Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 1, NWS Mobile, AL

March 5, 2011Greene County, Perry County, Mississippi

NWS Mobile, AL issued this tornado warning at Mar 5, 2011, 10:04 AM CST 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: Mar 5, 2011, 10:04 AM CST (16:04 UTC)
Expired: Mar 5, 2011, 10:45 AM CST
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), 71 km from the middle of the area, began a volume at 16:05 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
Mar 5, 8:54 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.1 hours before the alert went out and 117 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: 960 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

007 
WFUS54 KMOB 051604
TORMOB
MSC041-111-051645-
/O.NEW.KMOB.TO.W.0001.110305T1604Z-110305T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1004 AM CST SAT MAR 5 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 1045 AM CST

* AT 1001 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 16 MILES
  NORTHEAST OF WIGGINS...OR 9 MILES WEST OF AVENT STATION...MOVING
  NORTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  AVENT STATION AROUND 1025 AM CST...
  MCLAIN AROUND 1030 AM CST...

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.

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

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.

&&

LAT...LON 3099 8904 3119 8884 3104 8867 3100 8877
      3100 8882 3098 8882 3093 8894
TIME...MOT...LOC 1604Z 226DEG 16KT 3100 8891

$$

1 follow-up statement

901 
WWUS54 KMOB 051617
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1017 AM CST SAT MAR 5 2011

MSC041-111-051645-
/O.CON.KMOB.TO.W.0001.000000T0000Z-110305T1645Z/
PERRY MS-GREENE MS-
1017 AM CST SAT MAR 5 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 AM CST FOR
SOUTHWESTERN GREENE AND SOUTHERN PERRY COUNTIES...

AT 1015 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS NEAR PROGRESS...OR ABOUT 20 MILES NORTHWEST OF
LUCEDALE...MOVING NORTHEAST AT 15 MPH.

THE TORNADO WILL BE NEAR...
  ROYCE AROUND 1025 AM CST...
  LITTLE CREEK AND MCLAIN AROUND 1030 AM CST...

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. 

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.

LAT...LON 3113 8890 3114 8890 3119 8884 3106 8873
      3100 8877 3100 8882 3098 8882 3096 8897
      3101 8902
TIME...MOT...LOC 1617Z 207DEG 14KT 3107 8887

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 5, 9:15 AM CST	Severe Thunderstorm Warning	MOB	George, Perry, Stone	26 min
Mar 5, 9:26 AM CST	Areal Flood Advisory	MOB	Stone	2 hr
Mar 5, 10:42 AM CST	Flash Flood Warning	MOB	Perry	2 hr
Mar 5, 10:46 AM CST	Tornado Warning	MOB	Greene	44 min
Mar 5, 11:26 AM CST	Areal Flood Advisory	MOB	Greene	2 hr
Mar 5, 11:54 AM CST	Severe Thunderstorm Warning	MOB	Greene	50 min
Mar 5, 11:58 AM CST	Areal Flood Advisory	MOB	Greene	2 hr
Mar 5, 12:50 PM CST	Flash Flood Warning	MOB	Greene, Perry	3 hr
Mar 5, 1:16 PM CST	Flash Flood Watch	MOB	George, Greene, Perry, Stone, Wayne	6 hr
Mar 5, 1:39 PM CST	Areal Flood Advisory	MOB	Greene, Perry, Wayne	2 hr
Mar 5, 2:50 PM CST	Flash Flood Warning	MOB	Stone	4 hr
Mar 5, 3:23 PM CST	Flash Flood Warning	MOB	Greene, Perry, Wayne	3 hr
Mar 5, 3:48 PM CST	Flash Flood Warning	MOB	Greene, Perry	3 hr
Mar 5, 4:17 PM CST	Areal Flood Advisory	MOB	George	118 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.