Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 10, NWS Mobile, AL

February 28, 2011Clarke County, Monroe County, Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 28, 2011, 5:07 PM CST for Clarke County, Monroe County, Wilcox County, Alabama. It was in force for 53 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 28, 2011, 5:07 PM CST (23:07 UTC)
Expired: Feb 28, 2011, 6:00 PM CST
In force: 53 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Clarke County, AL, Monroe County, AL, Wilcox County, AL

The radar

The Birmingham radar (KBMX), 139 km from the middle of the area, began a volume at 23:07 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.1 hours before the alert went out and 139 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: 652 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 498 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 425 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

282 
WUUS54 KMOB 282307
SVRMOB
ALC025-099-131-010000-
/O.NEW.KMOB.SV.W.0010.110228T2307Z-110301T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
507 PM CST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL MONROE COUNTY IN SOUTH CENTRAL ALABAMA...  
  WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHEASTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 600 PM CST

* AT 504 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 15 MILES NORTHWEST OF CAMDEN TO
  12 MILES NORTHEAST OF THOMASVILLE TO 9 MILES WEST OF THOMASVILLE...
  AND MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FULTON...PINE HILL AND THOMASVILLE AROUND 515 PM CST...
  CANTON BEND AROUND 520 PM CST...
  YELLOW BLUFF AND BOYKIN AROUND 525 PM CST...
  CAMDEN AROUND 535 PM CST...
  VREDENBURGH AROUND 545 PM CST...
  SNOW HILL AND OAK HILL AROUND 555 PM CST...

&&

LAT...LON 3210 8721 3209 8718 3206 8716 3206 8698
      3202 8688 3163 8762 3190 8790 3200 8792
      3201 8763 3214 8762 3214 8753 3219 8752
      3219 8730
TIME...MOT...LOC 2307Z 267DEG 45KT 3214 8746 3204 8755
          3190 8785

$$

4 follow-up statements

504 
WWUS54 KMOB 282323
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
523 PM CST MON FEB 28 2011

ALC025-099-131-010000-
/O.CON.KMOB.SV.W.0010.000000T0000Z-110301T0000Z/
MONROE AL-CLARKE AL-WILCOX AL-
523 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CST
FOR WILCOX...EAST CENTRAL CLARKE AND NORTH CENTRAL MONROE COUNTIES...

AT 518 PM CST...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS OVER 60 MPH.  THESE STORMS WERE ALONG A 
LINE EXTENDING FROM 7 MILES NORTHEAST OF CAMDEN TO 6 MILES WEST OF 
CAMDEN TO THOMASVILLE...MOVING SOUTHEAST AT 35 MPH.  INDIVIDUAL 
THUNDERSTORMS ALONG THE LINE WERE MOVING 35 TO 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  PEBBLE HILL...ESTELLE...COY AND SHAWNEE AROUND 530 PM CST...
  ACKERVILLE...NELLIE...DRY FORKS AND ASAHEL AROUND 535 PM CST...
  ROSEBUD AND SCYRENE AROUND 540 PM CST...

LAT...LON 3181 8780 3193 8767 3200 8762 3207 8743
      3213 8724 3210 8721 3209 8718 3206 8716
      3206 8698 3202 8688 3163 8762
TIME...MOT...LOC 2323Z 308DEG 21KT 3203 8717 3196 8737
          3183 8772

$$

378 
WWUS54 KMOB 282334
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
534 PM CST MON FEB 28 2011

ALC025-099-131-010000-
/O.CON.KMOB.SV.W.0010.000000T0000Z-110301T0000Z/
MONROE AL-CLARKE AL-WILCOX AL-
534 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CST
FOR SOUTHERN WILCOX...EAST CENTRAL CLARKE AND NORTH CENTRAL MONROE
COUNTIES...

AT 528 PM CST... CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS OVER 60 MPH.  THESE STORMS WERE ALONG A LINE EXTENDING
FROM 10 MILES EAST OF CAMDEN TO CAMDEN TO 11 MILES SOUTHEAST OF 
THOMASVILLE...MOVING SOUTHEAST AT 35 MPH. INDIVIDUAL THUNDERSTORMS 
WERE MOVING SOUTHEAST AT 35 TO 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  SNOW HILL...HAMBURG...OAK HILL AND MCBRYDES AROUND 540 PM CST...
  FURMAN AND ALLENTON AROUND 545 PM CST...

LAT...LON 3167 8755 3186 8762 3193 8753 3199 8739
      3210 8721 3209 8718 3206 8716 3206 8698
      3202 8688
TIME...MOT...LOC 2333Z 301DEG 31KT 3203 8708 3194 8718
          3190 8733 3179 8755

$$

791 
WWUS54 KMOB 282348
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
548 PM CST MON FEB 28 2011

ALC025-282357-
/O.CAN.KMOB.SV.W.0010.000000T0000Z-110301T0000Z/
CLARKE AL-
548 PM CST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CLARKE COUNTY IS
CANCELLED...

LAT...LON 3172 8747 3183 8749 3189 8740 3195 8727
      3206 8709 3206 8698 3202 8688
TIME...MOT...LOC 2347Z 285DEG 39KT 3201 8689 3192 8699
          3188 8714 3177 8736

$$

ALC099-131-010000-
/O.CON.KMOB.SV.W.0010.000000T0000Z-110301T0000Z/
MONROE AL-WILCOX AL-
548 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CST
FOR SOUTHEASTERN WILCOX AND NORTH CENTRAL MONROE COUNTIES...

AT 541 PM CST... CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS OVER 60 MPH.  THESE STORMS WERE ALONG A LINE EXTENDING
FROM FURMAN TO ALLENTON TO FATAMA TO TINELA...MOVING EAST AT 45 MPH.

THIS SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 6 PM 
UNLESS THE PORTION OF THE THUNDERSTORM LINE NEAR FATAMA INTENSIFIES 
ONCE AGAIN...AND THEN THE WARNING WOULD LIKELY BE ISSUE FOR NORTHERN 
MONROE COUNTY.

LAT...LON 3172 8747 3183 8749 3189 8740 3195 8727
      3206 8709 3206 8698 3202 8688
TIME...MOT...LOC 2347Z 285DEG 39KT 3201 8689 3192 8699
          3188 8714 3177 8736

$$

548 
WWUS54 KMOB 282351
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
551 PM CST MON FEB 28 2011

ALC099-131-010002-
/O.EXP.KMOB.SV.W.0010.000000T0000Z-110301T0000Z/
MONROE AL-WILCOX AL-
551 PM CST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILCOX AND NORTH
CENTRAL MONROE COUNTIES WILL EXPIRE AT 600 PM CST...

LAT...LON 3172 8747 3183 8749 3189 8740 3195 8727
      3206 8709 3206 8698 3202 8688
TIME...MOT...LOC 2352Z 285DEG 39KT 3200 8683 3191 8693
          3187 8708 3176 8730

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 4:00 AM CST	Wind Advisory	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	11 hr
Feb 28, 7:28 AM CST	Marine Dense Fog Advisory	MOB		4 hr
Feb 28, 4:33 PM CST	Severe Thunderstorm Warning	MOB	Wilcox	22 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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.