Alert archive / Georgia / Mesoscale Discussions in 2004
Mesoscale Discussion 1021
The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 2:27 PM EDT for 4 states. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- May 31, 2004, 2:27 PM EDT (18:27 UTC)
- Expired
- May 31, 2004, 3:30 PM EDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 26 counties
Hamilton County, FL, Atkinson County, GA, Brantley County, GA, Chatham County, GA, Clinch County, GA, Echols County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA, Bladen County, NC, Columbus County, NC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 54 km from the middle of the area, began a volume at 18:29 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, 6.5 hours before the alert went out and 129 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
417 ACUS11 KWNS 311827 SWOMCD SPC MCD 311827 NCZ000-SCZ000-GAZ000-FLZ000-311930- MESOSCALE DISCUSSION 1021 NWS STORM PREDICTION CENTER NORMAN OK 0127 PM CDT MON MAY 31 2004 AREAS AFFECTED...SERN GA/SRN-ERN SC/PORTIONS SRN NC CONCERNING...SEVERE THUNDERSTORM WATCH 354... VALID 311827Z - 311930Z GREATEST SEVERE POTENTIAL DURING THE NEXT 1-2 HOURS IS EXPECTED ACROSS PORTIONS OF SERN GA...WHILE THE LACK OF LOW-LEVEL CONVERGENCE NEWD ACROSS ERN SC/SRN NC WILL LIKELY LIMIT THE THUNDERSTORM AND SEVERE POTENTIAL OVER THESE AREAS. 18Z SURFACE ANALYSIS COMBINED WITH VIS/RADAR IMAGERY SHOWED AN OUTFLOW BOUNDARY EXTENDING FROM SRN SC...NEAR 35 SW CHS...SWWD ACROSS SERN GA. THE STRONGEST STORM WAS LOCATED OVER LOWNDES COUNTY AND IS EXPECTED TO MOVE ACROSS THE FAR SWRN PORTION OF WW 354 FROM ECHOLS CHARLTON COUNTIES INTO SRN-SERN GA THROUGH 20Z. AIR MASS SOUTH OF THE E AND SEWD MOVING OUTFLOW BOUNDARY IS MODERATELY UNSTABLE WITH DEEP LAYER SHEAR INCREASING TO 30 KT FOR ORGANIZED STORMS WITH HAIL/DAMAGING WINDS POSSIBLE. ..PETERS.. 05/31/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RAH...ILM...CHS...CAE...JAX...TAE... 30448305 31248309 31928133 32598069 33828056 34907829 32887829 31348137
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 10:21 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 9 more | 54 min |
| May 31, 11:00 AM EDT | Tornado Watch | SPC | Escambia, Gadsden, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more | 6 hr |
| May 31, 11:18 AM EDT | Mesoscale Discussion | SPC | Nassau | 27 min |
| May 31, 11:40 AM EDT | Severe Thunderstorm Watch | SPC | Hamilton | 6 hr |
| May 31, 2:06 PM EDT | Mesoscale Discussion | SPC | Escambia, Gadsden, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more | 54 min |
| May 31, 3:10 PM EDT | Severe Thunderstorm Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 5 more | 5 hr |
| May 31, 4:30 PM EDT | Tornado Watch | SPC | Bay, Calhoun, Gadsden, Hamilton, Holmes, Jackson and 5 more | 4 hr |
| May 31, 6:28 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 3 more | 92 min |
| May 31, 6:59 PM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Gadsden, Jefferson, Leon, Liberty and 1 more | 61 min |
| May 31, 7:30 PM EDT | Tornado Watch | SPC | Baker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more | 4 hr |
| May 30, 10:15 PM EDT | Tornado Watch | SPC | Dade | 7 hr |
| May 31, 12:05 AM EDT | Mesoscale Discussion | SPC | Dade | 55 min |
| May 31, 1:40 AM EDT | Tornado Watch | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 21 more | 5 hr |
| May 31, 2:06 AM EDT | Mesoscale Discussion | SPC | Dade | 84 min |
| May 31, 4:40 AM EDT | Mesoscale Discussion | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 21 more | 95 min |
| May 31, 4:45 AM EDT | Tornado Watch | SPC | Barrow, Butts, Carroll, Clayton, Cobb, Coweta and 22 more | 5 hr |
| May 31, 6:31 AM EDT | Mesoscale Discussion | SPC | Butts, Carroll, Clayton, Cobb, Coweta, Crawford and 20 more | 119 min |
| May 31, 9:10 AM EDT | Severe Thunderstorm Watch | SPC | Burke, Columbia, Elbert, Glascock, Greene, Hancock and 12 more | 5 hr |
| May 31, 5:50 AM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 21 more | 5 hr |
| May 31, 7:56 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Caswell, Davidson, Davie and 13 more | 2 hr |
| May 31, 12:46 PM EDT | Mesoscale Discussion | SPC | Robeson, Sampson | 29 min |
| May 31, 3:50 PM EDT | Tornado Watch | SPC | Camden, Currituck, Pasquotank | 6 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.