Alert archive / Texas / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 27, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 26, 1990, 6:00 AM CDT for Comal County, Guadalupe County, Texas. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Apr 26, 1990, 6:00 AM CDT (11:00 UTC)
- Expired
- Apr 26, 1990, 6:30 AM CDT
- In force
- 30 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Comal County, TX, Guadalupe County, TX
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 11.0 hours before the alert went out and 231 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
- 2660 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 641 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 8.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 261106
SVRSAT
TXC091-187-261130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
600 AM CDT THU APR 26 1990
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH TEXAS
...COMAL...GUADALUPE
HONDO RADAR INDICATED A LINE OF THUNDERSTORMS OVER COMAL AND GUADALUPE
COUNTRY FROM NEW BRAUNFELS TO SEGUIN MOVING EAST AT 20 MILES AN HOUR.
GOLF BALL SIZE HAIL WAS REPORTED AND A ROOF WAS BLOWN OFF AN APARTMENT
IN THE NORTHWEST PART OF SAN ANTONIO. ANOTHER ROOF WAS BLOWN OFF NEAR
CANYON LAKE.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH OR MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
WHEN A THAUNDERSTORM THREATENS...SEEK SHELTER INSIDE A HOME OR
BUILDING AWAY FROM DOORS AND WINDOWS. REFRAIN FROM USING ELECTRICAL
APPLIANCES.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 26, 3:35 AM CDT, 2 hours 25 minutes before
TXZ030-034>036-261030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE AUSTIN TX 330 AM CDT THU APR 26 1990 ...TORNDAO WATCH HAS EXPIRED FOR MILLS...SAN SABA...LAMPASAS... GILLESPIE...LLANO...BURNET AND BLANCO... ...FLASH FLOOD WATCH HAS BEEN REDEFINED TO INCLUDE THE ENTIRE CENTRAL TEXAS AREA AND ADJACENT HILL COUNTY... WEATHER RADAR SHOWED A LARGE AREA OF SHOWERS AND STRONG THUNDERSTORMS PRODUCING HEAVY RAIN FROM WEST OF HONDO TO JUNCTION AND NORTHEST TO SAN SABA AMD NORTHERN MILLS COUNTY. A LIGHT RAIN AREA WITH A FEW IMBEDDED SHOWERS WERE FOUND FROM LAKE BUCHANAN...JOHNSON CITY...SAN ANTONIO...LA GRANGE...BASTROP...GEORGE- TOWN AND BACK TO LAKE BUCHANAN. MOVEMENT OF THE INDIVIDUAL CELLS IS TO THE NORTH WHILE THE AREA IS SLOWLY DRIFTING TO THE EAST. PEOLPE IN GILLESPIE...SAN SABA...AND MILLS COUNTIES SHOULD MONITOR FOR POSSIBLE HEAVY RAINS AND FLASH FLOODING. KEEP ALERT TO THE LATEST WEATHER BULLETINS AND ADVISORIES IN THE EVENT A WARNING IS ISSUED.
Special weather statement, Apr 26, 4:32 AM CDT, 1 hour 28 minutes before
TXZ030-034>036-261030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE AUSTIN TX 430 AM CDT THU APR 26 1990 ...FLASH FLOOD WATCH INCLUDES THE ENTIRE CENTRAL TEXAS AREA AND ADJACENT HILL COUNTY... AT 410 AM WEATHER RADAR SHOWED A LARGE AREA OF SHOWERS AND STRONG THUNDER- STORMS PRODUCING HEAVY RAIN FROM HONDO TO FREDERICKSBURG...SAN SABA AND MILLS COUNTY. THE STRONGER STORMS WERE SOUTH OF FREDERICKSBURG...NORTH OF LAMPASAS AND NEAR SAN SABA. A LIGHT RAIN AREA WITH A FEW IMBEDDED SHOWERS WERE FOUND FROM AUSTIN TO SAN ANTONIO. MOVEMENT OF THE INDIVIDUAL CELLS IS TO THE NORTH WHILE THE AREA IS SLOWLY DRIFTING TO THE EAST. PEOPLE IN GILLESPIE...SAN SABA...MILLS mAND LAMPASAS COUNTIES SHOULD SHOULD MONITOR FOR ANY TYPE OF HEAVY RAINS WHICH COULD CAUSE FLASH FLOODING. KEEP ALERT TO THE LATEST WEATHER BULLETINS AND ADVISORIES IN THE EVENT A WARNING IS ISSUED.
