Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Mobile, AL

February 1, 2011Choctaw County, Clarke County, Washington County, Alabama; Greene County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Feb 1, 2011, 3:59 PM CST for Choctaw County, Clarke County, Washington County, Alabama; Greene County, Wayne County, Mississippi. It was in force for 34 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 1, 2011, 3:59 PM CST (21:59 UTC)
Expired: Feb 1, 2011, 4:33 PM CST
In force: 34 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Clarke County, AL, Washington County, AL, Greene County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 112 km from the middle of the area, began a volume at 22:03 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 1, 1:03 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.0 hours before the alert went out and 184 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: 768 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 306 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.

124 
WUUS54 KMOB 012159
SVRMOB
ALC023-025-129-MSC041-153-012245-
/O.NEW.KMOB.SV.W.0004.110201T2159Z-110201T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
359 PM CST TUE FEB 1 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  EASTERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  CLARKE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITIES OF...THOMASVILLE...JACKSON...GROVE HILL...
  NORTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF CHATOM...

* UNTIL 445 PM CST

* AT 354 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 18 MILES NORTHEAST OF WAYNESBORO TO 16 MILES WEST OF CHATOM
  TO 8 MILES NORTHWEST OF LEAKESVILLE...AND WAS MOVING NORTHEAST AT  
  55 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  TOXEY AROUND 405 PM CST...
  MILLRY AROUND 410 PM CST...
  CHATOM AROUND 425 PM CST...
  COFFEEVILLE AROUND 430 PM CST...
  JACKSON AROUND 445 PM CST...

THE MAIN THREAT WILL BE SEVERE THUNDERSTORM WIND GUSTS FROM 60 TO 
65 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3200 8807 3200 8776 3146 8760 3123 8869
      3137 8858 3146 8858 3153 8859 3161 8852
      3183 8853 3201 8808
TIME...MOT...LOC 2156Z 231DEG 48KT 3184 8837 3161 8842
          3153 8852 3144 8849 3126 8861

$$

2 follow-up statements

734 
WWUS54 KMOB 012216
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
416 PM CST TUE FEB 1 2011

MSC041-153-012226-
/O.CAN.KMOB.SV.W.0004.000000T0000Z-110201T2245Z/
GREENE MS-WAYNE MS-
416 PM CST TUE FEB 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WAYNE AND NORTHEASTERN
GREENE COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3200 8807 3200 8776 3146 8760 3129 8844
      3136 8844 3157 8830 3169 8832 3195 8821
      3199 8815 3201 8808
TIME...MOT...LOC 2216Z 229DEG 67KT 3204 8801 3185 8808
          3176 8809 3165 8804 3139 8819

$$

ALC023-025-129-012245-
/O.CON.KMOB.SV.W.0004.000000T0000Z-110201T2245Z/
WASHINGTON AL-CLARKE AL-CHOCTAW AL-
416 PM CST TUE FEB 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CST
FOR SOUTHEASTERN CHOCTAW...CLARKE AND NORTHERN WASHINGTON COUNTIES...

AT 412 PM CST...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS
OVER 60 MPH.  THESE STORMS WERE ALONG A LINE EXTENDING FROM SLATER TO
WEST BEND TO BIGBEE TO TIBBIE...MOVING NORTHEAST AT 55 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  SUNFLOWER AROUND 420 PM CST...
  WAGER...MCENTYRE...CORTELYOU AND CLARKSVILLE AROUND 425 PM CST...
  ROCKVILLE...ZIMCO...GLOVER AND WINN AROUND 430 PM CST...
  MANILA AROUND 435 PM CST...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY ON THE LOWEST
FLOOR OF A STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A
ROOM SUCH AS A CLOSET OR BATHROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3200 8807 3200 8776 3146 8760 3129 8844
      3136 8844 3157 8830 3169 8832 3195 8821
      3199 8815 3201 8808
TIME...MOT...LOC 2216Z 229DEG 67KT 3204 8801 3185 8808
          3176 8809 3165 8804 3139 8819

$$

182 
WWUS54 KMOB 012233
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
433 PM CST TUE FEB 1 2011

ALC023-025-129-012241-
/O.CAN.KMOB.SV.W.0004.000000T0000Z-110201T2245Z/
WASHINGTON AL-CLARKE AL-CHOCTAW AL-
433 PM CST TUE FEB 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHOCTAW...CLARKE
AND NORTHERN WASHINGTON COUNTIES IS CANCELLED...

THESE THUNDERSTORMS HAVE FALLEN BELOW SEVERE LIMITS DURING THE PAST 
15 MINUTES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CST TUESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3200 8807 3200 8776 3146 8760 3129 8844
      3136 8844 3157 8830 3169 8832 3195 8821
      3199 8815 3201 8808
TIME...MOT...LOC 2231Z 229DEG 67KT 3222 8776 3203 8783
          3194 8784 3183 8779 3157 8794

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 31, 9:04 PM CST	Wind Advisory	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	23 hr
Feb 1, 1:48 AM CST	Dense Fog Advisory	MOB		8 hr
Feb 1, 2:14 AM CST	Marine Dense Fog Advisory	MOB		7 hr
Feb 1, 3:09 PM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	51 min
Feb 1, 4:45 PM CST	Special Marine Warning	MOB		90 min
Feb 1, 4:48 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	42 min
Feb 1, 3:59 PM CST	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	46 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Severe Thunderstorm Warnings in Mississippi, 2011 Every 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.