Alert archive / Texas / Tornado Warnings in 2001
Tornado Warning 18, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Aug 30, 2001, 9:07 PM CDT for Chambers County, Texas. It was in force for 38 min. No storm report in the archive falls 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.
The facts
- Issued
- Aug 30, 2001, 9:07 PM CDT (02:07 UTC)
- Expired
- Aug 30, 2001, 9:45 PM CDT
- In force
- 38 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Chambers County, TX
The radar
The Houston radar (KHGX), 58 km from the middle of the area, began a volume at 02:11 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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.1 hours before the alert went out and 138 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
- 492 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
668 WFUS54 KHGX 310208 TORHOU TXC071-310245- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 907 PM CDT THU AUG 30 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * TORNADO WARNING FOR... CHAMBERS COUNTY IN SOUTHEAST TEXAS * UNTIL 945 PM CDT * AT 905 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER CHAMBERS COUNTY...MOVING NORTH AT 15 MPH. * LOCATIONS IN THE PATH OF THE TORNADO INCLUDE... HANKAMER RURAL CHAMBERS COUNTY BETWEEN ANAHUAC AND WINNIE INTERSTATE 10 BETWEEN HANKAMER AND WINNIE TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU SEE OR HEAR THE TORNADO - TAKE COVER NOW 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 2966 9468 2961 9447 2989 9438 2989 9462
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Aug 30, 8:52 PM CDT, 15 minutes earlier.
Area forecast discussion, Aug 30, 8:52 PM CDT, 15 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
852 PM CDT THU AUG 30 2001
FORECAST PROBLEM OF THE NIGHT CONTINUES TO BE EXTENT AND AMOUNT OF
RAINFALL. 00Z SURFACE ANALYSIS SHOWED A SURFACE TROUGH ALONG AND
JUST OFFSHORE OF THE UPPER TEXAS COAST. 00Z SOUNDINGS SHOW PW/S 2.1
TO 2.5 INCHES...850 MB DEWPOINTS OF 16 TO 18 CELSIUS...AND 700 MB
DEWPOINTS OF 4 TO 7 CELSIUS. WATER VAPOR INDICATED A SHORTWAVE
TROUGH MOVING IN FROM THE WEST WHILE THE UPPER CHARTS AT 00Z SHOWED
GOOD DIFFLUENCE OVER THE AREA. IR AND RADAR SHOWED THAT
REDEVELOPMENT WAS OCCURRING RIGHT OVER SE TX. THE 00Z SOUNDINGS ALSO
INDICATE A SEVERE WEATHER THREAT. WILL MENTION A CHANCE OF SEVERE
STORMS IN THE COASTAL COUNTIES WHERE THE GREATEST THREAT APPEARS TO
BE.
THE RAINFALL SHOULD CONTINUE AND WILL KEEP THE FLASH FLOOD WATCH IN
EFFECT FOR TONIGHT AND EXTEND IT INTO FRIDAY. THE THINKING HERE IS
THAT THE GREATEST THREAT WILL BE ACROSS THE SOUTHERN THIRD.
PL-40
31
.HGX...FFA ALL CWA TONIGHT AND FRIDAY.
SCEC 00 TO 20 NM HIGH ISLAND TO THE MATAGORDA SHIP CHANNEL.The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:05 PM CDT | Tornado Warning | HGX | Liberty | 25 min |
| Aug 30, 7:32 PM CDT | Tornado Warning | HGX | Chambers, Galveston | 43 min |
| Aug 30, 7:49 PM CDT | Tornado Warning | HGX | Brazoria, Galveston | 41 min |
| Aug 30, 8:20 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Galveston, Harris | 6 hr |
| Aug 30, 8:25 PM CDT | Tornado Warning | HGX | Chambers | 35 min |
| Aug 30, 8:45 PM CDT | Tornado Warning | HGX | Brazoria | 45 min |
| Aug 30, 9:35 PM CDT | Tornado Warning | HGX | Chambers | 40 min |
| Aug 30, 10:55 PM CDT | Flash Flood Warning | HGX | Jackson, Wharton | 6 hr |
| Aug 31, 1:05 AM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Galveston, Harris | 6 hr |
| Aug 31, 3:45 AM CDT | Flash Flood Warning | HGX | Jackson, Wharton | 6 hr |
| Aug 31, 8:30 AM CDT | Flash Flood Warning | HGX | Colorado, Jackson, Matagorda, Wharton | 3 hr |
| Aug 31, 9:55 AM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend | 3 hr |
| Aug 31, 11:27 AM CDT | Flash Flood Warning | HGX | Jackson, Matagorda, Wharton | 3 hr |
| Aug 31, 1:00 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend | 3 hr |
| Aug 31, 1:52 PM CDT | Tornado Warning | HGX | Chambers | 23 min |
| Aug 31, 2:28 PM CDT | Flash Flood Warning | HGX | Jackson, Wharton | 92 min |
| Aug 31, 3:55 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Jackson, Wharton | 2 hr |
| Aug 31, 5:58 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Jackson, Wharton | 3 hr |
Nearby
Tornado Warnings in Texas, 2001Every tornado warning in 2001Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.