Alert archive / Alabama / Mesoscale Discussions in 2008

Mesoscale Discussion 938

May 15, 200814 counties in Alabama; 10 counties in Florida; 5 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 15, 2008, 12:28 PM CDT for 14 counties in Alabama; 10 counties in Florida; 5 counties in Mississippi. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
May 15, 2008, 12:28 PM CDT (17:28 UTC)
Expired
May 15, 2008, 2:00 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 29 counties

Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Eglin Afb radar (KEVX), 107 km from the middle of the area, began a volume at 17:27 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

Birmingham, AL (KBMX), launched 12:00Z, 5.5 hours before the alert went out and 261 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 12:00Z on 2008-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 203 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2008-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
203 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
44 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
May 15, 7:41 AM CDTMesoscale DiscussionSPCBaldwin, Choctaw, Clarke, Escambia, Marengo, Mobile and 4 more94 min
May 15, 8:42 AM CDTMesoscale DiscussionSPCBaldwin, Choctaw, Clarke, Escambia, Marengo, Mobile and 4 more63 min
May 15, 8:58 AM CDTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more6 hr
May 15, 2:11 AM CDTMesoscale DiscussionSPCAdams, Wilkinson94 min
May 15, 4:16 AM CDTTornado WatchSPCAdams, Amite, Attala, Bolivar, Carroll, Choctaw and 29 more7 hr
May 15, 5:54 AM CDTMesoscale DiscussionSPCAdams, Amite, Attala, Carroll, Claiborne, Copiah and 26 more96 min

Nearby

Mesoscale Discussions in Alabama, 2008Mesoscale Discussions in Florida, 2008Mesoscale Discussions in Mississippi, 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; radar from the NEXRAD Level II archive.