Alert archive / Alabama / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 65, NWS Mobile, AL

May 11, 2007Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 11, 2007, 6:41 PM CDT for Choctaw County, Alabama. It was in force for 17 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: May 11, 2007, 6:41 PM CDT (23:41 UTC)
Expired: May 11, 2007, 6:58 PM CDT
In force: 17 min
Issued by: NWS Mobile, AL
Area: Counties, with a storm outline in the text

County Choctaw County, AL

The radar

The Mobile radar (KMOB), 131 km from the middle of the area, began a volume at 23:42 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

Jackson, MS (KJAN), launched 12:00Z, 11.7 hours before the alert went out and 171 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: 200 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 112342
SVRMOB
ALC023-120015-
/O.NEW.KMOB.SV.W.0065.070511T2341Z-070512T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
641 PM CDT FRI MAY 11 2007

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 715 PM CDT

* AT 638 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND   
  DAMAGING WINDS TO NEAR 60 MPH.  THIS STORM WAS LOCATED NEAR        
  PARAGON...OR ABOUT 19 MILES SOUTHWEST OF BUTLER...AND MOVING       
  SOUTHWEST AT 8 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WATER VALLEY THROUGH 655 PM CDT...
  ISNEY BY 710 PM CDT...
  
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 3195 8827 3198 8846 3170 8848 3170 8825

$$

1 follow-up statement

000 
WWUS54 KMOB 112358
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
657 PM CDT FRI MAY 11 2007

ALC023-120007-
/O.CAN.KMOB.SV.W.0065.000000T0000Z-070512T0015Z/
CHOCTAW AL-
657 PM CDT FRI MAY 11 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHOCTAW COUNTY IS
CANCELLED...

THE STORMS OVER SOUTHWESTERN CHOCTAW COUNTY HAVE WEAKENED BELOW 
SEVERE LIMITS.  THESE STORMS MAY STILL PRODUCE GUSTY WINDS AROUND 35 
MPH...AND ARE NEARLY STATIONARY.  

LAT...LON 3195 8827 3198 8846 3170 8848 3170 8825

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 2:00 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	30 min
May 11, 2:32 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	43 min
May 11, 3:13 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	47 min
May 11, 4:01 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	44 min
May 11, 4:39 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh	51 min
May 11, 4:44 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	46 min
May 11, 5:07 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	23 min
May 11, 5:16 PM CDT	Severe Thunderstorm Warning	MOB	Washington	44 min
May 11, 5:24 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	36 min
May 11, 6:39 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	36 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.