Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 48, NWS Mobile, AL

August 30, 2012Covington County, Alabama

NWS Mobile, AL issued this tornado warning at Aug 30, 2012, 2:46 AM CDT for Covington County, Alabama. It was in force for 33 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: Aug 30, 2012, 2:46 AM CDT (07:46 UTC)
Expired: Aug 30, 2012, 3:19 AM CDT
In force: 33 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Covington County, AL

The radar

The Eglin Afb radar (KEVX), 75 km from the middle of the area, began a volume at 07:48 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 7.8 hours before the alert went out and 205 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: 837 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

456 
WFUS54 KMOB 300746
TORMOB
ALC039-300830-
/O.NEW.KMOB.TO.W.0048.120830T0746Z-120830T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
246 AM CDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 330 AM CDT

* AT 244 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES EAST OF FLORALA...OR 6 MILES EAST OF
  LOCKHART...MOVING NORTH AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HORN HILL...          SANFORD...            OPP...
  ONYCHA...             LOCKHART...           FLORALA...
  BABBIE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
STRONG ROTATION HAS BEEN DETECTED AND A TORNADO MAY ALREADY BE ON THE
GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM CDT THURSDAY MORNING
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3099 8619 3099 8636 3143 8641 3145 8620
      3144 8619 3100 8618
TIME...MOT...LOC 0747Z 179DEG 35KT 3101 8625

$$

2 follow-up statements

228 
WWUS54 KMOB 300805
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
305 AM CDT THU AUG 30 2012

ALC039-300830-
/O.CON.KMOB.TO.W.0048.000000T0000Z-120830T0830Z/
COVINGTON AL-
305 AM CDT THU AUG 30 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 AM CDT FOR EASTERN
COVINGTON COUNTY...

AT 302 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 7 MILES NORTHEAST OF FLORALA...OR 8 MILES NORTHEAST OF
LOCKHART...MOVING NORTH AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  HORN HILL...          SANFORD...            OPP...
  ONYCHA...             BABBIE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
STRONG ROTATION HAS BEEN DETECTED AND A TORNADO MAY ALREADY BE ON THE
GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

&&

LAT...LON 3105 8625 3107 8636 3143 8641 3145 8624
      3144 8619 3109 8618
TIME...MOT...LOC 0805Z 170DEG 29KT 3112 8628

$$

160 
WWUS54 KMOB 300819
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
319 AM CDT THU AUG 30 2012

ALC039-300829-
/O.CAN.KMOB.TO.W.0048.000000T0000Z-120830T0830Z/
COVINGTON AL-
319 AM CDT THU AUG 30 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR EASTERN COVINGTON
COUNTY...

AT 316 AM CDT...THE STORM THAT PROMPTED THE WARNING FOR EASTERN
COVINGTON COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE
TORNADO WARNING HAS BEEN CANCELLED.

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

LAT...LON 3105 8625 3107 8636 3143 8641 3145 8624
      3144 8619 3109 8618
TIME...MOT...LOC 0819Z 170DEG 29KT 3123 8630

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 7:27 PM CDT	Tornado Warning	MOB	Monroe, Wilcox	30 min
Aug 29, 7:29 PM CDT	Small Craft Advisory	MOB		33 hr
Aug 29, 7:45 PM CDT	Coastal Flood Warning	MOB		21 hr
Aug 30, 12:22 AM CDT	Flash Flood Warning	MOB	Mobile, Washington	6 hr
Aug 30, 12:52 AM CDT	Wind Advisory	MOB	Washington	16 hr
Aug 30, 2:28 AM CDT	Areal Flood Warning	MOB	Mobile, Washington	12 hr
Aug 30, 3:53 AM CDT	Tornado Warning	MOB	Covington, Escambia	37 min
Aug 30, 4:09 AM CDT	Tornado Warning	MOB	Butler, Crenshaw	16 min
Aug 30, 4:31 AM CDT	Tornado Warning	MOB	Washington	29 min
Aug 30, 4:32 AM CDT	Tornado Warning	MOB	Covington	28 min
Aug 30, 6:43 AM CDT	Tornado Warning	MOB	Choctaw, Washington	37 min
Aug 30, 7:41 AM CDT	Tornado Warning	MOB	Mobile	33 min
Aug 30, 8:10 AM CDT	Tornado Warning	MOB	Choctaw, Washington	35 min
Aug 30, 8:13 AM CDT	Tornado Warning	MOB	Washington	32 min
Aug 30, 8:45 AM CDT	Tornado Warning	MOB	Choctaw, Washington	45 min
Aug 30, 9:01 AM CDT	Tornado Warning	MOB	Mobile, Washington	44 min
Aug 30, 10:16 AM CDT	Tornado Warning	MOB	Choctaw, Washington	44 min
Aug 30, 10:56 AM CDT	Tornado Warning	MOB	Choctaw	49 min
Aug 30, 11:32 AM CDT	Severe Thunderstorm Warning	MOB	Mobile	43 min
Aug 30, 11:44 AM CDT	Flash Flood Warning	MOB	Mobile, Washington	6 hr
Aug 30, 11:56 AM CDT	Tornado Warning	MOB	Choctaw	33 min
Aug 30, 4:29 PM CDT	High Surf Advisory	MOB		20 hr

Nearby

Tornado Warnings in Alabama, 2012 Every tornado warning in 2012 Tornadoes 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.