Alert archive / Louisiana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 19, NWS Shreveport, LA

March 27, 20144 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 27, 2014, 4:46 PM CDT for 4 parishes in Louisiana. It was in force for 29 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 27, 2014, 4:46 PM CDT (21:46 UTC)
Expired: Mar 27, 2014, 5:15 PM CDT
In force: 29 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties De Soto Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA

The radar

The Shreveport radar (KSHV), 76 km from the middle of the area, began a volume at 21:50 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 (KBAD), launched 12:00Z, 9.8 hours before the alert went out and 75 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 561 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 567 m²/s²
0-3 km storm-relative helicity: 556 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 Mar 27, 4:36 PM CDT, 10 minutes earlier.

Area forecast discussion, Mar 27, 4:36 PM CDT, 10 minutes before

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Hazardous weather outlook, Mar 27, 12:40 PM CDT, 4 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1240 PM CDT THU MAR 27 2014

ARZ072-073-LAZ001>006-010>014-017>022-TXZ126-136>138-149>153-165>167-
281100-
ANGELINA-BIENVILLE-BOSSIER-CADDO-CALDWELL-CHEROKEE-CLAIBORNE-
COLUMBIA-DE SOTO-GRANT-GREGG-HARRISON-JACKSON-LA SALLE-LINCOLN-
MARION-NACOGDOCHES-NATCHITOCHES-OUACHITA-PANOLA-RED RIVER LA-RUSK-
SABINE LA-SABINE TX-SAN AUGUSTINE-SHELBY-SMITH-UNION AR-UNION LA-
WEBSTER-WINN-
1240 PM CDT THU MAR 27 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...FOR NORTHWEST AND NORTH CENTRAL LOUISIANA...AND EAST
AND NORTHEAST TEXAS GENERALLY SOUTH OF INTERSTATE 20.

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

WINDY CONDITIONS WILL CONTINUE UNTIL AROUND 7 PM CDT IN THE EVENING
DUE TO A TIGHT PRESSURE GRADIENT BETWEEN SURFACE HIGH PRESSURE OVER
THE SOUTHEAST STATES AND SURFACE LOW PRESSURE OVER THE PLAINS.
BOATERS SHOULD EXERCISE CAUTION ON AREA LAKES.

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND
SPREAD TO THE NORTHEAST ACROSS THE AREA. ISOLATED STRONG
THUNDERSTORMS WILL BE POSSIBLE...WITH SMALL HAIL...GUSTY WINDS...
AND DEADLY LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ON FRIDAY...
MAINLY IN THE AFTERNOON AND EVENING...ALONG AND AHEAD OF A
COLD FRONT THAT WILL SHIFT SOUTHEAST ACROSS THE AREA FRIDAY
EVENING. STRONG TO SEVERE THUNDERSTORMS WITH LARGE HAIL
AND DAMAGING WINDS THE PRIMARY THREATS FRIDAY AFTERNOON AND
EVENING. HIGH PRESSURE ON THE SURFACE AND ALOFT BUILD OVER THE
AREA FOR THE EARLY WEEKEND AND KEEPS DRY CONDITIONS INTO
NEAR THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS WILL NOT BE NEEDED BE NEEDED
THROUGH TONIGHT.

ARZ050-051-059>061-070-071-OKZ077-TXZ096-097-108>112-124-125-281100-
BOWIE-CAMP-CASS-FRANKLIN-HEMPSTEAD-HOWARD-LAFAYETTE-LITTLE RIVER-
MCCURTAIN-MILLER-MORRIS-NEVADA-RED RIVER TX-SEVIER-TITUS-UPSHUR-WOOD-
1240 PM CDT THU MAR 27 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST OKLAHOMA AND
PORTIONS OF SOUTHWEST ARKANSAS...AND EAST AND NORTHEAST TEXAS
GENERALLY NORTH OF INTERSTATE 20.

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

WINDY CONDITIONS WILL CONTINUE UNTIL AROUND 7 PM CDT IN THE EVENING
DUE TO A TIGHT PRESSURE GRADIENT BETWEEN SURFACE HIGH PRESSURE OVER
THE SOUTHEAST STATES AND SURFACE LOW PRESSURE OVER THE PLAINS.
BOATERS SHOULD EXERCISE CAUTION ON AREA LAKES.

