Alert archive / Texas / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 21, NWS Fort Worth, TX
NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 21, 1991, 2:46 PM CST for Clay County, Texas. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Mar 21, 1991, 2:46 PM CST (20:46 UTC)
- Expired
- Mar 21, 1991, 3:30 PM CST
- In force
- 44 min
- Issued by
- NWS Fort Worth, TX
- Area
- Whole counties
County Clay County, TX
The nearest sounding before it
Fort Sill, OK (KFSI), launched 12:00Z, 8.8 hours before the alert went out and 98 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
- 40 J/kg
- Mixed-layer CIN
- -217 J/kg
- Mixed-layer LCL
- 1383 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPS 212046 SVRSPS TXC077-212130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WICHITA FALLS TX 246 PM CST THU MAR 21 1991 THE NATIONAL WEATHER SERVICE IN WICHITA FALLS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH CENTRAL TEXAS ...CLAY COUNTY A SEVERE THUNDERSTORM WAS INDICATED IN SOUTHERN CLAY COUNTY. MOVEMENT WAS NORTHEAST AT 40 MPH. THIS THUNDERSTORM LEFT THE GROUND COVERED WITH DIME TO GOLF BALL SIZE HAIL SOUTH OF LAKE WICHITA IN NORTHEASTERN ARCHER COUNTY AT 235 PM CST. SEVERE THUNDERSTORM WARNINGS FOR BAYLOR AND ARCHER COUNTIES EXPIRED AT 245 PM CST. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
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.
In the hours before
Special weather statement, Mar 21, 12:13 PM CST, 2 hours 33 minutes before
TXZ019>033-212200 SEVERE WEATHER OUTLOOK FOR NORTH TEXAS NATIONAL WEATHER SERVICE FORT WORTH TX 1215 PM CST THU MAR 21 1991 THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT OVER ALL BUT THE SOUTHEAST SECTIONS OF NORTH TEXAS. THE MODERATE RISK AREA IS NORTHWEST OF A MARSHALL-LONGVIEW-TEMPLE LINE. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SOUTHEAST OF THIS LINE. AN UPPER LEVEL LOW PRESSURE TROUGH IN THE SOUTHWESTERN U.S. WILL STRENGTHEN AND MOVE INTO EASTERN COLORADO TONIGHT AND EARLY FRIDAY. THE LOW WILL DEEPEN IN RESPONSE TO A STRONG UPPER AIR DISTURBANCE ROTATING NORTHEAST THROUGH WEST TEXAS LATE TODAY AND TONIGHT. THIS DISTURBANCE WILL CAUSE A DRY LINE...SITUATED NEAR A VERNON-ABILENE LINE AT NOON...TO MOVE EAST INTO CENTRAL AND EAST SECTIONS OF NORTH NORTH TONIGHT. STRONG THUNDERSTORMS WERE ALREADY FORMING AT NOON SOUTHWEST AND EAST OF WICHITA FALLS. THESE STORMS WILL INCREASE IN NUMBER AND INTENSITY THIS AFTERNOON...THEN PUSH EAST ACROSS CENTRAL AND EAST SECTIONS OF NORTH TEXAS THIS EVENING AND TONIGHT. THE AIR MASS IS VERY UNSTABLE ACROSS NORTH TEXAS TODAY WITH LIFTED INDICES IN THE -8 TO -10 RANGE BETWEEN ABILENE AND WICHITA FALLS AT THE NOON HOUR. FURTHERMORE...MODERATE TO STRONG VERTICAL WIND SHEAR WILL COMBINE WITH THE INSTABILITIES TO INSURE THAT A FEW OF THE STORMS REACH SEVERE LEVELS. LARGE HAIL...DAMAGING WINDS...HEAVY RAINFALL... AND A FEW TORNADOES MAY OCCUR WITH THE MOST INTENSE STORMS. ACTIVATION OF STORM SPOTTERS AND EMERGENCY PREPAREDNESS OFFICIALS IN WESTERN SECTIONS OF NORTH TEXAS MAY BE REQUESTED WITHIN THE NEXT SEVERAL HOURS. SPOTTERS AND EMERGENCY OPERATING CENTER ACTIVATION IN CENTRAL AND EAST PORTIONS OF NORTH TEXAS MAY EXPECT ACTIVATION THIS EVENING AND/OR TONIGHT.
Special weather statement, Mar 21, 1:10 PM CST, 1 hour 36 minutes before
TXZ019>033-212200
SEVERE WEATHER OUTLOOK FOR NORTH TEXAS...CORRECTED...
NATIONAL WEATHER SERVICE FORT WORTH TX
1215 PM CST THU MAR 21 1991
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT OVER ALL BUT THE SOUTHEAST SECTIONS OF NORTH TEXAS. THE
MODERATE RISK AREA IS NORTHWEST OF A MARSHALL-LONGVIEW-TEMPLE LINE.
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SOUTHEAST OF THIS LINE.
