Alert archive / Georgia / Mesoscale Discussions in 2005
Mesoscale Discussion 421
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2005, 3:55 PM EST for 28 counties in Georgia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2005, 3:55 PM EST (20:55 UTC)
- Expired
- Mar 27, 2005, 6:00 PM EST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Atkinson County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Calhoun County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Dooly County, GA, Dougherty County, GA, Irwin County, GA, Lanier County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Mitchell County, GA, Randolph County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Telfair County, GA, Terrell County, GA, Tift County, GA, Turner County, GA, Webster County, GA, Wilcox County, GA, Worth County, GA
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 12:00Z, 8.9 hours before the alert went out and 145 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
- 253 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 408 m²/s²
- 0-3 km storm-relative helicity
- 497 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 272055 SWOMCD SPC MCD 272055 GAZ000-ALZ000-272300- MESOSCALE DISCUSSION 0421 NWS STORM PREDICTION CENTER NORMAN OK 0255 PM CST SUN MAR 27 2005 AREAS AFFECTED...PARTS OF SRN GA CONCERNING...TORNADO WATCH 97... VALID 272055Z - 272300Z AFTER TEMPORARY BREAK IN CONVECTIVE ACTIVITY...SEVERE THREAT... INCLUDING RISK FOR TORNADOES...STILL IS EXPECTED TO INCREASE NEXT FEW HOURS. AIDED BY SEA BREEZE...CONVECTIVE BOUNDARY HAS PROGRESSED SOUTHWARD ...INLAND ACROSS THE JACKSONVILLE AREA. HOWEVER..FARTHER WEST...IN RESPONSE TO DAYTIME HEATING AND BACKING SURFACE FLOW WITH APPROACH OF UPPER TROUGH...BOUNDARY IS BECOMING MORE DIFFUSE. STRONGER PRESSURE FALLS HAVE BEGUN TO DEVELOP ACROSS SOUTHWEST GEORGIA...AND SURFACE-BASED DESTABILIZATION IS ONGOING AROUND ALBANY GA AND AREAS NORTH OF VALDOSTA. RISK FOR SUPERCELLS APPEARS LIKELY TO INCREASE ACROSS THIS REGION BETWEEN NOW AND 28/00Z...AS MID-LEVEL HEIGHTS FALL. LINGERING LOW-LEVEL BAROCLINICITY AND SOUTH SOUTHEASTERLY BOUNDARY LAYER WINDS BENEATH 30 TO 40 KT SOUTHWESTERLY LOW-LEVEL JET WILL CREATE FAVORABLE ENVIRONMENT FOR TORNADOES...IN ADDITION TO LARGE HAIL/ISOLATED DAMAGING WIND GUSTS. ..KERR.. 03/27/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...JAX...FFC...TAE...BMX... 32278491 32488407 31978290 31288271 30998311 30978357 31268444 31538497
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 7:05 PM EST | Severe Thunderstorm Watch | SPC | Floyd, Haralson, Polk | 3 hr |
| Mar 26, 9:45 PM EST | Tornado Watch | SPC | Bartow, Carroll, Floyd, Haralson, Polk | 7 hr |
| Mar 26, 10:00 PM EST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 61 more | 7 hr |
| Mar 26, 11:43 PM EST | Mesoscale Discussion | SPC | Baker, Brooks, Calhoun, Clay, Colquitt, Decatur and 10 more | 62 min |
| Mar 27, 12:05 AM EST | Tornado Watch | SPC | Brantley, Camden, Charlton, Glynn, Ware | 5 hr |
| Mar 27, 2:14 AM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 53 more | 91 min |
| Mar 27, 3:27 AM EST | Mesoscale Discussion | SPC | Baker, Berrien, Brooks, Calhoun, Clay, Colquitt and 23 more | 63 min |
| Mar 27, 4:45 AM EST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 45 more | 6 hr |
| Mar 27, 7:53 AM EST | Mesoscale Discussion | SPC | Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 28 more | 2 hr |
| Mar 27, 10:08 AM EST | Mesoscale Discussion | SPC | Atkinson, Berrien, Brantley, Brooks, Camden, Charlton and 14 more | 37 min |
| Mar 27, 10:35 AM EST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 55 more | 7 hr |
| Mar 27, 12:06 PM EST | Mesoscale Discussion | SPC | Haralson, Polk | 54 min |
| Mar 27, 12:40 PM EST | Tornado Watch | SPC | Bartow, Butts, Carroll, Chattooga, Cherokee, Clayton and 42 more | 5 hr |
| Mar 27, 1:13 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 35 more | 2 hr |
| Mar 27, 5:55 PM EST | Tornado Watch | SPC | Atkinson, Baker, Baldwin, Banks, Barrow, Bartow and 104 more | 7 hr |
Nearby
Mesoscale Discussions in Georgia, 2005Every mesoscale discussion in 2005
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.