Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 88, NWS Mobile, AL

April 28, 2011Covington County, Alabama

NWS Mobile, AL issued this tornado warning at Apr 28, 2011, 1:02 AM CDT for Covington County, Alabama. It was in force for 13 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: Apr 28, 2011, 1:02 AM CDT (06:02 UTC)
Expired: Apr 28, 2011, 1:15 AM CDT
In force: 13 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Covington County, AL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 6.0 hours before the alert went out and 210 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: 3101 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 13.8

Open this sounding in Storm Lab

The text

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

184 
WFUS54 KMOB 280602
TORMOB
ALC039-280615-
/O.NEW.KMOB.TO.W.0088.110428T0602Z-110428T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
102 AM CDT THU APR 28 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...
  THIS INCLUDES THE CITY OF OPP...

* UNTIL 115 AM CDT

* AT 101 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR OPP...OR
  NEAR ONYCHA...MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  ESTOTHEL...BLAIRS AND COUNTY LINE AROUND 110 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT THURSDAY MORNING
FOR SOUTH CENTRAL ALABAMA.

&&

LAT...LON 3118 8633 3127 8638 3135 8619 3130 8618
      3118 8618
TIME...MOT...LOC 0602Z 257DEG 28KT 3123 8627

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 7:21 PM CDT	Tornado Warning Emergency	MOB	Choctaw	39 min
Apr 27, 8:00 PM CDT	Tornado Warning	MOB	Choctaw	60 min
Apr 27, 9:42 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	33 min
Apr 28, 3:27 AM CDT	Special Marine Warning	MOB		48 min

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.