Alert archive / Texas / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 39, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 20, 1990, 9:21 PM CDT for Atascosa County, Texas. It was in force for 54 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
- May 20, 1990, 9:21 PM CDT (02:21 UTC)
- Expired
- May 20, 1990, 10:15 PM CDT
- In force
- 54 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Atascosa County, TX
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 20, 10:15 PM CDT | Hail 1.75 | Atascosa, 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 00:00Z, 2.4 hours before the alert went out and 174 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
- 3978 J/kg
- Mixed-layer CIN
- -197 J/kg
- Mixed-layer LCL
- 1074 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 210221
SVRSAT
TXC013-210315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
921 PM CDT SUN MAY 20 1990
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...ATASCOSA
THE ATASCOSA COUNTY SHERIFFS DEPARTMENT REPORTED AT 915 PM THAT SMALL
HAIL WAS FALLING 10 MILES SOUTH OF JOURDANTON. THIS THUNDERSTORM HAS
ALSO LIKELY PRODUCED LARGER HAIL...DAMAGING WINDS AND VERY HEAVY RAIN
AS IT MOVED THROUGH THE SOUTHWESTERN PORTION OF ATASCOSA COUNTY NEAR
HINDES EARLIER THIS EVENING.
THIS WARNING EXTENDS THE SEVERE THU9NDERSTORM WARNING ISSUED EARLIER
THIS EVENING FOR ATASCOSA COUNTY.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.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, 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 |
| May 21, 6:44 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 61 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.