Alert archive / Mississippi / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 12, NWS Mobile, AL

March 5, 2011George County, Perry County, Stone County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Mar 5, 2011, 9:15 AM CST for George County, Perry County, Stone County, Mississippi. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 5, 2011, 9:15 AM CST (15:15 UTC)
Expired
Mar 5, 2011, 9:41 AM CST
In force
26 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties George County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 73 km from the middle of the area, began a volume at 15:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 5, 8:54 AM CSTTornado WatchSPC7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.3 hours before the alert went out and 106 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, Slidell Radar S, LA at 12:00Z on 2011-03-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 960 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, Slidell Radar S, LA at 12:00Z on 2011-03-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 194 square meters per square second.193958Sfc1 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
960 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
451 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
194 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.8

Open this sounding in Storm Lab

The text

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

600 
WUUS54 KMOB 051515
SVRMOB
MSC039-111-131-051600-
/O.NEW.KMOB.SV.W.0012.110305T1515Z-110305T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
915 AM CST SAT MAR 5 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHEASTERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHEASTERN STONE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 1000 AM CST

* AT 910 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES EAST OF WIGGINS...OR 15
  MILES NORTH OF SAUCIER...AND MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DEEP CREEK AND BARBARA AROUND 945 AM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST SATURDAY AFTERNOON
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3106 8890 3091 8876 3078 8905 3089 8909
TIME...MOT...LOC 1515Z 227DEG 15KT 3085 8903

$$
1 follow-up statement
537 
WWUS54 KMOB 051541
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
941 AM CST SAT MAR 5 2011

MSC039-111-131-051550-
/O.CAN.KMOB.SV.W.0012.000000T0000Z-110305T1600Z/
GEORGE MS-STONE MS-PERRY MS-
941 AM CST SAT MAR 5 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PERRY...
NORTHEASTERN STONE AND WEST CENTRAL GEORGE COUNTIES IS CANCELLED...

AT 940 AM CST...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE 
STORM THAT PROMPTED THE WARNING HAS WEAKENED TO BELOW SEVERE 
LIMITS...THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST SATURDAY AFTERNOON
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3106 8890 3091 8876 3078 8905 3089 8909
TIME...MOT...LOC 1540Z 227DEG 15KT 3092 8894

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 5, 9:26 AM CSTAreal Flood AdvisoryMOBStone2 hr
Mar 5, 10:04 AM CSTTornado WarningMOBGreene, Perry41 min
Mar 5, 10:42 AM CSTFlash Flood WarningMOBPerry2 hr
Mar 5, 10:46 AM CSTTornado WarningMOBGreene44 min
Mar 5, 11:26 AM CSTAreal Flood AdvisoryMOBGreene2 hr
Mar 5, 11:54 AM CSTSevere Thunderstorm WarningMOBGreene50 min
Mar 5, 11:58 AM CSTAreal Flood AdvisoryMOBGreene2 hr
Mar 5, 12:50 PM CSTFlash Flood WarningMOBGreene, Perry3 hr
Mar 5, 1:16 PM CSTFlash Flood WatchMOBGeorge, Greene, Perry, Stone, Wayne6 hr
Mar 5, 1:39 PM CSTAreal Flood AdvisoryMOBGreene, Perry, Wayne2 hr
Mar 5, 2:50 PM CSTFlash Flood WarningMOBStone4 hr
Mar 5, 3:23 PM CSTFlash Flood WarningMOBGreene, Perry, Wayne3 hr
Mar 5, 3:48 PM CSTFlash Flood WarningMOBGreene, Perry3 hr
Mar 5, 4:17 PM CSTAreal Flood AdvisoryMOBGeorge118 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2011Every severe thunderstorm warning in 2011

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.