Alert archive / Tennessee / Flash Flood Warnings in 2025

Flash Flood Warning 43, NWS Morristown, TN

July 18, 2025Sequatchie County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 18, 2025, 6:48 PM CDT for Sequatchie County, Tennessee. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 18, 2025, 6:48 PM CDT (23:48 UTC)
Expired: Jul 18, 2025, 9:45 PM CDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

County Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 78 km from the middle of the area, began a volume at 23:48 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 12:00Z, 11.8 hours before the alert went out and 137 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1771 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this flash flood warning went out at Jul 18, 12:19 PM CDT, 6 hours 29 minutes earlier.

Area forecast discussion, Jul 18, 12:19 PM CDT, 6 hours 29 minutes before

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Hazardous weather outlook, Jul 18, 12:34 PM CDT, 6 hours 14 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Morristown TN
134 PM EDT Fri Jul 18 2025

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-191745-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-Northwest Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott VA-Russell-Washington VA-
134 PM EDT Fri Jul 18 2025 /1234 PM CDT Fri Jul 18 2025/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...This Afternoon and Tonight

Scattered to numerous storms are expected again this afternoon
and evening, with the best coverage expected to be north of
Interstate 40. Heavy downpours over already saturated ground and
repetitive rounds of rain over the same locations may lead to
flash flooding this afternoon and evening. A Flood Watch is in
effect for SW Virginia and many northern Tennessee Counties near
the Kentucky and Virginia borders through this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Daily chances for storms will continue into early next week, with
some storms capable of producing strong wind gusts and localized
flooding. Areas that have received excessive rainfall over the
past few days will continue to be at risk for flash flooding
through at least the weekend.

Heat index values will reach around or just over 100 across many
TN Valley locations through next week.

.SPOTTER INFORMATION STATEMENT...

Spotter reports of wind damage and flooding are appreciated.

In the hours before

Special weather statement, Jul 18, 3:39 PM CDT, 3 hours 9 minutes before

Special Weather Statement
National Weather Service Morristown TN
439 PM EDT Fri Jul 18 2025

VAZ001-002-005-182130-
Scott VA-Wise VA-Lee VA-
439 PM EDT Fri Jul 18 2025

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN LEE...CENTRAL SCOTT
AND WISE COUNTIES AND THE CITY OF NORTON THROUGH 530 PM EDT...

At 439 PM EDT, Doppler radar was tracking a strong thunderstorm near
Maggard, or 8 miles south of Whitesburg, moving southeast at 20 mph.

HAZARD...Wind gusts up to 45 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Norton, Wise, Big Stone Gap, Coeburn, Appalachia, Dungannon, Jasper,
Fort Blackmore, and Pardee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

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 3705 8249 3702 8247 3697 8237 3664 8260
      3685 8301 3687 8291 3690 8287 3691 8287
      3693 8286 3695 8286 3698 8287 3699 8284
      3701 8283 3701 8278 3703 8275 3704 8274
      3705 8272 3710 8272
TIME...MOT...LOC 2039Z 305DEG 17KT 3699 8282

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

DH

Local storm report, Jul 18, 3:50 PM CDT, 2 hours 58 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
450 PM EDT Fri Jul 18 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     Flash Flood      6 N Castlewood          36.97N 82.29W
07/18/2025                   Russell            VA   911 Call Center

            Evacuations and water rescues ongoing in the
            community of Dante.

&&

Local storm report, Jul 18, 4:13 PM CDT, 2 hours 35 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
513 PM EDT Fri Jul 18 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0424 PM     Flash Flood      5 N Saint Paul          36.98N 82.30W
07/18/2025                   Russell            VA   Public

            Social media reports of multiple mudslides
            and trees down with picture evidence.

&&

KS

Special weather statement, Jul 18, 5:13 PM CDT, 1 hour 35 minutes before

Special Weather Statement
National Weather Service Morristown TN
513 PM CDT Fri Jul 18 2025

TNZ081-182300-
Sequatchie TN-
513 PM CDT Fri Jul 18 2025

...A STRONG THUNDERSTORM WILL IMPACT SEQUATCHIE COUNTY THROUGH 600 PM
CDT...

At 513 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Dunlap, moving south at 5 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Dunlap and Cagle.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

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 3553 8559 3555 8550 3555 8543 3553 8543
      3552 8541 3550 8541 3545 8535 3529 8534
      3531 8556 3534 8554 3536 8551 3541 8549
      3541 8551 3542 8551 3543 8554 3549 8554
      3552 8559
TIME...MOT...LOC 2213Z 005DEG 6KT 3548 8549

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

DH

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 17, 7:08 PM CDT	Special Weather Statement	MRX	Cocke	52 min
Jul 17, 7:13 PM CDT	Special Weather Statement	MRX	Hawkins	47 min
Jul 17, 7:48 PM CDT	Special Weather Statement	MRX	Greene	42 min
Jul 17, 8:00 PM CDT	Special Weather Statement	MRX	Sullivan	45 min
Jul 17, 10:32 PM CDT	Areal Flood Advisory	MRX	Scott	3 hr
Jul 18, 12:01 AM CDT	Areal Flood Advisory	MRX	Greene, Hamblen, Jefferson	3 hr
Jul 18, 5:13 PM CDT	Special Weather Statement	MRX	Sequatchie	47 min
Jul 18, 6:05 PM CDT	Areal Flood Advisory	MRX	Sequatchie	3 hr
Jul 17, 7:41 PM CDT	Special Weather Statement	MRX	Washington	34 min
Jul 17, 8:00 PM CDT	Areal Flood Advisory	MRX	Russell	3 hr
Jul 17, 8:09 PM CDT	Special Weather Statement	MRX	Russell	51 min
Jul 17, 8:21 PM CDT	Flash Flood Warning	MRX	Russell	4 hr
Jul 17, 9:15 PM CDT	Special Weather Statement	MRX	Wise, City of Norton	60 min
Jul 17, 9:42 PM CDT	Severe Thunderstorm Warning	MRX	Lee, Russell, Scott, Wise, City of Norton	43 min
Jul 18, 2:06 PM CDT	Areal Flood Advisory	MRX	Russell	3 hr
Jul 18, 2:49 PM CDT	Areal Flood Advisory	MRX	Wise	2 hr
Jul 18, 3:39 PM CDT	Special Weather Statement	MRX	Scott, Wise, City of Norton	51 min
Jul 18, 3:46 PM CDT	Flash Flood Warning Considerable damage threat	MRX	Russell, Wise	7 hr
Jul 18, 4:42 PM CDT	Areal Flood Advisory	MRX	Wise, City of Norton	3 hr

Nearby

Flash Flood Warnings in Tennessee, 2025 Every flash flood warning in 2025

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.