Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 101, NWS New Orleans, LA

May 21, 2012Wilkinson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at May 21, 2012, 5:11 PM CDT for Wilkinson County, Mississippi. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 21, 2012, 5:11 PM CDT (22:11 UTC)
Expired
May 21, 2012, 6:00 PM CDT
In force
49 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

County Wilkinson County, MS

What was reported inside it

TimeReportWhereRemark
May 21, 5:25 PM CDTHAIL 1.254 Nne Fort Adams, MSDIME TO HALF DOLLAR SIZE HAIL FELL ALONG HIGHWAY 24.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.2 hours before the alert went out and 187 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2012-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 518 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2012-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
518 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
1663 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

419 
WUUS54 KLIX 212211
SVRLIX
MSC157-212300-
/O.NEW.KLIX.SV.W.0101.120521T2211Z-120521T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
511 PM CDT MON MAY 21 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN WILKINSON COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 600 PM CDT

* AT 507 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  NORTH OF FORT ADAMS...OR 22 MILES NORTHEAST OF SIMMESPORT...AND
  MOVING SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WOODVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3101 9118 3101 9160 3103 9157 3106 9157
      3111 9163 3114 9163 3118 9159 3122 9159
      3124 9156 3122 9152 3123 9150 3126 9149
      3128 9150 3129 9148
TIME...MOT...LOC 2211Z 327DEG 13KT 3117 9153

$$
1 follow-up statement
204 
WWUS54 KLIX 212251
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
551 PM CDT MON MAY 21 2012

MSC157-212300-
/O.EXP.KLIX.SV.W.0101.000000T0000Z-120521T2300Z/
WILKINSON MS-
551 PM CDT MON MAY 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WILKINSON COUNTY WILL
EXPIRE AT 600 PM CDT...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED CONSIDERABLY OVER 
THE LAST 10 MINUTES...AND IS LOCATED ABOUT 5 MILES EAST OF FORT 
ADAMS.

LAT...LON 3101 9118 3101 9160 3103 9157 3106 9157
      3111 9163 3114 9163 3118 9159 3122 9159
      3124 9156 3122 9152 3123 9150 3126 9149
      3128 9150 3129 9148
TIME...MOT...LOC 2250Z 327DEG 13KT 3105 9144

$$

Nearby

Severe Thunderstorm Warnings in Mississippi, 2012Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.