Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 65, NWS Morristown, TN

August 11, 20268 counties in Tennessee

NWS Morristown, TN issued this flash flood warning at Aug 11, 2026, 11:20 PM CDT for 8 counties in 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: Aug 11, 2026, 11:20 PM CDT (04:20 UTC)
Expired: Aug 12, 2026, 2:15 AM CDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Bledsoe County, TN, Bradley County, TN, Hamilton County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN

The radar

The Northeast Alabama radar (KHTX), 127 km from the middle of the area, began a volume at 04:21 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, 4.3 hours before the alert went out and 183 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: 3410 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1244 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

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 Aug 11, 6:41 PM CDT, 4 hours 39 minutes earlier.

Area forecast discussion, Aug 11, 6:41 PM CDT, 4 hours 39 minutes before

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Hazardous weather outlook, Aug 11, 1:24 PM CDT, 9 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
224 PM EDT Tue Aug 11 2026

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-121830-
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-
224 PM EDT Tue Aug 11 2026 /124 PM CDT Tue Aug 11 2026/

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

.DAY ONE...This Afternoon and Tonight

A few strong to severe storms will be possible this afternoon and
evening, primarily in southwest Virginia and our northern
Tennessee counties. Damaging winds are the primary hazard, but
heavy rain and isolated flash flooding cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

An active, northwest flow pattern will continue through late this
week. This pattern has the potential to produce several rounds of
showers and thunderstorms, especially for our northern counties.
While widespread severe storms aren't likely, some damaging winds
could occur with the stronger storms. In addition to heavy rain
and isolated flash flooding concerns.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time.

BH

In the hours before

Special weather statement, Aug 11, 5:46 PM CDT, 5 hours 34 minutes before

Special Weather Statement
National Weather Service Morristown TN
646 PM EDT Tue Aug 11 2026

TNZ016-042-112315-
Northwest Greene TN-Hawkins TN-
646 PM EDT Tue Aug 11 2026

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL HAWKINS AND NORTH
CENTRAL GREENE COUNTIES THROUGH 715 PM EDT...

At 646 PM EDT, Doppler radar was tracking a strong thunderstorm over
Rogersville, moving southeast at 10 mph.

HAZARD...Wind gusts up to 50 mph and penny 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...
Rogersville, Surgoinsville, Baileyton, Kepler, McCloud, and
Jearoldstown.

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.

&&

LAT...LON 3638 8307 3648 8302 3645 8277 3630 8285
TIME...MOT...LOC 2246Z 294DEG 8KT 3642 8298

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

27

Local storm report, Aug 11, 6:50 PM CDT, 4 hours 30 minutes before

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Local storm report, Aug 11, 6:54 PM CDT, 4 hours 26 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 7:08 PM CDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Hancock, Hawkins, Sullivan, Unicoi and 1 more	67 min
Aug 11, 7:24 PM CDT	Severe Thunderstorm Warning	MRX	Carter, Johnson	47 min
Aug 11, 7:29 PM CDT	Severe Thunderstorm Warning	MRX	Claiborne, Cocke, Grainger, Greene, Hamblen, Hancock and 3 more	61 min
Aug 11, 7:43 PM CDT	Special Weather Statement	MRX	Greene, Unicoi	62 min
Aug 11, 8:00 PM CDT	Special Weather Statement	MRX	Campbell, Scott	60 min
Aug 11, 8:01 PM CDT	Areal Flood Advisory	MRX	Hancock, Hawkins	119 min
Aug 11, 8:17 PM CDT	Special Weather Statement	MRX	Knox	28 min
Aug 11, 8:22 PM CDT	Special Weather Statement	MRX	Cocke, Grainger, Hamblen, Jefferson, Union	53 min
Aug 11, 8:34 PM CDT	Special Weather Statement	MRX	Blount, Knox, Sevier	26 min
Aug 11, 8:38 PM CDT	Areal Flood Advisory	MRX	Knox	22 min
Aug 11, 9:00 PM CDT	Flash Flood Warning	MRX	Blount, Knox	2 hr
Aug 11, 9:15 PM CDT	Areal Flood Advisory	MRX	Blount, Knox, Sevier	2 hr
Aug 11, 9:30 PM CDT	Flash Flood Warning	MRX	Blount, Knox, Sevier	4 hr
Aug 11, 9:51 PM CDT	Areal Flood Advisory	MRX	Knox	114 min
Aug 11, 9:53 PM CDT	Areal Flood Advisory	MRX	Blount	3 hr
Aug 11, 10:18 PM CDT	Areal Flood Advisory	MRX	McMinn, Monroe, Polk	3 hr
Aug 11, 10:34 PM CDT	Flash Flood Warning	MRX	Blount, Knox, Loudon, Monroe, Roane	3 hr
Aug 11, 10:38 PM CDT	Areal Flood Advisory	MRX	Bledsoe, Bradley, Hamilton, McMinn, Meigs, Polk and 1 more	3 hr
Aug 11, 11:14 PM CDT	Areal Flood Advisory	MRX	Blount, Monroe	2 hr
Aug 12, 1:38 AM CDT	Flood Watch	MRX	Anderson, Blount, Campbell, Carter, Claiborne, Cocke and 17 more	29 hr
Aug 12, 9:00 AM CDT	Areal Flood Advisory	MRX	Campbell, Claiborne, Grainger, Hancock, Scott, Union	2 hr

Nearby

Flash Flood Warnings in Tennessee, 2026 Every flash flood warning in 2026

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.