Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 199, NWS Shreveport, LA

April 4, 2008Caldwell Parish, Jackson Parish, Ouachita Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 4, 2008, 10:29 AM CDT for Caldwell Parish, Jackson Parish, Ouachita Parish, Louisiana. It was in force for 46 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 4, 2008, 10:29 AM CDT (15:29 UTC)
Expired: Apr 4, 2008, 11:15 AM CDT
In force: 46 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Caldwell Parish, LA, Jackson Parish, LA, Ouachita Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 4, 3:55 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 4, 9:48 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 3.5 hours before the alert went out and 140 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: 1562 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 544 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 6.2

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 Apr 4, 10:09 AM CDT, 20 minutes earlier.

Area forecast discussion, Apr 4, 10:09 AM CDT, 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
1009 AM CDT FRI APR 4 2008

.DISCUSSION...

UPDATING TO CANCEL SEVERE WATCHES OVER THE NW PORTION OF AREA...
AND TO ADD NEW TORNADO WATCH 164 TO THE SE PORTION OF AREA.
INTENSE LINE OF TSTMS LIKELY PRODUCING HIGH WINDS MOVING INTO TOR
WATCH AREA...WHILE STRONG HAIL PRODUCING CONVECTION IS THREATENING
TO IMPACT AREAS NEAR LFK SOON. AS BOUNDARY PUSHES SOUTH THERE IS
HOPE THESE HAILERS WILL WEAKEN...OR THEY MAY TRACK ALONG THE
EXTREME SOUTHERN CWA BORDER NEAR ZAVALLA EASTWARD. EVENT WILL BE
GRADUALLY ENDING FROM NW TO SE AS H5 SHORTWAVE MOVES SE FROM OK TO
NEAR I 30 TONIGHT. FAIR WEATHER FOR THE WEEKEND. /17/

&&

.AVIATION...

LINE OF INTENSIFYING STORMS...CREEPING EAST THRU NORTH LA. WILL MOVE
INTO MLU SITE...WITHIN ONE HALF HOUR. LOOK FOR GUSTY WINDS ALONG
LEADING EDGE. RW COVERING LFK...HEFTY STORMS SNEAKING FROM SW BACK
TOWARDS LFK...OTHER RW/ISLTD TSTMS APPEAR TO HEAD BACK INTO
REMAINING 5 SITES. KEEP IN PCPN THRU MID AFTN. MVFR CIGS WILL
CONTINUE INTO EVE. ALTHOUGH CONVECTIVE GUST FRONTS BRINGING SOME
N-NE WINDS TO AREA..COLD FRONT STILL NW OF A TYR-TXK LINE.
N-NW WIND AFTER FROPA...GUSTING 20-25 MPH. /VII/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  71  48  73  49 /  70  30   0   0
MLU  72  49  69  47 / 100  60   0   0
DEQ  63  42  72  43 /  50  10   0   0
TXK  69  45  71  48 /  90  20   0   0
ELD  71  45  70  47 / 100  40   0   0
TYR  71  46  72  50 /  70  20   0   0
GGG  71  46  72  49 /  70  20   0   0
LFK  72  49  75  50 / 100  40   0   0

&&

.SHV WATCHES/WARNINGS/ADVISORIES...

AR...FLASH FLOOD WATCH UNTIL 4 PM FRIDAY FOR THE FOLLOWING ZONES:
     COLUMBIA...HEMPSTEAD...HOWARD...LAFAYETTE...LITTLE
     RIVER...MILLER...NEVADA...SEVIER...AND UNION AR.

LA...FLASH FLOOD WATCH UNTIL 4 PM FRIDAY FOR THE FOLLOWING ZONES:
     BIENVILLE...BOSSIER...CADDO...CALDWELL...CLAIBORNE...DE
     SOTO...GRANT...JACKSON...LA SALLE...LINCOLN...NATCHITOCHES...
     OUACHITA...RED RIVER...SABINE LA...UNION LA...WEBSTER...
     AND WINN.

OK...FLASH FLOOD WATCH UNTIL 4 PM FRIDAY FOR THE FOLLOWING ZONES:
     MCCURTAIN.

TX...FLASH FLOOD WATCH UNTIL 4 PM FRIDAY FOR THE FOLLOWING ZONES:
     ANGELINA...BOWIE...CAMP...CASS...CHEROKEE...FRANKLIN...GREGG...
     HARRISON...MARION...MORRIS...NACOGDOCHES...PANOLA...RED RIVER...
     RUSK...SABINE TX...SAN AUGUSTINE...SHELBY...SMITH...TITUS...
     UPSHUR...AND WOOD.

&&

17/07

Hazardous weather outlook, Apr 4, 6:00 AM CDT, 4 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
600 AM CDT FRI APR 4 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>167-041700-
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-
600 AM CDT FRI APR 4 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...TODAY AND TONIGHT...

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND TRAIN
ALONG AND NEAR A COLD FRONT THAT WILL BE MOVING SOUTHEAST
ACROSS THE AREA TODAY AND OUT OF THE AREA TONIGHT. STRONG TO
SEVERE THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAINFALL...IN
ADDITION TO LARGE HAIL AND HIGH AND DAMAGING WINDS. THE HEAVY
RAINFALL WILL PRODUCE AMOUNTS OF NEAR ONE UP TO TWO INCHES
WITH TOTALS APPROACHING THREE TO FOUR INCHES BEFORE
ENDING TONIGHT. FLASH FLOODING WILL BE POSSIBLE ESPECIALLY WHERE
PREVIOUS RAINS OVER THE PAST FEW DAYS HAS OCCURRED.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

SHOWERS AND THUNDERSTORMS WILL RETURN NEAR MID WEEK WITH
THE LATE HALF OF THE WEEK LOOKING WET. NO HAZARDOUS WEATHER
IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

THE ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER
OPERATIONS...WILL BE NEEDED TODAY AND TONIGHT.

