Alert archive / Texas / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 55, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 7, 2003, 4:43 PM CDT for Chambers County, Texas. It was in force for 32 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
- Apr 7, 2003, 4:43 PM CDT (21:43 UTC)
- Expired
- Apr 7, 2003, 5:15 PM CDT
- In force
- 32 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Chambers County, TX
The radar
The Houston radar (KHGX), 61 km from the middle of the area, began a volume at 21:43 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 7, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.7 hours before the alert went out and 136 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
- 1791 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -64 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- -0.6
- Supercell composite
- -2.0
The text
As transmitted, in the capitals the NWS used until 2016.
270
WUUS54 KHGX 072143
SVRHOU
TXC071-072215-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
442 PM CDT MON APR 7 2003
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CHAMBERS COUNTY IN SOUTHEAST TEXAS
* UNTIL 515 PM CDT
* AT 438 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER
TRINITY BAY ABOUT 4 MILES SOUTHWEST OF ANAHUAC...MOVING EAST AT 35
MPH.
* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
OAK ISLAND
ANAHUAC...WALLISVILLE
HANKAMER
WINNIE...STOWELL
INTERSTATE 10 BETWEEN MONT BELVIEU...HANKAMER...AND WINNIE
THIS STORM HAS HAD A HISTORY OF PRODUCING LARGE HAIL.
MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. THIS STORM MAY PRODUCE LARGE DAMAGING HAIL...RESULTING IN
EXTENSIVE PROPERTY DAMAGE OR SERIOUS INJURY. AVOID WINDOWS AND TAKE
COVER NOW
DRIVERS MAY ENCOUNTER DAMAGING HAIL...STRONG WINDS AND BLINDING RAIN.
PULL OVER TO A STRONG SHELTER NOW. BRIDGES AND OVERPASSES ARE NOT
SAFE
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 2990 9438 2963 9437 2959 9474 2979 9485
2989 9460
$$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 Apr 7, 4:40 PM CDT, 3 minutes earlier.
Area forecast discussion, Apr 7, 4:40 PM CDT, 3 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 440 PM CDT MON APR 7 2003 WILL UPDATE ZONES AGAIN. REMOVE SEVERE WATCH #113 THAT WAS PREVIOUSLY IN EFFECT TILL 6 PM. 47 .HGX...SEVERE THUNDERSTORM WATCH #114 TIL 9 PM FOR BRAZORIA... FORT BEND...HARRIS...MONTGOMERY...LIBERTY...CHAMBERS...AND GALVESTON COUNTIES. FLASH FLOOD WATCH TIL 6 AM FOR LIBERTY...HARRIS...CHAMBERS... GALVESTON...BRAZORIA...FORT BEND...MATAGORDA...JACKSON... WHARTON...COLORADO...AUSTIN...AND WALLER COUNTIES. PRELIM NUMBERS... CLL NV 053/064 036/066 037 820 IAH NV 055/064 038/067 037 930 GLS NV 059/066 045/064 049 930
Hazardous weather outlook, Apr 7, 9:35 AM CDT, 7 hours 8 minutes before
GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-081200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 935 AM CDT MON APR 7 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS. ...SEVERE THUNDERSTORMS POSSIBLE LATE THIS AFTERNOON AND THIS EVENING OVER SOUTHEAST TEXAS... .DAY ONE...THIS AFTERNOON AND TONIGHT. A SLOW MOVING COLD FRONT WILL COMBINE WITH VERY MOIST AIR TO HELP DEVELOP SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND TONIGHT. THE COLD FRONT IS EXPECTED TO REACH THE COAST BETWEEN 3 AND 6 AM. ISOLATED THUNDERSTORMS ARE LIKELY THIS AFTERNOON...AND STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE LATER TONIGHT. IT APPEARS THE GREATEST THREAT WILL BE FROM HAIL AND STRONG WINDS IN CENTRAL AND SOUTHERN PARTS OF THE AREA. ISOLATED RAINFALL AMOUNTS OF AROUND 1 INCH MAY ACCOMPANY THE STORMS AS WELL. SPOTTER ACTIVATION MAY BE NEEDED LATER TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. BREEZY TO WINDY CONDITIONS EXPECTED TUESDAY AND WEDNESDAY. WIND ADVISORIES MAY BE NEEDED. NORTH WINDS BEHIND THE COLD FRONT WILL STRENGTHEN QUICKLY TUESDAY MORNING. SUSTAINED WINDS OF 25 MPH WITH HIGHER GUSTS ARE LIKELY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
