Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 39, NWS Fort Worth, TX

January 11, 1998Van Zandt County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jan 11, 1998, 4:46 PM CST for Van Zandt County, Texas. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 11, 1998, 4:46 PM CST (22:46 UTC)
Expired
Jan 11, 1998, 5:15 PM CST
In force
29 min
Issued by
NWS Fort Worth, TX
Area
Whole counties

County Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 137 km from the middle of the area, began a volume at 22:50 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jan 11, 1:15 PM CSTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.8 hours before the alert went out and 139 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, Fort Worth, TX at 12:00Z on 1998-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Fort Worth, TX at 12:00Z on 1998-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 474 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
458 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
474 m²/s²
0-3 km storm-relative helicity
533 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

874 
WUUS1 KFTW 112247 RRA
SVRFTW
TXC467-112315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
446 PM CST SUN JAN 11 1998
 
THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  515 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST TEXAS
 
   ...VAN ZANDT COUNTY
 
AT 448 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT FIVE
MILES NORTHEAST OF CANTON MOVING NORTHEAST AT 35 MPH. LARGE HAIL IS
LIKELY WITH THIS STORM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
 
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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, Jan 11, 12:05 PM CST, 4 hours 41 minutes before
TXZ095-106-107-122-123-135-147-148-162-120030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1205 PM CST SUN JAN 11 1998

THERE IS SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY OVER CENTRAL AND
EAST TEXAS GENERALLY EAST OF A PARIS TO CANTON TO FAIRFIELD TO
CENTERVILLE LINE.  THE RISK AREA INCLUDES THE CITIES OF SULPHUR
SPRINGS...ATHENS AND PALESTINE.  THE MAIN SEVERE WEATHER THREAT WILL
BE LARGE HAIL AND DAMAGING DOWNBURSTS...WITH THE POSSIBILITY OF
ISOLATED TORNADOES.

A WARM FRONTAL BOUNDARY EXTENDED FROM TEXARKANA TO WACO AND THEN
CURVED WESTWARD.  WARM...MOIST AND UNSTABLE AIR WILL CONTINUE TO FLOW
NORTHWARD INTO EAST AND CENTRAL TEXAS FROM THE SOUTH AND THEN BE
LIFTED OVER THE  FRONTAL BOUNDARY.  THUNDERSTORMS HAVE DEVELOPED
ALONG AND NORTH OF THE WARM FRONTAL BOUNDARY AND ARE EXPECTED TO
CONTINUE THROUGH THE AFTERNOON.  OTHER THUNDERSTORMS ARE EXPECTED
SOUTH OF THE FRONT AS AFTERNOON HEATING INCREASES.  AN UPPER AIR
DISTURBANCE IS MOVING FROM WEST TEXAS INTO NORTH TEXAS THIS AFTERNOON
AND WILL HELP TO INTENSIFY THUNDERSTORMS.  FAVORABLE WIND PROFILES
AND ELEVATED INSTABILITY COULD COMBINE TO CAUSE A FEW OF THE
THUNDERSTORMS TO BECOME SEVERE.

THE MAIN THREAT FOR SEVERE THUNDERSTORMS WILL BE FROM NOON TO 5
PM...THEN THE THREAT SHOULD DIMINISH AS THE UPPER AIR DISTURBANCE
MOVES INTO EAST TEXAS.  EMERGENCY MANAGERS AND STORM SPOTTER GROUPS
IN THE RISK AREA SHOULD BE ON STANDBY FOR POSSIBLE ACTIVATION ANYTIME
THIS AFTERNOON.
Special weather statement, Jan 11, 12:05 PM CST, 4 hours 41 minutes before
TXZ095-106-107-122-123-135-147-148-162-120030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1205 PM CST SUN JAN 11 1998

THERE IS SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY OVER CENTRAL AND
EAST TEXAS GENERALLY EAST OF A PARIS TO CANTON TO FAIRFIELD TO
CENTERVILLE LINE.  THE RISK AREA INCLUDES THE CITIES OF SULPHUR
SPRINGS...ATHENS AND PALESTINE.  THE MAIN SEVERE WEATHER THREAT WILL
BE LARGE HAIL AND DAMAGING DOWNBURSTS...WITH THE POSSIBILITY OF
ISOLATED TORNADOES.

A WARM FRONTAL BOUNDARY EXTENDED FROM TEXARKANA TO WACO AND THEN
CURVED WESTWARD.  WARM...MOIST AND UNSTABLE AIR WILL CONTINUE TO FLOW
NORTHWARD INTO EAST AND CENTRAL TEXAS FROM THE SOUTH AND THEN BE
LIFTED OVER THE  FRONTAL BOUNDARY.  THUNDERSTORMS HAVE DEVELOPED
ALONG AND NORTH OF THE WARM FRONTAL BOUNDARY AND ARE EXPECTED TO
CONTINUE THROUGH THE AFTERNOON.  OTHER THUNDERSTORMS ARE EXPECTED
SOUTH OF THE FRONT AS AFTERNOON HEATING INCREASES.  AN UPPER AIR
DISTURBANCE IS MOVING FROM WEST TEXAS INTO NORTH TEXAS THIS AFTERNOON
AND WILL HELP TO INTENSIFY THUNDERSTORMS.  FAVORABLE WIND PROFILES
AND ELEVATED INSTABILITY COULD COMBINE TO CAUSE A FEW OF THE
THUNDERSTORMS TO BECOME SEVERE.

THE MAIN THREAT FOR SEVERE THUNDERSTORMS WILL BE FROM NOON TO 5
PM...THEN THE THREAT SHOULD DIMINISH AS THE UPPER AIR DISTURBANCE
MOVES INTO EAST TEXAS.  EMERGENCY MANAGERS AND STORM SPOTTER GROUPS
IN THE RISK AREA SHOULD BE ON STANDBY FOR POSSIBLE ACTIVATION ANYTIME
THIS AFTERNOON.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 11, 1:04 PM CSTSevere Thunderstorm WarningFWDDallas56 min
Jan 11, 1:26 PM CSTSevere Thunderstorm WarningFWDSomervell64 min
Jan 11, 4:58 PM CSTSevere Thunderstorm WarningFWDHenderson32 min
Jan 11, 5:25 PM CSTSevere Thunderstorm WarningFWDHenderson35 min

Nearby

Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998

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.