Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 308

February 26, 200826 counties in Florida; 37 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Feb 26, 2008, 2:02 PM EST for 26 counties in Florida; 37 counties in Georgia. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Feb 26, 2008, 2:02 PM EST (19:02 UTC)
Expired
Feb 26, 2008, 3:30 PM EST
In force
88 min
Issued by
the Storm Prediction Center
All 63 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Levy County, FL, Liberty County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Dodge County, GA, Echols County, GA, Glynn County, GA, Grady County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Lamar County, GA, Lanier County, GA, Lowndes County, GA, Mitchell County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Twiggs County, GA, Ware County, GA, Wayne County, GA, Wheeler 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

Jacksonville, FL (KJAX), launched 12:00Z, 7.0 hours before the alert went out and 114 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, Jacksonville, FL at 12:00Z on 2008-02-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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, Jacksonville, FL at 12:00Z on 2008-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 170 square meters per square second.19395878Sfc1 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
20 J/kg
Mixed-layer CIN
-266 J/kg
Mixed-layer LCL
699 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
170 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Feb 26, 6:12 AM ESTSevere Thunderstorm WatchSPCEscambia, Okaloosa, Santa Rosa4 hr
Feb 26, 7:50 AM ESTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Holmes, Jackson, Okaloosa and 2 more85 min
Feb 26, 8:39 AM ESTSevere Thunderstorm WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 11 more6 hr
Feb 26, 10:22 AM ESTMesoscale DiscussionSPCBaker, Bay, Calhoun, Columbia, Gadsden, Gulf and 13 more83 min
Feb 26, 10:35 AM ESTMesoscale DiscussionSPCBaker, Bay, Calhoun, Columbia, Gadsden, Gulf and 13 more85 min
Feb 26, 11:00 AM ESTTornado WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 18 more9 hr
Feb 26, 2:41 PM ESTMesoscale DiscussionSPCBrevard, Broward, Charlotte, Citrus, DeSoto, Glades and 22 more94 min
Feb 26, 3:41 PM ESTTornado WatchSPCBrevard, Citrus, DeSoto, Hardee, Hernando, Highlands and 14 more5 hr
Feb 26, 5:41 AM ESTSevere Thunderstorm WatchSPCBaldwin, Barrow, Bibb, Bleckley, Butts, Carroll and 66 more7 hr
Feb 26, 11:25 AM ESTSevere Thunderstorm WatchSPCBryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more5 hr

Nearby

Mesoscale Discussions in Georgia, 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.