549
FXUS64 KMRX 201758
AFDMRX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
1258 PM EST SAT DEC 20 2025
..NEW DISCUSSION, 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
(18Z TAFS)
ISSUED AT 1241 PM EST SAT DEC 20 2025
SOME LOW CLOUDS WILL MOVE INTO THE REGION TONIGHT. MVFR CIGS ARE
POSSIBLE BRIEFLY MAINLY NEAR CHA. LOW LEVEL WIND SHEAR WILL BE A
CONCERN MAINLY NEAR TRI AND TYS, ENDING IN THE EARLY MORNING
HOURS. CLOUDS WILL SCATTER OUT BY MID MORNING.
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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