Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 41, NWS Morristown, TN

July 13, 2026Hancock County, Hawkins County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 13, 2026, 1:02 AM EDT for Hancock County, Hawkins 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 outline as issued.

The facts

Issued: Jul 13, 2026, 1:02 AM EDT (05:02 UTC)
Expired: Jul 13, 2026, 4:00 AM EDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Hancock County, TN, Hawkins County, TN

The radar

The Knoxville radar (KMRX), 38 km from the middle of the area, began a volume at 05:02 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 5.0 hours before the alert went out and 300 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: 302 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

734 
WGUS54 KMRX 130502
FFWMRX
TNC067-073-130800-
/O.NEW.KMRX.FF.W.0041.260713T0502Z-260713T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
102 AM EDT Mon Jul 13 2026

The National Weather Service in Morristown has issued a

* Flash Flood Warning for...
  Central Hancock County in east Tennessee...
  West Central Hawkins County in east Tennessee...

* Until 400 AM EDT.

* At 102 AM 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 indicated.

  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...
  Sneedville, Treadway, Evanston and Klondike.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3641 8321 3644 8331 3650 8330 3651 8330
      3657 8327 3654 8311 3650 8311 3641 8313
      3640 8316

FLASH FLOOD...RADAR INDICATED

$$

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 12, 7:41 PM EDT, 5 hours 21 minutes earlier. Its key messages:

Updated at 738 PM EDT Sun Jul 12 2026
Isolated to scattered showers and storms continue through Monday. A Flood watch remains in effect into tonight, but may be extended later into Monday.
Though chances are very low, cannot rule out a strong gusty wind or two in any stronger thunderstorm.
More typical summer weather Wednesday onwards with normal temperatures and only a low PM chance of thunderstorms.

Area forecast discussion, Jul 12, 7:41 PM EDT, 5 hours 21 minutes before

Area Forecast Discussion
National Weather Service Morristown TN
741 PM EDT Sun Jul 12 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 738 PM EDT Sun Jul 12 2026

- Isolated to scattered showers and storms continue through
  Monday. A Flood watch remains in effect into tonight, but may
  be extended later into Monday.

- Though chances are very low, cannot rule out a strong gusty
  wind or two in any stronger thunderstorm.

- More typical summer weather Wednesday onwards with normal
  temperatures and only a low PM chance of thunderstorms.

&&

.DISCUSSION...
Issued at 204 PM EDT Sun Jul 12 2026

Isolated to scattered showers and storms are expected the rest of
today and into tonight as an upper level low rotates across the
region. PWs remain high, around 2 inches, and moderate to locally
heavy rainfall is expected across some locations. NAM soundings
also support efficient rainfall process with tall skinny CAPE
profiles, and a warm layer cloud depth of over 10k feet, though
0-6km bulk shear is on the weaker side at around 15 to 20kts.
Nonetheless, isolated 1 to 3 inch rainfall amounts are possible
for a few localized areas through this evening. If these amounts
overlap with areas that have already seen flooding, additional
flooding will be much quicker to occur. Areas that have seen
little rainfall over the past few days can likely handle these
higher end amounts with fewer problems.

Current Flood Watch goes through 2 AM EDT Monday. Currently, do
not have the confidence to extend the watch. Could there be
additional issues overnight, yes. However, confidence in this
outcome is very low due to the expected isolated nature of
remaining showers or storms. Will leave the Flood Watch as is for
now.

Additional isolated to scattered showers and storms are expected
on Monday as the low remains overhead. As with today, additional
flooding is possible on Monday if any heavier rains occur already
saturated grounds.

We begin to dry out Monday night as the low takes a jog to our
south and southwest, but additional isolated to scattered showers
and storms are expected on Tuesday across our southern areas due
to the vicinity of these areas to the upper low to our south.
Drier conditions, but still with chances of some diurnal daily
convection, are expected beyond Tuesday and through the remainder
of the week.

&&

.AVIATION...
(00Z TAFS)
Issued at 738 PM EDT Sun Jul 12 2026

A line of showers and thunderstorms is slowly pivoting around a
surface low to the west. Brief reductions in VIS possible,
primarily at TYS, over the next few hours. After that, uncertainty
increases regarding spread of convective activity, but a lull is
fairly likely overnight with only isolated showers. Ceilings are
likely to dip tonight, though not totally confident on extent of
degradations in the valley. A return to VFR should occur after
sunrise tomorrow morning, with another day of scattered showers
and TS around, mainly after 16z.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             70  83  70  83 /  80  90  60  90
Knoxville McGhee Tyson Airport, TN  69  83  68  85 /  70  80  20  60
Oak Ridge, TN                       68  83  67  85 /  70  80  20  40
Tri Cities Airport, TN              66  80  64  85 /  50  70  20  10

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...Flood Watch until 2 AM EDT Monday for Cherokee-Clay.

