Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 165, NWS Shreveport, LA

May 9, 2009Bowie County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 9, 2009, 10:21 PM CDT for Bowie County, Texas. It was in force for 24 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 9, 2009, 10:21 PM CDT (03:21 UTC)
Expired
May 9, 2009, 10:45 PM CDT
In force
24 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon

County Bowie County, TX

The radar

The Shreveport radar (KSHV), 123 km from the middle of the area, began a volume at 03:22 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, 3.4 hours before the alert went out and 124 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, Shreveport, LA at 00:00Z on 2009-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1854 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, Shreveport, LA at 00:00Z on 2009-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.193958Sfc1 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
1854 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
737 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
1.5
Supercell composite
8.2

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 9, 8:12 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, May 9, 8:12 PM CDT, 2 hours 9 minutes before
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Hazardous weather outlook, May 9, 11:46 AM CDT, 10 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1146 AM CDT SAT MAY 9 2009

ARZ050-051-059>061-070>073-LAZ001>006-010>014-OKZ077-TXZ096-097-
108>112-124>126-136>138-149>151-101200-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-
UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-MCCURTAIN-
BOWIE-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-
GREGG-HARRISON-CHEROKEE-RUSK-PANOLA-
1146 AM CDT SAT MAY 9 2009

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

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

STRONG TO SEVERE THUNDERSTORMS MAY DEVELOP EARLY THIS
AFTERNOON...ALONG AND NORTH OF I 20...WHERE A FRONTAL BOUNDARY
LIES. THE THREAT WILL SHIFT TO JUST SOUTH OF I 20 AS THE FRONT
SLOWLY DIPS SOUTHWARD THIS EVENING. STRONG INSTABILITY FROM
DAYTIME HEATING WILL AID IN THUNDERSTORM INITIATION THIS AFTERNOON.
EVEN WITH THE LOSS OF DAYTIME HEATING...EXPECT THUNDERSTORMS TO
CONTINUE AS THE LOW LEVEL JET KICKS IN TONIGHT...WITH LOCALLY
HEAVY RAINFALL AND THE POSSIBILITY FOR LARGE HAIL AND DAMAGING
WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THE SEVERE WEATHER AND HEAVY RAINFALL THREAT WILL CONTINUE THROUGH
AT LEAST SUNDAY NIGHT. FLASH FLOODING WILL BE A POSSIBILITY...
CONSIDERING THE RAINFALL EARLIER IN THE MONTH.

ANOTHER STORM SYSTEM AND ASSOCIATED COLD FRONT WILL ARRIVE LATE ON
WEDNESDAY INTO THURSDAY WITH YET ANOTHER POSSIBILITY OF STRONG TO
SEVERE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

LAZ017>022-TXZ152-153-165>167-101200-
SABINE LA-NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-NACOGDOCHES-
SHELBY-ANGELINA-SAN AUGUSTINE-SABINE TX-
1146 AM CDT SAT MAY 9 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
LOUISIANA...NORTHWEST LOUISIANA AND EAST TEXAS.

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

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS MAY DEVELOP THIS
AFTERNOON...AS A SOUTHWARD MOVING COLD FRONT ENTERS A MODERATELY
UNSTABLE ENVIRONMENT. THIS ACTIVITY WILL LIKELY DISSIPATE SHORTLY
AFTER SUNSET.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORMS ARE EXPECTED TO DEVELOP ONCE AGAIN SUNDAY AND
MONDAY...AS THE FRONTAL BOUNDARY CONTINUES TO SLOWLY PUSH
SOUTHWARD. SOME STORMS MAY REACH SEVERE LIMITS...WITH LARGE HAIL
AND DAMAGING WINDS AS THE MAIN THREATS.

ANOTHER STORM SYSTEM AND ASSOCIATED COLD FRONT WILL ARRIVE LATE ON
WEDNESDAY INTO THURSDAY WITH YET ANOTHER POSSIBILITY OF STRONG TO
SEVERE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED THIS AFTERNOON OR TONIGHT.

