Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 20, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 30, 2002, 7:39 PM CST for Polk County, San Jacinto County, Texas. It was in force for 36 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Mar 30, 2002, 7:39 PM CST (01:39 UTC)
- Expired
- Mar 30, 2002, 8:15 PM CST
- In force
- 36 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
Counties Polk County, TX, San Jacinto County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 30, 7:54 PM CST | Hail 0.75 | Livingston, TX | Sheriff reported 3/4 inch hail along eastern shore of Lake Livingston at Onalaska and Blanchard, and also in Livingston. |
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.
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 30, 5:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.7 hours before the alert went out and 192 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
- 2027 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS54 KHGX 310139
SVRHOU
TXC373-407-310215-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
739 PM CST SAT MAR 30 2002
THE NATIONAL WEATHER SERVICE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
POLK COUNTY IN SOUTHEAST TEXAS
SAN JACINTO COUNTY IN SOUTHEAST TEXAS
* UNTIL 815 PM CST
* AT 729 PM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER
COLDSPRING...MOVING NORTHEAST AT 40 MPH.
* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
COLDSPRING...GOODRICH
LIVINGSTON...ONALASKA
LARGE HAIL IS LIKELY WITH THIS STORM.
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 3064 9529 3051 9513 3070 9477 3082 9495
3092 9509What 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 30, 5:30 PM CST, 2 hours 9 minutes earlier.
Area forecast discussion, Mar 30, 5:30 PM CST, 2 hours 9 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...UPDATED FOR NEW TORNADO WATCH
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
530 PM CST SAT MAR 30 2002
TORNADO WATCH 60 HAS BEEN ISSUED UNTIL 1100 PM CST FOR MUCH OF
NORTHERN AND EASTERN SOUTHEAST TEXAS. THIS WATCH REPLACES TORNADO
WATCH 57. SEVERE THUNDERSTORM WATCH 59 IS STILL IN EFFECT FOR
SOUTHERN AND COASTAL COUNTIES OF SOUTHEAST TEXAS UNTIL 900 PM CST.
SEE THE UPDATED SPSHOU FOR COUNTY DETAILS.
42/35/30/36/45/DH/WT
.HGX...SEVERE THUNDERSTORM WATCH 59 THRU 9 PM.
TORNADO WATCH 60 THRU 11 PM.
SCEC 00-20 NM WATERS.
SCA 00-60 NM WATERS.
PRELIMS...
CLL BU 055/072 048/075 055 6-0
IAH BU 059/076 051/076 056 6-0
GLS BU 065/074 058/072 061 5-0
--------------------------------------------------------------------
.PREVIOUS DISCUSSION...
SEVERE WEATHER THREAT WILL PERSIST ACROSS SOUTHEAST TEXAS FOR THE
REMAINING AFTERNOON HOURS AND ON INTO THIS EVENING. UPPER LOW IS NOW
MOVING INTO CENTRAL TEXAS. STRONG DIFLUENT PATTERN WILL CONTINUE
ACROSS THE AREA AS SPEED MAX ROTATES AROUND THE BASE OF THE LOW.
TORNADIC THUNDERSTORMS HAVE BEEN JUST OUTSIDE OUR CWAS NORTHWEST
ZONES. THESE STORMS SHOULD BEGIN TO SPREAD TO THE EAST AND INTO OUR
CWA DURING THE NEXT FEW HOURS AS THE UPPER LOW GETS CLOSER INTO OUR
VERY MOIST...VERY WARM AND UNSTABLE ATMOSPHERE. WILL CONTINUE THE
SEVERE THREAT ON INTO THE EVENING HOURS WITH THE NORTHERN HALF OF
OUR CWA (AREAS NEAR AND NORTH OF INTERSTATE 10) AT GREATEST RISK. BY
TOMORROW MORNING...EXPECT QUIET PATTERN TO SETTLE IN TO THE AREA AS
THE STORM SYSTEM PROGRESSES OFF TO THE EAST. WILL HAVE SOME DRY
WEATHER THROUGH TUESDAY...THEN WILL SEE SOME SHOWERS/THUNDERSTORMS
ON WEDNESDAY AS THE NEXT COLD FRONT MOVES INTO THE AREA FROM THE
NORTH. A COOLDOWN WILL FOLLOW FOR THE LAST PART OF THE WEEK AS
SHOWER/THUNDERSTORM CHANCES LINGER ACROSS THE AREA. WE MAY EVEN HAVE
TO EVENTUALLY LOWER THE FORECAST TEMPERATURES FOR THE END OF THE
WEEK AS SOME CANADIAN AIR FILTERS INTO THE AREA. PRELIMS ARE NEXT.
42/35/30
.HGX...SEVERE THUNDERSTORM WATCH TXZ210-226-227-235>238 THRU
9 PM.
TORNADO WATCH TXZ163-164-176>179-195>200-211>214 THRU
6 PM.
SCEC 00-20 NM WATERS.
SCA 00-60 NM WATERS.
PRELIMS...
