Alert archive / Tennessee / Special Weather Statements in 2020
Special Weather Statement, NWS Nashville, TN
NWS Nashville, TN issued this special weather statement at Jul 21, 2020, 7:13 PM CDT for Cannon County, Tennessee. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2020, 7:13 PM CDT (00:13 UTC)
- Expired
- Jul 21, 2020, 7:45 PM CDT
- In force
- 32 min
- Issued by
- NWS Nashville, TN
County Cannon County, TN
The radar
The Nashville radar (KOHX), 52 km from the middle of the area, began a volume at 00:14 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.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 0.2 hours before the alert went out and 49 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
- 669 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1684 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Nashville, TN wrote its last area forecast discussion before this special weather statement went out at Jul 21, 7:08 PM CDT, 5 minutes earlier.
Area forecast discussion, Jul 21, 7:08 PM CDT, 5 minutes before
Area Forecast Discussion National Weather Service Nashville TN 708 PM CDT Tue Jul 21 2020 .UPDATE... FOR EVENING DISCUSSION. && .DISCUSSION... Will opt to delay the decreasing pops as isol to sct coverage persists. Hrrr wants to hold on to the activity into the evening and given the current cape values this looks believable. This evenings upper divergence appears to shift over eastern areas by 03Z and so the best shot of convection holding on is across that area. Otw, overnight lows still look acceptable. No other changes. && .AVIATION... 00Z TAF DISCUSSION. Isolated to scattered convection again in place across middle TN this afternoon. A weakening shortwave axis will be on approach tomorrow and thus, afternoon coverage will be greater as compared with today's activity. Otw, tover values are running positive this afternoon and so for the overnight, just light fog will again be possible, particularly for areas where rainfall occurred earlier. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......11 AVIATION........21
Hazardous weather outlook, Jul 21, 5:08 AM CDT, 14 hours 5 minutes before
Hazardous Weather Outlook National Weather Service Nashville TN 508 AM CDT Tue Jul 21 2020 TNZ005>011-023>034-056>066-075-077>080-093>095-221015- Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston- Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson- Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury- Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee- Warren-Grundy-Van Buren-Wayne-Lawrence-Giles- 508 AM CDT Tue Jul 21 2020 This Hazardous Weather Outlook is for Middle Tennessee. .DAY ONE...Today and tonight. Strong thunderstorms are possible across Middle Tennessee this afternoon. Wind gusts of 40 to 50 mph are the main concern, along with locally heavy rainfall. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Strong thunderstorms are possible across Middle Tennessee on Wednesday. Wind gusts of 40 to 50 mph are the main concern, along with locally heavy rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. 08
In the hours before
Special weather statement, Jul 21, 6:22 PM CDT, 51 minutes before
Special Weather Statement National Weather Service Nashville TN 622 PM CDT Tue Jul 21 2020 TNZ063-064-078-220000- Cannon TN-De Kalb TN-Warren TN- 622 PM CDT Tue Jul 21 2020 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DE KALB...NORTHWESTERN WARREN AND NORTHEASTERN CANNON COUNTIES UNTIL 700 PM CDT... At 622 PM CDT, Doppler radar was tracking a strong thunderstorm 7 miles east of Woodbury, moving north at 10 mph. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Smithville, Woodbury and Auburntown. LAT...LON 3577 8577 3578 8606 3596 8609 3596 8569 TIME...MOT...LOC 2322Z 191DEG 8KT 3583 8594 13
Special weather statement, Jul 21, 6:25 PM CDT, 48 minutes before
Special Weather Statement
National Weather Service Nashville TN
625 PM CDT Tue Jul 21 2020
TNZ034-066-220015-
Cumberland TN-Fentress TN-
625 PM CDT Tue Jul 21 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL CUMBERLAND AND
SOUTHWESTERN FENTRESS COUNTIES UNTIL 715 PM CDT...
At 625 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles north of Crossville, moving north at 15 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Fairfield Glade, Grimsley, Slate Springs and Clarkrange.
This includes Interstate 40 between mile markers 315 and 316.
LAT...LON 3600 8490 3601 8509 3623 8508 3630 8497
3621 8493 3608 8490
TIME...MOT...LOC 2325Z 172DEG 11KT 3611 8505
13Special weather statement, Jul 21, 6:37 PM CDT, 36 minutes before
Special Weather Statement
National Weather Service Nashville TN
637 PM CDT Tue Jul 21 2020
TNZ093>095-220015-
Lawrence TN-Wayne TN-Giles TN-
637 PM CDT Tue Jul 21 2020
...SIGNIFICANT WEATHER ADVISORY FOR WAYNE...LAWRENCE AND WESTERN
GILES COUNTIES UNTIL 715 PM CDT...
