Alert archive / Texas / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 50, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 22, 1990, 2:20 AM CDT for Val Verde County, Texas. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- May 22, 1990, 2:20 AM CDT (07:20 UTC)
- Expired
- May 22, 1990, 3:15 AM CDT
- In force
- 55 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 00:00Z, 7.3 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
- 3436 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 1583 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDRT 220720 SVRDRT TXC465-220815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DEL RIO TX 220 AM CDT TUE MAY 22 1990 THE NATIONAL WEATHER SERVICE IN DEL RIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY... IN SOUTH CENTRAL TEXAS ...VAL VERDE COUNTY AT 220 AM CDT THE LEADING EDGE OF A SEVERE THUNDERSTORM WITH POSSIBLE LARGE HAIL...DAMAGING WINDS AND VERY HEAVY RAIN WAS LOCATED ABOUT 8 MILES SOUTH OF DEL RIO. THIS STORM WAS MOVING AND BUILDING TO THE EAST NORTHEAST NEAR 6 MPH. A SLIGHTLY LESS INTENSE THUNDERSTORM CONTINUED NEAR HIGHWAY 90W JUST WEST OF THE LAKE AMISTAD BRIDGE WITH LITTLE MOVEMNT. THE SLOW MOVEMENT OF THESE STORMS WILL LEAD TO FLOODING OF LOW WATER CROSSINGS AND LOW LYING AREAS. MOTORISTS SHOULD NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS. 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, 9:09 PM CDT, 5 hours 11 minutes before
TXC465-220315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 909 PM CDT MON MAY 21 1990 AT 910 PM CDT MOST OF THE THUNDERSTORMS HAD MOVED OUT OF VAL VERDE COUNTY INTO MEXICO. A FEW SHOWERS LINGERED WEST OF COMSTOCK AND NEAR LOMA ALTA. THE THUNDERSTORMS THAT MOVED WEST AND SOUTH OF LANGTRY INTO MEXICO DROPPED MARBLE SIZE HAIL...BRIEF HEAVY RAIN AND STRONG WIN HIGHWAY 90W BETWEEN LANGTRY AND VAL VERDE TERRRELL COUNTY LINE. THE HAIL COVERED A SMALL SECTION OF HIGHWAY 90W. NNNN
Local storm report, May 21, 10:10 PM CDT, 4 hours 10 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SAN ANTONIO, TX
1009 PM CDT MON MAY 21 1990
TIME EVENT
243 PM CDT GOLFBALL SIZED HAIL WITH HEAVY RAIN AND GUSTY
WIND SOUTHWEST OF KERRVILLE
650 PM CDT GOLFBALL SIZED HAIL WITH HIGH WINDS 6 WEST OF UVALDESpecial weather statement, May 21, 11:11 PM CDT, 3 hours 9 minutes before
TXZ038-041-054-220530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO, TX 1110 PM CDT MON MAY 21 1990 A THUNDERSTORM HAD REDEVELOPED JUST BEFORE 1100 PM THIS EVENING ABOUT 8 MILES TO THE NORTHWEST OF THE CITY OF DEL RIO. THIS STORM WAS MOVING TO THE SOUTHEAST AT 10 MPH. IF IT CONTINUES ITS CURRENT DIRECTION AND RATE OF SPEED...IT WILL REACH THE CITY OF DEL RIO SHORTLY BEFORE MIDNIGHT. IN THE VERY UNSTABLE AIRMASS OVER THE EDWARDS PLATEAU TONIGHT...SUCH SHOWERS AND THUNDERSTORMS CAN BUILD VERY RAPIDLY...PRODUCING BRIEF BUT VERY HEAVY RAIN...GUSTY WINDS...DANGEROUS LIGHTNING...AND EVEN SOME HAIL. ADDITIONAL THUNDERSTORMS WERE INDICATED BY WEATHER SERVICE RADAR AT 1105 PM IVN THE MOUNTAINS OF MEXICO...FROM ABOUT 30 MILES WEST OF EAGLE PASS TO AROUND 40 MILES WEST OF LAREDO. LITTLE MOVEMENT WAS INDICATED WITH THESE THUNDERSTORMS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 11:45 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 60 min |
| May 22, 3:34 AM CDT | Flash Flood Warning | EWX | Val Verde | 60 min |
| May 22, 3:34 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 60 min |
| May 22, 12:19 PM CDT | Tornado Warning | EWX | Calhoun | 26 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.