Special weather statement, Apr 26, 5:07 AM CDT, 53 minutes before
TXZ034-035-038-039-261200- BULLETIN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 505 AM CDT THU APR 26 1990 ...THUNDERSTORMS MOVING OVER SAN ANTONIO... AT 505 AM AN AREA OF SHOWERS AND THUNDERSTORMS WAS FROM BLANCO TO SAN ANTONIO TO THREE RIVERS MOVING EAST AT 20 MILES AN HOUR. THESE SHOWERS AND THUNDERSTORMS WERE PRODUCING PERIODS OF MODERATE TO HEAVY RAIN...WINDS OF 20 TO 36 MILES AN HOUR...FREQUENT LIGHTNING... AND SMALL HAIL. THEY WILL PERISIST OVER THE SAN ANTONIO AREA FROM 5 TO 6 AM THIS MORNING. MOTORISTS DRIVING EARLY THIS MORNING SHOULD BE VERY CAREFUL AT OR AVOID LOW WATER CROSSSINGS WHERE MINOR FLOODING MAY OCCUR FROM BRIEF PERIODS OF HEAVY RAIN. IN ADDITION...THE WET ROADS AND HIGHWAYS WILL MAKE FOR SLIPPERY DRIVING. AREAS TO THE EAST OF SAN ANTONIO WILL BE AFFECTED BY THESE THUNDERSTORMS IN THE NEXT FEW HOURS. RAINFALL AT THE AIRPORT SO FAR HAS BEEN SEVEN TENTHS OF AN INCH AS OF 508 AM CDT.
Special weather statement, Apr 26, 5:08 AM CDT, 52 minutes before
TXZ034-035-038-039-261200- BULLETIN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 508 AM CDT THU APR 26 1990 ...THUNDERSTORMS MOVING OVER SAN ANTONIO... AT 505 AM AN AREA OF SHOWERS AND THUNDERSTORMS WAS FROM BLANCO TO SAN ANTONIO TO THREE RIVERS MOVING EAST AT 20 MILES AN HOUR. THESE SHOWERS AND THUNDERSTORMS WERE PRODUCING PERIODS OF MODERATE TO HEAVY RAIN...WINDS OF 20 TO 36 MILES AN HOUR...FREQUENT LIGHTNING... AND SMALL HAIL. THEY WILL PERISIST OVER THE SAN ANTONIO AREA FROM 5 TO 6 AM THIS MORNING. MOTORISTS DRIVING EARLY THIS MORNING SHOULD BE VERY CAREFUL AT OR AVOID LOW WATER CROSSSINGS WHERE MINOR FLOODING MAY OCCUR FROM BRIEF PERIODS OF HEAVY RAIN. IN ADDITION...THE WET ROADS AND HIGHWAYS WILL MAKE FOR SLIPPERY DRIVING. AREAS TO THE EAST OF SAN ANTONIO WILL BE AFFECTED BY THESE THUNDERSTORMS IN THE NEXT FEW HOURS. RAINFALL AT THE AIRPORT SO FAR HAS BEEN SEVEN TENTHS OF AN INCH AS OF 508 AM CDT.
Special weather statement, Apr 26, 5:35 AM CDT, 25 minutes before
TXZ030-034>036-261130- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE AUSTIN TX 530 AM CDT THU APR 26 1990 ...FLASH FLOOD WATCH INCLUDES THE ENTIRE CENTRAL TEXAS AREA AND ADJACENT HILL COUNTY... AT 525 AM WEATHER RADAR SHOWED A LARGE AREA OF SHOWERS AND STRONG THUNDER- STORMS PRODUCING HEAVY RAIN. MOST OF THE RAIN AREA WAS WEST OF INTERSTATE 35. THE STRONGEST STORMS WERE WEST OF BLANCO...NEAR SAN SABA AND SOUTHWEST OF GOLDTHWAITE. MOVEMENT OF THE INDIVIDUAL CELLS IS TO THE NORTH WHILE THE AREA IS SLOWLY DRIFTING TO THE EAST. PEOPLE IN THE ENTIRE CENTRAL TEXAS AREA SHOULD KEEP UP WITH THE LATEST WEATHER DEVELOPMENTS AND THESE STORMS COULD PRODUCE HAIL...VERY HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT LIGHTING. KEEP TUNED TO THE LATEST WEATHER DEVELOPMENTS IN THE EVENT A WARNING IS ISSUED.
