Alert archive / Louisiana / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 16, NWS Shreveport, LA

March 13, 2005Natchitoches Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 13, 2005, 7:00 PM CST for Natchitoches Parish, Louisiana. It was in force for 75 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 13, 2005, 7:00 PM CST (01:00 UTC)
Expired: Mar 13, 2005, 8:15 PM CST
In force: 75 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Natchitoches Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.0 hours before the alert went out and 292 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: 544 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1790 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

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 13, 3:20 PM CST, 3 hours 40 minutes earlier.

Area forecast discussion, Mar 13, 3:20 PM CST, 3 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
320 PM CST SUN MAR 13 2005

.DISCUSSION...
FRONT NEAR A ELD-SHV-LFK LINE AT MID AFTERNOON...SLIGHTLY BEHIND SCHEDULE.
SOME CONVECTION TRYING TO GET GOING ALONG FRONT...BUT CAP SEEMS TO
BE HOLDING. WILL CARRY A CHANCE OF SHOWERS AND TSTMS LA PORTION EARLY
TONIGHT...BUT KEEPING POPS LOW...EVEN WITH SEVERE TSTM WATCH IN PLACE.
FAIR WEATHER EXPECTED MONDAY AND MONDAY NIGHT. LATEST GFS RUN INDICATES
A BETTER CHANCE OF RAIN BEGINNING TUESDAY AND CONTINUING THROUGH
TUESDAY NIGHT AS INVERTED TROF DEVELOPS ALONG GULF COAST COMBINED
WITH DECENT SHORT WAVE WHICH SHOULD PICK UP THE MOISTURE AND CARRY SYSTEM
RAPIDLY EAST WEDNESDAY. THEREAFTER...A DRY PERIOD...WITH MOSTLY NORTHERLY
SURFACE WINDS AND ZONAL FLOW ALOFT. ANOTHER DECENT SHORT WAVE KICKS
OUT OF ROCKIES ON SUNDAY...THUS WILL BRING IN SLIGHT CHANCE POPS
FOR END OF FORECAST PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  40  60  43  52 /  30  10  10  50
MLU  39  58  43  54 /  40  10  10  50
DEQ  30  60  37  49 /  10  10  10  50
TXK  37  59  41  51 /  10  10  10  50
ELD  36  60  38  54 /  30  10  10  50
TYR  41  61  43  55 /  10  10  10  50
GGG  40  61  43  54 /  10  10  10  50
LFK  43  63  45  61 /  10  10  10  60

&&

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

&&

14/14

Hazardous weather outlook, Mar 13, 3:30 PM CST, 3 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SHREVEPORT LA
330 PM CST SUN MAR 13 2005

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-141205-
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-
330 PM CST SUN MAR 13 2005

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...
A STRONG COLD FRONT WILL MOVE ACROSS NORTHWEST AND NORTHCENTRAL
LOUISIANA THIS EVENING. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG
AND AHEAD OF THE FRONT. A FEW OF THESE STORMS MAY BECOME SEVERE.
THE MAIN WEATHER HAZARDS ARE STRONG DAMAGING WINDS AND LARGE
HAIL. NO HAZARDOUS WEATHER IS EXPECTED OVER THE REMAINDER OF THE
FORECAST AREA.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND STORM
SPOTTERS...MAY BE NECESSARY ACROSS NORTHWEST AND NORTHCENTRAL
LOUISIANA THIS EVENING.

14

In the hours before

Special weather statement, Mar 13, 6:30 PM CST, 30 minutes before

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Special weather statement, Mar 13, 6:56 PM CST, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 6:17 PM CST	Severe Thunderstorm Warning	SHV	Winn	73 min
Mar 13, 7:08 PM CST	Severe Thunderstorm Warning	SHV	Grant, LaSalle	82 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2005 Every severe thunderstorm warning in 2005

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.