Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 149, NWS Fort Worth, TX

April 12, 1986Dallas County, Rockwall County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 12, 1986, 12:24 AM CST for Dallas County, Rockwall County, Texas. It was in force for 51 min. 4 reports 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
Apr 12, 1986, 12:24 AM CST (06:24 UTC)
Expired
Apr 12, 1986, 1:15 AM CST
In force
51 min
Issued by
NWS Fort Worth, TX
Area
Whole counties

Counties Dallas County, TX, Rockwall 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

TimeReportWhereRemark
Apr 12, 12:55 AM CSTHail 1.75Dallas, TX
Apr 12, 1:00 AM CSTThunderstorm Wind 0Rockwall, TX
Apr 12, 1:11 AM CSTHail 4.5Dallas, TX
Apr 12, 1:18 AM CSTHail 1Dallas, 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

Stephenville/Cla, TX (KSEP), launched 00:00Z, 6.4 hours before the alert went out and 157 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, Stephenville/Cla, TX at 00:00Z on 1986-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 543 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, Stephenville/Cla, TX at 00:00Z on 1986-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.1939587897117136Sfc1 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
543 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
630 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
322 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.8

Open this sounding in Storm Lab

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, Apr 11, 7:26 PM CST, 4 hours 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
725 PM CST FRI APR 11 1986

        ...THUNDERSTORMS DEVELOPING ACROSS NORTHEAST TEXAS...

AT 720 PM CST NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF
THUNDERSTORMS ACROSS NORTHEAST TEXAS. THE THUNDERSTORMS EXTENDED FROM
JUST NORTH OF CLARKSVILLE SOUTHWARD TO NEAR DAINGERFIELD. THE STRONGEST
THUNDERSTORMS WERE NEAR NAPLES AND DAINGERFIELD IN MORRIS COUNTY..AND
NEAR_ BOX ELDER IN RED RIVER COUNTY.

MOVEMENT OF THESE THUNDERSTORMS WAS TOWARD THE NORTHEAST AT ABOUT 35
MILES AN HOUR. THESE THUNDERSTORMS MAY CONTAIN GUSTY WINDS AND SOME
SMALL HAIL.
Special weather statement, Apr 11, 11:20 PM CST, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1120 PM CST FRI APR 11 1986

        ...THUNDERSTORMS DEVELOPING ACROSS NORTH TEXAS...

AT 1115 PM CST NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF
THUNDERSTORMS DEVELOPING RAPIDLY FROM NORTHERN TARRANT AND SOUTHERN
DENTON COUNTIES NORTHWESTWARD THROUGH DECATOR AND THEN WESTWARD TO
NEAR JACKSBORO. THE STRONGEST THUNDERSTORMS WERE JUST WEST OF DENTON
AND NEAR ALVORD IN WISE COUNTY.

MOVEMENT OF THESE THUNDERSTORMS WAS TOWARD THE SOUTHEAST AT ABOUT 30
MILES AN HOUR. THESE THUNDERSTORMS ARE DEVELOPING RAPIDLY AND HAVE
THE POTENTIAL TO PRODUCE STRONG WINDS AND HAIL. THE NATIONAL WEATHER
SERVICE WILL BE MONITORING THESE THUNDERSTORMS CLOSELY. LISTEN TO
NOAA WEATHER RADIO OR LOCAL RADIO/TV FOR ADDITIONAL STATEMENTS OR
POSSIBLE WARNINGS.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 11, 11:32 PM CSTSevere Thunderstorm WarningFWDWise58 min
Apr 11, 11:39 PM CSTSevere Thunderstorm WarningFWDDenton51 min
Apr 12, 12:06 AM CSTSevere Thunderstorm WarningFWDCollin24 min
Apr 12, 12:19 AM CSTSevere Thunderstorm WarningFWDDallas, Rockwall11 min
Apr 12, 12:31 AM CSTSevere Thunderstorm WarningFWDTarrant59 min
Apr 12, 12:37 AM CSTSevere Thunderstorm WarningFWDCollin, Hunt53 min
Apr 12, 12:46 AM CSTSevere Thunderstorm WarningFWDHopkins59 min
Apr 12, 12:58 AM CSTSevere Thunderstorm WarningFWDKaufman62 min
Apr 12, 1:10 AM CSTSevere Thunderstorm WarningFWDDallas35 min
Apr 12, 1:21 AM CSTTornado WarningFWDDallas59 min
Apr 12, 1:29 AM CSTSevere Thunderstorm WarningFWDEllis61 min
Apr 12, 1:38 AM CSTSevere Thunderstorm WarningFWDHenderson, Van Zandt62 min
Apr 12, 2:36 AM CSTSevere Thunderstorm WarningFWDSmith54 min
Apr 12, 3:11 AM CSTSevere Thunderstorm WarningFWDHenderson64 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.