Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 38, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 4, 2011, 8:30 PM CDT for 9 counties in Alabama; George County, Greene County, Mississippi. It was in force for 60 min. 8 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
- Apr 4, 2011, 8:30 PM CDT (01:30 UTC)
- Expired
- Apr 4, 2011, 9:30 PM CDT
- In force
- 60 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
Counties Baldwin County, AL, Butler County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, George County, MS, Greene County, MS
The radar
The Mobile radar (KMOB), 39 km from the middle of the area, began a volume at 01:31 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 |
|---|---|---|---|
| Apr 4, 8:30 PM CDT | TSTM WND DMG | 2 Wsw Basin, MS | GEORGE COUNTY SHERIFF REPORTED TREES DOWN ALONG DEER LANE IN PLUM BLUFF ESTATES. ALSO NUMEROUS POWER OUTAGES IN THE AREA. |
| Apr 4, 8:35 PM CDT | TSTM WND DMG | 10 S Thomasville, AL | EMA REPORTS NEAR THE COMMUNITY OF LIBERTY...HALFWAY BETWEEN THOMASVILLE AND GROVE HILL...A TREE HAS FALLEN ACROSS OLD HWY 5. TIME ESTIMATED FROM RADAR. |
| Apr 4, 8:40 PM CDT | TSTM WND DMG | Grove Hill, AL | TREE DOWN ON HWY 43 IN GROVE HILL NEAR CHILTON RD. TIME ESTIMATED FROM RADAR. |
| Apr 4, 8:45 PM CDT | TSTM WND DMG | 4 Ene Mobile Airport, AL | LARGE TREE LIMBS AND BRANCHES DOWN. TREE DOWN ON UNIVERSITY SOUTH ALABAMA CAMPUS IN FRONT OF ADMIN BLDG. |
| Apr 4, 8:48 PM CDT | TSTM WND DMG | 5 Se Grove Hill, AL | EMA REPORTED TREE DOWN. TIME ESTIMATED FROM RADAR. |
| Apr 4, 8:48 PM CDT | TSTM WND DMG | Whately, AL | EMA REPORTS SEVERAL TREES DOWN NEAR WHATLEY. TIME ESTIMATED FROM RADAR. |
| Apr 4, 8:50 PM CDT | TSTM WND DMG | Jackson, AL | TREES DOWN IN THE JACKSON AREA ON DEPOT RD NEAR ELMS ST. |
| Apr 4, 9:20 PM CDT | TSTM WND DMG | 5 Sw Downtown Mobile, AL | MOPD REPORTS TREE DOWN ON HALLS MILL RD AND MCVAY DR...BLOCKING TRAFFIC. TIME ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Apr 4, 5:28 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 1.5 hours before the alert went out and 186 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.
- Mixed-layer CAPE
- 3275 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 4.7
- Supercell composite
- 20.4
The text
As transmitted, in the capitals the NWS used until 2016.
808
WUUS54 KMOB 050130
SVRMOB
ALC003-013-025-035-053-097-099-129-131-MSC039-041-050230-
/O.NEW.KMOB.SV.W.0038.110405T0130Z-110405T0230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
830 PM CDT MON APR 4 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN BUTLER COUNTY IN SOUTH CENTRAL ALABAMA...
WESTERN CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
WESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
EASTERN GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
SOUTHEASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
NORTHWESTERN BALDWIN COUNTY IN SOUTHWEST ALABAMA...
CLARKE COUNTY IN SOUTHWEST ALABAMA...
MOBILE COUNTY IN SOUTHWEST ALABAMA...
SOUTHEASTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...
* UNTIL 930 PM CDT
* AT 826 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 20 MILES WEST OF
SELMONT TO 14 MILES SOUTH OF BAY ST. LOUIS...AND MOVING EAST AT 55
MPH.
THIS INCLUDES INTERSTATE 10 IN ALABAMA BETWEEN MILE MARKERS 1 AND 45.
THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 81.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
&&
LAT...LON 3073 8842 3074 8880 3228 8744 3206 8716
3197 8657 3197 8656 3100 8743 3100 8760
3044 8792 3045 8792 3067 8802 3065 8805
3031 8814 3031 8821 3022 8811 3038 8839
3021 8837 3021 8838
TIME...MOT...LOC 0128Z 269DEG 46KT 3231 8731 3012 8922
$$2 follow-up statements
422
WWUS54 KMOB 050140
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
840 PM CDT MON APR 4 2011
ALC003-013-025-035-053-097-099-129-131-MSC039-041-050230-
/O.CON.KMOB.SV.W.0038.000000T0000Z-110405T0230Z/
ESCAMBIA AL-WASHINGTON AL-CONECUH AL-MONROE AL-BUTLER AL-CLARKE AL-
WILCOX AL-GEORGE MS-GREENE MS-BALDWIN AL-MOBILE AL-
840 PM CDT MON APR 4 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR MOBILE...NORTHWESTERN BALDWIN...SOUTHEASTERN GREENE...EASTERN
GEORGE...WILCOX...CLARKE...NORTHWESTERN BUTLER...MONROE...WESTERN
CONECUH...SOUTHEASTERN WASHINGTON AND WESTERN ESCAMBIA COUNTIES...
