Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 110, NWS Mobile, AL
NWS Mobile, AL issued this tornado warning at Sep 4, 2011, 12:12 PM CDT for Washington County, Alabama. It was in force for 63 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
- Sep 4, 2011, 12:12 PM CDT (17:12 UTC)
- Expired
- Sep 4, 2011, 1:15 PM CDT
- In force
- 63 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Washington County, AL
The radar
The Mobile radar (KMOB), 69 km from the middle of the area, began a volume at 17:12 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 |
|---|---|---|---|
| Sep 4, 5:05 AM CDT | Tornado Watch | SPC | 11 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.2 hours before the alert went out and 183 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
- 2528 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 473 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 249 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 18.9
The text
As transmitted, in the capitals the NWS used until 2016.
348 WFUS54 KMOB 041712 TORMOB ALC129-041815- /O.NEW.KMOB.TO.W.0110.110904T1712Z-110904T1815Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MOBILE AL 1212 PM CDT SUN SEP 4 2011 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * TORNADO WARNING FOR... CENTRAL WASHINGTON COUNTY IN SOUTHWEST ALABAMA... * UNTIL 115 PM CDT * AT 1207 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES NORTHEAST OF CITRONELLE...OR 7 MILES SOUTHWEST OF SIMS CHAPEL... MOVING NORTH AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... SIMS CHAPEL... TIBBIE... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 MANUFACTURED 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. A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI. && LAT...LON 3140 8833 3140 8803 3114 8815 3114 8824 TIME...MOT...LOC 1712Z 184DEG 15KT 3116 8819 $$
1 follow-up statement
442 WWUS54 KMOB 041750 SVSMOB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1250 PM CDT SUN SEP 4 2011 ALC129-041815- /O.CON.KMOB.TO.W.0110.000000T0000Z-110904T1815Z/ WASHINGTON AL- 1250 PM CDT SUN SEP 4 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR CENTRAL WASHINGTON COUNTY... AT 1249 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED NORTH OF SEABOARD...OR 13 MILES SOUTH OF CHATOM...MOVING NORTH AT 15 MPH. THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI. && LAT...LON 3140 8824 3140 8809 3132 8813 3132 8823 TIME...MOT...LOC 1750Z 184DEG 15KT 3134 8816 $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 7:53 PM CDT | Areal Flood Warning | MOB | Baldwin, Mobile | 6 hr |
| Sep 3, 8:02 PM CDT | Special Marine Warning | MOB | 43 min | |
| Sep 3, 8:24 PM CDT | Special Marine Warning | MOB | 51 min | |
| Sep 3, 9:11 PM CDT | River Flood Warning | MOB | Covington, Escambia | 12 hr |
| Sep 3, 10:34 PM CDT | Special Marine Warning | MOB | 41 min | |
| Sep 3, 11:11 PM CDT | Tornado Warning | MOB | Mobile | 64 min |
| Sep 3, 11:58 PM CDT | Tornado Warning | MOB | Mobile | 62 min |
| Sep 4, 12:13 AM CDT | Special Marine Warning | MOB | 2 hr | |
| Sep 4, 12:59 AM CDT | Tornado Warning | MOB | Mobile | 61 min |
| Sep 4, 1:14 AM CDT | Flash Flood Warning | MOB | Mobile | 3 hr |
| Sep 4, 1:40 AM CDT | Flash Flood Warning | MOB | Mobile | 3 hr |
| Sep 4, 1:59 AM CDT | Tornado Warning | MOB | Mobile | 45 min |
| Sep 4, 2:16 AM CDT | Special Marine Warning | MOB | 119 min | |
| Sep 4, 2:46 AM CDT | Tornado Warning | MOB | Baldwin | 59 min |
| Sep 4, 3:16 AM CDT | Special Marine Warning | MOB | 119 min | |
| Sep 4, 3:57 AM CDT | Tornado Warning | MOB | Baldwin | 42 min |
| Sep 4, 4:49 AM CDT | Special Marine Warning | MOB | 86 min | |
| Sep 4, 5:36 AM CDT | Flash Flood Warning | MOB | Covington, Escambia | 3 hr |
| Sep 4, 5:51 AM CDT | Special Marine Warning | MOB | 114 min | |
| Sep 4, 9:42 AM CDT | Special Marine Warning | MOB | 33 min | |
| Sep 4, 9:59 AM CDT | River Flood Warning | MOB | Choctaw, Clarke, Washington | 4 days |
| Sep 4, 9:59 AM CDT | River Flood Warning | MOB | Choctaw, Clarke, Washington | 5 days |
| Sep 4, 10:43 AM CDT | Special Marine Warning | MOB | 47 min | |
| Sep 4, 10:44 AM CDT | Special Marine Warning | MOB | 46 min | |
| Sep 4, 11:29 AM CDT | Special Marine Warning | MOB | 46 min | |
| Sep 4, 11:46 AM CDT | Tornado Warning | MOB | Baldwin, Mobile | 19 min |
| Sep 4, 12:58 PM CDT | Tornado Warning | MOB | Washington | 62 min |
| Sep 4, 1:20 PM CDT | Tornado Warning | MOB | Clarke, Washington | 55 min |
| Sep 4, 4:01 PM CDT | Tornado Warning | MOB | Choctaw, Clarke | 59 min |
| Sep 4, 4:09 PM CDT | Tornado Warning | MOB | Washington | 36 min |
| Sep 4, 4:15 PM CDT | Tornado Warning | MOB | Baldwin, Escambia | 60 min |
| Sep 4, 4:28 PM CDT | Tornado Warning | MOB | Baldwin | 49 min |
Nearby
Tornado Warnings in Alabama, 2011Every tornado warning in 2011Tornadoes 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.