Alert archive / Georgia / Mesoscale Discussions in 2015

Mesoscale Discussion 170

March 31, 201523 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2015, 9:27 PM EDT for 23 counties in Georgia. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2015, 9:27 PM EDT (01:27 UTC)
Expired
Mar 31, 2015, 11:00 PM EDT
In force
93 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 23 counties

Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Candler County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Tattnall County, GA, Toombs County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA

The radar

The Moody AFB radar (KVAX), 120 km from the middle of the area, began a volume at 01:27 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

Jacksonville, FL (KJAX), launched 00:00Z, 1.5 hours before the alert went out and 143 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, Jacksonville, FL at 00:00Z on 2015-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1164 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, Jacksonville, FL at 00:00Z on 2015-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.1939587897117Sfc1 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
1164 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1394 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.5
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
Mar 31, 9:08 PM EDTMesoscale DiscussionSPCBibb, Bleckley, Carroll, Chattahoochee, Coweta, Crawford and 35 more67 min

Nearby

Mesoscale Discussions in Georgia, 2015Every mesoscale discussion in 2015

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.