Alert archive / Texas / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 13, 1991, 7:31 PM CDT for Grimes County, Walker County, Texas. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Apr 13, 1991, 7:31 PM CDT (00:31 UTC)
- Expired
- Apr 13, 1991, 8:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Grimes County, TX, Walker County, TX
The nearest sounding before it
Longview/Gregg, TX (KGGG), launched 00:00Z, 0.5 hours before the alert went out and 220 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 640 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KHOU 140030 SVRHOU TXC185-471-140130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON TX 731 PM CDT SAT APR 13 1991 THE NATIONAL WEATHER SERVICE IN HOUSTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST TEXAS ...GRIMES COUNTY...WALKER COUNTY WEATHER SERVICE RADAR CONTINUES TO INDICATE A SEVERE THUNDERSTORM IN NORTHWEST GRIMES COUNTY. THIS STORM HAS BEEN NEARLY STANARY. RADAR ALSO INDICATED A SEVERE STORM IN WEST WALKER COUNTY MOVING TO THE EAST AT 25 MILES AN HOUR AND WILL EFFECT HUNTSVILLE IN THE NEXT FIFTEEN MINUTES. REMEMBER SEVERE THUNDERSTORMS CAN AND OC@CASIONALLY 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, Apr 13, 1:33 PM CDT, 5 hours 58 minutes before
TXZ037-032-045-131930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON TX 130 PM CDT SAT APR 13 1991 ...TORNADO WATCH CONTINUES FOR A PORTION OF EAST AND SOUTHEAST TEXAS... A TORNADO WATCH CONTINUES FOR A PORTION OF EAST AND SOUTHEAST TEXAS INCLUDING THE COUNTIES OF HOUSTON...TRINITY...WASHINGTON...GRIMES... SAN JACINTO...WALKER...AND MONTGOMERY UNTIL 600 PM CDT. AT 125 PM WEATHER SERVICE RADAR INDICATES WIELY SCATTERED SHOWERS HAVE DEVELOPED ACROSS SOUTHEAST TEXAS. AN AREA OF RAIN WITH EMBEDDED SHOWERS AND THUNDERSTORMS CONTINUES FROM NORTHEAST OF AUSTIN TO CROCKETT TO TYLER. MOVEMENT IS NORTHEAST AT 30 MPH. CONDITIONS REMAIN FAVORABLE FOR THE DEVELOPMENT OF STORMS WHICH PRODUCE TORNADOES. THUNDERSTORMS WITH GUSTY WIND...HAIL...DANGEROUS LIGHTNING AND HEAVY RAIN ARE ALSO POSSIBLE. PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. BE PREPARED TO SEEK SHELTER IMMEDIATELY SHOULD A WARNING BE ISSUED OR IF A TORNADO IS SIGHTED. STAY TUNED TO YOUR NOAA WEATHER RADIO OR LOCAL TELEVISION STATION FOR FURTHER INFORMATION ON THIS WEATHER EVENT.
Special weather statement, Apr 13, 2:40 PM CDT, 4 hours 51 minutes before
TXZ037-032-045-132045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON TX 240 PM CDT SAT APR 13 1991 ...TORNADO WATCH CONTINUES FOR A PORTION OF EAST AND SOUTHEAST TEXAS... A TORNADO WATCH CONTINUES FOR A PORTION OF EAST AND SOUTHEAST TEXAS INCLUDING THE COUNTIES OF HOUSTON...TRINITY...WASHINGTON...GRIMES... SAN JACINTO...WALKER...AND MONTGOMERY UNTIL 600 PM CDT. AT 230 PM WEATHER SERVICE RADAR SHOWS SCATTERED SHOWERS AND THUNDERSTORMS THROUGHOUT SOUTHEAST TEXAS...MOVEMENT IS NORTHEAST AT 30 MPH. NO SEVERE THUNDERSTORMS OR TORNADIC ACTIVITY HAS BEEN REPORTED THUS FAR. CONDITIONS REMAIN FAVORABLE FOR THE DEVELOPMENT OF STORMS WHICH PRODUCE TORNADOES. THUNDERSTORMS WITH GUSTY WIND...HAIL...DANGEROUS LIGHTNING AND HEAVY RAIN ARE ALSO POSSIBLE. PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. BE PREPARED TO SEEK SHELTER IMMEDIATELY SHOULD A WARNING BE ISSUED OR IF A TORNADO IS SIGHTED. STAY TUNED TO YOUR NOAA WEATHER RADIO OR LOCAL TELEVISION STATION FOR FURTHER INFORMATION ON THIS WEATHER EVENT.
