Alert archive / Texas / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 57, NWS Fort Worth, TX

April 7, 2004Anderson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 7, 2004, 4:30 PM CDT for Anderson County, Texas. It was in force for 30 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
Apr 7, 2004, 4:30 PM CDT (21:30 UTC)
Expired
Apr 7, 2004, 5:00 PM CDT
In force
30 min
Issued by
NWS Fort Worth, TX
Area
Counties, with a storm outline in the text

County Anderson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 177 km from the middle of the area, began a volume at 21:31 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
Apr 7, 2:45 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.5 hours before the alert went out and 191 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 2004-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 190 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, Fort Worth, TX at 12:00Z on 2004-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.19395878Sfc1 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
190 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
955 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

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.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 7, 2:52 PM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Apr 7, 2:52 PM CDT, 1 hour 38 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
252 PM CDT WED APR 7 2004

.DISCUSSION...
SATELLITE SHOWS UPPER LOW ROTATING NEAR ARDMORE OKLAHOMA AND STILL
MOVING EAST ABOUT 20 MPH.  MID AFTERNOON CONVECTION CONFINED TO
AREAS NORTH OF I-20...BUT THIS SHOULD EXPAND SOUTHWARD ALONG A
SURFACE TROUGH LATE THIS AFTERNOON WHERE HEATING AND CONVERGENCE ARE
AT WORK. THERE IS POTENTIAL FOR SEVERE TSRA (MAINLY HAILERS) EAST OF
A SHERMAN...CORSICANA... FRANKLIN LINE THROUGH EARLY EVENING...THEN
THE ACTIVITY SHOULD MOVE INTO EAST TEXAS.  SOME CONVECTION WILL
LINGER NORTH OF I-20 CLOSE TO THE UPPER LEVEL CIRCULATION AND COLD
CORE.

THURSDAY SHOULD BE NICE AS THIS SYSTEM MOVES FURTHER AWAY.  A
SHORTWAVES IS DUE IN ON FRIDAY WITH ANOTHER SHOT AT TSRA/SHRA FRIDAY
AND FRIDAY NIGHT.  A STRONG COLD FRONT WILL PUSH THROUGH THE CWA
LATE FRIDAY NIGHT/EARLY SATURDAY MORNING...BRINGING QUITE COOLER
CANADIAN AIR TO THE REGION.  ISENTROPIC OVER-RUNNING IS EXPECTED
OVER THE ELEVATED FRONTAL BOUNDARY JUST SOUTH OF OUR CWA SATURDAY
NIGHT.  SOME OF THIS IS EXPECTED TO SPREAD OUR CWA SUNDAY MORNING...
MAINLY OVER THE SOUTHERN HALF WHERE IS WILL BE A COLD RAIN.
PRESSURE GRADIENT BEHIND TO FRONT SATURDAY AND SUNDAY...AND HAVE
NORTH WINDS IN THE 15-25 MPH RANGE THROUGH SUNDAY.  SCATTERED LIGHT
RAIN POSSIBLE EARLY MONDAY MORNING...THEN DRY AND MILD TUESDAY AND
WEDNESDAY. 75

&&

.PRELIM POINT TEMPS/POPS...

DALLAS-FT. WORTH, TX   55  78  56  80 /  20   0  10  30
WACO, TX               55  80  56  82 /   0   0  10  20
PARIS, TX              52  77  54  77 /  60   0  10  30
DENTON, TX             54  78  55  79 /  30   0  10  30
MCKINNEY, TX           53  78  55  79 /  30   0  10  30
DALLAS, TX             55  78  56  80 /  20   0  10  30
TERRELL, TX            54  78  56  80 /  20   0  10  30
CORSICANA, TX          56  80  56  81 /   0   0  10  20
TEMPLE, TX             57  81  56  82 /   0   0  10  20
&&

.FWD WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
&&
Hazardous weather outlook, Apr 7, 4:11 PM CDT, 19 minutes before
HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
411 PM CDT WED APR 7 2004

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-081100-
ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA-
DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON-
HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS-
LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO-
PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT-
WISE-YOUNG-
411 PM CDT WED APR 7 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE NORTHERN AND
EASTERN PARTS OF NORTH TEXAS...ALL OF NORTH TEXAS EXCEPT FOR THAT
AREA THAT IS BOTH SOUTH OF I-20 AND WEST OF I-35. CLOUD TO GROUND
LIGHTNING...BRIEF HEAVY RAIN WILL ACCOMPANY SOME OF THE STORMS.
A FEW OF THE THUNDERSTORMS EAST OF INTERSTATE 35 WILL MAY BE
SEVERE THIS EVENING...PRODUCING HAIL TO 1 INCH IN DIAMETER AND
DAMAGING DOWNBURST WINDS.

.DAYS TWO THROUGH SEVEN...
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THURSDAY NIGHT THROUGH
SATURDAY NIGHT. A FEW STORMS COULD BECOME SEVERE FRIDAY AFTERNOON
AND EVENING.

.SPOTTER CALL TO ACTION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUESTED THROUGH 9 PM EAST OF THE I-35
CORRIDOR.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 7:14 PM CDTTornado WarningFWDWise46 min
Apr 6, 7:35 PM CDTSevere Thunderstorm WarningFWDTarrant55 min
Apr 6, 7:38 PM CDTSevere Thunderstorm WarningFWDDenton67 min
Apr 6, 8:26 PM CDTSevere Thunderstorm WarningFWDTarrant64 min
Apr 6, 8:42 PM CDTSevere Thunderstorm WarningFWDDenton63 min
Apr 7, 4:24 PM CDTSevere Thunderstorm WarningFWDAnderson36 min
Apr 7, 4:52 PM CDTSevere Thunderstorm WarningFWDLeon38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2004Every severe thunderstorm warning in 2004

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.