Alert archive / North Carolina / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 190
The Storm Prediction Center issued this severe thunderstorm watch at Apr 26, 2012, 8:10 AM EDT for 14 counties in Georgia; 25 counties in North Carolina; Bradley County, Hamilton County, Polk County, Tennessee. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2012, 8:10 AM EDT (12:10 UTC)
- Expired
- Apr 26, 2012, 11:38 AM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 42 counties
Catoosa County, GA, Dade County, GA, Fannin County, GA, Gilmer County, GA, Habersham County, GA, Lumpkin County, GA, Murray County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Cherokee County, NC, Clay County, NC, Cleveland County, NC, Gaston County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC, Bradley County, TN, Hamilton County, TN, Polk County, TN
The radar
The Knoxville radar (KMRX), 69 km from the middle of the area, began a volume at 12:11 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 8:15 AM EDT | Severe Thunderstorm Warning | GSP | Avery, Mitchell, Yancey | 60 min |
| Apr 26, 8:26 AM EDT | Severe Thunderstorm Warning | GSP | Buncombe, Haywood, Henderson, Jackson, Transylvania | 64 min |
| Apr 26, 8:39 AM EDT | Severe Thunderstorm Warning | GSP | Graham, Macon | 81 min |
| Apr 26, 8:46 AM EDT | Severe Thunderstorm Warning | GSP | Burke, Caldwell, McDowell, Polk, Rutherford | 59 min |
| Apr 26, 9:10 AM EDT | Severe Thunderstorm Warning | MRX | Cherokee, Clay | 65 min |
| Apr 26, 9:34 AM EDT | Severe Thunderstorm Warning | FFC | Fannin, Lumpkin, Towns, Union, White | 41 min |
| Apr 26, 9:41 AM EDT | Severe Thunderstorm Warning | GSP | Habersham, Rabun, Stephens | 64 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 0.2 hours before the alert went out and 246 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
- 36 J/kg
- Mixed-layer CIN
- -279 J/kg
- Mixed-layer LCL
- 962 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 266 m²/s²
- 0-3 km storm-relative helicity
- 265 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 8:47 AM EDT | Mesoscale Discussion | SPC | Banks, Dawson, Elbert, Fannin, Franklin, Gilmer and 13 more | 88 min |
| Apr 26, 7:09 PM EDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Catoosa, Chattooga, Cherokee and 27 more | 96 min |
| Apr 26, 7:24 AM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 20 more | 96 min |
| Apr 26, 4:22 PM EDT | Mesoscale Discussion | SPC | Buncombe, Graham, Haywood, Henderson, Jackson, Polk and 2 more | 83 min |
| Apr 26, 5:07 AM EDT | Mesoscale Discussion | SPC | Anderson, Campbell, Claiborne, Clay, Cumberland, Davidson and 15 more | 83 min |
| Apr 26, 6:22 AM EDT | Severe Thunderstorm Watch | SPC | Anderson, Bedford, Bledsoe, Blount, Campbell, Cannon and 44 more | 3 hr |
| Apr 26, 2:23 PM EDT | Mesoscale Discussion | SPC | Cheatham, Clay, Davidson, DeKalb, Dickson, Fentress and 17 more | 2 hr |
| Apr 26, 3:11 PM EDT | Severe Thunderstorm Watch | SPC | Bedford, Campbell, Cannon, Cheatham, Claiborne, Clay and 30 more | 6 hr |
| Apr 26, 5:52 PM EDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dickson and 13 more | 83 min |
| Apr 26, 6:40 PM EDT | Mesoscale Discussion | SPC | Anderson, Bedford, Bledsoe, Blount, Campbell, Cannon and 58 more | 95 min |
Nearby
Severe Thunderstorm Watches in North Carolina, 2012Severe Thunderstorm Watches in Georgia, 2012Severe Thunderstorm Watches in Tennessee, 2012Every severe thunderstorm watch in 2012
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.