CLL BU 055/072 048/075 055 6-0
IAH BU 059/076 051/076 056 6-0
GLS BU 065/074 058/072 061 5-0In the hours before
Special weather statement, Mar 30, 3:45 PM CST, 3 hours 54 minutes before
TXZ210-226-227-235>238-310300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 345 PM CST SAT MAR 30 2002 ...SEVERE THUNDERSTORM WATCH ISSUED FOR THE SOUTHERN THIRD OF SOUTHEAST TEXAS UNTIL 9 PM... ...TORNADO WATCH REMAINS IN EFFECT FOR THE NORTHERN TWO THIRDS OF SOUTHEAST TEXAS UNTIL 6 PM... THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR THE SOUTHERN THIRD OF SOUTHEAST TEXAS UNTIL 9 PM. THIS WATCH COVERS THAT AREA SOUTH OF THE TORNADO WATCH ALREADY IN EFFECT. THE SEVERE THUNDERSTORM WATCH IS IN EFFECT SOUTH OF A LINE FROM BELLVILLE TO HOUSTON TO ANAHUAC...WITH THE TORNADO WATCH REMAINING IN EFFECT NORTH OF THIS LINE. THE FOLLOWING COUNTIES ARE IN THE SEVERE THUNDERSTORM WATCH... COLORADO...FORT BEND...GALVESTON...WHARTON...JACKSON...MATAGORDA... BRAZORIA. SOME COMMUNITIES INCLUDED IN THE SEVERE THUNDERSTORM WATCH ARE COLUMBUS...RICHMOND ROSENBERG...GALVESTON...EL CAMPO...EDNA...BAY CITY...AND LAKE JACKSON. A LINE OF THUNDERSTORMS ASSOCIATED WITH AN UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE WATCH AREA OVER THE NEXT FEW HOURS. SOME OF THE STORMS MAY BECOME SEVERE. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS TO PRODUCE DAMAGING WIND GUSTS AND LARGE HAIL. A SEVERE THUNDERSTORM OR TORNADO WARNING IS ISSUED WHEN SEVERE WEATHER IS IMMINENT OR OCCURRING. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR ADDITIONAL UPDATES AND POSSIBLE WARNINGS. IF YOU ARE IN THE PATH OF A SEVERE THUNDERSTORM...MOVE INSIDE TO A REINFORCED STRUCTURE AND STAY AWAY FROM WINDOWS.
Special weather statement, Mar 30, 5:30 PM CST, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 530 PM CST SAT MAR 30 2002 TXZ163-164-176>179-199-200-213-214-310500- CHAMBERS-HARRIS-HOUSTON-LIBERTY-MADISON-MONTGOMERY-POLK-SAN JACINTO- TRINITY-WALKER- 530 PM CST SAT MAR 30 2002 ...TORNADO WATCH EXTENDED UNTIL 11 PM FOR THE EASTERN THIRD OF SOUTHEAST TEXAS... THE STORM PREDICTION CENTER HAS EXTENDED THE TORNADO WATCH FOR THE EASTERN THIRD OF SOUTHEAST TEXAS UNTIL 11 PM. THE TORNADO WATCH IS IN EFFECT EAST OF A LINE FROM MADISONVILLE TO HOUSTON TO ANAHUAC. THE FOLLOWING COUNTIES ARE IN THE TORNADO WATCH... MADISON...HOUSTON...WALKER...TRINITY...POLK...SAN JACINTO...MONTGOMERY...HARRIS...LIBERTY...AND CHAMBERS SOME COMMUNITIES INCLUDED IN THE TORNADO WATCH ARE MADISONVILLE...CROCKETT...HUNTSVILLE...GROVETON...LIVINGSTON... COLDSPRING...CONROE...HOUSTON...LIBERTY...AND ANAHUAC. A LINE OF STRONG TO SEVERE THUNDERSTORMS ASSOCIATED WITH AN UPPER LEVEL DISTURBANCE IS MOVING ACROSS THE AREA AT THE PRESENT TIME. THESE STORMS HAVE HAD A HISTORY OF PRODUCING LARGE HAIL AND DAMAGING WINDS. A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS TO PRODUCE TORNADOES...DAMAGING WIND GUSTS AND LARGE HAIL. A SEVERE THUNDERSTORM OR TORNADO WARNING IS ISSUED WHEN SEVERE WEATHER IS IMMINENT OR OCCURRING. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR ADDITIONAL UPDATES AND POSSIBLE WARNINGS. IF YOU ARE IN THE PATH OF A SEVERE THUNDERSTORM...MOVE INSIDE TO A REINFORCED STRUCTURE AND STAY AWAY FROM WINDOWS. TXZ226-227-235>238-310500- BRAZORIA-FORT BEND-GALVESTON-JACKSON-MATAGORDA-WHARTON- 530 PM CST SAT MAR 30 2002 ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 PM FOR THE SOUTHERN THIRD OF SOUTHEAST TEXAS... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT SOUTH OF A LINE FROM EDNA TO HOUSTON TO ANAHUAC THROUGH 9 PM. THE FOLLOWING COUNTIES ARE IN THE SEVERE THUNDERSTORM WATCH... JACKSON...WHARTON...FORT BEND...MATAGORDA...BRAZORIA...WHARTON...AND GALVESTON SOME COMMUNITIES INCLUDED IN THE SEVERE THUNDERSTORM WATCH ARE EDNA...EL CAMPO...RICHMOND ROSENBERG...BAY CITY...LAKE JACKSON...AND GALVESTON. A LINE OF STRONG TO SEVERE THUNDERSTORMS ASSOCIATED WITH AN UPPER LEVEL DISTURBANCE IS MOVING ACROSS THE AREA AT THE PRESENT TIME. THESE STORMS HAVE HAD A HISTORY OF PRODUCING LARGE HAIL AND DAMAGING WINDS. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS TO PRODUCE DAMAGING WIND GUSTS AND LARGE HAIL. A SEVERE THUNDERSTORM OR TORNADO WARNING IS ISSUED WHEN SEVERE WEATHER IS IMMINENT OR OCCURRING. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR ADDITIONAL UPDATES AND POSSIBLE WARNINGS. IF YOU ARE IN THE PATH OF A SEVERE THUNDERSTORM...MOVE INSIDE TO A REINFORCED STRUCTURE AND STAY AWAY FROM WINDOWS.
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, 7:47 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 | |
| Mar 31, 3:02 AM CST | Severe Thunderstorm Warning | HGX | Trinity | 13 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.