Alert archive / Florida / Mesoscale Discussions in 2013

Mesoscale Discussion 218

February 25, 20135 states

The Storm Prediction Center issued this mesoscale discussion at Feb 25, 2013, 9:07 AM CST for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Feb 25, 2013, 9:07 AM CST (15:07 UTC)
Expired
Feb 25, 2013, 11:30 AM CST
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 61 counties

Baldwin County, AL, Escambia County, AL, Geneva County, AL, Mobile County, AL, Alachua County, FL, Baker County, FL, Bay County, FL, Bradford County, FL, Calhoun County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Nassau County, FL, Okaloosa County, FL, Putnam County, FL, Saint Johns County, FL, Santa Rosa County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Cook County, GA, Decatur County, GA, Echols County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Seminole County, GA, Thomas County, GA, Ware County, GA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Perry County, MS, Stone County, MS

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, 3.1 hours before the alert went out and 140 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 2013-02-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 2013-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 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
10 J/kg
Mixed-layer CIN
-262 J/kg
Mixed-layer LCL
460 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
339 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 24, 6:48 PM CSTMesoscale DiscussionSPCBaldwin, Mobile87 min
Feb 25, 2:50 AM CSTMesoscale DiscussionSPCBaldwin, Mobile115 min
Feb 25, 2:52 PM CSTMesoscale DiscussionSPCBaldwin, Choctaw, Clarke, Conecuh, Covington, Escambia and 3 more83 min
Feb 25, 3:54 PM CSTTornado WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more6 hr
Feb 25, 11:26 AM CSTTornado WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more7 hr
Feb 25, 1:43 PM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 11 more62 min
Feb 25, 5:43 PM CSTMesoscale DiscussionSPCAlachua, Bradford, Clay, Duval, Flagler, Gilchrist and 5 more62 min
Feb 24, 11:57 PM CSTMesoscale DiscussionSPCAscension, Assumption, Iberia, Jefferson, Lafourche, Livingston and 9 more63 min
Feb 25, 12:04 AM CSTSevere Thunderstorm WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 14 more8 hr
Feb 25, 9:25 AM CSTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 56 more65 min
Feb 25, 12:26 PM CSTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 58 more10 hr
Feb 25, 2:15 PM CSTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 53 more90 min

Nearby

Mesoscale Discussions in Florida, 2013Mesoscale Discussions in Georgia, 2013Mesoscale Discussions in Mississippi, 2013Every mesoscale discussion in 2013

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.