818
FXUS64 KMRX 241704
AFDMRX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
104 PM EDT MON AUG 24 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1221 PM EDT MON AUG 24 2026
- DRY CONDITIONS WITH COMFORTABLE AFTERNOON HUMIDITY LEVELS THROUGH
TUESDAY.
- SHOWER AND THUNDERSTORM CHANCES WILL RETURN WEDNESDAY AND
ESPECIALLY THURSDAY.
- DRIER FOR THE WEEKEND.
DISCUSSION
ISSUED AT 114 AM EDT MON AUG 24 2026
IN THE UPPER LEVELS, A DEEP TROUGH REMAINS OVER THE EAST COAST AS A
RIDGE STAYS CENTERED OVER THE ROCKY MOUNTAINS. TEMPERATURES WILL BE
COOLER THIS MORNING WITH LOWS IN THE 60S FOR MOST OF THE TENNESSEE
VALLEY AND IN THE 50S IN NORTHEAST TENNESSEE, SOUTHWEST VIRGINIA AND
THE HIGHER ELEVATIONS. SOME PATCHY FOG WILL BE POSSIBLE MAINLY NEAR
BODIES OF WATER. TODAY AND TOMORROW WILL BE DRY WITH LOW HUMIDITY AS
HIGH PRESSURE REMAINS OVER THE OHIO VALLEY. HIGHS WILL BE IN THE 80S
FOR MOST OF THE TENNESSEE VALLEY, SORRY CHATTANOOGA (90-92). DEW
POINTS WILL BE PLEASANT IN THE 50S AT TIMES.
RAIN CHANCES START TO INCREASE ON WEDNESDAY AS A SHORTWAVE MOVES
INTO THE GREAT LAKES REGION. AT THE SURFACE, A STATIONARY BOUNDARY
WILL LIKELY BE OVER THE SOUTHEAST U.S., BRINGING A CHANCE FOR
SHOWERS AND STORMS WEDNESDAY EVENING AND INTO THE OVERNIGHT HOURS.
THURSDAY AFTERNOON WILL HAVE THE HIGHEST RAIN CHANCES AS A SHORTWAVE
MOVES THROUGH THE OHIO VALLEY.
FRIDAY THROUGH THE WEEKEND LOOKS MOSTLY DRY AS THE TROUGH WEAKENS.
SOME AFTERNOON SHOWERS AND STORMS WILL BE POSSIBLE MAINLY NEAR THE
MOUNTAINS AND FOOTHILLS.
AVIATION
(18Z TAFS)
ISSUED AT 1221 PM EDT MON AUG 24 2026
THE PRIMARY AVIATION WEATHER CONCERN IS THE POTENTIAL FOR FOG
DEVELOPMENT LATE TONIGHT ESPECIALLY TRI. RIGHT NOW THE PROBABILITY
OF FOG IMPACTS AT THE TERMINAL LOOKS TOO LOW TO INCLUDE AS
PREVAILING, BUT WILL INCLUDE A FEW HOURS OF TEMPO MVFR VSBY IN FOG
AROUND SUNRISE AT TRI. OTHERWISE, A VFR FORECAST FOR THE PERIOD
ALL SITES.
PRELIMINARY POINT TEMPS/POPS
CHATTANOOGA AIRPORT, TN 65 92 67 94 / 0 0 0 30
KNOXVILLE MCGHEE TYSON AIRPORT, TN 62 89 64 91 / 0 0 0 30
OAK RIDGE, TN 62 88 63 91 / 0 0 0 20
TRI CITIES AIRPORT, TN 56 84 60 88 / 0 0 0 20
MRX WATCHES/WARNINGS/ADVISORIES
NC...NONE.
TN...NONE.
VA...NONE.
DISCUSSION...MCD
AVIATION...99
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