Alert archive / Mississippi / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 18, NWS Mobile, AL

March 8, 2011Greene County, Wayne County, Mississippi; Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 8, 2011, 8:23 PM CST for Greene County, Wayne County, Mississippi; Washington County, Alabama. 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: Mar 8, 2011, 8:23 PM CST (02:23 UTC)
Expired: Mar 8, 2011, 9:00 PM CST
In force: 37 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

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

The radar

The Mobile radar (KMOB), 73 km from the middle of the area, began a volume at 02:23 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 8, 7:37 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 2.4 hours before the alert went out and 182 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.

050 
WUUS54 KMOB 090223
SVRMOB
ALC129-MSC041-153-090300-
/O.NEW.KMOB.SV.W.0018.110309T0223Z-110309T0300Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF LEAKESVILLE...
  SOUTHEASTERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  WASHINGTON COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF CHATOM...

* UNTIL 900 PM CST

* AT 822 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 10 MILES WEST OF CHATOM TO 
  LEAKESVILLE...AND MOVING EAST AT 35 MPH.  THE GREENE COUNTY
  MISSISSIPPI EMERGENCY MANAGER RECEIVED A REPORT OF QUARTER SIZE
  HAIL WITH THIS STORM 4 MILES SOUTHWEST OF AVERA MISSISSIPPI. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CHATOM AROUND 840 PM CST...
  SAINT STEPHRNS AND SAINT STEPHENS AROUND 855 PM CST...
  CORTELUOU AND MCINTOSH AROUND 900 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 3132 8858 3155 8854 3163 8808 3159 8807
      3158 8801 3157 8804 3155 8800 3134 8795
      3117 8803 3115 8817 3115 8833 3112 8834
      3112 8843 3111 8846 3107 8871
TIME...MOT...LOC 0221Z 257DEG 32KT 3149 8842 3134 8844
          3120 8859

$$

PURDY

1 follow-up statement

422 
WWUS54 KMOB 090247
SVSMOB

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

MSC041-153-090256-
/O.CAN.KMOB.SV.W.0018.000000T0000Z-110309T0300Z/
GREENE MS-WAYNE MS-
847 PM CST TUE MAR 8 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WAYNE AND EASTERN
GREENE COUNTIES IS CANCELLED...

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

LAT...LON 3160 8808 3159 8806 3158 8803 3157 8804
      3154 8800 3135 8795 3126 8844 3129 8844
      3157 8840 3161 8822 3163 8808
TIME...MOT...LOC 0246Z 235DEG 31KT 3157 8828 3142 8831
          3128 8846

$$

ALC129-090300-
/O.CON.KMOB.SV.W.0018.000000T0000Z-110309T0300Z/
WASHINGTON AL-
847 PM CST TUE MAR 8 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CST
FOR CENTRAL WASHINGTON COUNTY...

AT 845 PM CST...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS 
OVER 60 MPH.  THESE STORMS WERE ALONG A LINE EXTENDING FROM 7 MILES 
NORTHWEST OF CHATOM TO 8 MILES NORTHEAST OF LEAKESVILLE...MOVING 
NORTHEAST AT 35 MPH. THE GREENE COUNTY MISSISSIPPI EMERGENCY MANAGER 
RECEIVED A REPORT OF QUARTER SIZE HAIL WITH THIS STORM.

SEVERE THUNDERSTORMS WILL BE NEAR...
  FOUR POINT...ELLISVILLE...CARPENTER AND CHATOM AROUND 855 PM CST...
  RUTAN...TIBBIE AND SEABOARD AROUND 900 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.

