Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 97, NWS Mobile, AL
NWS Mobile, AL issued this tornado warning at Sep 4, 2011, 1:59 AM CDT for Mobile County, Alabama. It was in force for 45 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, 1:59 AM CDT (06:59 UTC)
- Expired
- Sep 4, 2011, 2:44 AM CDT
- In force
- 45 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Mobile County, AL
The radar
The Mobile radar (KMOB), 28 km from the middle of the area, began a volume at 07:02 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, 9:43 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 7.0 hours before the alert went out and 151 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
- 1081 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 495 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
524
WFUS54 KMOB 040659
TORMOB
ALC097-040800-
/O.NEW.KMOB.TO.W.0097.110904T0659Z-110904T0800Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
159 AM CDT SUN SEP 4 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
* UNTIL 300 AM CDT
* AT 157 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES
NORTHWEST OF PRICHARD...OR 3 MILES EAST OF SEMMES...MOVING NORTH AT
35 MPH.
* LOCATIONS IMPACTED INCLUDE...
SEMMES... GULFCREST... FOREST HILL...
CITRONELLE... CHUNCHULA...
THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 7.
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.
IF IN MANUFACTURED 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 700 AM CDT SUNDAY MORNING FOR
SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.
&&
LAT...LON 3076 8841 3103 8843 3111 8843 3111 8833
3115 8833 3114 8820 3064 8811 3060 8830
TIME...MOT...LOC 0659Z 164DEG 29KT 3083 8824
$$2 follow-up statements
151
WWUS54 KMOB 040728
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
228 AM CDT SUN SEP 4 2011
ALC097-040800-
/O.CON.KMOB.TO.W.0097.000000T0000Z-110904T0800Z/
MOBILE AL-
228 AM CDT SUN SEP 4 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR
NORTHWESTERN MOBILE COUNTY...
AT 220 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A POSSIBLE TORNADO PRODUCING STORM AND WAS LOCATED NEAR
SEMMES...MOVING NORTH AT 35 MPH. THIS STORM STILL HAS AN ELEVATED
CIRCULATION AND IS BEING MONITORED CLOSELY. THIS STORM WILL CONTINUE
MOVING TOWARDS BOOTHEVILLE AND EARLVILLE.
THE STORM OVER CITRONELLE HAS GREATLY WEAKENED REACHING ITS PEAK
INTENSITY JUST WEST OF PRICHARD DURING THE PAST HALF HOUR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT SUNDAY MORNING FOR
SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.
&&
LAT...LON 3080 8838 3103 8843 3111 8843 3111 8833
3114 8833 3114 8820 3081 8814 3078 8831
TIME...MOT...LOC 0724Z 174DEG 32KT 3085 8831
$$585
WWUS54 KMOB 040744
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
244 AM CDT SUN SEP 4 2011
ALC097-040754-
/O.CAN.KMOB.TO.W.0097.000000T0000Z-110904T0800Z/
MOBILE AL-
244 AM CDT SUN SEP 4 2011
...THE TORNADO WARNING FOR NORTHWESTERN MOBILE COUNTY IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT SUNDAY MORNING FOR
SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.
LAT...LON 3080 8838 3103 8843 3111 8843 3111 8833
3114 8833 3114 8820 3081 8814 3078 8831
TIME...MOT...LOC 0744Z 174DEG 32KT 3103 8833
$$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, 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, 12:12 PM CDT | Tornado Warning | MOB | Washington | 63 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.