Alert archive / Tennessee / Flash Flood Warnings in 2025

Flash Flood Warning 13, NWS Morristown, TN

April 10, 2025Anderson County, Morgan County, Roane County, Tennessee

NWS Morristown, TN issued this flash flood warning at Apr 10, 2025, 5:22 PM EDT for Anderson County, Morgan County, Roane County, Tennessee. It was in force for 80 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: Apr 10, 2025, 5:22 PM EDT (21:22 UTC)
Expired: Apr 10, 2025, 6:42 PM EDT
In force: 80 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Anderson County, TN, Morgan County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 83 km from the middle of the area, began a volume at 21:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.4 hours before the alert went out and 292 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1911 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

081 
WGUS54 KMRX 102122
FFWMRX
TNC001-129-145-110015-
/O.NEW.KMRX.FF.W.0013.250410T2122Z-250411T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
522 PM EDT Thu Apr 10 2025

The National Weather Service in Morristown has issued a

* Flash Flood Warning for...
  Southwestern Anderson County in east Tennessee...
  Southeastern Morgan County in east Tennessee...
  Northeastern Roane County in east Tennessee...

* Until 815 PM EDT.

* At 522 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Oak Ridge, Clinton, Wartburg, Oliver Springs, Harriman, Oakdale, 
  Coalfield, Petros, Dearmond and Frozen Head State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3618 8472 3607 8409 3606 8409 3599 8417
      3599 8419 3598 8420 3598 8421 3596 8422
      3595 8422 3596 8424 3594 8424 3593 8424
      3594 8426 3594 8427 3592 8425 3591 8427
      3603 8475

FLASH FLOOD...RADAR INDICATED

$$

DGS

1 follow-up statement

320 
WGUS74 KMRX 102242
FFSMRX

Flash Flood Statement
National Weather Service Morristown TN
642 PM EDT Thu Apr 10 2025

TNC001-129-145-102252-
/O.CAN.KMRX.FF.W.0013.000000T0000Z-250411T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Anderson TN-Morgan TN-Roane TN-
642 PM EDT Thu Apr 10 2025

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN ANDERSON, 
SOUTHEASTERN MORGAN AND NORTHEASTERN ROANE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3618 8472 3607 8409 3606 8409 3599 8417
      3599 8419 3598 8420 3598 8421 3596 8422
      3595 8422 3596 8424 3594 8424 3593 8424
      3594 8426 3594 8427 3592 8425 3591 8427
      3603 8475

$$

DGS

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 Apr 10, 2:31 PM EDT, 2 hours 51 minutes earlier.

Area forecast discussion, Apr 10, 2:31 PM EDT, 2 hours 51 minutes before

Area Forecast Discussion
National Weather Service Morristown TN
231 PM EDT Thu Apr 10 2025

...New SHORT TERM, LONG TERM...

.SHORT TERM...
(This evening through Friday)
Issued at 230 PM EDT Thu Apr 10 2025

Key Messages:

1. Showers and thunderstorms this evening, with a few capable of
producing large hail and damaging winds.

2. Scattered to numerous showers continue overnight and tomorrow
with isolated thunderstorms.

Discussion:

Satellite shows extensive clearing has occurred across Middle TN and
the Cumberland Plateau, and cumulus clouds are developing as the
boundary layer mixes. A few taller towers are taking shape, and
this is likely to increase as midlevel lapse rates steepen with
the approach of a mid/upper level trough. By around 4 PM, we
should storms developing quickly where convection can break
through the cap, and supercells are possible given the overlap of
MLCAPE > 1200 J/kg and 0-6 km shear around 70 kt across the
southern Pleateau and southern TN Valley. With low WBZ heights and
midlevel lapse rate of 7.5-8 C/km, large hail will be a threat,
and the inverted-V temp/dewpoint profiles in foreast soundings
point to a damaging wind threat as well. Remanants of storms that
are now taking shape near the MS River will cross our area later
tonight, but should lose intensity with an overnight arrival time
that will greatly reduce CAPE. With the 850-500 mb low over the
area, lapse rates will continue to support scattered to numerous
showers and isolated thunderstorms late tonight into Friday. There
could be some reports of small hail at times given the very low
WBZ heights. Showers will trend downward through the afternoon as
the closed low pulls off to the east of the area.

&&

.LONG TERM...
(Friday night through next Thursday)
Issued at 230 PM EDT Thu Apr 10 2025

Key Messages:

1. Possible widespread frost Sunday morning.

2. Trending dry for the weekend with temperatures increasing into
the beginning of next week.

3. Cold front Tuesday brings next chances of showers.

Discussion:

As this system departs the region early Saturday morning we could
get a very brief round of snow flurries in the higher elevations as
lingering moisture in the lower levels of the atmosphere encounter
sub-freezing temperatures. Accumulations look very minor, especially
with warmer ground temperatures, but some of the peaks of the
mountains could see enough snow to make a snowball, but will
struggle to get more than an inch if the forecast verifies. Clear
skies and calm winds heading into Sunday morning will bring one more
round of frost to much of the eastern Tennessee Valley with a 2-4
hour window just before sunrise on Sunday where frost development is
favorable with temperatures dropping into the 30's.

