Alert archive / Arkansas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 86, NWS Shreveport, LA

March 31, 20135 counties in Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 31, 2013, 3:45 AM CDT for 5 counties in Arkansas. It was in force for 45 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 31, 2013, 3:45 AM CDT (08:45 UTC)
Expired: Mar 31, 2013, 4:30 AM CDT
In force: 45 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Miller County, AR, Nevada County, AR

The radar

The Shreveport radar (KSHV), 113 km from the middle of the area, began a volume at 08:47 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

Fort Worth, TX (KFWD), launched 00:00Z, 8.8 hours before the alert went out and 356 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: 986 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1273 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.4

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 30, 10:05 PM CDT, 5 hours 40 minutes earlier.

Area forecast discussion, Mar 30, 10:05 PM CDT, 5 hours 40 minutes before

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Hazardous weather outlook, Mar 30, 11:45 AM CDT, 16 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1145 AM CDT SAT MAR 30 2013

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-311645-
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-
1145 AM CDT SAT MAR 30 2013

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...

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND
MOVE SOUTHEAST ACROSS PORTIONS OF THE FOUR STATE REGION THIS
AFTERNOON. SMALL HAIL...GUSTY WIND AND BRIEF HEAVY RAINFALL WILL
BE POSSIBLE IN THE STRONGER STORMS.

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

SCATTERED THUNDERSTORMS WILL BE POSSIBLE SUNDAY AND MONDAY AS
ADDITIONAL DISTURBANCES ALOFT AND A COLD FRONT MOVE INTO THE
REGION. NO ORGANIZED HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

05

In the hours before

Local storm report, Mar 30, 10:15 PM CDT, 5 hours 30 minutes before

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Special weather statement, Mar 31, 2:30 AM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
230 AM CDT SUN MAR 31 2013

ARZ050-051-059-060-OKZ077-TXZ097-310815-
BOWIE-HEMPSTEAD-HOWARD-LITTLE RIVER-MCCURTAIN-SEVIER-
230 AM CDT SUN MAR 31 2013

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 315 AM CDT...FOR THE FOLLOWING
COUNTIES...

IN SOUTHWEST ARKANSAS...
     HEMPSTEAD...HOWARD...LITTLE RIVER AND SEVIER...
IN SOUTHEAST OKLAHOMA...
     MCCURTAIN...
IN NORTHEAST TEXAS...
     BOWIE...

INCLUDING THE FOLLOWING LOCATIONS...
     ALLEENE...ARKINDA...ASHDOWN...BEN LOMOND...FOREMAN...HORATIO...
     RICHMOND...SARATOGA...TOLLETTE...WILTON AND WINTHROP...

AT 226 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM 12 MILES SOUTHEAST OF BROKEN BOW...OR
12 MILES WEST OF HORATIO...MOVING SOUTHEAST AT 35 MPH.

PEA SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.

09

Special weather statement, Mar 31, 3:27 AM CDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
327 AM CDT SUN MAR 31 2013

ARZ059>061-070-071-TXZ097-310915-
BOWIE-HEMPSTEAD-LAFAYETTE-LITTLE RIVER-MILLER-NEVADA-
327 AM CDT SUN MAR 31 2013

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 415 AM CDT...FOR THE FOLLOWING
COUNTIES...

IN SOUTHWEST ARKANSAS...
     HEMPSTEAD...LAFAYETTE...LITTLE RIVER...MILLER AND NEVADA...
IN NORTHEAST TEXAS...
     BOWIE...

INCLUDING THE FOLLOWING LOCATIONS...
     ASHDOWN...FULTON...GARLAND...GENOA...MANDEVILLE...OGDEN...
     RICHMOND...TEXARKANA...NASH AND WAKE VILLAGE...

AT 326 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM NEAR OGDEN...OR NEAR ASHDOWN...MOVING
SOUTHEAST AT 45 MPH.

PENNY SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.

09

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 7:32 AM CDT	Severe Thunderstorm Warning	SHV	Red River	43 min
Mar 31, 8:19 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Franklin, Morris, Red River, Titus	41 min
Mar 31, 8:49 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Franklin, Morris, Red River and 1 more	41 min
Mar 31, 9:13 AM CDT	Severe Thunderstorm Warning	SHV	Camp, Cass, Harrison, Marion, Morris, Upshur	47 min
Mar 31, 9:15 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	60 min
Mar 31, 9:44 AM CDT	Tornado Warning	SHV	Harrison, Marion	31 min
Mar 31, 10:03 AM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion, Panola	27 min
Mar 31, 10:06 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk, Smith	39 min
Mar 31, 10:31 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Harrison, Nacogdoches, Panola, Rusk, Shelby and 1 more	59 min
Mar 31, 11:29 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Cherokee, Nacogdoches, Sabine, San Augustine, Shelby	61 min
Mar 31, 10:00 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Claiborne, Union, Webster	60 min
Mar 31, 10:57 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, Claiborne, Jackson, Lincoln and 5 more	63 min
Mar 31, 11:58 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, Jackson, LaSalle, Natchitoches, Ouachita and 2 more	62 min
Mar 31, 12:58 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle	32 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2013 Every severe thunderstorm warning in 2013

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.