Alert archive / Mississippi / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 17, NWS Mobile, AL

March 8, 2011Greene County, Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Mar 8, 2011, 7:47 PM CST for Greene County, Perry County, Wayne County, Mississippi. It was in force for 43 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 8, 2011, 7:47 PM CST (01:47 UTC)
Expired: Mar 8, 2011, 8:30 PM CST
In force: 43 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 82 km from the middle of the area, began a volume at 01:50 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.

What was reported inside it

Time	Report	Where	Remark
Mar 8, 7:55 PM CST	HAIL 0.5	Piave, MS	GREENE COUNTY EMERGENCY MANAGER REPORTED MARBLE SIZE HAIL ACROSS NORTHERN PORTIONS OF THE COUNTY.
Mar 8, 8:00 PM CST	HAIL 1	4 Sw Avera, MS	PUBLIC REPORTED QUARTER SIZE HAIL 4 MILES SOUTHWEST OF AVERA NEAR THE INTERSECTION OF TUNG OIL AND NEELY-AVERA ROADS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 8, 7:37 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.8 hours before the alert went out and 144 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: 841 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 473 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 652 m²/s²
0-3 km storm-relative helicity: 774 m²/s²
Significant tornado parameter: 4.0
Supercell composite: 24.8

Open this sounding in Storm Lab

The text

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

950 
WUUS54 KMOB 090147
SVRMOB
MSC041-111-153-090230-
/O.NEW.KMOB.SV.W.0017.110309T0147Z-110309T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
747 PM CST TUE MAR 8 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF LEAKESVILLE...
  EASTERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 830 PM CST

* AT 745 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 9 MILES EAST OF RICHTON TO 12
  MILES SOUTHEAST OF RICHTON TO 15 MILES SOUTH OF RICHTON...AND
  MOVING EAST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MCLAIN AROUND 755 PM CST...
  STATE LINE AND LEAKESVILLE AROUND 830 PM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST WEDNESDAY MORNING
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3119 8894 3154 8883 3156 8846 3108 8844
      3104 8900
TIME...MOT...LOC 0147Z 254DEG 22KT 3137 8877 3121 8882
          3113 8890

$$

PURDY

1 follow-up statement

901 
WWUS54 KMOB 090204
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
804 PM CST TUE MAR 8 2011

MSC041-111-153-090230-
/O.CON.KMOB.SV.W.0017.000000T0000Z-110309T0230Z/
PERRY MS-GREENE MS-WAYNE MS-
804 PM CST TUE MAR 8 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CST
FOR SOUTHEASTERN WAYNE...GREENE AND EAST CENTRAL PERRY COUNTIES...

AT 800 PM CST...NEW AUGUSTA MISSISSIPPI LAW ENFORCEMENT REPORTED 
QUARTER SIZE HAIL WITH THESE STORMS. THESE STORMS WERE ALONG A LINE 
EXTENDING FROM 17 MILES SOUTH OF WAYNESBORO TO 15 MILES WEST OF 
LEAKESVILLE...MOVING EAST AT 30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  NEELY AROUND 805 PM CST...
  OLD AVERA AND KITTRELL AROUND 810 PM CST...
  BUCKATUNNA...CLARK...BRADLEY AND JONATHAN AROUND 815 PM CST...
  BATTLES...KNOBTOWN AND HILLMAN AROUND 820 PM CST...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THESE STORMS HAVE THE POTENTIAL TO CAUSE
SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THESE STORMS.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY ON THE
LOWEST FLOOR OF A STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY
OR A ROOM SUCH AS A CLOSET OR BATHROOM.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY ON THE LOWEST
FLOOR OF A STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A
ROOM SUCH AS A CLOSET OR BATHROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST WEDNESDAY MORNING
FOR SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3123 8879 3154 8874 3156 8846 3108 8844
      3105 8892
TIME...MOT...LOC 0200Z 255DEG 27KT 3144 8865 3126 8869
          3115 8880

$$

PURDY

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 8, 7:01 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry	44 min
Mar 8, 8:23 PM CST	Severe Thunderstorm Warning	MOB	Greene, Wayne	37 min
Mar 8, 9:32 PM CST	River Flood Warning	MOB	George, Greene, Perry	9 days
Mar 8, 9:32 PM CST	River Flood Warning	MOB	George, Greene, Jackson	10 days
Mar 9, 5:01 AM CST	Tornado Warning	MOB	Wayne	44 min
Mar 9, 5:07 AM CST	Flash Flood Warning	MOB	Wayne	6 hr
Mar 9, 5:51 AM CST	Flash Flood Warning	MOB	Greene, Perry, Wayne	6 hr
Mar 9, 6:00 AM CST	Tornado Warning	MOB	Greene, Perry	45 min
Mar 9, 6:04 AM CST	Tornado Warning	MOB	Perry, Stone	41 min
Mar 9, 6:37 AM CST	Tornado Warning	MOB	Greene	17 min
Mar 9, 6:38 AM CST	Tornado Warning	MOB	George, Greene, Perry, Stone	37 min
Mar 9, 6:41 AM CST	Severe Thunderstorm Warning	MOB	George, Stone	49 min
Mar 9, 7:08 AM CST	Severe Thunderstorm Warning	MOB	George, Greene	52 min
Mar 9, 7:26 AM CST	Flash Flood Warning	MOB	George, Greene, Perry, Stone	6 hr
Mar 9, 11:00 AM CST	Areal Flood Warning	MOB	Wayne	5 hr
Mar 9, 11:30 AM CST	River Flood Warning	MOB	Greene, Wayne	47 hr
Mar 9, 11:30 AM CST	River Flood Warning	MOB	Perry	6 days
Mar 9, 12:00 PM CST	Areal Flood Warning	MOB	Greene, Perry, Wayne	4 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 2011 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.