12

In the hours before

Local storm report, May 9, 5:54 PM CDT, 4 hours 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
554 PM CDT SAT MAY 09 2009

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

0259 PM     TSTM WND DMG     GARLAND                 33.36N 93.71W
05/09/2009                   MILLER             AR   LAW ENFORCEMENT

            TREES AND POWERLINES DOWNED ALONG HWY 196 AND 134

0300 PM     TSTM WND DMG     KIBLAH                  33.05N 93.90W
05/09/2009                   MILLER             AR   LAW ENFORCEMENT

            TREE DOWNED ON HWY 71 NEAR THE LOUISIANA/ARKANSAS STATE
            LINE

&&

12
Local storm report, May 9, 6:40 PM CDT, 3 hours 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
640 PM CDT SAT MAY 09 2009

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

0440 PM     TSTM WND DMG     1 NE HUTTIG             33.05N 92.17W
05/09/2009                   UNION              AR   LAW ENFORCEMENT

            TREE DOWN OVER THE ROAD BETWEEN THE COMMUNITIES OF HUTTIG
            AND FELSENTHAL.

&&

15
Local storm report, May 9, 6:50 PM CDT, 3 hours 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
650 PM CDT SAT MAY 09 2009

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

0215 PM     TSTM WND DMG     8 E ASHDOWN             33.67N 93.99W
05/09/2009                   LITTLE RIVER       AR   LAW ENFORCEMENT

            TREES DOWN ALL AROUND MILLWOOD LAKE

&&

12
Special weather statement, May 9, 8:23 PM CDT, 1 hour 58 minutes before
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Local storm report, May 9, 9:18 PM CDT, 1 hour 3 minutes before
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Local storm report, May 9, 9:46 PM CDT, 35 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 10:16 PM CDTFlash Flood WarningSHVBowie3 hr
May 9, 10:41 PM CDTSevere Thunderstorm WarningSHVBowie64 min
May 10, 1:05 AM CDTSevere Thunderstorm WarningSHVRed River55 min
May 10, 1:50 AM CDTSevere Thunderstorm WarningSHVRed River55 min
May 10, 2:05 AM CDTFlash Flood WarningSHVRed River12 hr
May 10, 6:31 AM CDTFlash Flood WarningSHVBowie8 hr
May 10, 10:00 AM CDTRiver Flood WarningSHVBowie, Red River6 days
May 10, 11:20 AM CDTRiver Flood WarningSHVBienville, Bossier, Red River, Webster7 days
May 10, 11:22 AM CDTRiver Flood WarningSHVBienville, Bossier, Caddo, Natchitoches, Red River6 days
May 10, 11:22 AM CDTRiver Flood WarningSHVGrant, Natchitoches, Red River10 days
May 10, 1:12 PM CDTSevere Thunderstorm WarningSHVWinn48 min
May 10, 3:16 PM CDTTornado WarningSHVBienville, Jackson, Natchitoches, Red River, Winn29 min
May 10, 3:43 PM CDTTornado WarningSHVBienville, Jackson, Natchitoches, Winn47 min
May 10, 4:29 PM CDTTornado WarningSHVGrant, Natchitoches, Winn46 min
May 10, 4:55 PM CDTTornado WarningSHVNatchitoches, Red River35 min
May 10, 5:18 PM CDTSevere Thunderstorm WarningSHVCaldwell, Grant, LaSalle, Winn42 min
May 10, 5:39 PM CDTSevere Thunderstorm WarningSHVBienville, Natchitoches, Red River51 min
May 10, 6:07 PM CDTSevere Thunderstorm WarningSHVDe Soto, Natchitoches, Red River38 min
May 10, 6:40 PM CDTSevere Thunderstorm WarningSHVCaldwell35 min
May 10, 12:58 AM CDTSevere Thunderstorm WarningSHVHoward, Sevier32 min
May 10, 2:36 AM CDTSevere Thunderstorm WarningSHVHempstead, Howard54 min
May 10, 3:21 AM CDTSevere Thunderstorm WarningSHVNevada54 min
May 10, 4:57 AM CDTSevere Thunderstorm WarningSHVHempstead, Little River63 min
May 10, 5:38 AM CDTSevere Thunderstorm WarningSHVHempstead, Nevada52 min
May 10, 7:26 AM CDTFlash Flood WarningSHVNevada7 hr
May 10, 9:58 AM CDTRiver Flood WarningSHVHoward, Little River, Sevier6 days
May 10, 2:17 PM CDTFlash Flood WarningSHVHempstead, Howard, Little River, Sevier4 hr
May 10, 4:03 PM CDTFlash Flood WarningSHVNevada57 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009

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.