Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 36, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 4, 2011, 7:05 PM CDT for Choctaw County, Clarke County, Washington County, Alabama. It was in force for 55 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
- Apr 4, 2011, 7:05 PM CDT (00:05 UTC)
- Expired
- Apr 4, 2011, 8:00 PM CDT
- In force
- 55 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
Counties Choctaw County, AL, Clarke County, AL, Washington County, AL
The radar
The Mobile radar (KMOB), 159 km from the middle of the area, began a volume at 00:07 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, 7:12 PM CDT | TSTM WND DMG | Butler, AL | CHOCTAW COUNTY SHERIFF REPORTED THAT NUMEROUS TREES DOWN BETWEEN 712 PM AND 810 PM. WIDESPREAD TREES DOWN ACROSS THE COUNTY. TIME ESTIMATED FROM RADAR WHEN THE THREE CELLS MOVED OUT OF THE COUNTY. |
| Apr 4, 8:07 PM CDT | TSTM WND DMG | 1 S Coffeeville, AL | TREES DOWN ON WEST BEND RD. 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
Birmingham, AL (KBMX), launched 00:00Z, 0.1 hours before the alert went out and 170 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
- 862 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1607 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 251 m²/s²
- 0-3 km storm-relative helicity
- 356 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 9.2
The text
As transmitted, in the capitals the NWS used until 2016.
413
WUUS54 KMOB 050005
SVRMOB
ALC023-025-129-050100-
/O.NEW.KMOB.SV.W.0036.110405T0005Z-110405T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
705 PM CDT MON APR 4 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
THIS INCLUDES THE CITY OF BUTLER...
NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...
THIS INCLUDES THE CITY OF THOMASVILLE...
NORTH CENTRAL WASHINGTON COUNTY IN SOUTHWEST ALABAMA...
* UNTIL 800 PM CDT
* AT 702 PM CDT...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 16 MILES EAST OF
MERIDIAN TO 13 MILES SOUTH OF QUITMAN...AND MOVING EAST AT 55
MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
LISMAN AND BUTLER AROUND 715 PM CDT...
MT STERLING AND MOUNT STERLING AROUND 720 PM CDT...
PENNINGTON AND DEAS AROUND 725 PM CDT...
HOLTAMVILLE AROUND 735 PM CDT...
SERVICE AROUND 740 PM CDT...
COFFEEVILLE AROUND 745 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
&&
LAT...LON 3231 8792 3229 8793 3230 8795 3230 8799
3228 8801 3216 8800 3214 8804 3209 8804
3206 8811 3201 8810 3200 8768 3195 8767
3166 8807 3157 8824 3211 8824 3208 8828
3197 8846 3197 8847 3231 8843 3232 8793
TIME...MOT...LOC 0004Z 270DEG 48KT 3233 8841 3199 8844
3185 8871
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 8:30 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 3 more | 60 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, 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.