Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 54, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 13, 1987, 9:28 PM CDT for Uvalde County, Texas. It was in force for 62 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 13, 1987, 9:28 PM CDT (02:28 UTC)
- Expired
- May 13, 1987, 10:30 PM CDT
- In force
- 62 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Uvalde 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 13, 9:40 PM CDT | Hail 1.75 | Uvalde, 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
Del Rio, TX (KDRT), launched 00:00Z, 2.5 hours before the alert went out and 104 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
- 3087 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
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 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 13, 8:17 PM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 816 PM CDT WED MAY 13 1987 ...THUNDERSTORMS OBSERVED IN THE DEL RIO AREA... AT 815 PM CDT THUNDERSTORMS WERE OBSERVED AT THE DEL RIO INTERGNATIONAL AIRPORT. THESE STORMS WERE MOVING TO THE NORTHEAST AT 10 TO 15 MPH. HEAVY RAIN...SMALL HAIL...STRONG GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING ARE POSSIBLE WITH THESE STORMS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 7:26 PM CDT | Severe Thunderstorm Warning | EWX | Zavala | 64 min |
| May 13, 8:09 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 66 min |
| May 13, 10:20 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kerr | 55 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1987Every severe thunderstorm warning in 1987
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.