Alert archive / Georgia / Mesoscale Discussions in 2009

Mesoscale Discussion 862

May 24, 20096 counties in Alabama; 6 counties in Florida; 15 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 24, 2009, 12:24 PM CDT for 6 counties in Alabama; 6 counties in Florida; 15 counties in Georgia. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
May 24, 2009, 12:24 PM CDT (17:24 UTC)
Expired
May 24, 2009, 1:30 PM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 27 counties

Barbour County, AL, Bullock County, AL, Dale County, AL, Henry County, AL, Houston County, AL, Russell County, AL, Calhoun County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Stewart County, GA, Terrell County, GA, Webster County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.4 hours before the alert went out and 109 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 2009-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1699 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 2009-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
1699 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
30 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
May 24, 10:17 AM CDTMesoscale DiscussionSPCAlachua, Bradford, Broward, Charlotte, Citrus, Clay and 30 more58 min

Nearby

Mesoscale Discussions in Georgia, 2009Mesoscale Discussions in Alabama, 2009Mesoscale Discussions in Florida, 2009Every mesoscale discussion in 2009

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.