Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 33, NWS Shreveport, LA

March 25, 2009Sabine County, San Augustine County, Shelby County, Texas; Sabine Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 25, 2009, 7:56 PM CDT for Sabine County, San Augustine County, Shelby County, Texas; Sabine Parish, Louisiana. It was in force for 49 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: Mar 25, 2009, 7:56 PM CDT (00:56 UTC)
Expired: Mar 25, 2009, 8:45 PM CDT
In force: 49 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Sabine Parish, LA, Sabine County, TX, San Augustine County, TX, Shelby County, TX

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 25, 5:40 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.9 hours before the alert went out and 108 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: 462 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 694 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Mar 25, 3:02 PM CDT, 4 hours 54 minutes earlier.

Area forecast discussion, Mar 25, 3:02 PM CDT, 4 hours 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
302 PM CDT WED MAR 25 2009

.DISCUSSION...

THREE ROUNDS OF SEVERE WEATHER POSSIBLE THROUGH FRIDAY.

A TRANSITORY WEATHER PATTERN IS IN PLACE ACROSS THE FOUR STATE REGION.
ALL INGREDIENTS ARE LINING UP FOR WET AND STORMY CONDITIONS
THROUGH EARLY SATURDAY MORNING.

STARTING WITH TONIGHT...A FRONT REMAINS STALLED ACROSS SOUTHERN
LOUISIANA EXTENDING FROM JUST NORTH OF LAKE CHARLES TO BATON
ROUGE LOUISIANA. LATEST OBSERVATIONS INDICATE THAT THE FRONT MAY
BE LIFTING NORTHWARD AS A WARM FRONT. LOW LEVEL SHEAR ASSOCIATED
WITH THE FRONT...AS IT MOVES NORTHWARD...WILL LIKELY SUPPORT A
SEVERE WEATHER THREAT FOR THE FOUR STATE REGION THIS EVENING. THIS
WILL COINCIDE WITH AN UPPER LEVEL SHORTWAVE PROGGED TO SLIDE
EASTWARD ACROSS THE REGION THROUGH 06Z THURSDAY. LINEAR CONVECTION
HAS ALSO BEEN NOTED ACROSS MUCH OF CENTRAL TEXAS TODAY. ORIGINALLY
INITIATING AS ISOLATED SUPERCELLS...THESE STORMS HAVE INCREASED IN
COVERAGE AND ARE NOW BEGINNING TO AFFECT TYLER AND LONGVIEW.
DAMAGING WINDS...TORNADOS...AND HAIL WILL BE THE MAIN THREAT WITH
THIS ACTIVITY. SEVERE WEATHER WATCHES COVER AREAS WEST OF THE CWA
AT THIS TIME. THE SITUATION CONTINUES TO BE CLOSELY MONITORED FOR
A POSSIBLE WATCH ISSUANCE LATER THIS AFTERNOON OR THIS EVENING.

BY THURSDAY NIGHT...TEMPS AND DEWPOINTS WILL HAVE INCREASED ACROSS
MUCH OF THE REGION AS THE FRONT LIFTS NORTHWARD. HOWEVER...THE
FRONT IS PROGGED TO REMAIN CLOSE ENOUGH TO SERVE AS AN INITIATOR
FOR AN ADDITIONAL ROUND OF SEVERE WEATHER AS AN UPPER LEVEL
IMPULSE APPROACHES THE REGION. THIS SHOULD ALL CONCLUDE BY 12Z
FRIDAY.

FRIDAY AFTERNOON...THE THIRD AND FINAL SEVERE WEATHER THREAT IS
PROGGED TO OCCUR DURING THE LATE AFTERNOON AND EARLY EVENING HOURS
ON FRIDAY. THIS IS FORECAST TO HAVE SIGNIFICANT UPPER LEVEL
SUPPORT AS A MID LEVEL LOW BARRELS ACROSS THE REGION. WITH A 100+
KT ASSOCIATED JET...PLENTY OF INSTABILITY WILL EXIST TO PROMOTE
THE STRONGEST STORMS OF THE WEEK.

ADDITIONALLY...PERIODS OF LOCALLY HEAVY RAINS CAN BE EXPECTED WITH
THESE STORMS. IN THE EVENT OF TRAINING STORMS...PONDING OF
ROADWAYS CAN ALSO BE EXPECTED.

BEYOND FRIDAY...THE WEEKEND WILL BE CHARACTERIZED BY HIGH PRESSURE
AND MOSTLY CLEAR SKIES. THE NEXT WEATHER SYSTEM IS PROGGED TO MOVE
THROUGH THE REGION LATE MONDAY NIGHT. /05/

&&

.AVIATION...
SHORTWAVE TROUGH HAS EJECTED ACROSS THE SOUTHERN PLAINS...AND SHOULD
TRAVERSE THE REGION TONIGHT.  IN RESPONSE...AREA RADARS SHOW THAT
SHRA/TSRA HAVE DEVELOPED ACROSS N TX THIS AFTERNOON.  GIVEN THE
MOSTLY ELEVATED NATURE OF THE CONVECTION...SOME OF THE STORMS HAVE
PRODUCED SOME GR.

