Alert archive / Alabama / Tornado Warnings in 2007

Tornado Warning 42, NWS Mobile, AL

October 18, 2007Mobile County, Alabama; George County, Mississippi

NWS Mobile, AL issued this tornado warning at Oct 18, 2007, 6:48 AM CDT for Mobile County, Alabama; George County, Mississippi. It was in force for 42 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: Oct 18, 2007, 6:48 AM CDT (11:48 UTC)
Expired: Oct 18, 2007, 7:30 AM CDT
In force: 42 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Mobile County, AL, George County, MS

The radar

The Mobile radar (KMOB), 19 km from the middle of the area, began a volume at 11:51 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.8 hours before the alert went out and 139 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1054 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KMOB 181148
TORMOB
ALC097-MSC039-181230-
/O.NEW.KMOB.TO.W.0042.071018T1148Z-071018T1230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
648 AM CDT THU OCT 18 2007

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 730 AM CDT

* AT 646 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR TANNER
  WILLIAMS...OR ABOUT 16 MILES SOUTHEAST OF LUCEDALE...MOVING
  NORTHEAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  BIG CREEK LAKE DAM BY 655 AM CDT...
  WILMER...BIG CREEK LAKE AND MOFFET BY 700 AM CDT...
  LOTT AND COLEMAN DAIRY RO AND SEMMES BY 710 AM CDT...
  GEORGETOWN BY 720 AM CDT...
  OAK GROVE BY 725 AM CDT...
  CHUNCHULA AND 6 MILES SOUTHEAST OF GULFCREST BY 730 AM CDT...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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.

LAT...LON 3104 8827 3084 8809 3063 8841 3066 8844
      3071 8844 3072 8844 3072 8855 3075 8858
TIME...MOT...LOC 1148Z 228DEG 24KT 3074 8843

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 18, 3:07 AM CDT	Tornado Warning	MOB	Washington	38 min
Oct 18, 5:44 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	46 min
Oct 17, 9:26 PM CDT	Tornado Warning	MOB	Wayne	49 min
Oct 18, 2:39 AM CDT	Tornado Warning	MOB	Greene	36 min
Oct 18, 2:26 PM CDT	Severe Thunderstorm Warning	MOB	Perry	49 min

Nearby

Tornado Warnings in Alabama, 2007 Tornado Warnings in Mississippi, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.