Alert archive / Alabama / Mesoscale Discussions in 2010

Mesoscale Discussion 37

January 21, 201031 counties in Alabama; 15 counties in Florida; 10 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 21, 2010, 5:44 AM CST for 31 counties in Alabama; 15 counties in Florida; 10 counties in Georgia. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Jan 21, 2010, 5:44 AM CST (11:44 UTC)
Expired
Jan 21, 2010, 6:45 AM CST
In force
61 min
Issued by
the Storm Prediction Center
All 56 counties

Autauga County, AL, Baldwin County, AL, Bibb 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, Pickens County, AL, Pike County, AL, Sumter County, AL, Tuscaloosa County, AL, Washington County, AL, Wilcox County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA

The watches that followed

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

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 00:00Z, 11.7 hours before the alert went out and 93 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, Eglin AFB/Valpar, FL at 00:00Z on 2010-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Eglin AFB/Valpar, FL at 00:00Z on 2010-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
626 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
244 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
Jan 20, 8:59 PM CSTMesoscale DiscussionSPCChoctaw, Mobile, Washington91 min
Jan 20, 10:18 PM CSTMesoscale DiscussionSPCCoffee, Covington, Escambia, Geneva, Houston87 min
Jan 21, 1:31 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Butler, Choctaw, Clarke and 22 more29 min
Jan 21, 2:09 AM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 25 more7 hr
Jan 21, 7:57 AM CSTMesoscale DiscussionSPCGeneva, Houston33 min
Jan 21, 9:55 AM CSTMesoscale DiscussionSPCColbert, Lauderdale65 min
Jan 21, 12:01 PM CSTTornado WatchSPCColbert, Franklin, Lauderdale3 hr
Jan 21, 5:14 PM CSTMesoscale DiscussionSPCJackson, Madison91 min
Jan 21, 7:12 AM CSTMesoscale DiscussionSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 8 more33 min
Jan 21, 7:25 AM CSTTornado WatchSPCAlachua, Baker, Bay, Bradford, Calhoun, Clay and 22 more10 hr
Jan 21, 10:35 AM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 11 more55 min
Jan 21, 1:09 PM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 10 more66 min

Nearby

Mesoscale Discussions in Alabama, 2010Mesoscale Discussions in Florida, 2010Mesoscale Discussions in Georgia, 2010Every mesoscale discussion in 2010

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.