Alert archive / Texas / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 21
The Storm Prediction Center issued this severe thunderstorm watch at Feb 16, 2001, 2:00 AM CST for De Soto Parish, Louisiana; 29 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 16, 2001, 2:00 AM CST (08:00 UTC)
- Expired
- Feb 16, 2001, 7:00 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 30 counties
De Soto Parish, LA, Anderson County, TX, Angelina County, TX, Austin County, TX, Brazos County, TX, Burleson County, TX, Cherokee County, TX, Fayette County, TX, Freestone County, TX, Grimes County, TX, Harris County, TX, Henderson County, TX, Houston County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Panola County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX
The radar
The Houston radar (KHGX), 155 km from the middle of the area, began a volume at 08:01 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, 8.0 hours before the alert went out and 251 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
- 924 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 559 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS9 KMKC 160753 SEL1 SEL1 MKC WW 160748 TXZ000-161300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 21 STORM PREDICTION CENTER NORMAN OK 148 AM CST FRI FEB 16 2001 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EAST TEXAS EFFECTIVE THIS FRIDAY MORNING FROM 200 AM UNTIL 700 AM CST. HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 70 STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES SOUTH SOUTHEAST OF COLLEGE STATION TEXAS TO 75 MILES NORTH OF LUFKIN TEXAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DISCUSSION...SHOWERS AND THUNDERSTORMS CONTINUE TO INCREASE IN AREAL COVERAGE OVER MUCH FO CENTRAL TX...PRIMARILY ALONG AND BEHIND SURFACE COLD FRONT. SQUALL LINE MAY FORM ALONG FRONT IN THE NEXT FEW HOURS AS STRONG UPPER DYNAMICS SPREAD EASTWARD INTO REGION. STRONG ENVIRONMENTAL WINDS AND MOIST/UNSTABLE AIRMASS INDICATE THE THREAT OF DAMAGING WINDS AND HAIL IN STRONGER CELLS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24040. ...HART ;294,0970 321,0955 321,0933 294,0944;
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 16, 10:00 AM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Cameron and 22 more | 5 hr |
| Feb 15, 9:15 PM CST | Severe Thunderstorm Watch | SPC | Bandera, Bexar, Blanco, Caldwell, Comal, Edwards and 15 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2001Severe Thunderstorm Watches in Louisiana, 2001Every severe thunderstorm watch 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.