Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 63, NWS Mobile, AL

April 15, 2011Greene County, Perry County, Mississippi

NWS Mobile, AL issued this tornado warning at Apr 15, 2011, 6:38 PM CDT for Greene County, Perry County, Mississippi. 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: Apr 15, 2011, 6:38 PM CDT (23:38 UTC)
Expired: Apr 15, 2011, 7:15 PM CDT
In force: 37 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Greene County, MS, Perry County, MS

The radar

The Mobile radar (KMOB), 77 km from the middle of the area, began a volume at 23:39 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 15, 11:21 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.6 hours before the alert went out and 152 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: 2339 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 325 m²/s²
0-3 km storm-relative helicity: 504 m²/s²
Significant tornado parameter: 4.8
Supercell composite: 21.3

Open this sounding in Storm Lab

The text

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

643 
WFUS54 KMOB 152338
TORMOB
MSC041-111-160015-
/O.NEW.KMOB.TO.W.0063.110415T2338Z-110416T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
638 PM CDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF LEAKESVILLE...
  EAST CENTRAL PERRY COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 715 PM CDT

* AT 635 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 17 MILES SOUTH
  OF RICHTON...OR NEAR MCLAIN...MOVING NORTHEAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  LEAKESVILLE AROUND 655 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 900 PM CDT FRIDAY EVENING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3144 8859 3144 8845 3120 8844 3100 8885
      3114 8898
TIME...MOT...LOC 2338Z 230DEG 40KT 3113 8883

$$

3 follow-up statements

302 
WWUS54 KMOB 152347
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
647 PM CDT FRI APR 15 2011

MSC111-152356-
/O.CAN.KMOB.TO.W.0063.000000T0000Z-110416T0015Z/
PERRY MS-
647 PM CDT FRI APR 15 2011

...THE TORNADO WARNING FOR EAST CENTRAL PERRY COUNTY IS CANCELLED...

AT 644 PM CDT...THE STORM THAT PROMPTED THE WARNING HAS MOVED EAST 
OUT OF EAST CENTRAL PERRY COUNTY...THUS THE TORNADO WARNING IS 
CANCELLED FOR THIS PORTION OF PERRY COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY EVENING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8859 3144 8845 3120 8844 3106 8882
      3123 8883
TIME...MOT...LOC 2346Z 230DEG 40KT 3119 8875

$$

MSC041-160015-
/O.CON.KMOB.TO.W.0063.000000T0000Z-110416T0015Z/
GREENE MS-
647 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR GREENE
COUNTY...

AT 644 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS NEAR NEELY...OR ABOUT 13 MILES WEST OF LEAKESVILLE...
MOVING NORTHEAST AT 45 MPH.

THE TORNADO WILL BE NEAR...
  JONATHAN AND AVERA AROUND 655 PM CDT...
  CLARK AROUND 700 PM CDT...
  OLD AVERA AROUND 705 PM CDT...
  KNOBTOWN AND KITTRELL AROUND 710 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A ROOM SUCH AS
A CLOSET OR BATHROOM. IF POSSIBLE...GET UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY
AND ALWAYS STAY AWAY FROM WINDOWS.

IF YOU ARE IN MOBILE HOME...EVACUATE IT AND GET ON THE LOWEST FLOOR
OF A NEARBY STURDY BUILDING OR IN AN UNDERGROUND STORM SHELTER. IF NO
SUBSTANTIAL SHELTER IS AVAILABLE AND A TORNADO IS FAST APPROACHING...
SEEK SHELTER IN A CULVERT...OR LIE FLAT IN THE NEAREST DITCH OR OTHER
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY EVENING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8859 3144 8845 3120 8844 3106 8882
      3123 8883
TIME...MOT...LOC 2346Z 230DEG 40KT 3119 8875

$$

726 
WWUS54 KMOB 152357
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
657 PM CDT FRI APR 15 2011

MSC041-160015-
/O.CON.KMOB.TO.W.0063.000000T0000Z-110416T0015Z/
GREENE MS-
657 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHERN
GREENE COUNTY...

AT 653 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS NEAR BYRD...OR ABOUT 10 MILES WEST OF LEAKESVILLE...
MOVING NORTHEAST AT 45 MPH.

THE TORNADO WILL BE NEAR...
  CLARK AROUND 705 PM CDT...
  OLD AVERA AROUND 710 PM CDT...
  KNOBTOWN AND KITTRELL AROUND 715 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A ROOM SUCH AS
A CLOSET OR BATHROOM. IF POSSIBLE...GET UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY
AND ALWAYS STAY AWAY FROM WINDOWS.

IF YOU ARE IN MOBILE HOME...EVACUATE IT AND GET ON THE LOWEST FLOOR
OF A NEARBY STURDY BUILDING OR IN AN UNDERGROUND STORM SHELTER. IF NO
SUBSTANTIAL SHELTER IS AVAILABLE AND A TORNADO IS FAST APPROACHING...
SEEK SHELTER IN A CULVERT...OR LIE FLAT IN THE NEAREST DITCH OR OTHER
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY EVENING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8859 3144 8845 3121 8844 3120 8845
      3113 8871 3123 8876
TIME...MOT...LOC 2357Z 234DEG 37KT 3122 8867

$$

840 
WWUS54 KMOB 160008
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
708 PM CDT FRI APR 15 2011

MSC041-160015-
/O.CON.KMOB.TO.W.0063.000000T0000Z-110416T0015Z/
GREENE MS-
708 PM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHEASTERN GREENE COUNTY...

AT 702 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS NEAR CLARK...OR ABOUT 7 MILES NORTHWEST OF LEAKESVILLE...
MOVING NORTHEAST AT 50 MPH. 

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A 
STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A ROOM SUCH AS
A CLOSET OR BATHROOM. IF POSSIBLE...GET UNDER A WORKBENCH OR OTHER 
PIECE OF STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY
AND ALWAYS STAY AWAY FROM WINDOWS.

IF YOU ARE IN MOBILE HOME...EVACUATE IT AND GET ON THE LOWEST FLOOR
OF A NEARBY STURDY BUILDING OR IN AN UNDERGROUND STORM SHELTER. IF NO
SUBSTANTIAL SHELTER IS AVAILABLE AND A TORNADO IS FAST APPROACHING...
SEEK SHELTER IN A CULVERT...OR LIE FLAT IN THE NEAREST DITCH OR OTHER
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY EVENING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8859 3144 8845 3121 8844 3120 8845
      3119 8861 3131 8864
TIME...MOT...LOC 0007Z 236DEG 41KT 3128 8855

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 10:15 AM CDT	Tornado Warning	MOB	Wayne	45 min
Apr 15, 10:34 AM CDT	Tornado Warning	MOB	Greene, Perry	41 min
Apr 15, 10:56 AM CDT	Tornado Warning	MOB	Wayne	49 min
Apr 15, 11:09 AM CDT	Tornado Warning	MOB	Greene, Wayne	51 min
Apr 15, 11:35 AM CDT	Tornado Warning	MOB	Wayne	40 min
Apr 15, 2:06 PM CDT	Severe Thunderstorm Warning	MOB	George, Greene	39 min
Apr 15, 5:59 PM CDT	Tornado Warning	MOB	Wayne	61 min
Apr 15, 6:44 PM CDT	Tornado Warning	MOB	Wayne	61 min
Apr 15, 6:49 PM CDT	Tornado Warning	MOB	Greene, Perry	41 min

Nearby

Tornado Warnings in Mississippi, 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.