Alert archive / Georgia / Mesoscale Discussions in 2003
Mesoscale Discussion 302
The Storm Prediction Center issued this mesoscale discussion at Mar 20, 2003, 2:06 AM CST for 5 counties in Florida; 52 counties in Georgia; Allendale County, Bamberg County, South Carolina. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Mar 20, 2003, 2:06 AM CST (08:06 UTC)
- Expired
- Mar 20, 2003, 3:00 AM CST
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 59 counties
Calhoun County, FL, Gadsden County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brooks County, GA, Bulloch County, GA, Burke County, GA, Calhoun County, GA, Candler County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Emanuel County, GA, Evans County, GA, Grady County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pulaski County, GA, Screven County, GA, Seminole County, GA, Tattnall County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Washington County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA, Allendale County, SC, Bamberg County, SC
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.1 hours before the alert went out and 135 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
- 1137 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 511 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
627 ACUS11 KWNS 200806 SWOMCD SPC MCD 200806 SCZ000-GAZ000-FLZ000-ALZ000-200900- MESOSCALE DISCUSSION 0302 NWS STORM PREDICTION CENTER NORMAN OK 0206 AM CST THU MAR 20 2003 AREAS AFFECTED...CNTRL AND SRN GA CNTRL ERN FL PANHANDLE SERN SC CONCERNING...TORNADO WATCH 62... VALID 200806Z - 200900Z TORNADO WATCH 62 WILL EXPIRE AT 09Z. ANOTHER TORNADO WATCH WILL LIKELY BE ISSUED BY 0830Z TO REPLACE WW 62 FOR CNTRL/SRN GA AND SERN SC INTO THE FL PANHANDLE E OF ONGOING LINE OF STORMS. WARM/MOIST MODERATELY UNSTABLE ATMOSPHERE REMAINS IN PLACE OVER CNTRL/S GA INTO THE FL PANHANDLE S OF BOUNDARY THAT EXTENDS FROM THE ERN CAROLINAS THROUGH CNTRL GA. LINE OF STORMS FROM CNTRL GA SSWWD INTO THE WRN FL PANHANDLE IS EXPECTED TO CONTINUE SLOWLY EWD AIDED BY MOIST INFLOW ALONG 40 TO 50 KT SLY LOW LEVEL JET. STRONG SHEAR WILL PERSIST OVER THE WARM SECTOR E OF THE LINE WITH 0-3 STORM RELATIVE HELICITIES IN EXCESS OF 300 M2/S2 AND STRONG DEEP LAYER SHEAR. THIS SUGGESTS ISOLATED SUPERCELLS WILL REMAIN POSSIBLE WITHIN THE LINE AS IT CONTINUES EWD WITH ATTENDANT THREAT FOR ISOLATED TORNADOES. ..DIAL.. 03/20/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CHS...CAE...JAX...FFC...TAE... 30418414 29878543 31108523 33028306 33288085 31878197
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 19, 8:41 PM CST | Mesoscale Discussion | SPC | Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton and 1 more | 3 hr |
| Mar 19, 9:25 PM CST | Tornado Watch | SPC | Bay, Calhoun, Gulf, Holmes, Jackson, Okaloosa and 3 more | 6 hr |
| Mar 19, 11:52 PM CST | Mesoscale Discussion | SPC | Calhoun, Gadsden, Hamilton, Jackson, Jefferson, Lafayette and 5 more | 2 hr |
| Mar 20, 2:40 AM CST | Tornado Watch | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Hamilton and 7 more | 5 hr |
| Mar 20, 5:12 AM CST | Mesoscale Discussion | SPC | Bay, Calhoun, Gadsden, Gulf, Hamilton, Jefferson and 5 more | 2 hr |
| Mar 20, 1:35 PM CST | Tornado Watch | SPC | Columbia, Gadsden, Hamilton, Jefferson, Leon, Liberty and 1 more | 6 hr |
| Mar 20, 3:21 PM CST | Mesoscale Discussion | SPC | Baker, Hamilton, Jefferson, Madison, Nassau | 114 min |
| Mar 20, 5:57 PM CST | Mesoscale Discussion | SPC | Baker, Columbia, Hamilton, Jefferson, Lafayette, Leon and 5 more | 2 hr |
| Mar 19, 6:04 PM CST | Mesoscale Discussion | SPC | Appling, Bacon, Brantley, Bryan, Bulloch, Camden and 15 more | 116 min |
| Mar 19, 6:15 PM CST | Tornado Watch | SPC | Appling, Bacon, Bryan, Bulloch, Candler, Chatham and 11 more | 4 hr |
| Mar 19, 7:58 PM CST | Mesoscale Discussion | SPC | Burke, Columbia, Glascock, Jefferson, Jenkins, Lincoln and 6 more | 3 hr |
| Mar 19, 10:16 PM CST | Mesoscale Discussion | SPC | Baldwin, Banks, Barrow, Bartow, Butts, Carroll and 50 more | 2 hr |
| Mar 19, 11:20 PM CST | Severe Thunderstorm Watch | SPC | Banks, Barrow, Butts, Clarke, Clayton, Cobb and 38 more | 4 hr |
| Mar 20, 7:40 AM CST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Berrien, Brantley, Brooks and 20 more | 6 hr |
| Mar 20, 10:09 AM CST | Mesoscale Discussion | SPC | Atkinson, Berrien, Brantley, Brooks, Clinch, Colquitt and 6 more | 2 hr |
| Mar 20, 12:33 PM CST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Berrien, Brantley, Brooks and 10 more | 117 min |
| Mar 20, 1:16 AM CST | Mesoscale Discussion | SPC | Georgetown, Horry, Marion, Williamsburg | 119 min |
| Mar 20, 4:48 AM CST | Mesoscale Discussion | SPC | Calhoun, Clarendon, Darlington, Dillon, Florence, Horry and 5 more | 117 min |
| Mar 20, 9:10 AM CST | Tornado Watch | SPC | Georgetown, Horry | 5 hr |
| Mar 20, 9:40 AM CST | Mesoscale Discussion | SPC | Horry | 2 hr |
Nearby
Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Florida, 2003Mesoscale Discussions in South Carolina, 2003Every mesoscale discussion in 2003
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.