Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 100, NWS Shreveport, LA

April 17, 2007Cherokee County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 17, 2007, 9:09 PM CDT for Cherokee County, Texas. It was in force for 61 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 17, 2007, 9:09 PM CDT (02:09 UTC)
Expired: Apr 17, 2007, 10:10 PM CDT
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Cherokee County, TX

The radar

The Shreveport radar (KSHV), 142 km from the middle of the area, began a volume at 02:08 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

Shreveport, LA (KSHV), launched 00:00Z, 2.2 hours before the alert went out and 151 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1601 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 17, 8:50 PM CDT, 19 minutes earlier.

Area forecast discussion, Apr 17, 8:50 PM CDT, 19 minutes before

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Hazardous weather outlook, Apr 17, 12:00 PM CDT, 9 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1200 PM CDT TUE APR 17 2007

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-181100-
ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE-
CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD-
HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION-
MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA-
PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX-
SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR-
WEBSTER-WINN-WOOD-
1200 PM CDT TUE APR 17 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST OKLAHOMA...NORTHEAST
TEXAS...SOUTHWEST ARKANSAS...NORTHWEST AND NORTH CENTRAL LOUISIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

AN UPPER LEVEL STORM SYSTEM WILL APPROACH THE FOUR STATE AREA
TODAY...AND MOVE THROUGH THE REGION OVERNIGHT.  THUNDERSTORMS
WILL BEGIN TO DEVELOP ACROSS NORTHEAST TEXAS BY LATE AFTERNOON OR
EARLY EVENING. DUE TO VERY COLD AIR ALOFT...LARGE HAIL MAY OCCUR
WITH THESE STORMS. A FEW DAMAGING WIND GUSTS ARE ALSO POSSIBLE.
THESE STORMS WILL GRADUALLY WEAKEN AS THEY MOVE EAST INTO NORTH
LOUISIANA AND SOUTHWEST ARKANSAS...AND LIKELY FALL TO BELOW
SEVERE LIMITS BY MIDNIGHT AS THEY MOVE EAST.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

THE SEVERE THUNDERSTORM THREAT APPEARS RATHER MARGINAL...
HOWEVER...ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND
STORM SPOTTERS REMAINS A POSSIBILITY FOR MAINLY NORTHEAST TEXAS
PORTIONS OF THE AREA THIS EVENING.

VII

In the hours before

Local storm report, Apr 17, 4:13 PM CDT, 4 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
413 PM CDT TUE APR 17 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0950 PM     HAIL             LINDALE                 32.51N 95.41W
04/13/2007  E0.75 INCH       SMITH              TX   TRAINED SPOTTER

&&

BPARKER

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 17, 8:49 PM CDT	Severe Thunderstorm Warning	SHV	Smith	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.