Alert archive / Alabama / Mesoscale Discussions in 2008

Mesoscale Discussion 2152

August 25, 200831 counties in Alabama; 4 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2008, 4:34 AM CDT for 31 counties in Alabama; 4 counties in Florida. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Aug 25, 2008, 4:34 AM CDT (09:34 UTC)
Expired
Aug 25, 2008, 6:00 AM CDT
In force
86 min
Issued by
the Storm Prediction Center
All 35 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Escambia County, AL, Geneva County, AL, Greene County, AL, Hale County, AL, Henry County, AL, Houston County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 9.6 hours before the alert went out and 155 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2008-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1555 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2008-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1555 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
146 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 24, 7:03 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Clay, Coosa, Fayette, Jefferson and 6 more57 min
Aug 24, 11:38 PM CDTMesoscale DiscussionSPCBaldwin, Conecuh, Escambia, Monroe97 min
Aug 25, 1:10 AM CDTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 14 more6 hr
Aug 25, 7:28 AM CDTTornado WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 41 more13 hr
Aug 25, 10:26 AM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 53 more64 min
Aug 25, 11:56 AM CDTTornado WatchSPCColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more3 hr
Aug 25, 2:07 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 31 more53 min
Aug 25, 6:14 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Coffee, Coosa and 14 more91 min

Nearby

Mesoscale Discussions in Alabama, 2008Mesoscale Discussions in Florida, 2008Every mesoscale discussion in 2008

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.