textproduct: Morristown

KEY MESSAGES

Updated at 748 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

(12Z TAFS) Issued at 748 AM EDT Sun Jun 28 2026

A line of showers and storms stretches across the middle portion of the forecast area from about the Smokies to the northern plateau. TYS sits at the best chance of precipitation at this time. With time, precipitation will shift south and east eventually exiting the area later this afternoon. CHA to most likely stay dry and VFR, but may have an outside chance of a shower or storm before everything exits the area. CIG and VSBY will vary to as low as IFR at TYS and TRI through this afternoon under a heavy shower/storm and during breaks in precip. Things clear tonight under an amplifying ridge. Models indicate fog and possible low CIG the last 6 hours of TAF or so at TYS and TRI, with TRI showing possible LIFR conditions.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 92 75 95 76 / 30 10 10 0 Knoxville McGhee Tyson Airport, TN 86 72 91 73 / 90 40 20 0 Oak Ridge, TN 87 72 92 74 / 90 30 20 0 Tri Cities Airport, TN 82 68 90 70 / 100 20 20 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.