Special weather statement, Apr 13, 3:47 PM CDT, 3 hours 44 minutes before
TXZ037-032-045-132200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON TX 347 PM CDT SAT APR 13 1991 ...TORNADO WATCH IN EFFECT FOR PORTIONS OF EAST AND SOUTHEAST TEXAS... A TORNADO WATCH CONTINUES FOR MUCH OF EAST AND PORTIONS OF SOUTHEAST TEXAS UNTIL 6 PM CDT. THE COUNTIES OF HOUSTON...TRINITY... WASHINGTON...GRIMES...SAN JACINTO...WALKER...AND MONTGOMERY ARE INCLUDED. AT 335 PM WEATHER SERVICE RADAR SHOWS SCATTERED SHOWERS AND THUNDERSTORMS THROUGHOUT SOUTHEAST TEXAS. THE HEAVIEST RAIN REMAINS WELL TO THE NORTH AND EXTENDS FROM NORTHEAST OF AUSTIN TO NEAR LONGVIEW. MOVEMENT IS NORTHEAST AT 30 MPH. CONDITIONS ARE STILL FAVORABLE FOR TORNADIC DEVELOPMENT AS WELL AS THUNDERSTORMS PRODUCING HEAVY RAIN...GUSTY WIND...HAIL...AND DANGEROUS LIGHTNING. PERSONS IN THE WATCH AREA SHOULD REMAIN ALERT. BE PREPARED TO SEEK SHELTER IMMEDIATELY IF A WARNING IS ISSUED OR A TORNADO IS SIGHTED.
Special weather statement, Apr 13, 4:14 PM CDT, 3 hours 17 minutes before
TXZ047-037-032-045-132315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON TX 415 PM CDT SAT APR 13 1991 ...TORNADO WATCH IN EFFECT FOR PARTS OF EAST AND SOUTHEAST TEXAS... A TORNADO WATCH HAS BEEN ISSUED FOR PARTS OF EAST AND SOUTHEAST TEXAS INCLUDING THE HOUSTON METROPOLITAN AREA UNTIL 900 PM CDT. THE COUNTIES OF HARRIS...WALKER...GRIMES...SAN JACINTO...WALLER... MONTGOMERY...AUSTIN...WASHINGTON...TRINITY...AND HOUSTON ARE INCLUDED. AT 405 PM WEATHER SERVICE RADAR INDICATES SCATTERED SHOWERS AND THUNDERSTORMS THROUGHOUT EAST AND SOUTHEAST TEXAS. A BAND OF HEAVY SHOWERS AND STRONG THUNDERSTORMS EXTENDS FROM NORTHEAST OF AUSTIN TO SHREVEPORT LOUISIANA. MOVEMENT IS NORTHEAST AT 30 MPH. A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR STORMS WHICH PRODUCE TORNADOES. HEAVY RAIN...DANGEROUS LIGHTNING...GUSTY WIND AND HAIL ARE ALSO POSSIBLE. PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR RAPIDLY CHANGINmG WEATHER CONDITIONS. BE PREPARED TO SEEK SHELTER IMMEDIATELY IF A WARNING IS ISSUED OR A TORNADO IS SIGHTED.
Special weather statement, Apr 13, 5:12 PM CDT, 2 hours 19 minutes before
TXZ047-037-032-045-132315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON TX 512 PM CDT SAT APR 13 1991 ...TORNADO WATCH IN EFFECT FOR PARTS OF EAST AND SOUTHEAST TEXAS... THE TORNADO WATCH INCLUDES THE HOUSTON METROPOLITIN AREA AND THE COUNTIES OF HARRIS...WALKER...GRIMES...SAN JACINTO...WALLER...MONTGOMERY... AUSTIN...WASHINGTON...TRINITY...AND HOUSTON UNTIL 900 PM. AT 505 PM WEATHER SERVICE RADAR INDICATES A BAND OF HEAVY SHOWERS AND STRONG THUNDERSTORMS EXTENDING FROM EAST OF AUSTIN ACROSS HOUSTON COUNTY TO NORTHEAST OF THE TOLEDO BEND RESERVOIR. THIS BAND IS MOVING THE EAST AT 30 MPH. A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR STORMS WHICH PRODUCE TORNADOES. HEAVY RAIN...DANGEROUS LIGHTNING...GUSTY WIND AND SMALL HAIL CAN BE EXPECTED AS THESE THUNDERSTORMS MOVE ACROSS THE AREA. PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR RAPID DEVELOPING WEATHER AND BE PREPARED TO SEEK SHELTER IMMEDIATELY IF A WARNING IS ISSUED OR A TORNADO IS SIGHTED.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 8:38 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Walker | 67 min |
| Apr 13, 8:38 PM CDT | Severe Thunderstorm Warning | HGX | Colorado | 67 min |
| Apr 13, 9:01 PM CDT | Severe Thunderstorm Warning | HGX | Washington | 59 min |
| Apr 13, 10:38 PM CDT | Tornado Warning | HGX | Waller | 37 min |
| Apr 13, 11:08 PM CDT | Severe Thunderstorm Warning | HGX | Austin | 52 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.