Alert archive / Texas / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 101, NWS Midland/Odessa, TX

July 17, 1987Pecos County, Terrell County, Texas

NWS Midland/Odessa, TX issued this severe thunderstorm warning at Jul 17, 1987, 4:07 PM CDT for Pecos County, Terrell County, Texas. It was in force for 53 min.

The area

The counties it named.

The facts

Issued
Jul 17, 1987, 4:07 PM CDT (21:07 UTC)
Expired
Jul 17, 1987, 5:00 PM CDT
In force
53 min
Issued by
NWS Midland/Odessa, TX
Area
Whole counties

Counties Pecos County, TX, Terrell 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

Midland Regional, TX (KMAF), launched 12:00Z, 9.1 hours before the alert went out and 162 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.

Skew-T log-pSkew-T log-p diagram, Midland Regional, TX at 12:00Z on 1987-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 429 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 1987-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
429 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
1283 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMAF 172107
SVRMAF
TXC443-172200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIDLAND TX
407 PM CDT FRI JUL 17 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  500 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHWEST TEXAS
          ...EASTERN PECOS AND NORTHERN TERRELL
 
RADAR INDICATES A SEVERE THUNDERSTORM 8 MILES WEST OF SHEFFIELD
MOVING SLOWLY EAST ALONG THE COUNTY LINE TOWARD SHEFFIELD.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  wMOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 3:00 PM CDTSevere Thunderstorm WarningMAFPecos60 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; the sounding from the Mesonet's radiosonde archive.