Alert archive / Texas / Tornado Warnings in 2001
Tornado Warning 20, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Aug 31, 2001, 1:52 PM CDT for Chambers County, Texas. It was in force for 23 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
- Aug 31, 2001, 1:52 PM CDT (18:52 UTC)
- Expired
- Aug 31, 2001, 2:15 PM CDT
- In force
- 23 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), 63 km from the middle of the area, began a volume at 18:52 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 |
|---|---|---|---|
| Aug 31, 1:56 PM CDT | Tornado F0 | Monroe City, TX | Tornado near Highway 65 between Monroe City and Winnie. Law enforcement reported no damage or injuries. |
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, 6.9 hours before the alert went out and 135 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
- 1777 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 515 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 9.7
The text
As transmitted, in the capitals the NWS used until 2016.
422 WFUS54 KHGX 311852 TORHOU TXC071-311915- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 152 PM CDT FRI AUG 31 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * TORNADO WARNING FOR... CHAMBERS COUNTY IN SOUTHEAST TEXAS * UNTIL 215 PM CDT * AT 142 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO JUST EAST OF MONROE CITY...MOVING NORTHEAST AT 25 MPH. MOVE TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON YOUR CAR OR MOBILE HOME FOR A STRONG SHELTER 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 2982 9469 2969 9454 2985 9436 2990 9450
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 31, 9:45 AM CDT, 4 hours 7 minutes earlier.
Area forecast discussion, Aug 31, 9:45 AM CDT, 4 hours 7 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
945 AM CDT FRI AUG 31 2001
MCS OVER SW THIRD OF CWFA THIS MORNING PRODUCING ISOLATED 2 INCH
PER HOUR RATES OVER WHARTON AND EXTREME SW FORT BEND COUNTIES.
SATELLITE IR LOOP INDICATE CLOUD TOP WARMING BY NEARLY 10 DEG C LAST
2 HOURS FROM THIS CLUSTER AND HOPEFULLY THIS TREND WILL CONTINUE.
HOWEVER...ANALYZED MORNING DATA SHOWS VERY HIGH PWATS (NEAR 2.5
INCHES AT KLCH) OVER REGION...DIFLUENCE AT UPPER LEVELS AND 30 KT
LLJET. WILL NOT CHANGE PREVIOUS PACKAGE SINCE IT IS ON TRACK.
37/46/48
.HGX...FFA ALL CWA TODAY.
SCA 20 TO 60 NM HIGH ISLAND TO THE MATAGORDA SHIP CHANNEL.
CLL...080/073 083/073 088 987
IAH...079/074 080/074 086 +87
GLS...083/079 083/079 086 +87The 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, 9:07 PM CDT | Tornado Warning | HGX | Chambers | 38 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, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.