EXPECT SHRA/TSRA TO GRADUALLY SPREAD ACROSS SE OK/E TX TERMINALS
THROUGH 26/0000 UTC...THEN ACROSS S AR/N LA AIRPORTS BETWEEN
26/0000-0300 UTC.  FLIGHT CATEGORIES WILL GRADUALLY LOWER TO MVFR
DUE TO LOW CIGS IN VICINITY OF SHRA/TSRA.  THE LOW FLIGHT
CATEGORIES SHOULD THEN SPREAD N/E ACROSS AREA TERMINALS WITH THE
CONVECTION.  MVFR/IFR CIGS WILL LIKELY CONTINUE INTO THURSDAY
MORNING...UNTIL THE FRONT STARTS LIFTING N IN EARNEST TOWARD 26/1800
UTC.

AFTER THIS ROUND...I WILL CONTINUE THE RELATIVELY DRY TREND IN THE
TAFS THROUGH 27/0000 UTC.  THE GREATEST RISK OF ADDITIONAL SHRA/TSRA
WILL LIKELY COME AFTER THE END OF THE UPCOMING TAF PACKAGE.  /BUTTS/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  53  77  60  74  46 /  90  40  70  70  60
MLU  53  77  58  78  50 /  90  40  70  70  60
DEQ  44  71  55  64  40 /  90  30  70  70  40
TXK  49  74  57  69  45 /  90  30  70  70  60
ELD  50  74  58  73  45 /  90  30  70  70  60
TYR  54  77  61  75  42 /  90  60  70  70  40
GGG  54  76  59  74  44 /  90  60  70  70  40
LFK  59  81  63  78  41 /  90  70  70  70  50

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
LA...NONE.
OK...NONE.
TX...NONE.
&&

05/21

Hazardous weather outlook, Mar 25, 11:51 AM CDT, 8 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1151 AM CDT WED MAR 25 2009

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-261100-
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-SABINE LA-
NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE-
FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-
HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-
SAN AUGUSTINE-SABINE TX-
1151 AM CDT WED MAR 25 2009

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...

AN UPPER LEVEL DISTURBANCE WILL INTERACT WITH A WARM FRONT
FORECAST TO PUSH NORTHWARD ACROSS SOUTHEAST TEXAS AND SOUTHERN
LOUISIANA THIS AFTERNOON. THIS WILL ALLOW FOR THE DEVELOPMENT OF
THUNDERSTORMS ACROSS THE FOUR STATE REGION. A FEW OF THESE STORMS
MAY DEVELOP INTO SUPERCELL THUNDERSTORMS...CAPABLE OF PRODUCING
LARGE HAIL...DAMAGING WINDS AND ISOLATED TORNADOES. THESE STORMS
ARE CURRENTLY DEVELOPING ACROSS CENTRAL TEXAS...AND ARE EXPECTED
TO PUSH INTO FAR EAST TEXAS...EXTREME SOUTHEAST OKLAHOMA...SOUTHERN
ARKANSAS AND NORTHWEST LOUISIANA DURING THE EARLY EVENING HOURS.
HEAVY RAIN RESULTING IN LOCALIZED FLASH FLOODING IS ALSO A THREAT
AS THUNDERSTORMS MAY TRAIN OVER THE SAME AREAS FOR EXTENDED
PERIODS OF TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

ANOTHER DISTURBANCE WILL PUSH OUT OF THE BIG BEND REGION OF TEXAS
ON THURSDAY...MOVING INTO DEEP EAST TEXAS. THIS SYSTEM WILL AGAIN
TRIGGER THUNDERSTORMS...A FEW OF WHICH MAY PRODUCE LARGE HAIL AND
DAMAGING WINDS.

A VERY STRONG UPPER LEVEL DISTURBANCE IS EXPECTED TO PUSH OUT OF
THE ROCKIES AND CROSS ALONG THE RED RIVER VALLEY ON FRIDAY. THIS
SYSTEM IS EXPECTED TO BE THE MOST POTENT SEVERE WEATHER THREAT TO
AFFECT THE FOUR STATE REGION THIS SPRING. THE THREAT EXISTS FOR
SUPERCELL THUNDERSTORMS ON FRIDAY...PRODUCING LARGE HAIL...DAMAGING
WINDS AND POSSIBLY TORNADOES.

.SPOTTER INFORMATION STATEMENT...
ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL...WILL LIKELY BE NEEDED THIS AFTERNOON
AND EVENING.

05

In the hours before

Local storm report, Mar 25, 2:03 PM CDT, 5 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
203 PM CDT WED MAR 25 2009

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

1110 PM     TORNADO          1 WNW JONESBORO         32.24N 92.73W
03/24/2009                   JACKSON            LA   NWS STORM SURVEY

            AN EF1 TORNADO OCCURRED FROM 1 MILE WNW OF JONESBORO TO 1
            MILE N OF JONESBORO. DAMAGE PATH LENGTH WAS 1 MILE AND
            THE PATH WIDTH WAS 80 YARDS.