06

In the hours before

Local storm report, Apr 4, 4:30 AM CDT, 5 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
430 AM CDT FRI APR 04 2008

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

0410 AM     HAIL             5 SW HORATIO            33.89N 94.42W
04/04/2008  M0.75 INCH       LITTLE RIVER       AR   TRAINED SPOTTER

&&

STEVENS

Local storm report, Apr 4, 9:19 AM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
919 AM CDT FRI APR 04 2008

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

0803 AM     FLASH FLOOD      EL DORADO               33.22N 92.66W
04/04/2008                   UNION              AR   PUBLIC

            STREET FLOODING REPORTED IN THE CITY OF EL DORADO

&&

04

Local storm report, Apr 4, 10:24 AM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1024 AM CDT FRI APR 04 2008

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

0736 AM     TSTM WND DMG     MOUNT ENTERPRISE        31.91N 94.68W
04/04/2008                   RUSK               TX   LAW ENFORCEMENT

            TREES DOWN ACOSS SOUTHEASTERN PART OF COUNTY

0854 AM     TSTM WND DMG     8 SW MANSFIELD          31.95N 93.80W
04/04/2008                   DE SOTO            LA   LAW ENFORCEMENT

            TREES DOWN ACROSS HARTS BLUFF RD

0905 AM     FLASH FLOOD      4 NE MOUNT ENTERPRISE   31.95N 94.63W
04/04/2008                   RUSK               TX   LAW ENFORCEMENT

            WATER ACROSS RD AT SH 315 AND FM 95

0910 AM     TSTM WND DMG     5 NNW COUSHATTA         32.09N 93.37W
04/04/2008                   RED RIVER          LA   LAW ENFORCEMENT

            TREE DOWN AT SH 515 AND US HWY 71

0918 AM     TSTM WND DMG     COUSHATTA               32.02N 93.34W
04/04/2008                   RED RIVER          LA   LAW ENFORCEMENT

            TREES DOWN AT SH 480 AND US 71...AND ALL ALONG US 71
            SOUTH OF COUSHATTA

&&

12

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 7:26 PM CDT	Severe Thunderstorm Warning	SHV	Red River	49 min
Apr 3, 7:59 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Red River	46 min
Apr 3, 8:41 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Red River	64 min
Apr 3, 8:53 PM CDT	Tornado Warning	SHV	Bowie, Red River	29 min
Apr 3, 9:42 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Red River	63 min
Apr 3, 9:55 PM CDT	Tornado Warning	SHV	Bowie, Red River	35 min
Apr 4, 1:24 AM CDT	Severe Thunderstorm Warning	SHV	Red River	66 min
Apr 4, 4:16 AM CDT	Severe Thunderstorm Warning	SHV	Bowie	44 min
Apr 4, 4:44 AM CDT	Flash Flood Watch	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	16 hr
Apr 4, 5:35 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass, Morris	40 min
Apr 4, 5:53 AM CDT	Flash Flood Warning	SHV	Red River	6 hr
Apr 4, 7:24 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	51 min
Apr 4, 8:07 AM CDT	Flash Flood Warning	SHV	Nacogdoches, Panola, Rusk, Shelby	3 hr
Apr 4, 10:17 AM CDT	River Flood Warning	SHV	Bowie, Red River	22 hr
Apr 4, 11:10 AM CDT	Flash Flood Warning	SHV	Angelina, Cherokee, Nacogdoches, Sabine, San Augustine, Shelby	6 hr
Apr 4, 6:17 PM CDT	River Flood Warning	SHV	Nacogdoches, Panola, Rusk, San Augustine, Shelby	5 days
Apr 4, 8:53 AM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	52 min
Apr 4, 9:16 AM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Sabine	44 min
Apr 4, 9:41 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Grant, Jackson, Natchitoches, Winn	49 min
Apr 4, 10:07 AM CDT	Tornado Warning	SHV	Grant, LaSalle, Winn	23 min
Apr 4, 10:17 AM CDT	River Flood Warning	SHV	Webster	16 days
Apr 4, 10:24 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Winn	51 min
Apr 3, 8:36 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	54 min
Apr 3, 9:33 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	57 min
Apr 3, 9:56 PM CDT	Tornado Warning	SHV	Howard, Little River, Sevier	34 min
Apr 3, 11:23 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Sevier	52 min
Apr 3, 11:51 PM CDT	Flash Flood Warning	SHV	Howard, Sevier	24 min
Apr 3, 11:53 PM CDT	Flash Flood Warning	SHV	Howard, Sevier	4 hr
Apr 4, 2:16 AM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	59 min
Apr 4, 5:00 AM CDT	Severe Thunderstorm Warning	SHV	Columbia, Hempstead, Lafayette, Miller, Nevada	60 min
Apr 4, 10:17 AM CDT	River Flood Warning	SHV	Little River, Sevier	47 hr
Apr 4, 10:17 AM CDT	River Flood Warning	SHV	Howard, Little River, Sevier	62 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 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.