Alert archive / Texas / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 48, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 21, 1990, 6:44 PM CDT for Val Verde County, Texas. It was in force for 61 min.
The area
The counties it named.
The facts
- Issued
- May 21, 1990, 6:44 PM CDT (23:44 UTC)
- Expired
- May 21, 1990, 7:45 PM CDT
- In force
- 61 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Val Verde 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
Del Rio, TX (KDRT), launched 12:00Z, 11.7 hours before the alert went out and 66 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
- 631 J/kg
- Mixed-layer CIN
- -410 J/kg
- Mixed-layer LCL
- 1611 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDRT 212344 SVRDRT TXC465-220045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DEL RIO TX 644 PM CDT MON MAY 21 1990 THE NATIONAL WEATHER SERVICE IN DEL RIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY... IN SOUTH CENTRAL TEXAS ...VAL VERDE COUNTY AT 645 PM CDT A SEVERE THUNDERSTORM WAS LOCATED NORTH OF COMSTOCK AND WAS MOVING TO THE SOUTHWEST AT 10 MPH. PERSONS LIVING IN THE COMSTOCK AREA AND IN BETWEEN COMSTOCK AND LANGTRY SHOULD BE PREPARED TO SEEK SHELTER FROM THIS STORM AS IT APRROACHES. GOLFBALL SIZE HAIL HAVE BEEN REPORTED OUT OF THESE THUNDERSTORMS EARLIER THIS EVENING OVER THE HILL COUNTRY NEAR KERRVILLE. BOATERS AND CAMPERS ALONG THE RIO GRANDE AND OTHER LOCAL RIVERS SHOULD TAKE PRECAUTIONARY MEASURES BEFORE THE STORM APPROACHES. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. NNNN
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, May 21, 4:26 PM CDT, 2 hours 18 minutes before
TXZ035-054-212230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO, TX 425 PM CDT MON MAY 21 1990 A THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED AT 420 PM 15 MILES NORTHWEST OF LEAKEY. THIS STORM WAS MOVING TO THE WEST AT 12 MPH. AS IT MOVED ACROSS THE PRADE RANCH IN NORTHERN REAL COUNTY...THE STORM PRODUCED VERY HEAVY RAINFALL AND PEA TO MARBLE-SIZED HAIL. RAINFALL RATES IN THIS STORM ARE ESTIMATED AT OVER 2 INCHES PER HOUR. THE STORM APPEARS LIKELY TO ENTER EDWARDS COUNTY WITHIN THE NEXT 30 MINUTES. THIS STORM HAS THE POTENTIAL TO PRODUCE LARGER HAIL...ALONG WITH VERY STRONG WINDS AND DEADLY LIGHTNING.
Special weather statement, May 21, 5:28 PM CDT, 1 hour 16 minutes before
TXZ035-054-212330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO, TX 528 PM CDT MON MAY 21 1990 AT 500 PM THIS AFTERNOON...A WEAK COLD FRONT STRETCHED AT 400 PM ALONG A COLLEGE STATION TO AUSTIN TO DEL RIO LINE...AND WAS MOVING TO THE SOUTH AT 10 MPH. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS HAD FORMED ALONG THE FRONT BETWEEN AUSTIN AND DEL RIO. THE HEAVIEST RAINFALL...AS INDICATED BY WEATHER SERVICE RADAR...WAS OCCURRING OVER REAL COUNTY. RAINFALL ESTIMATES BY RADAR AND SATELLITE RANGED FROM NEAR 1 INCH IN THE NORTHERN HALF OF THE COUNTY TO JUST OVER ONE HALF INCH OVER SOUTHERN REAL COUNTY IN THE PAST HOUR. THE THUNDERSTORMS HAD SHOWN VERY LITTLE MOVEMENT IN THE PAST HOUR. THE ATMOSPHERE OVER SOUTH CENTRAL TEXAS IS VERY UNSTABLE TONIGHT...MUCH LIKE THE SITUATION THAT OCCURRED LAST NIGHT. PLENTY OF SUNSHINE RAISED TEMPERATURES INTO THE 90S JUST AHEAD OF THE FRONT...AND THIS VERY WARM... MOIST AND UNSTABLE AIR@ WILL CONTINUE FOR SEVERAL HOURS.
