Alert archive / Alabama / Tornado Watches in 2017
Tornado Watch 57
The Storm Prediction Center issued this tornado watch at Mar 1, 2017, 11:48 AM CST for 5 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 1, 2017, 11:48 AM CST (17:48 UTC)
- Expired
- Mar 1, 2017, 6:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 90 counties
Blount County, AL, Calhoun County, AL, Cherokee County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, St. Clair County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Itawamba County, MS, Kemper County, MS, Leake County, MS, Lee County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Tishomingo County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Cherokee County, NC, Clay County, NC, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Franklin County, TN, Hamilton County, TN, Knox County, TN, Lincoln County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN, Sevier County, TN
The radar
The Columbus AFB radar (KGWX), 37 km from the middle of the area, began a volume at 17:51 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
- 60%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
50 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 11:58 AM CST | Severe Thunderstorm Warning | HUN | Colbert, Lauderdale, Lawrence, Limestone | 32 min |
| Mar 1, 12:00 PM CST | Severe Thunderstorm Warning | HUN | Franklin, Lincoln, Moore | 30 min |
| Mar 1, 12:10 PM CST | Tornado Warning | HUN | Lauderdale, Limestone | 35 min |
| Mar 1, 12:11 PM CST | Severe Thunderstorm Warning | MRX | Bledsoe, Rhea | 29 min |
| Mar 1, 12:23 PM CST | Severe Thunderstorm Warning | MRX | Anderson, Blount, Knox, Loudon, Roane | 52 min |
| Mar 1, 12:32 PM CST | Severe Thunderstorm Warning | HUN | Colbert, Lawrence | 28 min |
| Mar 1, 12:35 PM CST | Flash Flood Warning | MRX | Anderson, Knox, Loudon, Roane | 3 hr |
| Mar 1, 12:36 PM CST | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Lee, Monroe | 39 min |
| Mar 1, 12:38 PM CST | Severe Thunderstorm Warning | JAN | Clay, Webster | 26 min |
| Mar 1, 12:44 PM CST | Severe Thunderstorm Warning | HUN | Limestone, Madison | 31 min |
| Mar 1, 12:52 PM CST | Severe Thunderstorm Warning | HUN | Franklin, Moore | 23 min |
| Mar 1, 12:53 PM CST | Severe Thunderstorm Warning | HUN | Lawrence, Limestone, Morgan | 37 min |
| Mar 1, 12:58 PM CST | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Marion, Meigs, Rhea, Sequatchie | 62 min |
| Mar 1, 1:01 PM CST | Severe Thunderstorm Warning | JAN | Attala, Holmes | 59 min |
| Mar 1, 1:06 PM CST | Severe Thunderstorm Warning | BMX | Marion | 24 min |
| Mar 1, 1:06 PM CST | Flash Flood Warning | MRX | Anderson, Grainger, Knox, Union | 3 hr |
| Mar 1, 1:10 PM CST | Severe Thunderstorm Warning | HUN | Jackson, Madison | 35 min |
| Mar 1, 1:16 PM CST | Severe Thunderstorm Warning | MEG | Monroe | 44 min |
| Mar 1, 1:19 PM CST | Severe Thunderstorm Warning | HUN | Madison | 26 min |
| Mar 1, 1:19 PM CST | Severe Thunderstorm Warning | HUN | Franklin, Lawrence | 26 min |
| Mar 1, 1:30 PM CST | Severe Thunderstorm Warning | MRX | Marion | 45 min |
| Mar 1, 1:39 PM CST | Severe Thunderstorm Warning | HUN | Cullman, Morgan | 36 min |
| Mar 1, 1:41 PM CST | Severe Thunderstorm Warning | JAN | Clay, Lowndes | 34 min |
| Mar 1, 1:41 PM CST | Severe Thunderstorm Warning | HUN | Franklin | 19 min |
| Mar 1, 1:43 PM CST | Severe Thunderstorm Warning | HUN | Jackson | 32 min |
| Mar 1, 1:45 PM CST | Severe Thunderstorm Warning | JAN | Winston | 60 min |
| Mar 1, 2:02 PM CST | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 58 min |
| Mar 1, 2:07 PM CST | Severe Thunderstorm Warning | BMX | Fayette, Lamar | 38 min |
| Mar 1, 2:10 PM CST | Severe Thunderstorm Warning | HUN | Marshall, Morgan | 35 min |
| Mar 1, 2:15 PM CST | Severe Thunderstorm Warning | BMX | Walker, Winston | 45 min |
| Mar 1, 2:19 PM CST | Severe Thunderstorm Warning | HUN | DeKalb, Jackson | 26 min |
| Mar 1, 2:20 PM CST | Severe Thunderstorm Warning | MRX | Blount, Knox, Sevier | 30 min |
| Mar 1, 2:28 PM CST | Severe Thunderstorm Warning | JAN | Noxubee | 22 min |
| Mar 1, 2:35 PM CST | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, McMinn, Meigs, Monroe, Polk | 55 min |
| Mar 1, 2:37 PM CST | Severe Thunderstorm Warning | BMX | Fayette, Walker | 53 min |
| Mar 1, 2:39 PM CST | Severe Thunderstorm Warning | FFC | Catoosa, Dade, Walker, Whitfield | 38 min |
| Mar 1, 2:40 PM CST | Severe Thunderstorm Warning | HUN | DeKalb, Jackson, Marshall | 50 min |
| Mar 1, 2:54 PM CST | Severe Thunderstorm Warning | HUN | Cullman, Marshall | 36 min |
| Mar 1, 2:55 PM CST | Severe Thunderstorm Warning | BMX | Blount | 23 min |
| Mar 1, 3:05 PM CST | Severe Thunderstorm Warning | HUN | Cullman | 25 min |
| Mar 1, 3:10 PM CST | Severe Thunderstorm Warning | MRX | Blount, Monroe | 18 min |
| Mar 1, 3:19 PM CST | Severe Thunderstorm Warning | FFC | Bartow, Chattooga, Floyd, Gordon, Murray | 41 min |
| Mar 1, 3:27 PM CST | Severe Thunderstorm Warning | MRX | Cherokee | 18 min |
| Mar 1, 3:28 PM CST | Severe Thunderstorm Warning | BMX | Jefferson | 47 min |
| Mar 1, 3:46 PM CST | Flash Flood Warning | MRX | Blount, Jefferson, Knox, Loudon, Sevier | 3 hr |
| Mar 1, 3:55 PM CST | Severe Thunderstorm Warning | BMX | Greene, Sumter | 34 min |
| Mar 1, 3:55 PM CST | Severe Thunderstorm Warning | FFC | Bartow, Cherokee, Gordon, Pickens | 50 min |
| Mar 1, 3:58 PM CST | Severe Thunderstorm Warning | FFC | Fannin, Gilmer, Lumpkin, Towns, Union, White | 47 min |
| Mar 1, 4:18 PM CST | Severe Thunderstorm Warning | BMX | Calhoun, St. Clair | 57 min |
| Mar 1, 4:47 PM CST | Severe Thunderstorm Warning | FFC | Dawson, Hall, Lumpkin, White | 43 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
Birmingham, AL (KBMX), launched 12:00Z, 5.8 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
- 246 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 549 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 290 m²/s²
- 0-3 km storm-relative helicity
- 372 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.3
The text
As transmitted.
