Alert archive / Georgia / Mesoscale Discussions in 2017
Mesoscale Discussion 574
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2017, 3:29 PM EDT for 4 states. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2017, 3:29 PM EDT (19:29 UTC)
- Expired
- Apr 27, 2017, 5:00 PM EDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 30 counties
Banks County, GA, Forsyth County, GA, Franklin County, GA, Habersham County, GA, Hall County, GA, Hart County, GA, Jackson County, GA, Lumpkin County, GA, Madison County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, White County, GA, Buncombe County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Transylvania County, NC, Yancey County, NC, Anderson County, SC, Oconee County, SC, Pickens County, SC, Carter County, TN, Cocke County, TN, Unicoi County, TN
The radar
The Greer radar (KGSP), 83 km from the middle of the area, began a volume at 19:30 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.5 hours before the alert went out and 270 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
- 45 J/kg
- Mixed-layer CIN
- -363 J/kg
- Mixed-layer LCL
- 703 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 351 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 10:42 AM EDT | Mesoscale Discussion | SPC | Chattahoochee, Harris, Marion, Muscogee, Quitman, Stewart and 1 more | 2 hr |
| Apr 27, 1:30 PM EDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Burke, Butts, Chattahoochee and 45 more | 90 min |
| Apr 27, 1:47 PM EDT | Tornado Watch | SPC | Baldwin, Bibb, Bleckley, Burke, Butts, Chattahoochee and 44 more | 8 hr |
| Apr 27, 4:23 PM EDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Bulloch, Burke, Butts and 66 more | 97 min |
| Apr 27, 7:26 PM EDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Butts, Chattahoochee, Crawford, Hancock and 22 more | 64 min |
| Apr 26, 8:36 PM EDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Decatur, Hardeman, Hardin and 8 more | 84 min |
Nearby
Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in North Carolina, 2017Mesoscale Discussions in South Carolina, 2017Every mesoscale discussion in 2017
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.