Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 90, NWS Mobile, AL
NWS Mobile, AL issued this tornado warning at Sep 3, 2011, 12:53 PM CDT for Mobile County, Alabama. It was in force for 22 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 3, 2011, 12:53 PM CDT (17:53 UTC)
- Expired
- Sep 3, 2011, 1:15 PM CDT
- In force
- 22 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Mobile County, AL
The radar
The Mobile radar (KMOB), 48 km from the middle of the area, began a volume at 17:57 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 3, 9:41 AM CDT | Tornado Watch | SPC | 12 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.9 hours before the alert went out and 146 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
- 850 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 477 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 286 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.0
The text
As transmitted, in the capitals the NWS used until 2016.
535
WFUS54 KMOB 031753
TORMOB
ALC097-031815-
/O.NEW.KMOB.TO.W.0090.110903T1753Z-110903T1815Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1253 PM CDT SAT SEP 3 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* TORNADO WARNING FOR...
EXTREME SOUTH CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...
* UNTIL 115 PM CDT
* AT 1253 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES
SOUTHEAST OF DAUPHIN ISLAND...OR 5 MILES SOUTH OF SAND ISLAND...
MOVING NORTH AT 30 MPH.
* LOCATIONS IMPACTED INCLUDE...
RURAL EXTREME SOUTH CENTRAL MOBILE COUNTY
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 1000 PM CDT SATURDAY EVENING
FOR SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
&&
LAT...LON 3024 8827 3027 8813 3029 8813 3029 8812
3023 8810 3024 8817 3023 8825
TIME...MOT...LOC 1753Z 163DEG 26KT 3019 8813
$$1 follow-up statement
033
WWUS54 KMOB 031807
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
107 PM CDT SAT SEP 3 2011
ALC097-031818-
/O.EXP.KMOB.TO.W.0090.000000T0000Z-110903T1815Z/
MOBILE AL-
107 PM CDT SAT SEP 3 2011
...THE TORNADO WARNING FOR EXTREME SOUTH CENTRAL MOBILE COUNTY WILL
EXPIRE AT 115 PM CDT...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SATURDAY EVENING
FOR SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.
LAT...LON 3024 8827 3027 8813 3029 8813 3029 8812
3023 8810 3024 8817 3023 8825
TIME...MOT...LOC 1808Z 163DEG 26KT 3029 8817
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 10:37 PM CDT | Tropical Storm Warning | MOB | 47 hr | |
| Sep 3, 1:44 AM CDT | Special Marine Warning | MOB | 46 min | |
| Sep 3, 2:13 AM CDT | Special Marine Warning | MOB | 47 min | |
| Sep 3, 3:38 AM CDT | Special Marine Warning | MOB | 22 min | |
| Sep 3, 4:00 AM CDT | Special Marine Warning | MOB | 30 min | |
| Sep 3, 4:31 AM CDT | Special Marine Warning | MOB | 44 min | |
| Sep 3, 9:15 AM CDT | River Flood Warning | MOB | Baldwin | 24 hr |
| Sep 3, 9:16 AM CDT | River Flood Warning | MOB | Baldwin | 24 hr |
| Sep 3, 9:19 AM CDT | River Flood Warning | MOB | Baldwin | 24 hr |
| Sep 3, 10:59 AM CDT | Special Marine Warning | MOB | 46 min | |
| Sep 3, 12:14 PM CDT | Special Marine Warning | MOB | 46 min | |
| Sep 3, 1:00 PM CDT | Special Marine Warning | MOB | 21 min | |
| Sep 3, 1:29 PM CDT | Special Marine Warning | MOB | 61 min | |
| Sep 3, 1:50 PM CDT | River Flood Warning | MOB | Mobile | 31 hr |
| Sep 3, 2:00 PM CDT | Tornado Warning | MOB | Mobile | 16 min |
| Sep 3, 2:14 PM CDT | Tornado Warning | MOB | Mobile | 33 min |
| Sep 3, 2:19 PM CDT | Flash Flood Warning | MOB | Mobile | 4 hr |
| Sep 3, 4:10 PM CDT | Special Marine Warning | MOB | 15 min | |
| Sep 3, 4:53 PM CDT | Flash Flood Warning | MOB | Mobile | 3 hr |
| Sep 3, 5:00 PM CDT | Special Marine Warning | MOB | 45 min | |
| Sep 3, 5:33 PM CDT | Special Marine Warning | MOB | 42 min | |
| Sep 3, 6:06 PM CDT | Special Marine Warning | MOB | 39 min | |
| Sep 3, 6:09 PM CDT | Tornado Warning | MOB | Mobile | 51 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.