140
WWUS20 KWNS 011746
SEL7
SPC WW 011746
ALZ000-GAZ000-MSZ000-NCZ000-TNZ000-020000-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 57
NWS Storm Prediction Center Norman OK
1150 AM CST Wed Mar 1 2017
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northern and Central Alabama
Northern Georgia
Central and Northeast Mississippi
Extreme Western North Carolina
Southeast Tennessee
* Effective this Wednesday morning and evening from 1150 AM until
600 PM CST.
* Primary threats include...
A few tornadoes likely
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Thunderstorms will slowly intensify this afternoon along a
boundary extending from northern MS into southeast TN, and spread
across the watch area. Large hail and isolated tornadoes are the
main threats with these storms.
The tornado watch area is approximately along and 60 statute miles
north and south of a line from 40 miles southwest of Greenwood MS to
65 miles east of Chattanooga TN. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU7).
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 55...WW 56...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 25035.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 4:19 AM CST | Mesoscale Discussion | SPC | Lauderdale | 56 min |
| Mar 1, 5:28 AM CST | Mesoscale Discussion | SPC | Lauderdale | 2 hr |
| Mar 1, 10:08 AM CST | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 19 more | 2 hr |
| Mar 1, 2:11 PM CST | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cullman, DeKalb, Etowah and 7 more | 2 hr |
| Mar 1, 2:43 PM CST | Mesoscale Discussion | SPC | Autauga, Chambers, Chilton, Clay, Coosa, Elmore and 3 more | 3 hr |
| Mar 1, 3:43 PM CST | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Chambers, Chilton, Clay, Cleburne and 10 more | 4 hr |
| Mar 1, 5:54 PM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Chambers, Chilton, Choctaw, Clarke and 16 more | 2 hr |
| Mar 1, 1:07 PM CST | Mesoscale Discussion | SPC | Rabun | 113 min |
| Mar 1, 2:02 PM CST | Severe Thunderstorm Watch | SPC | Elbert, Franklin, Habersham, Hart, Rabun, Stephens | 7 hr |
| Mar 1, 2:09 AM CST | Mesoscale Discussion | SPC | DeSoto, Tunica | 2 hr |
| Mar 1, 1:32 PM CST | Mesoscale Discussion | SPC | Adams, Amite, Clarke, Copiah, Covington, Franklin and 14 more | 2 hr |
| Mar 1, 8:44 AM CST | Mesoscale Discussion | SPC | Alamance, Alleghany, Ashe, Caswell, Forsyth, Granville and 8 more | 91 min |
| Mar 1, 9:38 AM CST | Severe Thunderstorm Watch | SPC | Alleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more | 4 hr |
| Mar 1, 11:25 AM CST | Mesoscale Discussion | SPC | Alleghany, Rockingham, Stokes, Surry | 65 min |
| Mar 1, 11:50 AM CST | Mesoscale Discussion | SPC | Gates, Granville, Halifax, Hertford, Northampton, Vance and 1 more | 55 min |
| Mar 1, 5:21 PM CST | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Cabarrus and 40 more | 114 min |
| Feb 28, 7:46 PM CST | Mesoscale Discussion | SPC | Crockett, Dyer, Gibson, Henry, Lake, Lauderdale and 3 more | 119 min |
| Feb 28, 8:29 PM CST | Tornado Watch | SPC | Carroll, Crockett, Dyer, Gibson, Haywood, Henry and 6 more | 12 hr |
| Mar 1, 3:03 AM CST | Tornado Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 5 hr |
| Mar 1, 4:57 AM CST | Tornado Watch | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more | 5 hr |
| Mar 1, 6:47 AM CST | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Campbell, Carter, Claiborne and 23 more | 5 hr |
| Mar 1, 7:28 AM CST | Mesoscale Discussion | SPC | Anderson, Bedford, Bledsoe, Campbell, Cannon, Claiborne and 37 more | 92 min |
Nearby
Tornado Watches in Alabama, 2017Tornado Watches in Mississippi, 2017Tornado Watches in Georgia, 2017Every tornado watch 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.