Alert archive / Texas / Tornado Warnings in 1991
Tornado Warning 20, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this tornado warning at Oct 1, 1991, 5:29 PM CDT for Jackson County, Texas. It was in force for 31 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 1, 1991, 5:29 PM CDT (22:29 UTC)
- Expired
- Oct 1, 1991, 6:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Jackson County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 1, 5:35 PM CDT | Tornado F1 | Jackson, TX |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 10.5 hours before the alert went out and 155 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
- 1480 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 651 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, Oct 1, 12:14 PM CDT, 5 hours 15 minutes before
TXZ0034-035-038-039-012200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 1215 PM CDT TUE OCT 1 1991 RADAR INDICATED THAT SCATTERED SHOWERS HAVE DEVELOPED OVER THE TEXAS HILL COUNTRY AND ADJACENT SOUTH CENTRAL TEXAS. THE SHOWERS WERE LOCATED FROM NEAR NEW BRAUNFELS...EAST OF SAN ANTONIO...WEST OF HONDO AND NORTH TO BLANCO...JUNCTION AND MASON. VERY LITTLE MOVEMENT OF THESE SHOWERS HAS BEEN OBSERVED AND BECAUSE OF THIS SLOW MOVEMENT BRIEF HEAVY RAINFALL IS LIKELY. ATMOSPHERIC CONDITIONS ARE FAVORABLE THIS AFTERNOON FOR THE SHOWERS TO BECOME MORE WIDESPREAD AND STRONGER IN INTENSITY. SHOULD THIS HAPPEN...LIGHTNING...GUSTY WIND AND LOCALLY HEAVY RAINFALL CAUSING POSSIBLE FLOODING OF STREETS AND LOW WATER CROSSINGS CAN BE EXPECTED. STAY TUNED TO YOUR LOCAL RADIO...TV OR NOAA WEATER RADIO FOR FURTHER STATEMENTS WHICH WILL BE ISSUED AS NEEDED.
Special weather statement, Oct 1, 3:13 PM CDT, 2 hours 16 minutes before
TXZ036-012200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 305 PM CDT TUE OCT 01 1991 ...SHOWERS AND THUNDERSTORMS DEVELOPING OVER SOUTH CENTRAL TEXAS... AT 3 PM CDT...RADAR SHOWED SHOWERS AND THUNDERSTORMS...SOME PRODUCING HEAVY RAINFALL AND SMALL HAIL WITH DANGEROUS LIGHTNING OVER CENTRAL AND SOUTH CENTRAL TEXAS. MOVEMENT WAS TOWARDS THE SOUTHEAST AT 5 MPH. AS A RESULT OF THE VERY SLOW MOVEMENT...LOCALIZED FLOODING OF LOW LYING AREAS IS LIKELY DURING THE NEXT COUPLE OF HOURS. PERSONS SHOULD AVOID LOW WATER CROSSINGS WHERE WATER CROSSES THE ROADWAY AND REDUCE SPEED AS PONDING OF WATER ON ROADWAYS CAN MAKE FOR HAZARDOUS DRIVING CONDITIONS. AT 245 PM MARBLE SIZE HAIL WAS REPORTED AT RUNDBERG AND NORTH LAMAR IN NORTH AUSTIN. PJL
Special weather statement, Oct 1, 3:29 PM CDT, 2 hours before
TXZ036-012200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 305 PM CDT TUE OCT 01 1991 ...SHOWERS AND THUNDERSTORMS DEVELOPING OVER SOUTH CENTRAL TEXAS... AT 3 PM CDT...RADAR SHOWED SHOWERS AND THUNDERSTORMS...SOME PRODUCING HEAVY RAINFALL AND SMALL HAIL WITH DANGEROUS LIGHTNING OVER CENTRAL AND SOUTH CENTRAL TEXAS. MOVEMENT WAS TOWARDS THE SOUTHEAST AT 5 MPH. AS A RESULT OF THE VERY SLOW MOVEMENT...LOCALIZED FLOODING OF LOW LYING AREAS IS LIKELY DURING THE NEXT COUPLE OF HOURS. PERSONS SHOULD AVOID LOW WATER CROSSINGS WHERE WATER CROSSES THE ROADWAY AND REDUCE SPEED AS PONDING OF WATER ON ROADWAYS CAN MAKE FOR HAZARDOUS DRIVING CONDITIONS. AT 245 PM MARBLE SIZE HAIL WAS REPORTED AT RUNDBERG AND NORTH LAMAR IN NORTH AUSTIN. PJL
Special weather statement, Oct 1, 3:35 PM CDT, 1 hour 54 minutes before
TXZ0034-035-038-039-020000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 330 PM CDT TUE OCT 1 1991 RADAR INDICATED THAT SCATTERED SHOWERS AND THUNDERSTORMS FROM ATASCOSA COUNTY NORTH THROUGH BEXAR...CONAL AND GUADALUPE COUNTIES. SOME OF THE STORMS CONTAINED VERY HEAVY RAIN AND SMALL HAIL. BECAUSE OF THE VERY SLOW MOVEMENT OF THE STORMS LOCALIZED FLOODING OF LOW LYING AREAS MAY OCCUR DURING THE NEXT FEW HOURS. PERSONS SHOULD AVOID LOW WATER CROSSING WHERE WATER CROSSES THE ROADWAY AND REDUCE SPEED DURING THE RUSH HOURS THIS AFTERNOON. THE THUNDERSTORMS SHOULD REMAIN ACTIVE FOR THE NEXT FEW HOURS AND BEGIN TO DIMINISH AFTER SUNSET. STAY TUNED TO YOUR LOCAL RADIO..c.TV OR NOAA WEATER RADIO FOR FURTHER STATEMENTS WHICH WILL BE ISSUED AS NEEDED.
Special weather statement, Oct 1, 5:21 PM CDT, 8 minutes before
TXZ036-020100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 520 PM CDT TUE OCT 01 1991 ...THUNDERSTORMS SCATTERED OVER SOUTH CENTRAL TEXAS... AT 515 PM CDT...RADAR SHOWED THUNDERSTORMS...SOME PRODUCING HEAVY RAINFALL AND SMALL HAIL WITH DANGEROUS LIGHTNING OVER CENTRAL AND SOUTH CENTRAL TEXAS. HEAVY RAIN AREAS WERE NOTED NEAR GIDDINGS... CALDWELL AND SPICEWOOD. MOVEMENT WAS TOWARD THE SOUTH AT 5 TO 10 MPH. AS A RESULT OF THE VERY SLOW MOVEMENT...LOCALIZED FLOODING OF LOW LYING AREAS IS LIKELY DURING THE NEXT COUPLE OF HOURS. PERSONS SHOULD AVOID LOW WATER CROSSINGS WHERE WATER CROSSES THE ROADWAY AND REDUCE SPEED AS PONDING OF WATER ON ROADWAYS CAN MAKE FOR HAZARDOUS DRIVING CONDITIONS. KEEP UP WITH THE LATEST WEATHER DEVELOPMENTS...STATEMENTS AND OR WARNINGS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 1, 6:02 PM CDT | Severe Thunderstorm Warning | EWX | Calhoun | 58 min |
Nearby
Tornado Warnings in Texas, 1991Every tornado warning in 1991Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.