318
FXUS64 KMRX 202305
AFDMRX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
605 PM EST SAT DEC 20 2025
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1241 PM EST SAT DEC 20 2025
- LOW TO MEDIUM CHANCES FOR LIGHT RAIN ON TUESDAY AND TUESDAY NIGHT.
- UNUSUALLY WARM TEMPERATURES FOR CHRISTMAS.
DISCUSSION
ISSUED AT 1241 PM EST SAT DEC 20 2025
DRY AND MILD THROUGH MONDAY WITH HIGHS IN THE 50S IN THE TENNESSEE
VALLEY. IN THE UPPER LEVELS, NEARLY ZONAL FLOW OR SLIGHT TROUGHING
WILL BE IN PLACE BEFORE A SLIGHT RIDGE BUILDS IN ON MONDAY. AT THE
SURFACE, HIGH PRESSURE WILL BE IN PLACE. LOW RAIN CHANCES WILL
RETURN MONDAY NIGHT THROUGH TUESDAY AS A LOW MOVES THROUGH THE GREAT
LAKES BRINGING A BOUNDARY THROUGH THE REGION OR STALLING JUST TO THE
NORTH. TEMPS LOOK WARM WITH HIGHS IN THE 60S EXPECTED FOR CHRISTMAS
EVE AND CHRISTMAS DAY, THANKS TO A RIDGE BUILDING INTO THE
SOUTHEAST. ANOTHER SHOT OF RAIN IS POSSIBLE ON FRIDAY AS ANOTHER
GREAT LAKES SYSTEM BRINGS ANOTHER BOUNDARY TO THE REGION.
HIGHS WILL BE UP TO 20 DEGREES ABOVE NORMAL ON CHRISTMAS DAY
FORECAST HIGH NORMAL HIGH RECORD HIGH
CHATTANOOGA: 72 52 75
KNOXVILLE AIRPORT: 68 49 76
TRI-CITIES: 63 48 74
AVIATION
(00Z TAFS)
ISSUED AT 528 PM EST SAT DEC 20 2025
SOME LOW CLOUDS WILL MOVE INTO THE REGION LATER TONIGHT. THE MOST
LIKELY TERMINAL TO BRIEFLY SEE MVFR CIGS LOOKS TO BE CHA. LOW
LEVEL WIND SHEAR WILL BE A CONCERN MAINLY NEAR TRI AND TYS TONIGHT,
ENDING IN THE EARLY MORNING HOURS. THE LOWER CLOUDS WILL SCATTER
OUT BY MID MORNING ALL SITES.
PRELIMINARY POINT TEMPS/POPS
CHATTANOOGA AIRPORT, TN 41 59 34 57 / 10 10 0 0
KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 54 30 55 / 10 10 0 0
OAK RIDGE, TN 38 54 31 54 / 10 0 0 0
TRI CITIES AIRPORT, TN 33 50 24 54 / 0 0 0 0
MRX WATCHES/WARNINGS/ADVISORIES
NC...NONE.
TN...NONE.
VA...NONE.
DISCUSSION...99
AVIATION...99
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