Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 32, NWS Mobile, AL

April 15, 2011Greene County, Perry County, Mississippi

NWS Mobile, AL issued this tornado warning at Apr 15, 2011, 10:34 AM CDT for Greene County, Perry County, Mississippi. It was in force for 41 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, 10:34 AM CDT (15:34 UTC)
Expired: Apr 15, 2011, 11:15 AM CDT
In force: 41 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Greene County, MS, Perry County, MS

The radar

The Mobile radar (KMOB), 80 km from the middle of the area, began a volume at 15:37 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, 7:32 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.6 hours before the alert went out and 145 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.

374 
WFUS54 KMOB 151534
TORMOB
MSC041-111-151615-
/O.NEW.KMOB.TO.W.0032.110415T1534Z-110415T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1034 AM 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 1115 AM CDT

* AT 1033 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 17 MILES SOUTH
  OF RICHTON...OR NEAR BEAUMONT...MOVING NORTHEAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  BEAUMONT AND MCLAIN AROUND 1040 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 300 PM CDT FRIDAY AFTERNOON
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3144 8879 3141 8854 3118 8844 3099 8885
      3111 8903
TIME...MOT...LOC 1534Z 215DEG 27KT 3111 8890

$$

1 follow-up statement

444 
WWUS54 KMOB 151553
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1053 AM CDT FRI APR 15 2011

MSC111-151602-
/O.CAN.KMOB.TO.W.0032.000000T0000Z-110415T1615Z/
PERRY MS-
1053 AM CDT FRI APR 15 2011

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT FRIDAY AFTERNOON 
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8879 3141 8854 3118 8844 3108 8881
      3122 8883 3133 8883
TIME...MOT...LOC 1552Z 215DEG 27KT 3122 8881

$$

MSC041-151615-
/O.CON.KMOB.TO.W.0032.000000T0000Z-110415T1615Z/
GREENE MS-
1053 AM CDT FRI APR 15 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT FOR GREENE
COUNTY...

AT 1051 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS NEAR BYRD...OR ABOUT 12 MILES SOUTHEAST OF RICHTON...
MOVING NORTHEAST AT 30 MPH.

THE TORNADO WILL BE NEAR...
  AVERA AND JONATHAN AROUND 1105 AM CDT...
  BOTHWELL AND SAND HILL AROUND 1110 AM CDT...
  PIAVE...OLD AVERA AND CLARK AROUND 1115 AM CDT...

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.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CDT FRIDAY AFTERNOON
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8879 3141 8854 3118 8844 3108 8881
      3122 8883 3133 8883
TIME...MOT...LOC 1552Z 215DEG 27KT 3122 8881

$$

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, 10:56 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, 6:38 PM CDT	Tornado Warning	MOB	Greene, Perry	37 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.