Alert archive / Florida / Mesoscale Discussions in 2008

Mesoscale Discussion 569

April 5, 20089 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2008, 4:28 PM EDT for 9 counties in Florida. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Apr 5, 2008, 4:28 PM EDT (20:28 UTC)
Expired
Apr 5, 2008, 6:00 PM EDT
In force
92 min
Issued by
the Storm Prediction Center

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Columbia County, FL, Gilchrist County, FL, Lafayette County, FL, Madison County, FL, Suwannee County, FL, Union County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.5 hours before the alert went out and 162 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 2008-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1506 joules per kilogram.LCLEL10008507005003002001001 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 2008-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
1506 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
493 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.6

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 4, 11:37 PM EDTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa83 min
Apr 5, 10:45 AM EDTMesoscale DiscussionSPCBaker, Gadsden, Hamilton, Jefferson, Leon, Madison and 1 more90 min
Apr 5, 11:25 AM EDTSevere Thunderstorm WatchSPCAlachua, Baker, Bay, Bradford, Calhoun, Clay and 22 more9 hr
Apr 5, 1:47 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 11 more88 min
Apr 5, 6:41 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Brevard, Citrus, Clay and 20 more94 min

Nearby

Mesoscale 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.