&&

03

Special weather statement, Mar 25, 5:42 PM CDT, 2 hours 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
542 PM CDT WED MAR 25 2009

TXZ126-137-138-150-151-252330-
GREGG-HARRISON-MARION-PANOLA-RUSK-
542 PM CDT WED MAR 25 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 630 PM CDT...FOR THE FOLLOWING
COUNTIES...

IN NORTHEAST TEXAS...
     MARION...HARRISON...GREGG...RUSK AND PANOLA...

INCLUDING THE FOLLOWING LOCATIONS...
     BECKVILLE...HALLSVILLE...HARLETON...HENDERSON...JEFFERSON...
     JOINERVILLE...KILGORE...LONGVIEW...MARSHALL...MINDEN...NEW
     LONDON...OVERTON...PINEHILL...TATUM...TURNERTOWN AND WOODLAWN...

AT 539 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES SOUTHEAST OF
DIANA TO 8 MILES SOUTHEAST OF TROUP...OR ALONG A LINE EXTENDING FROM
8 MILES NORTHEAST OF LONGVIEW TO 13 MILES EAST OF
JACKSONVILLE...MOVING EAST NORTHEAST AT 45 MPH.

PEA SIZE HAIL IS EXPECTED WITH THESE STORMS.

PARKER

Special weather statement, Mar 25, 6:02 PM CDT, 1 hour 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
602 PM CDT WED MAR 25 2009

TXZ149-252330-
CHEROKEE-
602 PM CDT WED MAR 25 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 630 PM CDT...FOR THE FOLLOWING
COUNTY...

IN NORTHEAST TEXAS...
     CHEROKEE...

INCLUDING THE FOLLOWING LOCATIONS...
     ALTO...MORRILL...PONTA AND RUSK...

AT 601 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR ALTO...OR 9 MILES SOUTH OF RUSK...MOVING
NORTHEAST AT 45 MPH.

PEA SIZE HAIL IS EXPECTED WITH THIS STORM.

PARKER

Local storm report, Mar 25, 7:43 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
743 PM CDT WED MAR 25 2009

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

0645 PM     TSTM WND DMG     7 NW GREENWOOD          32.51N 94.06W
03/25/2009                   HARRISON           TX   LAW ENFORCEMENT

            NUMEROUS TREES DOWN

0715 PM     TSTM WND DMG     HAUGHTON                32.53N 93.51W
03/25/2009                   BOSSIER            LA   LAW ENFORCEMENT

            NUMEROUS TREES DOWN

0715 PM     HAIL             HAUGHTON                32.53N 93.51W
03/25/2009  M0.88 INCH       BOSSIER            LA   LAW ENFORCEMENT

&&

ASTEVENS

Local storm report, Mar 25, 7:51 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
751 PM CDT WED MAR 25 2009

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

0735 PM     TSTM WND DMG     HAUGHTON                32.53N 93.51W
03/25/2009                   BOSSIER            LA   AMATEUR RADIO

            LARGE TREE FELL OVER ON HOUSE ON LAWRENCE DR.

0715 PM     TSTM WND DMG     MANSFIELD               32.03N 93.70W
03/25/2009                   DE SOTO            LA   AMATEUR RADIO

            LARGE TREE FELL ON HOUSE ON JULIAN ST.

&&

ASTEVENS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 7:07 PM CDT	Tornado Warning	SHV	Nacogdoches, Sabine, San Augustine, Shelby	23 min
Mar 25, 7:28 PM CDT	Severe Thunderstorm Warning	SHV	Panola, San Augustine, Shelby	47 min
Mar 25, 7:38 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	37 min
Mar 26, 4:40 AM CDT	Dense Fog Advisory	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	5 hr
Mar 26, 10:27 AM CDT	River Flood Warning	SHV	Nacogdoches, Panola, Rusk, San Augustine, Shelby	23 hr
Mar 26, 3:47 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	58 min
Mar 26, 4:48 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	42 min
Mar 25, 7:19 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Claiborne, De Soto, Red River, Webster	56 min
Mar 25, 7:31 PM CDT	Tornado Warning	SHV	De Soto, Natchitoches, Red River, Sabine	59 min
Mar 25, 7:56 PM CDT	Tornado Warning	SHV	De Soto, Natchitoches, Red River, Winn	34 min
Mar 25, 8:06 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Jackson, Lincoln, Natchitoches, Ouachita and 3 more	54 min
Mar 25, 8:16 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Red River, Sabine, Winn	59 min
Mar 25, 8:44 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, Jackson, LaSalle, Natchitoches, Winn	61 min
Mar 25, 9:08 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Lincoln, Ouachita, Union, Winn	67 min
Mar 25, 9:22 PM CDT	Tornado Warning	SHV	Caldwell	38 min
Mar 25, 9:29 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Winn	61 min
Mar 26, 7:56 AM CDT	River Flood Warning	SHV	Webster	12 days
Mar 26, 4:38 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Sabine	37 min
Mar 26, 5:16 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Sabine	44 min
Mar 26, 6:01 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Winn	44 min
Mar 26, 6:38 PM CDT	Tornado Warning	SHV	Natchitoches, Red River, Winn	37 min
Mar 26, 6:40 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009 Severe Thunderstorm Warnings in Louisiana, 2009 Every 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.