Alert archive / Georgia / Tornado Watches in 2018
Tornado Watch 425
The Storm Prediction Center issued this tornado watch at Nov 6, 2018, 3:15 AM EST for 18 counties in Georgia; 5 counties in North Carolina; 14 counties in Tennessee. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 6, 2018, 3:15 AM EST (08:15 UTC)
- Expired
- Nov 6, 2018, 8:02 AM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 65 kt
All 37 counties
Catoosa County, GA, Chattooga County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Habersham County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Rabun County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Macon County, NC, Swain County, NC, Anderson County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Roane County, TN, Scott County, TN, Sevier County, TN
The radar
The Knoxville radar (KMRX), 80 km from the middle of the area, began a volume at 08:14 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 6, 3:43 AM EST | Severe Thunderstorm Warning | MRX | Loudon, McMinn, Meigs, Monroe, Rhea, Roane | 47 min |
| Nov 6, 3:58 AM EST | Severe Thunderstorm Warning | FFC | Catoosa, Chattooga, Dade, Walker, Whitfield | 62 min |
| Nov 6, 4:00 AM EST | Severe Thunderstorm Warning | MRX | Bradley, Hamilton | 45 min |
| Nov 6, 4:16 AM EST | Severe Thunderstorm Warning | MRX | Anderson, Blount, Knox, Loudon, Monroe, Roane | 44 min |
| Nov 6, 4:39 AM EST | Tornado Warning | MRX | Bradley, McMinn, Polk | 36 min |
| Nov 6, 4:44 AM EST | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Monroe, Polk | 61 min |
| Nov 6, 4:49 AM EST | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Knox, Union | 41 min |
| Nov 6, 4:52 AM EST | Severe Thunderstorm Warning | FFC | Fannin, Gilmer, Murray, Walker, Whitfield | 38 min |
| Nov 6, 4:52 AM EST | Severe Thunderstorm Warning | MRX | Blount, Hamblen, Jefferson, Knox, Sevier | 38 min |
| Nov 6, 4:57 AM EST | Tornado Warning | MRX | McMinn, Monroe | 30 min |
| Nov 6, 5:14 AM EST | Severe Thunderstorm Warning | MRX | Cherokee, Clay | 61 min |
| Nov 6, 5:21 AM EST | Severe Thunderstorm Warning | FFC | Fannin, Gilmer, Gordon, Murray, Pickens | 38 min |
| Nov 6, 5:21 AM EST | Severe Thunderstorm Warning | MRX | Cocke, Greene, Hamblen, Jefferson, Sevier | 39 min |
| Nov 6, 5:26 AM EST | Severe Thunderstorm Warning | GSP | Graham, Swain | 49 min |
| Nov 6, 7:04 AM EST | Severe Thunderstorm Warning | FFC | Cherokee, Dawson, Forsyth, Hall | 15 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 8.3 hours before the alert went out and 247 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 711 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 521 m²/s²
- 0-3 km storm-relative helicity
- 667 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
644
WWUS20 KWNS 060812
SEL5
SPC WW 060812
GAZ000-NCZ000-TNZ000-061400-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 425
NWS Storm Prediction Center Norman OK
415 AM EDT Tue Nov 6 2018
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northern Georgia
Western North Carolina
Eastern Tennessee
* Effective this Tuesday morning from 415 AM until 1000 AM EDT.
* Primary threats include...
A couple tornadoes possible
Scattered damaging winds and isolated significant gusts to 75
mph possible
SUMMARY...Fast-moving storms will cross the region through the early
morning hours. While instability will be minimal, continued
low-level moistening and very strong low/mid-level winds will
support fast-moving bowing segments and embedded meso-vortices
capable of wind damage and some tornado risk.
The tornado watch area is approximately along and 50 statute miles
east and west of a line from 50 miles north northeast of Knoxville
TN to 55 miles south southeast of Chattanooga TN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU5).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 423...WW 424...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24045.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 6, 2:40 AM EST | Mesoscale Discussion | SPC | Bartow, Catoosa, Chattooga, Dade, Dawson, Fannin and 13 more | 65 min |
| Nov 5, 8:04 PM EST | Tornado Watch | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 37 more | 8 hr |
| Nov 5, 10:28 PM EST | Mesoscale Discussion | SPC | Chester, Decatur, Dickson, Hardeman, Hardin, Henderson and 9 more | 2 hr |
| Nov 5, 11:30 PM EST | Tornado Watch | SPC | Bledsoe, Clay, Cumberland, DeKalb, Fentress, Franklin and 14 more | 7 hr |
Nearby
Tornado Watches in Georgia, 2018Tornado Watches in Tennessee, 2018Tornado Watches in North Carolina, 2018Every tornado watch in 2018
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.