Alert archive / Florida / Mesoscale Discussions in 2013

Mesoscale Discussion 206

February 23, 20138 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2013, 6:59 PM EST for 8 counties in Florida. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Feb 23, 2013, 6:59 PM EST (23:59 UTC)
Expired
Feb 23, 2013, 8:00 PM EST
In force
61 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Columbia County, FL, Dixie County, FL, Gilchrist County, FL, Lafayette County, FL, Levy County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 12.0 hours before the alert went out and 130 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 2013-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 118 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 2013-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 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
118 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
677 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.8

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 23, 4:59 AM ESTMesoscale DiscussionSPCCalhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more2 hr

Nearby

Mesoscale Discussions in Florida, 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.