Rapid warm up during the day on Sunday and continuing into Monday as
ridging and high pressure combine to drive temperatures up about 10
degrees warmer each day and many locations approach 80 degrees
Monday afternoon.

Warm temperatures will not last very long as the next front looks to
move through late Monday or early Tuesday. This will bring another
round of quick showers and storms, but with the fast moving front
and limited moisture availability QPF amounts remain very light,
likely less than 0.25 inches. Cooler weather behind the front with
temperatures expected to hover around the seasonal normals Tuesday,
Wednesday, and Thursday.

&&

.AVIATION...
(18Z TAFS)
Issued at 123 PM EDT Thu Apr 10 2025

Rain at TRI and TYS at the moment will be exiting by 18Z, and
partial clearing will build in behind that. Additional showers and
thunderstorms are expected to develop near the Plateau and move
west through the evening, which will require VCTS and PROB30 for
TS and MVFR vis at all the TAF sites. Later tonight and tomorrow
morning, scattered showers will be around the area with MVFR cigs
prevailing. This will likely persist through the end of the TAF
period as an upper level low sits over the region.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             46  62  41  63 /  60  50  20   0
Knoxville McGhee Tyson Airport, TN  47  58  40  59 /  60  50  20   0
Oak Ridge, TN                       45  59  39  60 /  50  50  10   0
Tri Cities Airport, TN              44  54  38  54 /  60  50  20   0

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...NONE.
VA...NONE.
&&

SHORT TERM...DGS
LONG TERM....99
AVIATION...DGS

Hazardous weather outlook, Apr 10, 2:38 PM EDT, 2 hours 44 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Morristown TN
238 PM EDT Thu Apr 10 2025

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-111845-
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-
238 PM EDT Thu Apr 10 2025 /138 PM CDT Thu Apr 10 2025/

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

.DAY ONE...This Afternoon and Tonight

Severe thunderstorms will be possible this afternoon and evening,
especially across the southern Cumberland Plateau and southern
Tennessee Valley. Large hail and gusty winds will be the primary
hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Light snow accumulation will be possible across the higher
elevations of the mountains on Friday night, mainly above 3000
feet.

.SPOTTER INFORMATION STATEMENT...

Spotter reports may be needed this afternoon and evening due to
the potential of severe thunderstorms.

In the hours before

Special weather statement, Apr 10, 3:33 PM EDT, 1 hour 49 minutes before

Special Weather Statement
National Weather Service Morristown TN
333 PM EDT Thu Apr 10 2025

TNZ035-036-102015-
Anderson TN-Morgan TN-
333 PM EDT Thu Apr 10 2025

...STRONG THUNDERSTORMS WILL IMPACT CENTRAL MORGAN AND WESTERN
ANDERSON COUNTIES THROUGH 415 PM EDT...

At 333 PM EDT, Doppler radar was tracking a cluster of strong
thunderstorms near Wartburg, moving east at 35 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Coalfield, Wartburg, Rosedale, Frozen Head State Park, Petros, Oliver
Springs, and Oak Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3619 8467 3621 8448 3616 8444 3617 8440
      3622 8437 3621 8433 3622 8430 3618 8424
      3618 8423 3624 8423 3624 8418 3597 8423
      3599 8432 3605 8434 3600 8442 3606 8475
TIME...MOT...LOC 1933Z 273DEG 29KT 3610 8468

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

DGS

Special weather statement, Apr 10, 3:39 PM EDT, 1 hour 43 minutes before

Special Weather Statement
National Weather Service Morristown TN
339 PM EDT Thu Apr 10 2025

TNZ012-013-102030-
Scott TN-Campbell TN-
339 PM EDT Thu Apr 10 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN CAMPBELL AND
NORTHEASTERN SCOTT COUNTIES THROUGH 430 PM EDT...

At 339 PM EDT, Doppler radar was tracking a cluster of strong
thunderstorms near Oneida, moving east at 20 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Elk Valley, Royal Blue, La Follette, Jacksboro, Caryville, Winfield,
and Jellico.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3643 8448 3655 8442 3653 8406 3632 8412
TIME...MOT...LOC 1939Z 278DEG 19KT 3648 8440

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

DGS

Special weather statement, Apr 10, 4:15 PM EDT, 1 hour 7 minutes before

Special Weather Statement
National Weather Service Morristown TN
315 PM CDT Thu Apr 10 2025

TNZ098-102100-
Marion TN-
315 PM CDT Thu Apr 10 2025

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL MARION COUNTY THROUGH
400 PM CDT...

