Alert archive / Georgia / Mesoscale Discussions in 2015

Mesoscale Discussion 461

April 25, 201512 counties in Florida; 71 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2015, 6:19 PM CDT for 12 counties in Florida; 71 counties in Georgia. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Apr 25, 2015, 6:19 PM CDT (23:19 UTC)
Expired
Apr 25, 2015, 7:15 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 83 counties

Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Hamilton County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Calhoun County, GA, Camden County, GA, Charlton County, GA, Chattahoochee County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Emanuel County, GA, Grady County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Johnson County, GA, Jones County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Ware County, GA, Washington County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.3 hours before the alert went out and 126 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 2015-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 215 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 2015-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 304 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
215 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
304 m²/s²
0-3 km storm-relative helicity
365 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

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
Apr 25, 4:12 AM CDTMesoscale DiscussionSPCEscambia, Santa Rosa63 min
Apr 25, 5:00 AM CDTTornado WatchSPCBay, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more7 hr
Apr 25, 7:41 AM CDTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Holmes, Jackson, Jefferson and 8 more94 min
Apr 25, 8:08 AM CDTTornado WatchSPCBaker, Calhoun, Columbia, Duval, Franklin, Gadsden and 11 more7 hr
Apr 25, 11:20 AM CDTMesoscale DiscussionSPCColumbia, Gadsden, Hamilton, Jefferson, Lafayette, Leon and 5 more85 min
Apr 25, 1:36 PM CDTSevere Thunderstorm WatchSPCEscambia, Okaloosa, Santa Rosa4 hr
Apr 25, 1:50 PM CDTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa85 min
Apr 25, 2:30 PM CDTMesoscale DiscussionSPCBaker, Columbia, Duval, Gadsden, Hamilton, Jefferson and 5 more60 min
Apr 25, 3:07 PM CDTSevere Thunderstorm WatchSPCBay, Calhoun, Columbia, Franklin, Gadsden, Gulf and 13 more7 hr
Apr 25, 2:10 PM CDTMesoscale DiscussionSPCCarroll, Chattahoochee, Coweta, Haralson, Harris, Heard and 2 more95 min
Apr 25, 4:38 PM CDTSevere Thunderstorm WatchSPCBaldwin, Bibb, Bleckley, Butts, Chattahoochee, Clayton and 46 more5 hr
Apr 25, 5:07 PM CDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 7 more53 min
Apr 25, 5:28 PM CDTSevere Thunderstorm WatchSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 7 more4 hr

Nearby

Mesoscale Discussions in Georgia, 2015Mesoscale Discussions in Florida, 2015Every mesoscale discussion in 2015

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.