Special weather statement, May 21, 5:30 PM CDT, 1 hour 14 minutes before
TXZ035-054-212330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO, TX 530 PM CDT MON MAY 21 1990 AT 500 PM THIS AFTERNOON...A WEAK COLD FRONT STRETCHED ALONG A COLLEGE STATION TO AUSTIN TO DEL RIO LINE...AND WAS MOVING TO THE SOUTH AT 10 MPH. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS HAD FORMED ALONG THE FRONT BETWEEN AUSTIN AND DEL RIO. THE HEAVIEST RAINFALL...AS INDICATED BY WEATHER SERVICE RADAR...WAS OCCURRING OVER REAL COUNTY. RAINFALL ESTIMATES BY RADAR AND SATELLITE RANGED FROM NEAR 1 INCH IN THE NORTHERN HALF OF THE COUNTY TO JUST OVER ONE HALF INCH OVER SOUTHERN REAL COUNTY IN THE PAST HOUR. THE THUNDERSTORMS HAD SHOWN VERY LITTLE MOVEMENT IN THE PAST HOUR. THE ATMOSPHERE OVER SOUTH CENTRAL TEXAS IS VERY UNSTABLE TONIGHT...MUCH LIKE THE SITUATION THAT OCCURRED LAST NIGHT. PLENTY OF SUNSHINE RAISED TEMPERATURES INTO THE 90S JUST AHEAD OF THE FRONT...AND THIS VERY WARM... MOIST AND UNSTABLE AIR WILL CONTLINUE FOR SEVERAL HOURS.
Special weather statement, May 21, 6:25 PM CDT, 19 minutes before
TXZ035-038-039-054-220030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO, TX 625 PM CDT MON MAY 21 1990 ...SEVERE THUNDERSTORM WARNING IN EFFECT FOR UVALDE COUNTY TIL 715 PM... AT 620 PM...WEATHER SERVICE RADAR CONTINUED TO SHOW WIDELY SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...DEVELOPING ALONG A WEAK COLD FRONT. THE FRONT STRETCHED FROM NEAR AUSTIN TO DEL RIO AND WAS MOVING SOUTH AT 10 MPH. THE HEAVIEST RAIN WAS INDICATED IN A THUNDERSTORM 10 MILES NORTHWEST OF THE CITY OF UVALDE. THIS STORM WAS MOVING TO THE SOUTH AT 15 MPH. IT HAD PRODUCED HAIL...SIZE UNKNOWN...AS IT MOVED ACROSS NORTHWESTERN UVALDE COUNTY. WITH THE VERY UNSTABLE CONDITIONS IN PLACE OVER SOUTH CENTRAL TEXAS TONIGHT...THIS STORM HAS THE POTENTIAL TO PRODUCE LARGE HAIL AS WELL AS DAMAGING WINDS. PERSONS IN AND NEAR THE TRACK OF THIS SEVERE THUNDERSTORM SHOULD MOVE INDOORS INTO A WELL-BUILT BUILDING OR HOME AND STAY AWAY FROM WINDOWS AND DOORS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:02 PM CDT | Severe Thunderstorm Warning | EWX | McMullen | 58 min |
| May 20, 8:35 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa | 55 min |
| May 20, 9:21 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa | 54 min |
| May 20, 10:20 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 50 min |
| May 20, 10:29 PM CDT | Severe Thunderstorm Warning | EWX | Wilson | 76 min |
| May 20, 10:59 PM CDT | Severe Thunderstorm Warning | EWX | Gonzales | 61 min |
| May 21, 2:06 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 69 min |
| May 21, 2:37 PM CDT | Tornado Warning | EWX | Kerr | 68 min |
| May 21, 5:23 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 67 min |
| May 21, 6:07 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 68 min |
| May 21, 6:15 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 45 min |
| May 21, 6:30 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 30 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.