Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 87, NWS Mobile, AL

May 31, 2012Washington County, Alabama; Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at May 31, 2012, 4:40 PM CDT for Washington County, Alabama; Wayne County, Mississippi. It was in force for 50 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 31, 2012, 4:40 PM CDT (21:40 UTC)
Expired
May 31, 2012, 5:30 PM CDT
In force
50 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Washington County, AL, Wayne County, MS

The radar

The Mobile radar (KMOB), 104 km from the middle of the area, began a volume at 21:42 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.

What was reported inside it

TimeReportWhereRemark
May 31, 4:50 PM CDTHAIL 1Buckatunna, MSBUCKATUNNA BUILDING SUPPLY STORE REPORTED QUARTER SIZE HAIL.

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

The watch it was issued in

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

IssuedProductOfficeLasted
May 31, 2:53 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.7 hours before the alert went out and 172 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 2012-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1744 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 2012-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
1744 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
674 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
65 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.

504 
WUUS54 KMOB 312140
SVRMOB
ALC129-MSC153-312230-
/O.NEW.KMOB.SV.W.0087.120531T2140Z-120531T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
440 PM CDT THU MAY 31 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 530 PM CDT

* AT 437 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 15 MILES
  SOUTHEAST OF WAYNESBORO...OR 4 MILES NORTHWEST OF STATE LINE...AND
  MOVING NORTH AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         STATE LINE...         BUCKATUNNA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DESTRUCTIVE HAIL AND DAMAGING
WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY
FROM WINDOWS.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3169 8836 3143 8833 3144 8856 3171 8876
TIME...MOT...LOC 2140Z 164DEG 17KT 3150 8851

$$
2 follow-up statements
513 
WWUS54 KMOB 312155
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
455 PM CDT THU MAY 31 2012

ALC129-MSC153-312230-
/O.CON.KMOB.SV.W.0087.000000T0000Z-120531T2230Z/
WASHINGTON AL-WAYNE MS-
455 PM CDT THU MAY 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHEASTERN WAYNE AND NORTHWESTERN WASHINGTON COUNTIES...

AT 450 PM CDT...THE PUBLIC REPORTED QUARTER SIZED HAIL IN BUCKATUNNA.

AT 455 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE 
CONTINUING TO MONITOR A SEVERE THUNDERSTORM CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DAMAGING WINDS OVER 60 MPH NEAR BUCKATUNNA... 
OR ABOUT 11 MILES SOUTHEAST OF WAYNESBORO...MOVING NORTH AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
 U.S. HIGHWAY 45 SOUTHEAST OF WAYNESBORO...STATE LINE...AND BUCKATUNNA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO 
GROUND LIGHTNING IS ALSO OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3169 8836 3143 8833 3144 8856 3171 8876
TIME...MOT...LOC 2152Z 164DEG 17KT 3155 8853

$$
722 
WWUS54 KMOB 312228
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
528 PM CDT THU MAY 31 2012

ALC129-MSC153-312238-
/O.EXP.KMOB.SV.W.0087.000000T0000Z-120531T2230Z/
WASHINGTON AL-WAYNE MS-
528 PM CDT THU MAY 31 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR
SOUTHEASTERN WAYNE AND NORTHWESTERN WASHINGTON COUNTIES...

AT 528 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTHEASTERN
WAYNE AND NORTHWESTERN WASHINGTON COUNTIES HAS WEAKENED TO BELOW
SEVERE LIMITS...THUS THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED
TO EXPIRE AT 530 PM CDT.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR SOUTHEAST MISSISSIPPI.

LAT...LON 3169 8836 3143 8833 3144 8856 3171 8876
TIME...MOT...LOC 2228Z 164DEG 17KT 3171 8859

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:15 PM CDTSevere Thunderstorm WarningMOBChoctaw60 min
May 31, 3:02 PM CDTSevere Thunderstorm WarningMOBButler58 min
May 31, 5:05 PM CDTSevere Thunderstorm WarningMOBClarke, Washington40 min
May 31, 5:59 PM CDTSevere Thunderstorm WarningMOBChoctaw46 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Severe 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; radar from the NEXRAD Level II archive.