Alert archive / Florida / Mesoscale Discussions in 2013

Mesoscale Discussion 232

February 26, 201322 counties in Florida; 6 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Feb 26, 2013, 6:19 AM EST for 22 counties in Florida; 6 counties in Georgia. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Feb 26, 2013, 6:19 AM EST (11:19 UTC)
Expired
Feb 26, 2013, 8:15 AM EST
In force
116 min
Issued by
the Storm Prediction Center
All 28 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hernando County, FL, Hillsborough County, FL, Lake County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Nassau County, FL, Pasco County, FL, Pinellas County, FL, Putnam County, FL, Saint Johns County, FL, Sumter County, FL, Union County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Glynn County, GA, Ware County, GA

The radar

The Tampa radar (KTBW), 162 km from the middle of the area, began a volume at 11:20 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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 00:00Z, 11.3 hours before the alert went out and 165 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 00:00Z on 2013-02-26Temperature 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, Jacksonville, FL at 00:00Z on 2013-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 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
435 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
384 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
Feb 25, 8:57 PM ESTMesoscale DiscussionSPCEscambia, Santa Rosa63 min
Feb 25, 10:31 PM ESTMesoscale DiscussionSPCBay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 10 more59 min
Feb 26, 12:59 AM ESTTornado WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 12 more8 hr
Feb 26, 3:51 AM ESTMesoscale DiscussionSPCCalhoun, Dixie, Gadsden, Gulf, Hamilton, Jackson and 8 more114 min
Feb 26, 6:49 AM ESTTornado WatchSPCAlachua, Baker, Bradford, Brevard, Charlotte, Citrus and 31 more8 hr
Feb 26, 11:38 AM ESTMesoscale DiscussionSPCCharlotte, Citrus, Clay, DeSoto, Duval, Flagler and 19 more67 min
Feb 26, 8:44 AM ESTMesoscale DiscussionSPCBulloch, Effingham, Screven3 hr

Nearby

Mesoscale Discussions in Florida, 2013Mesoscale Discussions in Georgia, 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; radar from the NEXRAD Level II archive.