37 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 225 AM CST SUN MAR 31 2002 QUITE A NIGHT LAST NIGHT. NUMEROUS REPORTS OF LARGE HAIL AND WIND DAMAGE. HOPE TO HAVE THE LSR OUT BY 5 AM. LOW CLOUDS AND FOG TO PREVAIL THIS MORNING UNTIL WEAK FRONTAL BOUNDARY FINALLY PUSHES THROUGH. DRIER AIR LURKING BEHIND THIS FEATURE SHOULD PROVIDE THE REGION WITH SLIGHTLY COOLER TEMPS AND LOWER RH. AT 07Z...SFC LOW PRESSURE WAS LOCATED NEAR IAH WITH A TROF EXTENDING FROM THE LOW TOWARD BRO. THE 50H LOW WHICH BROUGHT SO MUCH CHAOS TO THE STATE IS SPINNING NEAR GGG. ETA IS MORE AGGRESSIVE WITH LOW LEVEL MOISTURE TODAY KEEPING 70 PERCENT RH TRAPPED BELOW 900 MB. AVN IS DRIER. THINK PTLY CLDY CAN COVER THINGS AS CLOUDS THIS MORNING GIVE WAY TO SUNSHINE. CANT FIND MUCH TO TALK ABOUT FOR MON. SOME INCREASE IN CLOUDS FOR TUESDAY AS ONSHORE WINDS RETURN. WED LOOKS A LITTLE UNSETTLED AS A WEAK FRONT CROSSES THE AREA ON WED OR WED NIGHT. DOWN THE ROAD...ECMWF HOLDS AN UPPER LOW OVER BAJA WHILE THE UKMET EJECTS THE LOW TOWARD TEXAS AS AN OPEN TROUGH.THE CANADIAN MODEL ALSO HOLDS THE LOW BACK TOWARD BAJA AND BUILDS A WEAK UPPER RIDGE OVER THE REGION. MRF FAVORS THE UKMET IN BRINGING THIS SYSTEM OUT AS AN OPEN WAVE. HAVE FAVORED THE WETTER UKMET/MRF SOLN. .HGX...NONE. 43/41 PRELIMS... CLL BU 073/048 079/055 083 000 IAH BU 075/051 079/056 083 000 GLS BU 073/057 074/064 076 000
In the hours before
Special weather statement, Mar 30, 9:15 PM CST, 5 hours 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 915 PM CST SAT MAR 30 2002 TXZ163-164-176>179-199-200-213-214-310430- CHAMBERS-HARRIS-HOUSTON-LIBERTY-MADISON-MONTGOMERY-POLK-SAN JACINTO- TRINITY-WALKER- 915 PM CST SAT MAR 30 2002 ...TORNADO WATCH FOR THE EASTERN THIRD OF SOUTHEAST TEXAS HAS BEEN CANCELLED... THE TORNADO WATCH IN EFFECT EARLIER FOR THE EASTERN THIRD OF SOUTHEAST TEXAS HAS BEEN CANCELLED. SHOWERS AND THUNDERSTORMS WILL LINGER ACROSS SOUTHEAST TEXAS FOR THE NEXT FEW HOURS...BUT THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE NIGHT. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR ADDITIONAL UPDATES. TXZ226-227-235>238-310430- BRAZORIA-FORT BEND-GALVESTON-JACKSON-MATAGORDA-WHARTON- 915 PM CST SAT MAR 30 2002 ...THE SEVERE THUNDERSTORM WATCH FOR THE SOUTHERN THIRD OF SOUTHEAST TEXAS HAS EXPIRED... THE SEVERE THUNDERSTORM WATCH ISSUED EARLIER FOR THE SOUTHERN THIRD OF SOUTHEAST TEXAS HAS EXPIRED. SHOWERS AND THUNDERSTORMS WILL LINGER ACROSS SOUTHEAST TEXAS FOR THE NEXT FEW HOURS...BUT THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE NIGHT. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR ADDITIONAL UPDATES.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 6:04 PM CST | Tornado Warning | HGX | Matagorda, Wharton | 41 min |
| Mar 30, 6:22 PM CST | Severe Thunderstorm Warning | HGX | Polk, Trinity | 38 min |
| Mar 30, 6:31 PM CST | Severe Thunderstorm Warning | HGX | Harris | 59 min |
| Mar 30, 6:33 PM CST | Tornado Warning | HGX | Polk | 27 min |
| Mar 30, 6:48 PM CST | Tornado Warning | HGX | Brazoria, Fort Bend, Matagorda | 57 min |
| Mar 30, 7:01 PM CST | Tornado Warning | HGX | Polk, Trinity | 29 min |
| Mar 30, 7:23 PM CST | Severe Thunderstorm Warning | HGX | Harris, Liberty | 37 min |
| Mar 30, 7:39 PM CST | Severe Thunderstorm Warning | HGX | Polk, San Jacinto | 36 min |
| Mar 30, 7:47 PM CST | Tornado Warning | HGX | Chambers, Galveston, Harris | 43 min |
| Mar 30, 7:54 PM CST | Special Marine Warning | HGX | 66 min | |
| Mar 30, 8:01 PM CST | Tornado Warning | HGX | Liberty | 29 min |
| Mar 30, 8:32 PM CST | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 43 min |
| Mar 30, 9:08 PM CST | Special Marine Warning | HGX | 67 min | |
| Mar 30, 10:17 PM CST | Special Marine Warning | HGX | 58 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.