In the hours before
Special weather statement, Apr 7, 1:17 PM CDT, 3 hours 26 minutes before
TXZ178-179-197>199-210>213-226-227-235>237-072300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 117 PM CDT MON APR 7 2003 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 6 PM FOR MUCH OF SOUTHEAST TEXAS... AN AXIS OF INSTABILITY WHICH LIES ALONG COASTAL SECTIONS OF SOUTHEAST TEXAS AND THEN WESTWARD TOWARD DEL RIO WILL BE THE FOCUS FOR ADDITIONAL THUNDERSTORM ACTIVITY THIS AFTERNOON AND EVENING. THE PRIMARY SEVERE WEATHER THREAT IS LARGE HAIL. THE COUNTIES INCLUDED IN THIS SEVERE THUNDERSTORM WATCH ARE: AUSTIN...BRAZORIA...COLORADO...FORT BEND...GRIMES...HARRIS... JACKSON...MATAGORDA...MONTGOMERY...POLK...SAN JACINTO...WALLER... WASHINGTON AND WHARTON. PERSONS IN OR NEAR THESE COUNTIES SHOULD KEEP A LOOK OUT FOR RAPIDLY CHANGING WEATHER CONDITIONS THIS AFTERNOON. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
Special weather statement, Apr 7, 1:26 PM CDT, 3 hours 17 minutes before
TXZ178-179-197>199-210>213-226-227-235>237-072300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 126 PM CDT MON APR 7 2003 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 6 PM FOR MUCH OF SOUTHEAST TEXAS... AN AXIS OF INSTABILITY WHICH LIES ALONG COASTAL SECTIONS OF SOUTHEAST TEXAS AND THEN WESTWARD TOWARD DEL RIO WILL BE THE FOCUS FOR ADDITIONAL THUNDERSTORM ACTIVITY THIS AFTERNOON AND EVENING. THE PRIMARY SEVERE WEATHER THREAT IS LARGE HAIL. THE COUNTIES INCLUDED IN THIS SEVERE THUNDERSTORM WATCH ARE: AUSTIN...BRAZORIA...COLORADO...FORT BEND...GRIMES...HARRIS... JACKSON...MATAGORDA...MONTGOMERY...POLK...SAN JACINTO...WALLER... WASHINGTON AND WHARTON. PERSONS IN OR NEAR THESE COUNTIES SHOULD KEEP A LOOK OUT FOR RAPIDLY CHANGING WEATHER CONDITIONS THIS AFTERNOON. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 9:24 AM CDT | Special Marine Warning | HGX | 66 min | |
| Apr 7, 9:48 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Galveston | 57 min |
| Apr 7, 9:49 AM CDT | Special Marine Warning | HGX | 56 min | |
| Apr 7, 10:49 AM CDT | Severe Thunderstorm Warning | HGX | Galveston, Harris | 41 min |
| Apr 7, 10:55 AM CDT | Special Marine Warning | HGX | 65 min | |
| Apr 7, 10:58 AM CDT | Special Marine Warning | HGX | 62 min | |
| Apr 7, 11:02 AM CDT | Severe Thunderstorm Warning | HGX | Chambers | 43 min |
| Apr 7, 11:54 AM CDT | Severe Thunderstorm Warning | HGX | Fort Bend, Harris | 36 min |
| Apr 7, 12:32 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris | 43 min |
| Apr 7, 1:16 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 44 min |
| Apr 7, 1:46 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Fort Bend, Wharton | 44 min |
| Apr 7, 2:31 PM CDT | Severe Thunderstorm Warning | HGX | Fort Bend, Harris | 59 min |
| Apr 7, 3:34 PM CDT | Severe Thunderstorm Warning | HGX | Fort Bend, Harris | 56 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003
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.