AT 837 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE ALONG A LINE
EXTENDING FROM 13 MILES NORTHEAST OF REHOBOTH TO 51 MILES SOUTHWEST
OF CLOVERDALE...OR ALONG A LINE EXTENDING FROM 12 MILES WEST OF
SELMONT-WEST SELMONT TO 16 MILES SOUTH OF LONG BEACH...MOVING EAST
AT 55 MPH.
THE STRONGEST STORM IN THIS LINE OF STORMS WAS NEAR DWIGHT...OR
ABOUT NEAR CITRONELLE...MOVING NORTHEAST AT 55 MPH. THIS STORM IS
CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DESTRUCTIVE WINDS
OVER 70 MPH.
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 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
LAT...LON 3073 8842 3074 8880 3228 8744 3206 8716
3197 8657 3197 8656 3100 8743 3100 8760
3044 8792 3045 8792 3067 8802 3065 8805
3031 8814 3031 8821 3022 8811 3038 8839
3021 8837 3021 8838
TIME...MOT...LOC 0139Z 269DEG 46KT 3232 8714 3013 8906
$$736
WWUS54 KMOB 050156
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
856 PM CDT MON APR 4 2011
MSC041-050205-
/O.CAN.KMOB.SV.W.0038.000000T0000Z-110405T0230Z/
GREENE MS-
856 PM CDT MON APR 4 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREENE COUNTY IS
CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
LAT...LON 3073 8842 3073 8856 3213 8726 3206 8716
3197 8657 3197 8656 3100 8743 3100 8760
3044 8792 3045 8792 3067 8802 3065 8805
3031 8814 3031 8821 3022 8811 3038 8839
3021 8837 3021 8838
TIME...MOT...LOC 0155Z 269DEG 46KT 3232 8690 3014 8882
$$
ALC003-013-025-035-053-097-099-129-131-MSC039-050230-
/O.CON.KMOB.SV.W.0038.000000T0000Z-110405T0230Z/
ESCAMBIA AL-WASHINGTON AL-CONECUH AL-MONROE AL-BUTLER AL-CLARKE AL-
WILCOX AL-GEORGE MS-BALDWIN AL-MOBILE AL-
856 PM CDT MON APR 4 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR MOBILE...NORTHWESTERN BALDWIN...SOUTHEASTERN GEORGE...EASTERN
WILCOX...SOUTHEASTERN CLARKE...NORTHWESTERN BUTLER...MONROE...WESTERN
CONECUH...SOUTHEASTERN WASHINGTON AND WESTERN ESCAMBIA COUNTIES...
AT 854 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DESTRUCTIVE WINDS OVER 70 MPH. THESE STORMS WERE ALONG A
LINE EXTENDING FROM 22 MILES NORTH OF FURMAN TO 37 MILES SOUTHWEST
OF CLOVERDALE...OR ALONG A LINE EXTENDING FROM 7 MILES SOUTHEAST OF
SELMONT-WEST SELMONT TO 19 MILES SOUTH OF OCEAN SPRINGS...MOVING
EAST AT 55 MPH.
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THESE STORMS.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY ON THE
LOWEST FLOOR OF A STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY
OR A ROOM SUCH AS A CLOSET OR BATHROOM.
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY ON THE LOWEST
FLOOR OF A STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A
ROOM SUCH AS A CLOSET OR BATHROOM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
LAT...LON 3073 8842 3073 8856 3213 8726 3206 8716
3197 8657 3197 8656 3100 8743 3100 8760
3044 8792 3045 8792 3067 8802 3065 8805
3031 8814 3031 8821 3022 8811 3038 8839
3021 8837 3021 8838
TIME...MOT...LOC 0155Z 269DEG 46KT 3232 8690 3014 8882
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 7:05 PM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Washington | 55 min |
| Apr 4, 7:08 PM CDT | Tornado Warning | MOB | Choctaw, Clarke, Washington | 67 min |
| Apr 4, 7:30 PM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Mobile, Washington, Wilcox | 60 min |
| Apr 4, 7:38 PM CDT | Tornado Warning | MOB | Washington | 56 min |
| Apr 4, 7:54 PM CDT | Tornado Warning | MOB | Choctaw, Clarke, Washington | 53 min |
| Apr 4, 8:21 PM CDT | Tornado Warning | MOB | Clarke, Monroe, Washington | 39 min |
| Apr 4, 9:41 PM CDT | Severe Thunderstorm Warning | MOB | Butler, Conecuh, Covington, Crenshaw, Escambia | 64 min |
| Apr 4, 9:44 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Covington, Escambia | 61 min |
| Apr 4, 9:47 PM CDT | Special Marine Warning | MOB | 88 min | |
| Apr 4, 10:46 PM CDT | Severe Thunderstorm Warning | MOB | Covington | 44 min |
| Apr 4, 11:36 PM CDT | Special Marine Warning | MOB | 84 min | |
| Apr 5, 5:09 AM CDT | Fire Weather Watch | MOB | Butler, Conecuh, Covington, Crenshaw, Escambia, Monroe and 1 more | 25 hr |
Nearby
Severe Thunderstorm Warnings in Alabama, 2011Severe Thunderstorm Warnings in Mississippi, 2011Every 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.