AN UPPER LEVEL LOW PRESSURE TROUGH IN THE SOUTHWESTERN U.S. WILL
STRENGTHEN AND MOVE INTO EASTERN COLORADO TONIGHT AND EARLY FRIDAY.
THE LOW WILL DEEPEN IN RESPONSE TO A STRONG UPPER AIR DISTURBANCE
ROTATING NORTHEAST THROUGH WEST TEXAS LATE TODAY AND TONIGHT. THIS
DISTURBANCE WILL CAUSE A DRY LINE...SITUATED NEAR A VERNON-ABILENE
LINE AT NOON...TO MOVE EAST INTO CENTRAL AND EAST SECTIONS OF NORTH
TEXAS TONIGHT.
STRONG THUNDERSTORMS WERE ALREADY FORMING AT NOON SOUTHWEST AND EAST
OF WICHITA FALLS. THESE STORMS WILL INCREASE IN NUMBER AND INTENSITY
THIS AFTERNOON...THEN PUSH EAST ACROSS CENTRAL AND EAST SECTIONS OF
NORTH TEXAS THIS EVENING AND TONIGHT.
THE AIR MASS IS VERY UNSTABLE ACROSS NORTH TEXAS TODAY WITH LIFTED
INDICES IN THE -8 TO -10 RANGE BETWEEN ABILENE AND WICHITA FALLS AT
THE NOON HOUR. FURTHERMORE...MODERATE TO STRONG VERTICAL WIND SHEAR
WILL COMBINE WITH THE INSTABILITIES TO INSURE THAT A FEW OF THE STORMS
REACH SEVERE LEVELS. LARGE HAIL...DAMAGING WINDS...HEAVY RAINFALL...
AND A FEW TORNADOES MAY OCCUR WITH THE MOST INTENSE STORMS.
ACTIVATION OF STORM SPOTTERS AND EMERGENCY PREPAREDNESS OFFICIALS IN
WESTERN SECTIONS OF NORTH TEXAS MAY BE REQUESTED WITHIN THE NEXT
SEVERAL HOURS. SPOTTERS AND EMERGENCY OPERATING CENTER ACTIVATION IN
CENTRAL AND EAST PORTIONS OF NORTH TEXAS MAY EXPECT ACTIVATION THIS
EVENING AND/OR TONIGHT.
...CORRECTED FOR "NORTH TEXAS" IN PARAGRAPH 2...Special weather statement, Mar 21, 1:39 PM CST, 1 hour 7 minutes before
TXZ019>033-220600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FORT WORTH TX 145 PM CST THU MAR 21 1991 ...A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CST FOR WESTERN AND NORTHWESTERN SECTIONS OF NORTH TEXAS...THE WATCH AREA INCLUDES THE CITIES OF MONTAGUE...GRAHAM...ALBANY...HASKELL...THROCKMORTON...WICHITA FALLS...SEYMOUR AND ANSON. AT 140 PM...WEATHER RADAR INDICATED STRONG THUNDERSTORMS DEVELOPING OVER NORTHWESTERN SECTIONS OF NORTH TEXAS. THE STRONGEST STORMS WERE LOCATED TO THE SOUTH AND SOUTHWEST OF WICHITA FALLS NEAR THE TOWNS OF SEYMOUR AND ARCHER CITY. THE STORMS WERE MOVING TO THE NORTHEAST AT 40 MPH AND SHOULD BE NEAR WICHITA FALLS BY 145 PM. THUNDERSTORMS WILL CONTINUE TO DEVELOP IN SOUTHWESTERN SECTIONS OF NORTH TEXAS THIS AFTERNOON AND EARLY EVENING. THE STORMS SHOULD BE FORMING IN AN AREA FROM SAN ANGELO TO FORT WORTH DURING THE LATE AFTERNOON AND WILL MOVE TO THE NORTHEAST VERY RAPIDLY. THESE THUNDERSTORMS HAVE THE POTENTIAL TO REACH SEVERE LIMITS AND PRODUCE LARGE HAIL...DANGEROUS LIGHTNING...HEAVY RAINS AND POSSIBLY A TORNADO. RESIDENTS SHOULD REMAIN ON ALERT FOR THREATENING THUNDERSTORM CLOUDS THROUGH THIS EVENING AND STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST DEVELOPMENTS.
The office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 1:16 PM CST | Severe Thunderstorm Warning | FWD | Wilbarger | 29 min |
| Mar 21, 1:57 PM CST | Severe Thunderstorm Warning | FWD | Archer, Clay | 48 min |
| Mar 21, 1:57 PM CST | Severe Thunderstorm Warning | FWD | Baylor | 48 min |
| Mar 21, 2:06 PM CST | Severe Thunderstorm Warning | FWD | Wichita | 54 min |
| Mar 21, 5:51 PM CST | Severe Thunderstorm Warning | FWD | Eastland | 54 min |
| Mar 21, 5:57 PM CST | Severe Thunderstorm Warning | FWD | Palo Pinto | 48 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1991Every severe thunderstorm warning in 1991
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.