An MCS moved out of Kentucky into East Tennessee during the early morning hours of June 28th. This laid out a boundary that acted as a focus for additional shower and thunderstorm development through the late morning hours, resulting in training storms across the central Tennessee valley and numerous reports of flooding.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MRX wrote it up.
An MCS moved out of Kentucky into East Tennessee during the early morning hours of June 28th. This laid out a boundary that acted as a focus for additional shower and thunderstorm development through the late morning hours, resulting in training storms across the central Tennessee valley and numerous reports of flooding.
The local office's own words before the first event, 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 the first event at Jun 28, 12:56 AM EST, 34 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Morristown TN
156 AM EDT Sun Jun 28 2026
...New AVIATION...
.KEY MESSAGES...
Updated at 145 AM EDT Sun Jun 28 2026
- Widespread showers and storms continue through early afternoon.
Training storms may pose a flooding threat through the morning
hours north of I-40.
- Some guidance is showing the possibility of strong to severe
storms (MCS) moving through the region in the morning or early
afternoon hours. Confidence is low to medium.
- Hot temperatures well into the 90s are likely this coming work
week. Heat indices will climb above 100 degrees in the Tennessee
Valley especially by mid week.
&&
.DISCUSSION...
Issued at 1248 AM EDT Sun Jun 28 2026
In the upper levels, a ridge is over the Central U.S. and a trough
is over the Eastern U.S. A shortwave will move through the
Tennessee Valley before sunrise. At the surface, low pressure is
over the Northeast with a stationary boundary stretching back
through the Ohio Valley and Midwest connecting to a low in the
Rockies. This boundary is currently over Central/Southern IL/IN/OH
and is projected to have little to no movement through today.
Multiple rounds of showers and storms will continue through the
early afternoon hours. A cluster of storms has developed over
Northern Tennessee and Southern Kentucky. This cluster may produce
gusty winds and heavy downpours. Several rounds of showers and
storms will move through the region mainly north of I-40 through the
early afternoon hours. Gusty winds will be the primary threat with
flooding potential increasing toward the early morning hours. The
latest run of CAMs show training storms possible through the morning
hours with a swath of high rain totals north of I-40. A Flood Watch
remains in effect for most of the region through this morning and
may need to be extended into the early afternoon. Some guidance is
showing the possibility of strong to severe storms (MCS) moving
through the region in the morning or early afternoon hours.
Confidence is low to medium.
Showers and storms will slowly taper off Sunday afternoon. A strong
ridge will be building into the region from the Southeast up to the
Great Lakes Sunday afternoon/evening. Isolated shower activity will
continue Sunday evening as northwest flow aloft continues and the
boundary remains upstream.
Monday through Friday will be hot and mostly dry as a strong ridge
stays anchored over the Eastern U.S. There will be low rain chances
mainly in the higher terrain of the East Tennessee Mountains. Monday
and Tuesday highs will be mainly in the lower to mid 90s in the
Tennessee Valley. Wednesday through Friday will be even hotter with
highs in the mid to upper 90s. Heat index around 100 degrees is
likely in the Southern and Central Tennessee Valley Monday and
Tuesday. Heat index will be climbing into the 100 to 105 range on
Wednesday through Friday.
&&
.AVIATION...
(06Z TAFS)
Issued at 145 AM EDT Sun Jun 28 2026
A zonal stationary boundary and weak shortwave within the flow
will support multiple rounds of showers and thunderstorms through
the afternoon today. CHA may be just south enough to miss the
majority of the precipitation. Indicated an outside chance of TSRA
there once the precipitation becomes progressive. TRI and TYS are
likely to be situated between stripes of heavy precip accumulation
this morning and into the early part of the day. Drops in CIG and
VSBY can be expected under heavier showers/storms. TS probability
may drop the next few hours and then increase during the day
later on.
Conditions forecast to clear by the early evening. Though far out
in time and some uncertainty, lines added to hint at possible fog
near TYS and TRI tonight.
&&
.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN 91 74 95 76 / 40 10 10 0
Knoxville McGhee Tyson Airport, TN 87 72 91 74 / 80 30 20 0
Oak Ridge, TN 88 72 92 74 / 80 30 30 0
Tri Cities Airport, TN 84 68 90 70 / 80 30 30 0
&&
.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...Flood Watch until 11 AM EDT /10 AM CDT/ this morning for
Anderson-Bledsoe-Blount Smoky Mountains-Campbell-Claiborne-
Cocke Smoky Mountains-Grainger-Hamblen-Hancock-Hawkins-
Jefferson-Johnson-Knox-Loudon-McMinn-Meigs-Morgan-North
Sevier-Northwest Blount-Northwest Carter-Northwest Cocke-
Northwest Greene-Northwest Monroe-Rhea-Roane-Scott TN-
Sevier Smoky Mountains-Southeast Carter-Southeast Greene-
Southeast Monroe-Sullivan-Unicoi-Union-Washington TN.
VA...Flood Watch until 11 AM EDT this morning for Lee-Russell-Scott
VA-Washington VA-Wise.
&&
DISCUSSION...McD
AVIATION...KSHazardous 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.
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
BWThe Knoxville radar (KMRX), 95 km away, was scanning. The volume nearest the first event began at 06:27 UTC.
17 flash flood, 3 flood. Local standard time, as filed.
Flooding reported at the intersections of Oakland Avenue and Lakeview Drive, and Princeton Road and Austin Springs Road.
High water reported at the Karns underpass near the intersection of Ball Camp Byington Road and Byington Solway Road.
Tennessee Highway Patrol report of about 3 feet of running water near N Cedar Bluff Rd and Executive Park Dr.
Roadway flooded near Lockett Rd and Deane Hill Dr.
Roadway flooded on Downtown W Blvd, just north of Gleason Dr NW.
Moderate flooding in back yard, with water several inches deep. Water was also covering the foundation of several outdoor buildings.
Water was over the roadway on Shawnee Drive.
Road washed out at the intersection of Roberts Lane and Ivy Dale Road.
Water flowing over Shipe Road in Corryton with at least 15 feet of the roadway covered by a couple inches of quick flowing water.
County dispatch reports multiple roadways south and east of Huntsville are flooded, with waters still rising.
Several inches of standing water were flooding the front yard in front of a home in Andersonville. The road is not covered by water, but water is next to the pictured home.
Street flooding noted near the Creekside Ridge Subdivision in Dandridge, near intersection of State Route 92 and W Price Road. Report noted that the roadbed was not visible.
Thompson School Road was starting to flood at Emory Road.
Jefferson County evacuated a family from a home on Piedmont Road. Pictures show water flowing past home, but it did not appear to have water in the residence at that time.
Street flooding near Plum Creek Park with one or two inches of water flowing over and pooling on the road surface.
Several inches of water in the basement and garage of a home. Resident of 10 years stated they had never seen water this high.
One lane closed on Veterans Blvd, near the Dig'N Zone theme park, due to flood issues.
Multiple roads in Anderson were flooded or impassable. N Charles G Seivers Blvd was flooded at Interstate 75, and Indian Fork Road in Norris had 2-3 feet of swift moving water over it.
Report of road being flooded at Edington and Maryville Pike. Depth was unknown and cars were still attempting to power through.
Gists Creek Road was partially flooded with standing water over the roadway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2026Every state in 2026This day in weather historyWarnings in Tennessee, June 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1351625, 1351626, 1351627, 1351628, 1351629, 1351655, 1351658, 1351662, 1351630, 1351631, 1351632, 1351633, 1351634, 1351635, 1351636, 1351637, 1351638, 1351642, 1351650, 1351653.