Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 13, NWS Houston/Galveston, TX

April 19, 1986Harris County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 19, 1986, 10:26 PM CST for Harris County, Texas. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
Apr 19, 1986, 10:26 PM CST (04:26 UTC)
Expired
Apr 19, 1986, 11:30 PM CST
In force
64 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Harris 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

Victoria Regiona, TX (KVCT), launched 00:00Z, 4.4 hours before the alert went out and 184 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, Victoria Regiona, TX at 00:00Z on 1986-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 635 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Victoria Regiona, TX at 00:00Z on 1986-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.1939Sfc1 km3 km6 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
635 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHOU 200428 COR
SVRHOU
TXC201-200530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON TX
1026 PM CST SAT APR 19 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1130 PM CST FOR PEOPLE IN THE FOLLOWING
COUNTY OF

TEXAS...HARRIS

RADAR INDICATES A SEVERE THUNDERSTORM IN NORTHWEST HARRIS COUNTY
MOVING SOUTHEAST AT 25 MPH.

 PERSONS SHOULD REMAIN ALERT AND BE PREPARED TO SEEK SAFE SHELTER
 IF THREATENING WEATHER IS SIGHTED OR REPORTED IN YOUR AREA.

 SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
 LARGE HAIL AND DEADLY LIGHTNING.

 STAY TUNED TO NOAA WEATHER RADIO OR LOCAL NEWS MEDIA FOR FUR1THER
 STATEMENTS OR WARNINGS.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 9:15 PM CSTSevere Thunderstorm WarningHGXMontgomery60 min

Nearby

Severe Thunderstorm Warnings in Texas, 1986Every severe thunderstorm warning in 1986

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.