Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 330, NWS Shreveport, LA

May 22, 2008Harrison County, Marion County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 22, 2008, 3:30 PM CDT for Harrison County, Marion County, Texas. It was in force for 45 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: May 22, 2008, 3:30 PM CDT (20:30 UTC)
Expired: May 22, 2008, 4:15 PM CDT
In force: 45 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Harrison County, TX, Marion County, TX

The radar

The Shreveport radar (KSHV), 55 km from the middle of the area, began a volume at 20:33 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 12:00Z, 8.5 hours before the alert went out and 61 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: 1485 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -30 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 May 22, 10:53 AM CDT, 4 hours 37 minutes earlier.

Area forecast discussion, May 22, 10:53 AM CDT, 4 hours 37 minutes before

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Hazardous weather outlook, May 22, 1:49 PM CDT, 1 hour 41 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
149 PM CDT THU MAY 22 2008

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-231100-
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-
149 PM CDT THU MAY 22 2008

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

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

SCATTERED SHOWERS AND THUNDERSTORMS WILL INCREASE ACROSS THE
EAST TEXAS LAKES AREA BY EARLY THIS AFTERNOON...AS A WEAK UPPER
LEVEL DISTURBANCE FROM SOUTH TEXAS...MOVES NORTHEAST INTO THE
AREA. MORE ISOLATED DEVELOPMENT CAN BE EXPECTED LATER IN THE
AFTERNOON NORTH OF INTERSTATE 20. WITH THE STRONG INSTABILITY
PRESENT...AN ISOLATED STORM COULD BECOME SEVERE...PRODUCING HAIL AND
BRIEF DAMAGING WIND GUSTS. HOWEVER...FOR THE MOST PART...FREQUENT
DEADLY LIGHTNING CAN BE EXPECTED WITH THUNDERSTORMS...WITH THE
OVERALL THREAT OF SEVERE WEATHER APPEARING MINIMAL.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER...HAM RADIO OPERATOR...AND EMERGENCY MANAGEMENT
PERSONNEL ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR
TONIGHT.

VII

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 4:17 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Marion	43 min
May 22, 4:30 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion	45 min
May 22, 5:13 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	32 min
May 22, 2:18 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Winn	57 min
May 22, 3:39 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Grant, Jackson, Natchitoches, Winn	36 min
May 22, 4:01 PM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle	44 min
May 22, 4:10 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	35 min
May 22, 5:50 PM CDT	Severe Thunderstorm Warning	SHV	Union	40 min
May 22, 4:34 PM CDT	Severe Thunderstorm Warning	SHV	Columbia	41 min
May 22, 5:04 PM CDT	Severe Thunderstorm Warning	SHV	Miller	41 min
May 22, 5:18 PM CDT	Severe Thunderstorm Warning	SHV	Nevada	27 min
May 22, 5:31 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Nevada	29 min
May 22, 5:42 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Miller, Nevada, Sevier	48 min
May 22, 6:19 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Sevier	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.