Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 235

March 1, 200713 counties in Alabama; 8 counties in Florida; 25 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 1, 2007, 8:58 AM CST for 13 counties in Alabama; 8 counties in Florida; 25 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 1, 2007, 8:58 AM CST (14:58 UTC)
Expired
Mar 1, 2007, 11:00 AM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 46 counties

Barbour County, AL, Bullock County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Pike County, AL, Russell County, AL, Calhoun County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Harris County, GA, Lee County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Muscogee County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Webster County, GA, Worth 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.0 hours before the alert went out and 113 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, Tallahassee Rgnl, FL at 12:00Z on 2007-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 15 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, Tallahassee Rgnl, FL at 12:00Z on 2007-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 322 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
15 J/kg
Mixed-layer CIN
-377 J/kg
Mixed-layer LCL
891 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
322 m²/s²
0-3 km storm-relative helicity
447 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

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
Mar 1, 12:12 AM CSTMesoscale DiscussionSPCColbert, Franklin, Lauderdale2 hr
Mar 1, 1:05 AM CSTSevere Thunderstorm WatchSPCColbert, Franklin, Lauderdale7 hr
Mar 1, 2:57 AM CSTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Clarke, Coffee and 15 more2 hr
Mar 1, 4:18 AM CSTMesoscale DiscussionSPCColbert, Franklin, Lauderdale117 min
Mar 1, 6:54 AM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Cleburne, Colbert and 24 more66 min
Mar 1, 7:28 AM CSTTornado Watch PDSSPCBaldwin, Bibb, Blount, Chilton, Choctaw, Clarke and 29 more12 hr
Mar 1, 9:47 AM CSTTornado Watch PDSSPCAutauga, Barbour, Bullock, Butler, Calhoun, Chambers and 26 more10 hr
Mar 1, 10:33 AM CSTMesoscale DiscussionSPCColbert, Franklin, Lamar, Lauderdale, Marion, Pickens117 min
Mar 1, 11:39 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 35 more2 hr
Mar 1, 1:40 PM CSTMesoscale DiscussionSPCDale, Henry65 min
Mar 1, 2:41 PM CSTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 43 more94 min
Mar 1, 5:22 PM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Blount, Bullock and 59 more83 min
Mar 1, 2:59 PM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 12 more2 hr
Mar 1, 3:35 PM CSTTornado WatchSPCAlachua, Baker, Bradford, Brevard, Clay, Columbia and 23 more9 hr

Nearby

Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in Alabama, 2007Mesoscale Discussions in Florida, 2007Every mesoscale discussion 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.