Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 218

March 9, 2011Madison County, Florida; Echols County, Lowndes County, Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2011, 4:14 PM EST for Madison County, Florida; Echols County, Lowndes County, Georgia. It was in force for 31 min.

The area

The outline as issued.

The facts

Issued
Mar 9, 2011, 4:14 PM EST (21:14 UTC)
Expired
Mar 9, 2011, 4:45 PM EST
In force
31 min
Issued by
the Storm Prediction Center

Counties Madison County, FL, Echols County, GA, Lowndes County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.2 hours before the alert went out and 81 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 2011-03-09Temperature 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, Tallahassee Rgnl, FL at 12:00Z on 2011-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 348 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
348 m²/s²
0-3 km storm-relative helicity
471 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
Mar 9, 8:26 AM ESTTornado WatchSPCEscambia, Okaloosa, Santa Rosa6 hr
Mar 9, 9:32 AM ESTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 8 more28 min
Mar 9, 9:39 AM ESTTornado WatchSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more7 hr
Mar 9, 10:31 AM ESTMesoscale DiscussionSPCBay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 10 more59 min
Mar 9, 12:09 PM ESTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa66 min
Mar 9, 1:38 PM ESTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more67 min
Mar 9, 2:04 PM ESTMesoscale DiscussionSPCNassau26 min
Mar 9, 2:21 PM ESTSevere Thunderstorm WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 29 more6 hr
Mar 9, 4:38 PM ESTMesoscale DiscussionSPCBrantley, Bryan, Bulloch, Camden, Charlton, Chatham and 14 more67 min

Nearby

Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Florida, 2011Every mesoscale discussion in 2011

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.