At 636 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Walnut Grove to Pulaski. Movement was
north at 15 mph.
Winds in excess of 40 mph will be possible with these storms.
Locations impacted include...
Lawrenceburg, Pulaski, Waynesboro, Loretto, Collinwood, St. Joseph,
Minor Hill, Ethridge, Cypress Inn, Lutts, Goodspring, Leoma,
Westpoint, Iron City and Prospect.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3501 8798 3529 8798 3530 8802 3533 8802
3535 8800 3536 8706 3499 8695
TIME...MOT...LOC 2336Z 164DEG 15KT 3505 8795 3506 8706
13Special weather statement, Jul 21, 6:58 PM CDT, 15 minutes before
Special Weather Statement National Weather Service Nashville TN 658 PM CDT Tue Jul 21 2020 TNZ028-062-220045- Rutherford TN-Wilson TN- 658 PM CDT Tue Jul 21 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL RUTHERFORD AND SOUTHWESTERN WILSON COUNTIES UNTIL 745 PM CDT... At 657 PM CDT, Doppler radar was tracking a strong thunderstorm near Walterhill, or 11 miles north of Murfreesboro, moving north at 15 mph. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Smyrna, Walterhill, Rural Hill, Cedars Of Lebanon State Park and Gladeville. This includes Interstate 840 between mile markers 58 and 71. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3593 8632 3595 8648 3613 8651 3613 8627 TIME...MOT...LOC 2357Z 182DEG 11KT 3602 8642 13
Special weather statement, Jul 21, 7:00 PM CDT, 13 minutes before
Special Weather Statement National Weather Service Nashville TN 700 PM CDT Tue Jul 21 2020 TNZ061-075-220030- Bedford TN-Marshall TN- 700 PM CDT Tue Jul 21 2020 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARSHALL AND WESTERN BEDFORD COUNTIES UNTIL 730 PM CDT... At 700 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Lewisburg to near Shelbyville. Movement was north at 10 mph. Winds in excess of 40 mph will be possible with these storms. Locations impacted include... Shelbyville, Lewisburg, Chapel Hill, Bell Buckle, Belfast, Deason, Farmington and Unionville. This includes Interstate 65 near mile marker 32. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3564 8679 3561 8635 3540 8643 3543 8689 TIME...MOT...LOC 0000Z 193DEG 11KT 3550 8679 3548 8650 13
Special weather statement, Jul 21, 7:13 PM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:00 PM CDT | Special Weather Statement | OHX | Bedford, Marshall | 30 min |
| Jul 21, 7:22 PM CDT | Special Weather Statement | OHX | Fentress | 38 min |
| Jul 21, 7:31 PM CDT | Special Weather Statement | OHX | Bedford | 44 min |
| Jul 21, 7:44 PM CDT | Special Weather Statement | OHX | Marshall | 46 min |
| Jul 21, 8:06 PM CDT | Special Weather Statement | OHX | Wilson | 24 min |
| Jul 21, 8:18 PM CDT | Areal Flood Advisory | OHX | Cumberland, Fentress, Overton, Pickett | 117 min |
| Jul 21, 8:20 PM CDT | Special Weather Statement | OHX | Williamson | 25 min |
| Jul 21, 8:40 PM CDT | Special Weather Statement | OHX | Macon, Trousdale | 35 min |
| Jul 21, 8:52 PM CDT | Special Weather Statement | OHX | Williamson | 23 min |
| Jul 21, 8:53 PM CDT | Flash Flood Warning | OHX | Fentress, Overton, Pickett | 3 hr |
| Jul 21, 9:07 PM CDT | Areal Flood Advisory | OHX | Rutherford, Wilson | 113 min |
| Jul 21, 9:21 PM CDT | Special Weather Statement | OHX | Clay | 24 min |
| Jul 22, 12:02 PM CDT | Special Weather Statement | OHX | Davidson | 28 min |
| Jul 22, 1:21 PM CDT | Special Weather Statement | OHX | Davidson | 24 min |
| Jul 22, 2:42 PM CDT | Special Weather Statement | OHX | DeKalb | 18 min |
| Jul 22, 4:11 PM CDT | Areal Flood Advisory | OHX | Robertson | 2 hr |
| Jul 22, 4:51 PM CDT | Special Weather Statement | OHX | Warren | 24 min |
| Jul 22, 6:29 PM CDT | Areal Flood Advisory | OHX | Perry | 2 hr |
Nearby
Special Weather Statements in Tennessee, 2020Every special weather statement in 2020
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.