Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 20, NWS Morristown, TN

June 28, 20265 counties in Tennessee; City of Bristol, Virginia

NWS Morristown, TN issued this flash flood warning at Jun 28, 2026, 1:18 AM EDT for 5 counties in Tennessee; City of Bristol, Virginia. 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: Jun 28, 2026, 1:18 AM EDT (05:18 UTC)
Expired: Jun 28, 2026, 4:13 AM EDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Greene County, TN, Hancock County, TN, Hawkins County, TN, Sullivan County, TN, Washington County, TN, City of Bristol, VA

The radar

The Knoxville radar (KMRX), 72 km from the middle of the area, began a volume at 05:20 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 5.3 hours before the alert went out and 349 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: 533 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 786 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: -7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 28, 12:50 AM EDT, 28 minutes earlier.

Area forecast discussion, Jun 28, 12:50 AM EDT, 28 minutes before

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Hazardous weather outlook, Jun 28, 12:55 AM EDT, 23 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
1255 AM EDT Sun Jun 28 2026

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-290500-
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-
1255 AM EDT Sun Jun 28 2026 /1155 PM CDT Sat Jun 27 2026/

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

.DAY ONE...Today and Tonight

Multiple rounds of showers and thunderstorms will continue through
early afternoon, mainly north of I-40. A few of these storms may
become strong to severe, producing gusty winds and heavy rainfall.
Isolated flooding is likely across any areas that see repeated
rounds of showers and storms, especially during the
overnight/morning hours. A Flood Watch is in effect through 11 AM
EDT Sunday morning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Very hot temperatures are expected Monday through Friday, with
heat indices expected to exceed 100 degrees in the Tennessee
Valley.

.SPOTTER INFORMATION STATEMENT...

Any reports of severe weather or flooding are greatly
appreciated.

In the hours before

Special weather statement, Jun 27, 10:58 PM EDT, 2 hours 20 minutes before

Special Weather Statement
National Weather Service Morristown TN
1058 PM EDT Sat Jun 27 2026

TNZ012-013-035-280345-
Scott TN-Campbell TN-Morgan TN-
1058 PM EDT Sat Jun 27 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN MORGAN...NORTHWESTERN
CAMPBELL AND SCOTT COUNTIES THROUGH 1145 PM EDT...

At 1058 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Ritner to near Blue Heron to near Jamestown to
12 miles east of Monterey. Movement was east at 35 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...
Oneida, Huntsville, Helenwood, Jellico, Winfield, Sunbright, Rugby,
Elk Valley, Smokey Junction, and Honey Creek State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3659 8414 3617 8442 3615 8445 3614 8444
      3612 8445 3616 8491 3621 8491 3624 8488
      3628 8488 3630 8480 3633 8477 3634 8474
      3637 8472 3637 8470 3640 8466 3657 8476
      3660 8472
TIME...MOT...LOC 0258Z 262DEG 32KT 3677 8464 3662 8456 3642 8490 3619
8504

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

BW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 10:58 PM EDT	Special Weather Statement	MRX	Morgan, Scott	47 min
Jun 28, 4:03 AM EDT	Flash Flood Warning	MRX	Anderson, Knox, Morgan, Roane	3 hr
Jun 28, 5:22 AM EDT	Flash Flood Warning	MRX	Campbell, Claiborne, Scott	8 hr
Jun 28, 6:43 AM EDT	Areal Flood Advisory	MRX	Greene	3 hr
Jun 28, 6:54 AM EDT	Areal Flood Advisory	MRX	Blount, Knox, Sevier	2 hr
Jun 28, 9:08 AM EDT	Flash Flood Warning	MRX	Anderson, Campbell, Grainger, Jefferson, Knox, Sevier and 1 more	5 hr
Jun 28, 9:29 AM EDT	Areal Flood Advisory	MRX	Cocke, Jefferson, Sevier	117 min
Jun 28, 10:06 AM EDT	Areal Flood Advisory	MRX	Morgan, Scott	4 hr
Jun 28, 10:40 AM EDT	Special Weather Statement	MRX	Blount, Knox, Loudon, Roane, Sevier	65 min
Jun 28, 11:19 AM EDT	Areal Flood Advisory	MRX	Anderson, Blount, Knox, Loudon, Roane	3 hr
Jun 28, 11:26 AM EDT	Flash Flood Warning	MRX	Cocke, Jefferson, Sevier	2 hr
Jun 28, 12:03 PM EDT	Special Weather Statement	MRX	Monroe	27 min
Jun 28, 1:39 PM EDT	Areal Flood Advisory	MRX	Campbell, Claiborne, Scott	2 hr
Jun 28, 1:40 PM EDT	Areal Flood Advisory	MRX	Anderson, Campbell, Grainger, Jefferson, Knox, Sevier and 1 more	2 hr
Jun 28, 1:54 PM EDT	Areal Flood Advisory	MRX	Cocke, Jefferson, Sevier	3 hr

Nearby

Flash Flood Warnings in Tennessee, 2026 Flash Flood Warnings in Virginia, 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.