Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 146, NWS Mobile, AL

November 16, 2011Clarke County, Monroe County, Wilcox County, Alabama

NWS Mobile, AL issued this tornado warning at Nov 16, 2011, 9:29 AM CST for Clarke County, Monroe County, Wilcox County, Alabama. It was in force for 37 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: Nov 16, 2011, 9:29 AM CST (15:29 UTC)
Expired: Nov 16, 2011, 10:06 AM CST
In force: 37 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), 135 km from the middle of the area, began a volume at 15:29 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
Nov 16, 2:20 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 3.5 hours before the alert went out and 136 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: 990 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

811 
WFUS54 KMOB 161529
TORMOB
ALC025-099-131-161630-
/O.NEW.KMOB.TO.W.0146.111116T1529Z-111116T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
929 AM CST WED NOV 16 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTH CENTRAL MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHEASTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1030 AM CST

* AT 926 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 14 MILES WEST OF
  CAMDEN...OR 4 MILES NORTHEAST OF PINE HILL...MOVING NORTHEAST AT 40
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             YELLOW BLUFF...       PINE HILL...
  COY...                CATHERINE...          CAMDEN...
  ALBERTA...            FULTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3224 8739 3221 8737 3220 8733 3214 8724
      3210 8722 3208 8719 3182 8723 3178 8778
      3197 8775 3199 8773 3201 8763 3213 8763
      3214 8762 3214 8753 3225 8753 3227 8752
      3228 8745
TIME...MOT...LOC 1529Z 237DEG 36KT 3203 8751

$$

2 follow-up statements

941 
WWUS54 KMOB 161550
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
950 AM CST WED NOV 16 2011

ALC025-161557-
/O.CAN.KMOB.TO.W.0146.000000T0000Z-111116T1630Z/
CLARKE AL-
950 AM CST WED NOV 16 2011

...THE TORNADO WARNING FOR NORTHEASTERN CLARKE COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY FOR
SOUTHEAST MISSISSIPPI. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
600 PM CST WEDNESDAY EVENING FOR SOUTHWESTERN ALABAMA AND NORTHWEST
FLORIDA.

LAT...LON 3215 8727 3214 8725 3211 8723 3208 8719
      3182 8723 3180 8752 3181 8750 3183 8750
      3183 8757 3195 8752 3212 8743 3217 8738
      3220 8733
TIME...MOT...LOC 1547Z 242DEG 46KT 3214 8724

$$

ALC099-131-161630-
/O.CON.KMOB.TO.W.0146.000000T0000Z-111116T1630Z/
MONROE AL-WILCOX AL-
950 AM CST WED NOV 16 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR CENTRAL
WILCOX AND EXTREME NORTH CENTRAL MONROE COUNTIES...

AT 945 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUES TO 
INDICATE ROTATION WITHIN THIS LINE OF STORMS.  THESE STRONGEST OF 
THESE STORMS WITHIN THE LINE WAS LOCATED NEAR BOYKIN...OR 8 MILES 
NORTH OF CAMDEN...MOVING NORTHEAST AT 40 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CST WEDNESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

&&

LAT...LON 3215 8727 3214 8725 3211 8723 3208 8719
      3182 8723 3180 8752 3181 8750 3183 8750
      3183 8757 3195 8752 3212 8743 3217 8738
      3220 8733
TIME...MOT...LOC 1547Z 242DEG 46KT 3214 8724

$$

039 
WWUS54 KMOB 161606
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1006 AM CST WED NOV 16 2011

ALC099-131-161615-
/O.CAN.KMOB.TO.W.0146.000000T0000Z-111116T1630Z/
MONROE AL-WILCOX AL-
1006 AM CST WED NOV 16 2011

...THE TORNADO WARNING FOR CENTRAL WILCOX AND NORTH CENTRAL MONROE
COUNTIES IS CANCELLED...

THE STORMS THAT PROMPTED THE WARNING HAVE DECREASED IN INTENSITY AND 
THEREFORE...DO NOT REQUIRE A WARNING ANY FURTHER. THE ENVIRONMENT IS 
STILL FAVORABLE FOR ADDITIONAL SEVERE WEATHER THROUGHOUT THE DAY.  
BE ALERT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CST WEDNESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA.

LAT...LON 3215 8727 3214 8725 3211 8723 3208 8719
      3182 8723 3180 8752 3181 8750 3183 8750
      3183 8757 3195 8752 3212 8743 3217 8738
      3220 8733
TIME...MOT...LOC 1605Z 242DEG 46KT 3225 8700

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 16, 6:37 AM CST	Tornado Warning	MOB	Choctaw	34 min
Nov 16, 7:35 AM CST	Tornado Warning	MOB	Washington	40 min
Nov 16, 8:27 AM CST	Tornado Warning	MOB	Choctaw, Clarke	63 min
Nov 16, 9:13 AM CST	Tornado Warning	MOB	Clarke, Monroe, Washington	47 min
Nov 16, 9:51 AM CST	Special Marine Warning	MOB		114 min
Nov 16, 10:26 AM CST	Special Marine Warning	MOB		2 hr
Nov 16, 10:35 AM CST	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Crenshaw, Monroe, Wilcox	55 min
Nov 16, 10:39 AM CST	Tornado Warning	MOB	Butler, Crenshaw, Monroe, Wilcox	55 min
Nov 16, 10:48 AM CST	Small Craft Advisory	MOB		46 hr
Nov 16, 11:45 AM CST	Special Marine Warning	MOB		2 hr
Nov 16, 1:02 PM CST	Special Marine Warning	MOB		97 min
Nov 16, 2:33 PM CST	Fire Weather Watch	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	15 hr

Nearby

Tornado Warnings in Alabama, 2011 Every tornado warning in 2011 Tornadoes 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.