Alert archive / Alabama / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 7, NWS Mobile, AL

February 13, 2007Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 13, 2007, 6:49 AM CST for Washington County, Alabama. It was in force for 56 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: Feb 13, 2007, 6:49 AM CST (12:49 UTC)
Expired: Feb 13, 2007, 7:45 AM CST
In force: 56 min
Issued by: NWS Mobile, AL
Area: Counties, with a storm outline in the text

County Washington County, AL

The radar

The Mobile radar (KMOB), 76 km from the middle of the area, began a volume at 12:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 13, 2:43 AM CST	Tornado Watch	SPC	10 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.8 hours before the alert went out and 186 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: 514 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 131249
SVRMOB
ALC129-131345-
/O.NEW.KMOB.SV.W.0007.070213T1249Z-070213T1345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
649 AM CST TUE FEB 13 2007

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  WASHINGTON COUNTY IN SOUTHWEST ALABAMA

* UNTIL 745 AM CST

* AT 646 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 6 MILES NORTHWEST OF YELLOW PINE TO 9 MILES
  SOUTHWEST OF DEER PARK...OR ALONG A LINE EXTENDING FROM 15 MILES
  WEST OF CHATOM TO 8 MILES EAST OF LEAKESVILLE...AND MOVING EAST AT
  50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  VINEGAR BEND AND DEER PARK BY 655 AM CST
  TIBBIE BY 700 AM CST
  YARBO AND LOPER BY 705 AM CST
  BIGBEE AND HAWTHORN BY 710 AM CST

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THE PATH...PREPARE FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING.
TAKE COVER IN A STURDY SHELTER UNTIL THESE STORMS HAVE PASSED.

LAT...LON 3136 8811 3135 8810 3120 8806 3119 8828
      3118 8830 3118 8843 3157 8845 3159 8844
      3164 8816

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 13, 7:16 AM CST	Severe Thunderstorm Warning	MOB	Mobile	44 min
Feb 13, 7:53 AM CST	Severe Thunderstorm Warning	MOB	Mobile	67 min
Feb 13, 8:53 AM CST	Severe Thunderstorm Warning	MOB	Baldwin	52 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2007 Every severe thunderstorm warning 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.