Alert archive / Louisiana / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 114, NWS Jackson, MS

March 31, 2009Catahoula Parish, Concordia Parish, Tensas Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Mar 31, 2009, 9:56 AM CDT for Catahoula Parish, Concordia Parish, Tensas Parish, Louisiana. It was in force for 49 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, 2009, 9:56 AM CDT (14:56 UTC)
Expired: Mar 31, 2009, 10:45 AM CDT
In force: 49 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Catahoula Parish, LA, Concordia Parish, LA, Tensas 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
Mar 31, 9:37 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 2.9 hours before the alert went out and 160 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: 34 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 294 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 31, 4:36 AM CDT, 5 hours 20 minutes earlier.

Area forecast discussion, Mar 31, 4:36 AM CDT, 5 hours 20 minutes before

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Hazardous weather outlook, Mar 31, 5:54 AM CDT, 4 hours 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
554 AM CDT TUE MAR 31 2009

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
011100-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-
SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES-
CHOCTAW-OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON-
NOXUBEE-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER-
WARREN-HINDS-RANKIN-SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH-
SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-
LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST-
554 AM CDT TUE MAR 31 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI...
NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED SEVERE THUNDERSTORMS WILL BE POSSIBLE TODAY AS
A STRONG UPPER LEVEL SYSTEM DEVELOPS TO OUR NORTH AND A COLD FRONT
MOVES THROUGH THE REGION. INCREASING MOISTURE AND INSTABILITY WILL
COMBINE WITH COLD TEMPERATURES ALOFT AND STRONG WINDS TO SUPPORT THE
SEVERE WEATHER RISK FOR AREAS ALONG AND SOUTH OF A LINE FROM NATCHEZ
TO GREENWOOD TO MERIDIAN TO HATTIESBURG. QUARTER TO GOLF BALL SIZED
HAIL AND DAMAGING WINDS ARE THE PRIMARY RISK WITH THE STRONGER STORMS
TODAY. THE MAIN TIME FOR THIS ACTIVITY WILL FROM 11 AM TILL 7 PM.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A POWERFUL SPRING STORM SYSTEM WILL EVOLVE OVER THE REGION THURSDAY
AND BRING THE POTENTIAL FOR A SEVERE WEATHER OUTBREAK. VERY STRONG
WINDS AND LIFT WILL COMBINE WITH HIGH LEVELS OF INSTABILITY TO
DEVELOP INTENSE THUNDERSTORMS. VERY LARGE HAIL...DESTRUCTIVE WINDS
AND TORNADOES WILL ALL BE POSSIBLE THURSDAY. WHILE DETAILS ARE NOT
KNOWN ON THE EXACT EVOLUTION OF THIS EVENT...MANY ELEMENTS LOOK TO BE
PRESENT TO PRODUCE SIGNIFICANT SEVERE WEATHER. EVERYONE SHOULD
MONITOR THE LATEST FORECASTS AND OUTLOOKS CONCERNING THIS POTENTIAL
SEVERE WEATHER OUTBREAK.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS WILL LIKELY BE NEEDED TODAY AND THEN AGAIN THURSDAY.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

CME

In the hours before

Local storm report, Mar 31, 8:15 AM CDT, 1 hour 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
815 AM CDT TUE MAR 31 2009

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

0750 PM     HAIL             6 W MORGANTOWN          31.31N 90.02W
03/27/2009  E0.75 INCH       MARION             MS   PUBLIC

0800 AM     TSTM WND DMG     MOSS                    31.82N 89.18W
03/26/2009                   JONES              MS   EMERGENCY MNGR

            A COUPLE TREES WERE BLOWN DOWN...ONE WAS ON A CAR.

&&

CME

Special weather statement, Mar 31, 9:45 AM CDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
945 AM CDT TUE MAR 31 2009

LAZ023>026-MSZ060-311530-
TENSAS LA-CATAHOULA LA-CONCORDIA LA-FRANKLIN LA-ADAMS MS-
945 AM CDT TUE MAR 31 2009

...SEVERE THUNDERSTORM MOVING TOWARD EAST CENTRAL LOUISIANA AND
SOUTHWEST MISSISSIPPI...

A SEVERE THUNDERSTORM CAPABLE WAS LOCATED 25 MILES WEST OF JONESVILLE
AT 943 AM CDT...MOVING EAST AT 55 MPH.

SHOULD THIS STORM MAINTAIN INTENSITY...IT WILL BE AFFECTING CATAHOULA
AND CONCORDIA PARISHES BETWEEN 10 AM AND 11 AM. HAIL AND DAMAGING
WINDS WILL BE POSSIBLE WITH THIS STORM.

PEOPLE IN WEST CENTRAL ADAMS COUNTY...NORTHERN CONCORDIA...CATAHOULA
AND SOUTHWESTERN TENSAS PARISHES SHOULD MONITOR THIS STORM CLOSELY.

AEG

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 31, 11:32 AM CDT	Severe Thunderstorm Warning	JAN	Adams, Franklin, Jefferson	43 min
Mar 31, 12:12 PM CDT	Severe Thunderstorm Warning	JAN	Copiah, Franklin, Jefferson, Lincoln	41 min
Mar 31, 4:24 PM CDT	Severe Thunderstorm Warning	JAN	Lamar, Marion	51 min
Mar 31, 4:50 PM CDT	Severe Thunderstorm Warning	JAN	Forrest	40 min
Mar 31, 9:17 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Richland	43 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2009 Every severe thunderstorm warning in 2009

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.