Alert archive / Texas / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 13, NWS Amarillo, TX

April 21, 1994Carson County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 21, 1994, 4:38 PM CDT for Carson County, Texas. It was in force for 67 min.

The area

The counties it named.

The facts

Issued
Apr 21, 1994, 4:38 PM CDT (21:38 UTC)
Expired
Apr 21, 1994, 5:45 PM CDT
In force
67 min
Issued by
NWS Amarillo, TX
Area
Whole counties

County Carson County, TX

The radar

The Amarillo radar (KAMA), 37 km from the middle of the area, began a volume at 21:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.6 hours before the alert went out and 37 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, Amarillo Airport, TX at 12:00Z on 1994-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 253 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, Amarillo Airport, TX at 12:00Z on 1994-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939Sfc1 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
253 J/kg
Mixed-layer CIN
-223 J/kg
Mixed-layer LCL
1280 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAMA 212139
SVRAMA
TXC065-212245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
438 PM CDT THU APR 21 1994
 
THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM CDT
FOR THE PEOPLE IN THE FOLLOWING LOCATION...
 
IN THE TEXAS PANHANDLE
 
   ...WESTERN CARSON COUNTY
 
AT 437 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM JUST SOUTH OF FRITCH. THIS STORM WAS MOVING SOUTH
SOUTHEAST AT 5 MILES AN HOUR.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.  IF
OUTSIDE...MOVE TO SHELTER...PREFERABLY INSIDE A STRONG BUILDING.

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 21, 12:58 PM CDT, 3 hours 40 minutes before
OKZ001>003-TXZ001>026-220500-

TEXAS/OKLAHOMA PANHANDLES THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
100 PM CDT THU APR 21 1994

A SLIGHT CHANCE OF THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND
EVENING ACROSS THE EASTERN TWO-THIRDS OF THE TEXAS AND OKLAHOMA PANHANDLES.
HOWEVER...NONE OF THE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE.

SOUTHERLY WINDS OVERNIGHT HAVE PULLED LOW LEVEL MOISTURE BACK ACROSS THE
EASTERN TWO-THIRDS OF PANHANDLES WITH DEWPOINTS IN THE 50S GENERALLY EAST
OF A LINE FROM GUYMON TO HEREFORD.

THE RELATIVELY MOIST AND UNSTABLE SOUTHWEST WINDS WILL COLLIDE WITH A
NEARLY STATIONARY SURFACE BOUNDARY ACROSS THE OKLAHOMA AND EXTREME NORTHERN
TEXAS PANHANDLES TO PRODUCE ISOLATED THUNDERSTORMS BY 4 PM.  SINCE THE
AIRMASS ACROSS THE CENTRAL AND EASTERN PANHANDLES WILL ONLY BECOME
MARGINALLY UNSTABLE AND LITTLE IF ANY UPPER LEVEL SUPPORT EXISTS...NONE OF
THE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE.H

SPOTTER ACTIVATION IS NOT LIKELY THIS AFTERNOON OR EVENING.

DH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 3:46 PM CDTSevere Thunderstorm WarningAMAGray59 min
Apr 21, 3:48 PM CDTSevere Thunderstorm WarningAMARandall25 min
Apr 21, 4:55 PM CDTSevere Thunderstorm WarningAMAHemphill, Lipscomb50 min
Apr 21, 4:59 PM CDTSevere Thunderstorm WarningAMAPotter46 min
Apr 21, 5:57 PM CDTSevere Thunderstorm WarningAMAHemphill48 min
Apr 21, 6:48 PM CDTSevere Thunderstorm WarningAMAHemphill42 min

Nearby

Severe Thunderstorm Warnings in Texas, 1994Every severe thunderstorm warning in 1994

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; radar from the NEXRAD Level II archive.