At 315 PM CDT, Doppler radar was tracking a strong thunderstorm near
Monteagle, or 12 miles northwest of Jasper, moving east at 40 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Kimball, Martin Springs, Jasper, Fiery Gizzard State Park, Sequatchie
Cave, Foster Falls State Park, Haletown (guild), Hicks Gap State
Park, Monteagle, and Powells Crossroads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3524 8584 3522 8577 3522 8572 3515 8540
      3515 8539 3511 8539 3509 8536 3507 8536
      3504 8539 3504 8541 3500 8543 3499 8546
      3508 8586 3522 8586 3522 8587
TIME...MOT...LOC 2015Z 283DEG 36KT 3515 8583

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

27

Special weather statement, Apr 10, 4:17 PM EDT, 1 hour 5 minutes before

Special Weather Statement
National Weather Service Morristown TN
417 PM EDT Thu Apr 10 2025

TNZ035-036-067-102100-
Anderson TN-Roane TN-Morgan TN-
417 PM EDT Thu Apr 10 2025

...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN MORGAN...
SOUTHWESTERN ANDERSON AND NORTHEASTERN ROANE COUNTIES THROUGH 500 PM
EDT...

At 417 PM EDT, Doppler radar was tracking a cluster of strong
thunderstorms near Wartburg, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Coalfield, Frozen Head State Park, Petros, Oliver Springs, Oak Ridge,
Wartburg, and Clinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3603 8460 3616 8455 3615 8413 3599 8420
      3598 8419 3598 8421 3596 8422 3595 8421
      3594 8422 3596 8424 3595 8425 3593 8424
      3594 8427 3592 8426
TIME...MOT...LOC 2017Z 279DEG 22KT 3607 8451

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

DGS

Special weather statement, Apr 10, 4:25 PM EDT, 57 minutes before

Special Weather Statement
National Weather Service Morristown TN
425 PM EDT Thu Apr 10 2025

TNZ012-035-102115-
Scott TN-Morgan TN-
425 PM EDT Thu Apr 10 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN MORGAN AND SOUTHWESTERN
SCOTT COUNTIES THROUGH 515 PM EDT...

At 425 PM EDT, Doppler radar was tracking a cluster of strong
thunderstorms 13 miles southeast of Jamestown, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Rugby State Park, Deerlodge, Wartburg, Elgin, Frozen Head State Park,
Slick Rock, and Sunbright.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3629 8485 3629 8484 3630 8482 3630 8480
      3632 8479 3633 8477 3633 8475 3635 8474
      3635 8473 3636 8473 3631 8441 3608 8455
      3626 8488
TIME...MOT...LOC 2025Z 292DEG 23KT 3628 8478

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

DGS

Local storm report, Apr 10, 4:39 PM EDT, 43 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
439 PM EDT Thu Apr 10 2025

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

0431 PM     Hail             4 SE Wartburg           36.06N 84.53W
04/10/2025  E1.00 Inch       Morgan             TN   Public

            Report from mPING: Quarter (1.00 in.).

0432 PM     Hail             4 NE Deerlodge          36.25N 84.74W
04/10/2025  E0.75 Inch       Morgan             TN   Public

            Report from mPING: Dime (0.75 in.).

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 3:33 PM EDT	Special Weather Statement	MRX	Morgan	42 min
Apr 10, 3:39 PM EDT	Special Weather Statement	MRX	Campbell	51 min
Apr 10, 4:15 PM EDT	Special Weather Statement	MRX	Marion	45 min
Apr 10, 4:17 PM EDT	Special Weather Statement	MRX	Anderson	43 min
Apr 10, 4:25 PM EDT	Special Weather Statement	MRX	Morgan	50 min
Apr 10, 4:33 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	19 min
Apr 10, 4:34 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Morgan, Roane	30 min
Apr 10, 4:39 PM EDT	Severe Thunderstorm Warning	MRX	Marion	51 min
Apr 10, 4:49 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Sequatchie	44 min
Apr 10, 4:52 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Morgan, Roane	29 min
Apr 10, 5:07 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox	53 min
Apr 10, 5:08 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, McMinn, Meigs, Monroe, Rhea, Roane	55 min
Apr 10, 5:14 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Roane	30 min
Apr 10, 5:21 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Monroe, Polk	54 min
Apr 10, 5:31 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Bradley, Hamilton, Meigs, Sequatchie	44 min
Apr 10, 5:37 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Sevier	53 min
Apr 10, 5:46 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Loudon, Monroe	18 min
Apr 10, 5:48 PM EDT	Special Weather Statement	MRX	McMinn	42 min
Apr 10, 6:06 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon	29 min
Apr 10, 6:08 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Monroe, Polk	39 min
Apr 10, 6:16 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	29 min
Apr 10, 6:33 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	42 min
Apr 10, 6:37 PM EDT	Special Weather Statement	MRX	Marion	23 min
Apr 10, 7:48 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Meigs, Rhea	57 min

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.