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

LAT...LON 3160 8808 3159 8806 3158 8803 3157 8804
      3154 8800 3135 8795 3126 8844 3129 8844
      3157 8840 3161 8822 3163 8808
TIME...MOT...LOC 0246Z 235DEG 31KT 3157 8828 3142 8831
          3128 8846

$$

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, 7:47 PM CST	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	43 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
Mar 8, 7:11 PM CST	Severe Thunderstorm Warning	MOB	Mobile, Washington	34 min
Mar 8, 9:04 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Washington	41 min
Mar 8, 9:44 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Washington, Wilcox	46 min
Mar 9, 1:32 AM CST	Flash Flood Warning	MOB	Choctaw	118 min
Mar 9, 4:20 AM CST	Flash Flood Warning	MOB	Choctaw	6 hr
Mar 9, 4:22 AM CST	Severe Thunderstorm Warning	MOB	Choctaw	38 min
Mar 9, 4:32 AM CST	Tornado Warning	MOB	Choctaw	33 min
Mar 9, 5:40 AM CST	Tornado Warning	MOB	Choctaw, Clarke	33 min
Mar 9, 7:33 AM CST	Flash Flood Warning	MOB	Monroe	6 hr
Mar 9, 7:52 AM CST	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	83 min
Mar 9, 7:54 AM CST	Special Marine Warning	MOB		81 min
Mar 9, 8:01 AM CST	Tornado Warning	MOB	Baldwin, Mobile	44 min
Mar 9, 8:14 AM CST	Severe Thunderstorm Warning	MOB	Conecuh, Covington, Escambia	61 min
Mar 9, 8:27 AM CST	Tornado Warning	MOB	Baldwin, Mobile	63 min
Mar 9, 8:35 AM CST	Tornado Warning	MOB	Conecuh, Covington, Escambia	40 min
Mar 9, 8:41 AM CST	Flash Flood Warning	MOB	Baldwin, Mobile	4 hr
Mar 9, 8:48 AM CST	Flash Flood Warning	MOB	Conecuh, Escambia	5 hr
Mar 9, 8:50 AM CST	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw	40 min
Mar 9, 9:02 AM CST	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	58 min
Mar 9, 9:10 AM CST	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	65 min
Mar 9, 9:10 AM CST	Tornado Warning	MOB	Baldwin	50 min
Mar 9, 9:16 AM CST	Tornado Warning	MOB	Baldwin	44 min
Mar 9, 9:16 AM CST	Tornado Warning	MOB	Covington	59 min
Mar 9, 9:19 AM CST	Special Marine Warning	MOB		116 min
Mar 9, 9:23 AM CST	Special Marine Warning	MOB		97 min
Mar 9, 9:25 AM CST	Flash Flood Warning	MOB	Baldwin	6 hr
Mar 9, 9:26 AM CST	Tornado Warning	MOB	Baldwin, Escambia	49 min
Mar 9, 9:26 AM CST	Tornado Warning	MOB	Covington, Crenshaw	26 min
Mar 9, 9:36 AM CST	Flash Flood Warning	MOB	Conecuh, Covington, Escambia	114 min
Mar 9, 9:40 AM CST	Tornado Warning	MOB	Baldwin	50 min
Mar 9, 9:44 AM CST	Areal Flood Advisory	MOB	Butler, Conecuh, Covington, Crenshaw	4 hr
Mar 9, 9:54 AM CST	Tornado Warning	MOB	Covington	25 min
Mar 9, 10:09 AM CST	Severe Thunderstorm Warning	MOB	Covington	66 min
Mar 9, 10:22 AM CST	Areal Flood Warning	MOB	Choctaw	5 hr
Mar 9, 10:55 AM CST	Special Marine Warning	MOB		80 min
Mar 9, 11:14 AM CST	Tornado Warning	MOB	Baldwin	61 min
Mar 9, 11:30 AM CST	River Flood Warning	MOB	Clarke, Monroe, Wilcox	10 days
Mar 9, 11:54 AM CST	Areal Flood Advisory	MOB	Conecuh, Covington, Escambia	111 min
Mar 9, 11:58 AM CST	Special Marine Warning	MOB		2 hr
Mar 9, 2:02 PM CST	Special Marine Warning	MOB		58 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2011 Severe Thunderstorm Warnings in Alabama, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.