Alert archive / Louisiana / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 265, NWS Shreveport, LA

September 23, 20064 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Sep 23, 2006, 4:58 PM CDT for 4 parishes in Louisiana. It was in force for 47 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: Sep 23, 2006, 4:58 PM CDT (21:58 UTC)
Expired: Sep 23, 2006, 5:45 PM CDT
In force: 47 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

Counties Grant Parish, LA, Natchitoches Parish, LA, Sabine Parish, LA, Winn Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.0 hours before the alert went out and 280 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: 1821 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 658 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 148 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 Sep 23, 3:50 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Sep 23, 3:50 PM CDT, 1 hour 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
350 PM CDT SAT SEP 23 2006

.DISCUSSION...
FRONT CURRENTLY ACROSS CWA...NEAR A TXK-TYR LINE. BROKEN LINE OF
STORMS ALONG FRONT AT THIS TIME MOVING EAST WITH ANOTHER LINE OF
TSTMS DEVELOPING AHEAD OF THIS LINE IN DEEP EAST TEXAS. SEVERE TSTM
WATCH CURRENTLY IN EFFECT ALONG AND AHEAD OF FRONT UNTIL 8 PM THIS
EVENING. THE WATCH DOES NOT INCLUDE SOUTHEAST COUNTIES BUT EXPECT
ONE WILL BE ISSUED LATER THIS EVENING AS STORMS MOVE EAST. WENT
WITH LIKELY OR HIGHER POPS AHEAD OF FRONT...BUT WITH BROKEN
LINE... PARTS OF EAST TEXAS MAY GET MISSED IF STORMS DO NOT FILL
IN SOON. WILL KEEP SOME POPS INTO SUNDAY...GENERALLY EAST OF A
LFK-SHV-ELD LINE. BY SUNDAY EVENING DRY AND COOLER AIR SHOULD WORK
INTO ALL OF CWA.

MODELS SEEM TO BE IN FAIRLY GOOD AGREEMENT WITH TIMING OF FRONT.
HOWEVER NAM GENERATES SIGNIFICANTLY MORE LIFT OVER CWA...THUS
MORE QPF AND IT CONTINUES IT THROUGH MOST OF THE NIGHT. GFS LOOK MORE
REASONABLE...AT LEAST OVER CWA WITH LOWER QPF AND LESS LIFT...
ENDING PCPN SOONER.

DRY AND COOL WEATHER EXPECTED BEHIND FRONT. SOUTHERLY WINDS
RETURN TUESDAY...WITH ANOTHER QUICK WARM UP WEDNESDAY. ANOTHER
FRONT WILL CROSS AREA THURSDAY...BRINGING NEXT CHANCE OF PCPN.

&&

.AVIATION...
INTENSE TSTM ACTIVITY JUST AHEAD OF COLD FRONT...ALONG AND JUST
SOUTH OF INTERSTATE 30. STRONGEST STORM OVER SW AR DROPPING AN
OUTFLOW BOUNDARY ALONG THE LA BORDER AND INTO EXTREME NE TX.
THIS MAY BE A REGION FOR SUDDEN REDEVELOPMENT. ISOLATED THUNDERSTORMS
IN WARM SECTOR GRADUALLY INTENSIFYING...ESPECIALLY JUST WEST OF
TOLEDO BEND. CLOUDS APPEAR TO SCATTER OUT BEHIND FRONT QUICKER THAN
ORIGINALLY THOUGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  66  81  57  82 /  70  20  10   0
MLU  67  79  55  81 /  80  40  10   0
DEQ  58  77  50  79 /  40  10  10   0
TXK  61  79  54  81 /  60  10  10   0
ELD  62  80  54  80 /  70  20  10   0
TYR  62  80  57  81 /  60  10  10   0
GGG  64  81  56  81 /  60  20  10   0
LFK  68  83  58  83 /  80  20  10   0

&&

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

14/07

Hazardous weather outlook, Sep 23, 12:04 PM CDT, 4 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1204 PM CDT SAT SEP 23 2006

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-241100-
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-
1204 PM CDT SAT SEP 23 2006

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

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

STRONG TO SEVERE THUNDERSTORMS...MAINLY OVER NORTHEAST TEXAS INTO
SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS WILL BE SPREADING
EASTWARD INTO DEEP EAST TEXAS...NORTHWEST LOUISIANA...AND SOUTH
CENTRAL ARKANSAS THIS AFTERNOON AND OVERNIGHT. AN UPPER LEVEL
STORM SYSTEM ROTATING EAST ACROSS THE SOUTHERN AND CENTRAL PLAINS
INTO THE UPPER MID WEST WILL SEND A SURFACE COLD FRONT ACROSS THE
REGION. THE COMBINATION OF RICH LOW LEVEL MOISTURE FEEDING INTO THE
AREA...DAYTIME HEATING...AND FAVORABLE JET DYNAMICS...RESULTING IN
TURNING WINDS WITH HEIGHT...SHOULD ALLOW BOW ECHOES AND SUPERCELLS TO
PRODUCE STRONG AND GUSTY WINDS...LARGE HAIL...LOCALLY HEAVY
RAINFALL...WITH AN ISOLATED TORNADO POSSIBLE.

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

SEVERE THUNDERSTORMS WILL BE POSSIBLE OVER THE SOUTHERN SECTIONS OF
EAST TEXAS AND ACROSS NORTH LOUISIANA EARLY SUNDAY. THE STORMS WILL
BE ALONG AND NEAR A COLD FRONT THAT WILL BE EXTENDING FROM A
MONROE TO NATCHITOCHES...AND LUFKIN TEXAS LINE EARLY IN THE DAY.
SUNDAYS THUNDERSTORMS ARE EXPECTED TO CONTAIN LOCALLY HEAVY
RAINFALL...DANGEROUS LIGHTNING...GUSTY AND POSSIBLY HIGH AND DAMAGING
WINDS...AND LARGE HAIL.

.SPOTTER INFORMATION STATEMENT...
THE ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND STORM
SPOTTERS MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

14

In the hours before

Local storm report, Sep 23, 3:53 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
353 PM CDT SAT SEP 23 2006

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

0318 PM     HAIL             6 S HOPE                33.58N 93.59W
09/23/2006  M0.88 INCH       HEMPSTEAD          AR   LAW ENFORCEMENT

            OCCURED AT INTERSECTION OF CO RD 8 AND HWY 29

&&

PO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 23, 12:06 PM CDT	Severe Thunderstorm Warning	SHV	Red River	24 min
Sep 23, 2:24 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	51 min
Sep 23, 6:19 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	26 min
Sep 23, 5:43 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	47 min
Sep 23, 1:30 PM CDT	Severe Thunderstorm Warning	SHV	Little River, Sevier	45 min
Sep 23, 2:54 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Little River, Nevada	51 min
Sep 23, 3:07 PM CDT	Severe Thunderstorm Warning	SHV	Lafayette	23 min
Sep 23, 3:26 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Nevada	49 min
Sep 23, 3:33 PM CDT	Severe Thunderstorm Warning	SHV	Lafayette	27 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2006 Every severe thunderstorm warning in 2006

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.