Special weather statement, Apr 26, 5:43 AM CDT, 17 minutes before
TXZ054-261245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 545 AM CDT THU APR 26 1990 ...A FLASH FLOOD WATCH CONTINUES IN EFFECT FOR VAL VERDE COUNTY TODAY... AT 530 AM CDT THERE WERE ONLY A SMALL AREA OF LIGHT SHOWERS IN THE NORTH EAST PART OF VAL VERDE COUNTY NEAR LOMA ALTA AND NORTH. MOVEMENT OF THESE SHOWERS WAS TO THE EAST 10 TO 15 MPH. THESE SHOWERS WERE ON THE WESTERN EDGE OF A LARGE AREA OF SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAINS BOUNDED BY A LINE STRECTHING FROM NORTHWEST OF LAREDO TO NEAR AUSTIN THAN NORTHWEST TO NORTH OF SONORA AND BACK SOUTH TO EAST DEL RIO. SAN FELIPE CREEK CONTINUES TO BE NEARLY 6 FEET ABOVE NORMAL AND REMAINS A THREAT TO THOSE PERSONS LIVING ALONG THE CREEK. ANYMORE RUNOFF FROM THE WATER SHED TO THE NORTH OR ADDITIONAL RAINS WILL CERTAINLY INCREASE THE DANGER ALONG THE CREEK. PERSONS LIVING ALONG SAN FELIPE SHOULD MONITOR THE SITUATION CLOSELY. LOW LYING AREAS ARE STILL FLOODED IN DEL RIO AND EASTERN VAL VERDE COUNTY. MOTORISTS ARE URGED TO USE CAUTION AND NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS ESPECIALLY IF THEY CAN NOT SEE THE ROADWAY. THE ROAD COULD BE WASHED OUT AND THE APPEARANCE OFW ATER...PATICULARLY RUNNING WATER IS DECEPTIVE AND DEPTH IS NOT EASILY GUESSED CORRECTLY. REMEMBER...A FLASH FLOOD WATCH MEANS THAT FLOODING IS POSSIBLE IN AND NEAR THE WATCH AREA. PEOPLE IN THE WATCH AREA ARE URGED TO CHECK PREPAREDNESS REQUIREMENTS...KEEP INFORMED AND BE READY TO MOVE TO SAFETY IF HEAVY RAIN OR FLOODING IS REPORTED OR OBSERVED.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:35 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 55 min |
| Apr 25, 8:44 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 61 min |
| Apr 25, 9:34 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 56 min |
| Apr 25, 9:41 PM CDT | Tornado Warning | EWX | Kinney | 64 min |
| Apr 25, 9:45 PM CDT | Tornado Warning | EWX | Val Verde | 55 min |
| Apr 25, 10:42 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 63 min |
| Apr 25, 11:25 PM CDT | Flash Flood Warning | EWX | Kinney | 3 hr |
| Apr 26, 12:15 AM CDT | Severe Thunderstorm Warning | EWX | Real | 60 min |
| Apr 26, 5:18 AM CDT | Severe Thunderstorm Warning | EWX | Bexar, Comal, Guadalupe | 42 min |
| Apr 26, 5:54 AM CDT | Severe Thunderstorm Warning | EWX | Hays | 66 min |
| Apr 26, 6:52 AM CDT | Flash Flood Warning | EWX | Mills | 2 hr |
| Apr 26, 9:03 AM CDT | Flash Flood Warning | EWX | Mills | 3 hr |
| Apr 26, 12:05 PM CDT | Tornado Warning | EWX | Victoria | 25 min |
| Apr 26, 12:33 PM CDT | Tornado Warning | EWX | Victoria | 57 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1990Every severe thunderstorm warning in 1990
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.