TN...Flood Watch until 2 AM EDT /1 AM CDT/ Monday for Anderson-
     Bledsoe-Blount Smoky Mountains-Bradley-Campbell-Claiborne-
     Cocke Smoky Mountains-East Polk-Grainger-Hamblen-Hamilton-
     Hancock-Hawkins-Jefferson-Johnson-Knox-Loudon-Marion-McMinn-
     Meigs-Morgan-North Sevier-Northwest Blount-Northwest Carter-
     Northwest Cocke-Northwest Greene-Northwest Monroe-Rhea-
     Roane-Scott TN-Sequatchie-Sevier Smoky Mountains-Southeast
     Carter-Southeast Greene-Southeast Monroe-Sullivan-Unicoi-
     Union-Washington TN-West Polk.

VA...Flood Watch until 2 AM EDT Monday for Lee-Russell-Scott VA-
     Washington VA-Wise.

&&

DISCUSSION...99
AVIATION...Wellington

Hazardous weather outlook, Jul 13, 12:57 AM EDT, 5 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
1257 AM EDT Mon Jul 13 2026

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-140500-
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-
1257 AM EDT Mon Jul 13 2026 /1157 PM CDT Sun Jul 12 2026/

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

.DAY ONE...Today and Tonight

Additional isolated to numerous showers and storms will continue
into this evening. The flood watch has also been extended into
this evening. Most of the region is soaked and would not require
much additional rainfall to experience flooding again. However,
the heaviest rains are expected to be south of Knoxville. Though
no severe weather is expected, a few strong wind gusts are
possible with any stronger thunderstorm.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A few scattered showers and thunderstorms turning more isolated
midweek will be around during primarily the PM hours Tuesday and
onwards. While overall risk is very low during this time period,
cannot rule out isolated heavy rain or strong wind.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested as the flood threat continues
through today.

In the hours before

Local storm report, Jul 12, 8:37 PM EDT, 4 hours 25 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
837 PM EDT Sun Jul 12 2026

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

0830 PM     Flash Flood      1 NNW Knoxville         35.99N 83.95W
07/12/2026                   Knox               TN   911 Call Center

            Dodge Charger stuck in floodwaters near 275.

&&

NAW

Local storm report, Jul 12, 8:39 PM EDT, 4 hours 23 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
839 PM EDT Sun Jul 12 2026

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

0837 PM     Flash Flood      1 ESE Knoxville         35.97N 83.94W
07/12/2026                   Knox               TN   911 Call Center

            Knox dispatcher logs note two vehicles stuck
            in water near Western and Middlebrook with
            another report of a vehicle stuck near
            University and Western.

&&

NAW

Local storm report, Jul 12, 8:42 PM EDT, 4 hours 20 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
842 PM EDT Sun Jul 12 2026

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

0836 PM     Flash Flood      2 NE Alcoa              35.82N 83.96W
07/12/2026                   Blount             TN   Trained Spotter

            Street and yard flooding. Unknown depth.

&&

NAW

Local storm report, Jul 12, 8:50 PM EDT, 4 hours 12 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
850 PM EDT Sun Jul 12 2026

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

0845 PM     Flash Flood      1 E Knoxville           35.98N 83.93W
07/12/2026                   Knox               TN   911 Call Center

            Flooding in parking lot hindering exit from
            business. Also a report of 5th avenue nearby
            flooding.

&&

NAW

Local storm report, Jul 12, 9:07 PM EDT, 3 hours 55 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
907 PM EDT Sun Jul 12 2026

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

0900 PM     Flash Flood      2 NE Powell             36.05N 84.00W
07/12/2026                   Knox               TN   Amateur Radio

            Water on the road reported underneath the
            I-75 overpass at 75 and Emory. Ponding also
            occurring on the on ramp to 75-South.

&&

NAW

Local storm report, Jul 12, 9:13 PM EDT, 3 hours 49 minutes before

Preliminary Local Storm Report
National Weather Service Morristown TN
913 PM EDT Sun Jul 12 2026

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

0905 PM     Flash Flood      1 ESE Knoxville         35.96N 83.92W
07/12/2026                   Knox               TN   911 Call Center

            Reports of the Henley Street Tunnel
            flooding.

&&

NAW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 8:06 PM EDT	Special Weather Statement	MRX	Knox	54 min
Jul 12, 8:18 PM EDT	Flash Flood Warning	MRX	Blount, Knox	5 hr
Jul 12, 8:55 PM EDT	Areal Flood Advisory	MRX	Anderson, Campbell, Knox, Union	85 min
Jul 12, 9:26 PM EDT	Areal Flood Advisory	MRX	Blount, Sevier	3 hr
Jul 13, 12:50 AM EDT	Areal Flood Advisory	MRX	Hancock, Hawkins	3 hr
Jul 13, 11:57 AM EDT	Areal Flood Advisory	MRX	Marion	3 hr
Jul 13, 1:06 PM EDT	Areal Flood Advisory	MRX	Anderson, Blount, Knox, Loudon, Roane	3 hr
Jul 13, 1:40 PM EDT	Areal Flood Advisory	MRX	McMinn, Monroe, Polk	3 hr
Jul 13, 2:28 PM EDT	Areal Flood Advisory	MRX	Carter, Unicoi, Washington	2 hr
Jul 13, 7:56 PM EDT	Areal Flood Advisory	MRX	Knox	84 min

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.