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND
SPREAD TO THE NORTHEAST ACROSS THE AREA. ISOLATED STRONG
TO SEVERE THUNDERSTORMS WILL BE POSSIBLE...WITH MAINLY SMALL
HAIL IF IT OCCURS...GUSTY WINDS...AND DEADLY LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ON FRIDAY...
MAINLY IN THE AFTERNOON AND EVENING...ALONG AND AHEAD OF A
COLD FRONT THAT WILL SHIFT SOUTHEAST ACROSS THE AREA FRIDAY
EVENING. STRONG TO SEVERE THUNDERSTORMS WITH LARGE HAIL
AND DAMAGING WINDS THE PRIMARY THREATS FRIDAY AFTERNOON AND
EVENING. HIGH PRESSURE ON THE SURFACE AND ALOFT BUILD OVER THE
AREA FOR THE EARLY WEEKEND AND KEEPS DRY CONDITIONS INTO
NEAR THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS WILL NOT BE NEEDED BE NEEDED
THROUGH TONIGHT.

06

In the hours before

Special weather statement, Mar 27, 3:50 PM CDT, 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
350 PM CDT THU MAR 27 2014

LAZ010-017-018-TXZ153-166-272145-
DE SOTO-NATCHITOCHES-SABINE-SAN AUGUSTINE-SHELBY-
350 PM CDT THU MAR 27 2014

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 445 PM CDT...FOR THE FOLLOWING
PARISHES AND COUNTIES...

IN NORTHWEST LOUISIANA...
     SABINE...NATCHITOCHES AND DE SOTO...
IN EASTERN TEXAS...
     SAN AUGUSTINE AND SHELBY...

INCLUDING THE FOLLOWING LOCATIONS...
     CONVERSE...MANSFIELD...BLAND LAKE...NEUVILLE...PATROON...SAN
     AUGUSTINE AND SHELBYVILLE...

AT 349 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM NEAR BLAND LAKE...OR 12 MILES
SOUTHEAST OF CENTER...MOVING NORTHEAST AT 70 MPH.

NICKEL SIZE HAIL IS EXPECTED WITH THIS STORM.

24

Special weather statement, Mar 27, 3:53 PM CDT, 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
353 PM CDT THU MAR 27 2014

TXZ152-165>167-272200-
ANGELINA-NACOGDOCHES-SABINE-SAN AUGUSTINE-
353 PM CDT THU MAR 27 2014

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 500 PM CDT...FOR THE FOLLOWING
COUNTIES...

IN EASTERN TEXAS...
     NACOGDOCHES...SABINE...SAN AUGUSTINE AND ANGELINA...

INCLUDING THE FOLLOWING LOCATIONS...
     BLAND LAKE...ETOILE...GENEVA...HUNTINGTON...MACUNE...ROSEVINE
     AND SAN AUGUSTINE...

AT 349 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM 6 MILES SOUTHWEST OF HUNTINGTON...OR
10 MILES EAST OF DIBOLL...MOVING NORTHEAST AT 50 MPH.

NICKEL SIZE HAIL AND HEAVY RAINFALL ARE EXPECTED WITH THIS STORM.

24

Special weather statement, Mar 27, 3:58 PM CDT, 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
358 PM CDT THU MAR 27 2014

ARZ072-073-272130-
COLUMBIA-UNION-
358 PM CDT THU MAR 27 2014

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 430 PM CDT...FOR THE FOLLOWING
COUNTIES...

IN SOUTHWEST ARKANSAS...
     COLUMBIA...
IN SOUTH CENTRAL ARKANSAS...
     UNION...

INCLUDING THE FOLLOWING LOCATIONS...
     MCNEIL...MOUNT HOLLY AND VILLAGE...

AT 353 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM NEAR MCNEIL...MOVING NORTHEAST AT 55
MPH.

NICKEL SIZE HAIL IS EXPECTED WITH THIS STORM.

24

Special weather statement, Mar 27, 4:23 PM CDT, 23 minutes before

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Special weather statement, Mar 27, 4:25 PM CDT, 21 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 27, 3:10 AM CDT	Lake Wind Advisory	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	16 hr
Mar 27, 4:00 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, San Augustine, Shelby	30 min
Mar 27, 3:47 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	43 min
Mar 27, 4:21 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Claiborne, Webster	24 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2014 Every severe thunderstorm warning in 2014

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.