Scattered showers and thunderstorms, including some supercells, developed across Middle Tennessee during the evening hours on July 31 and moved southeastward. Numerous reports of damaging winds and flash flooding were received.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OHX wrote it up.
Scattered showers and thunderstorms, including some supercells, developed across Middle Tennessee during the evening hours on July 31 and moved southeastward. Numerous reports of damaging winds and flash flooding were received.
The local office's own words before the first event, 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 the first event at Jul 31, 5:27 PM CST, 45 minutes earlier.
Area Forecast Discussion National Weather Service Nashville TN 627 PM CDT Sat Jul 31 2021 .UPDATE... FOR 00Z AVIATION DISCUSSION. && .DISCUSSION... Hot and sticky once again across Middle TN. While many west of the Cumberland Plateau are seeing Heat Index values close to triple digits, it's our southwest counties that are getting sauna-ized (technical jargon) with values close to 110 degrees. 75 to 79 degree dew points will do that, so the Heat Advisory continues until 6 pm. That said, it's starting to look like there could be some brief relief in the way of isolated showers and thunderstorms starting to develop. Models haven't handled today well, at all (seems to be a running theme lately). An outflow boundary in Illinois from an earlier MCS has pushed as far south as the TN-KY state line and is starting to interact with 5000+ J/Kg CAPE west of I-65. I don't have a lot to go on other than to say, these storms COULD continue to grow over the next couple of hours, based on environmental conditions. I have added some afternoon PoPs to the forecast package to account for this potential. I still think the focus is on the evening/overnight hours. If there's anything models have been consistent about is the idea that showers and thunderstorms will develop and move into Middle TN prior to midnight. In my opinion, these are the ones we're going to have to watch closely. Forecast soundings continue to exhibit an uptick in shear values and while they're not off the chart (25-30 kts of deep layer shear and a little helicity), it's more than we usually see in the summer. Because of the instability that will be in place due to diurnal heating, the combination of the two could lead to a couple of strong to severe storms overnight. In addition, 2 inch+ PW values would suggest very heavy rainfall with any of these storms, so localized flooding could become an issue for any area that sees training storms. Bottom line is, if you have outdoor plans this afternoon/evening, please be sure to remain weather aware. The boundary responsible for the overnight storms will likely become the instigator for storms tomorrow morning/afternoon south of I-40. While a couple could be strong, a combination of cloud cover and low shear values should keep most everything under severe criteria. The cloud cover will also keep temperatures down tomorrow. In fact, tomorrow's highs are in the 80s for the first time since July 19th and this should be the start of a streak of days in the 80s at least through Thursday. An upper level low over the eastern half of the U.S. could bring afternoon thunderstorms to the Plateau throughout the week, so keep that in mind, but PoPs remain low. && .AVIATION... 00Z TAF DISCUSSION. Capped atmosphere beginning to give way to some added forcing in the northwest. Will include a vcts group for CKV initially. Otw, vcts will be utilized within the next few hours for the taf sites. An MCS will be pushing southeastward toward the taf sites later this evening. Shower and thunderstorms will become more widespread generally after 03Z. Cigs aob 3 kft will be commonplace with the increased precipitation coverage. Atmosphere will stabilize with just rain showers expected aft 10Z. The precipitation should end from north to south aft 18Z. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......Unger AVIATION........21
Hazardous Weather Outlook National Weather Service Nashville TN 501 AM CDT Sat Jul 31 2021 TNZ005>011-023>034-056>066-075-077>080-093>095-011015- 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- 501 AM CDT Sat Jul 31 2021 This Hazardous Weather Outlook is for Middle Tennessee. .DAY ONE...Today and tonight. A Heat Advisory continues this afternoon for counties south of I-40 and west of I-65. Heat Index values around 106 are expected. Some strong to severe thunderstorms may be possible late Saturday afternoon through the early morning hours Sunday. Main concerns with any strong thunderstorm development will be gusty strong winds as well as heavy rainfall which could lead to localized flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Some showers and a few thunderstorms in the morning Sunday may produce heavy rain and localized flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. 06
Special Weather Statement National Weather Service Nashville TN 617 PM CDT Sat Jul 31 2021 TNZ006-010000- Montgomery TN- 617 PM CDT Sat Jul 31 2021 ...SIGNIFICANT WEATHER ADVISORY FOR MONTGOMERY COUNTY UNTIL 700 PM CDT... At 616 PM CDT, Doppler radar was tracking two strong thunderstorms, one near Woodlawn, and another over northeast Clarksville. Both storms were moving east-southeast at 20 mph. Pea size hail and winds in excess of 40 mph will be possible with these storms. Locations impacted include... Clarksville, Palmyra, Cunningham and Woodlawn. This includes Interstate 24 between mile markers 1 and 12. LAT...LON 3636 8726 3644 8761 3664 8764 3664 8713 TIME...MOT...LOC 2316Z 278DEG 18KT 3654 8759 Shamburger
Special Weather Statement
National Weather Service Nashville TN
647 PM CDT Sat Jul 31 2021
TNZ006-007-010015-
Robertson TN-Montgomery TN-
647 PM CDT Sat Jul 31 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MONTGOMERY AND
WESTERN ROBERTSON COUNTIES UNTIL 715 PM CDT...
