Alert archive / Mississippi / Tornado Warnings in 2013

Tornado Warning 19, NWS Mobile, AL

April 11, 2013Washington County, Alabama; Greene County, Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this tornado warning at Apr 11, 2013, 2:18 PM CDT for Washington County, Alabama; Greene County, Perry County, Wayne County, Mississippi. It was in force for 42 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 11, 2013, 2:18 PM CDT (19:18 UTC)
Expired: Apr 11, 2013, 3:00 PM CDT
In force: 42 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Washington County, AL, Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 89 km from the middle of the area, began a volume at 19:20 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
Apr 11, 1:30 PM CDT	Tornado Watch	SPC	8 hr
Apr 11, 8:00 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.3 hours before the alert went out and 171 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: 1207 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

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

732 
WFUS54 KMOB 111918
TORMOB
ALC129-MSC041-111-153-112000-
/O.NEW.KMOB.TO.W.0019.130411T1918Z-130411T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
218 PM CDT THU APR 11 2013

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  EAST CENTRAL PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHEASTERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 300 PM CDT

* AT 216 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 12 MILES SOUTH OF RICHTON...OR 3 MILES EAST OF
  BEAUMONT...MOVING NORTHEAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  STATE LINE...         BEAUMONT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT THURSDAY AFTERNOON
FOR SOUTHEAST MISSISSIPPI. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTHWESTERN ALABAMA AND
NORTHWEST FLORIDA.

&&

LAT...LON 3167 8837 3153 8822 3110 8886 3119 8895
TIME...MOT...LOC 1918Z 229DEG 46KT 3120 8885

$$

1 follow-up statement

899 
WWUS54 KMOB 111931
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
231 PM CDT THU APR 11 2013

ALC129-MSC041-111-153-111941-
/O.CAN.KMOB.TO.W.0019.000000T0000Z-130411T2000Z/
WASHINGTON AL-WAYNE MS-PERRY MS-GREENE MS-
231 PM CDT THU APR 11 2013

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTHERN GREENE...EAST
CENTRAL PERRY...SOUTHEASTERN WAYNE AND NORTHWESTERN WASHINGTON
COUNTIES...

AT 230 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHERN
GREENE...EAST CENTRAL PERRY...SOUTHEASTERN WAYNE AND NORTHWESTERN
WASHINGTON COUNTIES HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE
TORNADO WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT THURSDAY AFTERNOON
FOR SOUTHEAST MISSISSIPPI. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTHWESTERN ALABAMA AND
NORTHWEST FLORIDA.

LAT...LON 3167 8837 3153 8822 3110 8886 3119 8895
TIME...MOT...LOC 1931Z 229DEG 46KT 3131 8870

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 3:47 AM CDT	Rip Current Statement	MOB		20 hr
Apr 11, 3:49 AM CDT	Wind Advisory	MOB	Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more	15 hr
Apr 11, 1:41 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	64 min
Apr 11, 2:16 PM CDT	Tornado Warning	MOB	Choctaw	44 min
Apr 11, 2:36 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke	39 min
Apr 11, 2:44 PM CDT	Severe Thunderstorm Warning	MOB	Washington	31 min
Apr 11, 4:06 PM CDT	Special Marine Warning	MOB		84 min
Apr 11, 5:21 PM CDT	Special Marine Warning	MOB		84 min
Apr 11, 5:27 PM CDT	Flash Flood Warning	MOB	Clarke	6 hr
Apr 11, 5:27 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	33 min
Apr 11, 5:43 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	32 min
Apr 11, 6:06 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	24 min
Apr 11, 6:32 PM CDT	Special Marine Warning	MOB		88 min
Apr 11, 1:19 PM CDT	Tornado Warning	MOB	George, Greene, Perry, Stone	41 min
Apr 11, 1:24 PM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	51 min
Apr 11, 1:52 PM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	53 min
Apr 11, 2:24 PM CDT	Severe Thunderstorm Warning	MOB	George, Stone	66 min

Nearby

Tornado Warnings in Mississippi, 2013 Tornado Warnings in Alabama, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.