Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 12, NWS Mobile, AL

February 18, 2012George County, Stone County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Feb 18, 2012, 1:13 PM CST for George County, Stone County, Mississippi. It was in force for 47 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: Feb 18, 2012, 1:13 PM CST (19:13 UTC)
Expired: Feb 18, 2012, 2:00 PM CST
In force: 47 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties George County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 53 km from the middle of the area, began a volume at 19:14 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.

Issued	Product	Office	Lasted
Feb 18, 11:49 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.2 hours before the alert went out and 109 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 449 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 177 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.

168 
WUUS54 KMOB 181913
SVRMOB
MSC039-131-182000-
/O.NEW.KMOB.SV.W.0012.120218T1913Z-120218T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
113 PM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  EASTERN STONE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 200 PM CST

* AT 113 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTH OF WIGGINS
  TO 11 MILES SOUTH OF WIGGINS TO 15 MILES NORTHWEST OF GULFPORT...
  AND MOVING EAST AT 60 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  LUCEDALE AROUND 140 PM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

HAIL UP TO GOLF BALL SIZE HAS BEEN REPORTED IN MCHENRY WITH THIS 
STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION 
TO PROTECT LIFE AND PROPERTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CST SATURDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3075 8894 3091 8894 3091 8883 3100 8883
      3099 8842 3077 8841 3073 8842 3073 8888
      3067 8889 3068 8896
TIME...MOT...LOC 1911Z 269DEG 51KT 3094 8908 3071 8904
          3057 8914

$$

JP/MB

1 follow-up statement

936 
WWUS54 KMOB 181939
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
139 PM CST SAT FEB 18 2012

MSC131-181949-
/O.CAN.KMOB.SV.W.0012.000000T0000Z-120218T2000Z/
STONE MS-
139 PM CST SAT FEB 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN STONE COUNTY IS
CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CST SATURDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3100 8883 3099 8842 3077 8841 3073 8842
      3073 8876 3073 8882
TIME...MOT...LOC 1939Z 265DEG 46KT 3089 8873 3075 8868
          3066 8873

$$

MSC039-182000-
/O.CON.KMOB.SV.W.0012.000000T0000Z-120218T2000Z/
GEORGE MS-
139 PM CST SAT FEB 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CST
FOR GEORGE COUNTY...

AT 139 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF
BALL SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE 
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 10 MILES WEST OF 
LUCEDALE TO 14 MILES SOUTHWEST OF LUCEDALE TO 16 MILES NORTHEAST OF 
ST. MARTIN...MOVING EAST AT 55 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  BEXLEY...CENTRAL AND BARTON BY 145 PM CST...
  EVANSTON...LUCEDALE...ROCK CREEK AND WARD BY 150 PM CST...
  WATERS LANDING...HOWELL AND DEAN LANDING BY 155 PM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CST SATURDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3100 8883 3099 8842 3077 8841 3073 8842
      3073 8876 3073 8882
TIME...MOT...LOC 1939Z 265DEG 46KT 3089 8873 3075 8868
          3066 8873

$$

JP/MB

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 18, 9:48 AM CST	River Flood Warning	MOB	George, Greene, Perry	6 days
Feb 18, 9:48 AM CST	River Flood Warning	MOB	George, Greene, Wayne	6 days
Feb 18, 12:39 PM CST	Severe Thunderstorm Warning	MOB	Perry, Stone	51 min
Feb 18, 1:17 PM CST	Tornado Warning	MOB	George, Stone	13 min
Feb 18, 1:35 PM CST	Areal Flood Advisory	MOB	Perry, Stone	115 min
Feb 18, 1:36 PM CST	Tornado Warning	MOB	George, Greene	39 min
Feb 18, 1:56 PM CST	Severe Thunderstorm Warning	MOB	George	49 min
Feb 18, 2:28 PM CST	Flash Flood Warning	MOB	George, Greene, Perry, Stone	32 days
Feb 18, 4:05 PM CST	Areal Flood Warning	MOB	George, Greene, Perry, Stone, Wayne	34 days
Feb 18, 4:30 PM CST	Flash Flood Warning	MOB	George, Greene, Perry	60 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2012 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.