Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 1017

May 31, 20044 states

The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 11:18 AM EDT for 4 states. It was in force for 27 min.

The area

The outline as issued.

The facts

Issued
May 31, 2004, 11:18 AM EDT (15:18 UTC)
Expired
May 31, 2004, 11:45 AM EDT
In force
27 min
Issued by
the Storm Prediction Center
All 71 counties

Nassau County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Jenkins County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Bladen County, NC, Brunswick County, NC, Columbus County, NC, Cumberland County, NC, New Hanover County, NC, Pender County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Charleston,SC radar (KCLX), 98 km from the middle of the area, began a volume at 15:21 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 3.3 hours before the alert went out and 12 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 12:00Z on 2004-05-31Temperature 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 12:00Z on 2004-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
-109 J/kg
Mixed-layer LCL
1142 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

671 
ACUS11 KWNS 311518
SWOMCD
SPC MCD 311518 
NCZ000-SCZ000-GAZ000-FLZ000-311545-

MESOSCALE DISCUSSION 1017
NWS STORM PREDICTION CENTER NORMAN OK
1018 AM CDT MON MAY 31 2004

AREAS AFFECTED...PORTIONS OF SERN  GA/SRN-ERN SC/SRN NC

CONCERNING...SEVERE THUNDERSTORM WATCH 352...

VALID 311518Z - 311545Z

WW WILL BE REQUIRED SOON FOR PORTIONS OF SERN GA...SRN/ERN SC AND
SRN NC.

15Z SURFACE ANALYSIS/RADAR TRENDS SHOW AN EWD MOVING OUTFLOW
BOUNDARY EXTENDING FROM WEST CENTRAL SC SWWD TO CENTRAL/SRN GA...OR
20 NW CAE TO 35 SSE MCN.  AIR MASS IN ADVANCE OF THIS BOUNDARY HAS
CONTINUED TO DESTABILIZE THIS MORNING WITH MLCAPE VALUES RANGING
FROM 1500-2000 J/KG ATTM.  STORMS SHOULD INCREASE IN AREAL
COVERAGE/INTENSITY AS THE OUTFLOW BOUNDARY MOVES INTO THIS
INCREASINGLY UNSTABLE AIR MASS.  WIND PROFILES PER POINT FORECAST
SOUNDINGS ARE FAVORABLE FOR DAMAGING WINDS.

..PETERS.. 05/31/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MHX...RAH...ILM...CHS...CAE...JAX...FFC...TAE...

30548136 30498284 32278307 34318100 34847969 35157853
34457722 34287726 33547842 32488008

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 31, 10:21 AM EDTMesoscale DiscussionSPCBay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 9 more54 min
May 31, 11:00 AM EDTTornado WatchSPCEscambia, Gadsden, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more6 hr
May 31, 11:40 AM EDTSevere Thunderstorm WatchSPCHamilton6 hr
May 31, 2:06 PM EDTMesoscale DiscussionSPCEscambia, Gadsden, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more54 min
May 31, 2:27 PM EDTMesoscale DiscussionSPCHamilton63 min
May 31, 3:10 PM EDTSevere Thunderstorm WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 5 more5 hr
May 31, 4:30 PM EDTTornado WatchSPCBay, Calhoun, Gadsden, Hamilton, Holmes, Jackson and 5 more4 hr
May 31, 6:28 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 3 more92 min
May 31, 6:59 PM EDTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Jefferson, Leon, Liberty and 1 more61 min
May 31, 7:30 PM EDTTornado WatchSPCBaker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more4 hr
May 30, 10:15 PM EDTTornado WatchSPCDade7 hr
May 31, 12:05 AM EDTMesoscale DiscussionSPCDade55 min
May 31, 1:40 AM EDTTornado WatchSPCBanks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 21 more5 hr
May 31, 2:06 AM EDTMesoscale DiscussionSPCDade84 min
May 31, 4:40 AM EDTMesoscale DiscussionSPCBanks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 21 more95 min
May 31, 4:45 AM EDTTornado WatchSPCBarrow, Butts, Carroll, Clayton, Cobb, Coweta and 22 more5 hr
May 31, 6:31 AM EDTMesoscale DiscussionSPCButts, Carroll, Clayton, Cobb, Coweta, Crawford and 20 more119 min
May 31, 9:10 AM EDTSevere Thunderstorm WatchSPCBurke, Columbia, Elbert, Glascock, Greene, Hancock and 12 more5 hr
May 31, 5:50 AM EDTSevere Thunderstorm WatchSPCAlamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 21 more5 hr
May 31, 7:56 AM EDTMesoscale DiscussionSPCAlamance, Anson, Cabarrus, Caswell, Davidson, Davie and 13 more2 hr
May 31, 12:46 PM EDTMesoscale DiscussionSPCRobeson, Sampson29 min
May 31, 3:50 PM EDTTornado WatchSPCCamden, Currituck, Pasquotank6 hr

Nearby

Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in South Carolina, 2004Mesoscale Discussions in North Carolina, 2004Every mesoscale discussion in 2004

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.