Alert archive / Florida / Mesoscale Discussions in 2014

Mesoscale Discussion 756

May 29, 201412 counties in Florida; Brooks County, Grady County, Thomas County, Georgia

The Storm Prediction Center issued this mesoscale discussion at May 29, 2014, 6:34 PM EDT for 12 counties in Florida; Brooks County, Grady County, Thomas County, Georgia. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
May 29, 2014, 6:34 PM EDT (22:34 UTC)
Expired
May 29, 2014, 8:30 PM EDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Citrus County, FL, Dixie County, FL, Gilchrist County, FL, Hernando County, FL, Jefferson County, FL, Lafayette County, FL, Levy County, FL, Madison County, FL, Pasco County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Brooks County, GA, Grady County, GA, Thomas County, GA

The radar

The Moody AFB radar (KVAX), 157 km from the middle of the area, began a volume at 22:37 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.6 hours before the alert went out and 159 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 2014-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 241 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 2014-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.1939Sfc1 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
241 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1056 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
100 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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Nearby

Mesoscale Discussions in Florida, 2014Mesoscale Discussions in Georgia, 2014Every mesoscale discussion in 2014

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.