Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 837

May 9, 200824 counties in Georgia; Brunswick County, Columbus County, North Carolina; 20 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 9, 2008, 5:56 AM EDT for 24 counties in Georgia; Brunswick County, Columbus County, North Carolina; 20 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2008, 5:56 AM EDT (09:56 UTC)
Expired
May 9, 2008, 8:00 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 46 counties

Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Dodge County, GA, Dooly County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Montgomery County, GA, Pulaski County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Wheeler County, GA, Wilcox County, GA, Brunswick County, NC, Columbus County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Lee County, SC, Marion County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Charleston,SC radar (KCLX), 69 km from the middle of the area, began a volume at 09:57 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

Charleston AFB, SC (KCHS), launched 00:00Z, 9.9 hours before the alert went out and 100 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, Charleston AFB, SC at 00:00Z on 2008-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 712 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, Charleston AFB, SC at 00:00Z on 2008-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 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
712 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1034 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.5

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 9, 7:18 PM EDTMesoscale DiscussionSPCDade57 min
May 8, 8:38 PM EDTTornado WatchSPCDurham, Franklin, Granville, Lee, Vance, Wake and 1 more6 hr
May 8, 9:47 PM EDTMesoscale DiscussionSPCAlamance, Cabarrus, Caswell, Chatham, Davidson, Davie and 20 more58 min
May 9, 12:06 AM EDTMesoscale DiscussionSPCAlamance, Caswell, Durham, Granville, Guilford, Orange and 2 more54 min
May 9, 2:32 AM EDTMesoscale DiscussionSPCAlamance, Bertie, Camden, Caswell, Chatham, Chowan and 27 more88 min
May 9, 3:00 AM EDTTornado WatchSPCAlamance, Beaufort, Bertie, Camden, Caswell, Chatham and 34 more8 hr
May 9, 5:04 AM EDTMesoscale DiscussionSPCBertie, Camden, Chatham, Chowan, Currituck, Durham and 25 more56 min
May 9, 6:37 AM EDTMesoscale DiscussionSPCBertie, Camden, Chowan, Currituck, Edgecombe, Franklin and 11 more53 min
May 9, 8:29 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 18 more61 min

Nearby

Mesoscale Discussions in Georgia, 2008Mesoscale Discussions in South Carolina, 2008Mesoscale Discussions in North Carolina, 2008Every mesoscale discussion in 2008

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.