Alert archive / Tennessee / Flash Flood Warnings in 2026

Flash Flood Warning 23, NWS Morristown, TN

June 28, 20267 counties in Tennessee

NWS Morristown, TN issued this flash flood warning at Jun 28, 2026, 9:08 AM EDT for 7 counties in Tennessee. It was in force for 5 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, 9:08 AM EDT (13:08 UTC)
Expired: Jun 28, 2026, 1:40 PM EDT
In force: 5 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Anderson County, TN, Campbell County, TN, Grainger County, TN, Jefferson County, TN, Knox County, TN, Sevier County, TN, Union County, TN

The radar

The Knoxville radar (KMRX), 36 km from the middle of the area, began a volume at 13:08 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, 1.1 hours before the alert went out and 251 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: 896 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 827 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.4

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, 8:13 AM EDT, 55 minutes earlier.

Area forecast discussion, Jun 28, 8:13 AM EDT, 55 minutes before

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Hazardous weather outlook, Jun 28, 12:55 AM EDT, 8 hours 13 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

Local storm report, Jun 28, 3:51 AM EDT, 5 hours 17 minutes before

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Local storm report, Jun 28, 4:48 AM EDT, 4 hours 20 minutes before

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Local storm report, Jun 28, 4:52 AM EDT, 4 hours 16 minutes before

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Local storm report, Jun 28, 5:09 AM EDT, 3 hours 59 minutes before

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Local storm report, Jun 28, 5:14 AM EDT, 3 hours 54 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
Jun 27, 10:58 PM EDT	Special Weather Statement	MRX	Morgan, Scott	47 min
Jun 28, 1:18 AM EDT	Flash Flood Warning	MRX	Greene, Hancock, Hawkins, Sullivan, Washington	3 hr
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, 9:29 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 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.