At 646 PM CDT, Doppler radar was tracking a strong thunderstorm near
Port Royal, or 11 miles east of Clarksville, moving east-southeast
at 20 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Springfield, Clarksville, Coopertown, Adams and Cedar Hill.
This includes Interstate 24 between mile markers 10 and 18.
LAT...LON 3660 8680 3639 8692 3639 8694 3651 8724
3661 8720
TIME...MOT...LOC 2346Z 286DEG 17KT 3654 8714
ShamburgerSpecial Weather Statement
National Weather Service Nashville TN
658 PM CDT Sat Jul 31 2021
TNZ006-010030-
Montgomery TN-
658 PM CDT Sat Jul 31 2021
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MONTGOMERY COUNTY UNTIL
730 PM CDT...
At 657 PM CDT, Doppler radar was tracking a strong thunderstorm
over Fort Campbell, moving southeast at 25 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Clarksville and Woodlawn.
This includes Interstate 24 between mile markers 6 and 15.
LAT...LON 3653 8712 3635 8727 3635 8728 3654 8758
3664 8748 3664 8741
TIME...MOT...LOC 2357Z 302DEG 23KT 3656 8746
ShamburgerSpecial Weather Statement National Weather Service Nashville TN 707 PM CDT Sat Jul 31 2021 TNZ007-026-027-010030- Robertson TN-Davidson TN-Cheatham TN- 707 PM CDT Sat Jul 31 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL DAVIDSON... NORTHEASTERN CHEATHAM AND SOUTHWESTERN ROBERTSON COUNTIES UNTIL 730 PM CDT... At 707 PM CDT, Doppler radar was tracking a strong thunderstorm near Coopertown, or 11 miles west of Springfield, moving east at 30 mph. Pea size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Springfield, Greenbrier, Coopertown, Ridgetop, Joelton and Pleasant View. This includes Interstate 24 between mile markers 19 and 39. LAT...LON 3648 8673 3628 8681 3637 8714 3652 8710 TIME...MOT...LOC 0007Z 287DEG 27KT 3643 8706 Shamburger
The Nashville radar (KOHX), 40 km away, was scanning. The volume nearest the first event began at 00:13 UTC.
17 thunderstorm wind, 3 flash flood. Local standard time, as filed.
Multiple trees were blown down onto power lines.
A few trees were blown down in the southeastern portions of the county.
Trees and powerlines were blown down along Highway 49.
Trees were blown down onto power lines.
A Twitter tSpotter report indicated a tree was blown down at the entrance of Shelby Park on 19th Street.
Several trees were blown down in Bells Bend between 3964 and 4001 Old Hickory Blvd.
Numerous trees and power lines were blown down across southern Davidson County. Trees were reported down on Lone Oak Road at Overhill Drive, Otter Creek Road at Granny White Pike, Bramble Wood Drive at Monterey Drive, 407 Lynnwood Blvd, 1718 25th Avenue N, and 3907 Trimble Road. Power lines were reported down on Highway 70 at I-40, Lynnwood Blvd at Abbott Martin Road, and Plymouth Avenue at Brush Hill Road.
A Twitter tSpotter report inidicated multiple trees were blown down on Lealand Lane between Battery Lane and Stonewall Drive.
A small but severe 1.4 mile long by 0.6 mile wide microburst struck the Oak Hill area from the northeast side of Radnor Lake State Park eastward to I-65. The worst damage occurred in neighborhoods along Franklin Pike between Tyne Blvd and Hogan Road, where dozens of trees were uprooted and two homes were destroyed by fallen trees crushing them. Based on radar data and damage photos, winds were estimated up to 65 mph.
Trees and power lines were blown down with power outages.
A tree was blown down in Burns.
A tree was blown down into the road on Spencer Mill Road near Deal Road.
Two feet of flood water was reported covering the intersection of 3rd Street at Crutcher Road in East Nashville.
Trees were blown down along Fitzroy Circle at Stewart Campbell Point.
A Twitter tSpotter report indicated a tree was blown down onto the roof of a house in the 6900 block of Flat Creek Road. Other trees and power lines were also blown down in the area.
Dispatch report indicated multiple trees were blown down in Linden and Lobelville.
A large tree was blown down on Belmont Avenue.
Charlotte Pike at American Road was flooded and impassable.
Significant flash flooding was reported across southern portions of Nashville. Numerous roads were flooded and closed including Sawyer Brown Road at the railroad underpass, Old Hickory Blvd at Health Park Drive, I-24 West at I-40, Charlotte Avenue at I-40 East, and Hogan Road at Regent Drive. In addition, Richland Creek in Belle Meade at Harding Place reached moderate flood stage with considerable flooding reported along the creek.
A large tree was blown down blocking Alvin Coker Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2021Every state in 2021This day in weather historyWarnings in Tennessee, July 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 976550, 976551, 976552, 977252, 976573, 976554, 976567, 976556, 976555, 976569, 976570, 976571, 976572, 976574, 976576, 976581, 976579, 976578, 976583, 976582.