396
FXUS64 KMRX 021109
AFDMRX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
609 AM EST TUE DEC 2 2025
..NEW AVIATION
KEY MESSAGES
UPDATED AT 604 AM EST TUE DEC 2 2025
- WIND ADVISORY REMAINS IN EFFECT ACROSS THE EAST TN MOUNTAINS AND
FOOTHILLS THROUGH 6 AM EST THIS MORNING FOR GUSTS UP TO 45 MPH.
- LIGHT FREEZING RAIN PROBABLE OVER THE NEXT FEW HOURS ACROSS THE
FAR NORTHEAST TN MOUNTAINS, INCLUDING HIGHER ELEVATIONS OF SOUTHWEST
VIRGINIA. A CHANGE OVER TO RAIN IS EXPECTED BEFORE SUNRISE. MINIMAL
TO NO LOCALIZED IMPACTS EXPECTED.
- A CHANGEOVER TO SLEET AND THEN SNOW STILL LOOKS LIKELY LATER THIS
MORNING ACROSS THE NORTHERN CUMBERLAND PLATEAU, AND THE HIGHER
ELEVATIONS OF EAST TENNESSEE AND SOUTHWEST VIRGINIA. LIMITED
ACCUMULATIONS AT MOST. LITTLE TO NO IMPACTS.
- DRY WEDNESDAY, PRECIPITATION CHANCES INCREASING LATE THURSDAY
INTO NEXT WEEKEND WITH MULTIPLE SYSTEMS. LIGHT PRECIPITATION
AMOUNTS PROBABLE..
DISCUSSION
ISSUED AT 1231 AM EST TUE DEC 2 2025
NOW THROUGH THIS AFTERNOON:
RAIN:
RAIN SHOWERS ARE MOVING ACROSS THE REGION WITH THE ADVANCING
SHORTWAVE. THE BULK OF THE PRECIPITATION WILL EXIT BY THIS
AFTERNOON. STORM TOTAL QPF LOOKS SIMILAR TO THE LAST ISSUANCE,
WITH MOST AREAS AVERAGING BETWEEN 0.5 AND 0.75 INCHES. A FEW
ISOLATED AREAS MAY SEE UP TO 1 INCH.
WIND:
A WIND ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST THIS MORNING FOR
WIND GUSTS TO AROUND 50 MPH IN THE ADVISORY LOCATIONS, EAST TN
MOUNTAINS AND FOOTHILLS. THE LATEST OBSERVATION FROM COVE MOUNTAIN
SHOWS 52 MPH AS OF A FEW HOURS AGO. THE ADVISORY LEVEL GUSTS
SHOULD START TO DECLINE AFTER 6 AM AS THIS IS WHEN THE 850 MB JET
START TO WEAKEN ACROSS THE AREA. HOWEVER, WIND GUSTS FROM 20 TO 30
MPH WILL STILL REMAIN ACROSS THE EAST TN MOUNTAINS THROUGH THE
DAY.
FREEZING RAIN:
ACCORDING TO THE HI-RES MODELS, FREEZING RAIN IS PROBABLE AT THE
CURRENT HOUR ACROSS THE FAR NORTHEAST TN MOUNTAINS. THE MOST LIKELY
AREAS TO SEE A TRACE TO A FEW HUNDREDTHS OF AN INCH OF ICE, BEFORE
THE CHANGEOVER TO RAIN BY SUNRISE, WILL BE IN THE MOUNTAIN
COMMUNITIES NEAR LAUREL CREEK, FORGE CREEK, AND BRUSHY FORK IN
EASTERN JOHNSON COUNTY, TN NEAR THE TN/NC LINE. MINIMAL TO NO
IMPACTS ARE EXPECTED FOR MOST AREAS.
SLEET/SNOW:
AS THE SHORTWAVE MOVES EAST LATER THIS MORNING, TEMPERATURES WILL
DROP AS COLDER AIR MOVING IN FROM THE NORTHWEST ON THE BACKSIDE OF
THIS SYSTEM. THE HRRR, REFS, HREF, STILL SHOW A TRANSITION FROM
RAIN, TO SLEET, TO SNOW. THIS OCCURS BETWEEN 7 AM AND 10 AM THIS
MORNING, BUT ALSO AS MOISTURE IS EXITING. THE LATEST HRRR RUNS ARE
LESS BULLISH THAN PREVIOUS ONES, AND SHOW VERY LITTLE SLEET/SNOW
FOR ANY LOCATION IN OUR AREA. IF WE DO SEE THIS BRIEF TRANSITION,
IT WILL OCCUR IN NORTHERN SCOTT COUNT TN, ALONG THE TN/KY STATE
LINE, AND INTO PORTIONS OF SOUTHWEST VA (MOST LIKELY WISE COUNTY).
ACCUMULATIONS WILL BE LITTLE TO NONE AND NO IMPACTS ARE EXPECTED.
AT BEST, THERE MAY BE AN ISOLATED REPORT OF UP TO ONE HALF INCH
OF SNOW BUT MOST AREAS WON'T EVEN SEE A TRACE.
SOME LIGHT SNOW SHOWERS ARE THEN POSSIBLE LATER TODAY AND THIS
EVENING ACROSS THE HIGHER ELEVATIONS OF THE EAST TENNESSEE MOUNTAINS
AS NORTHWEST FLOW TAKES OVER. LITTLE TO NO ACCUMULATION IS EXPECTED
DURING THIS TIME AND NO IMPACTS.
REST OF THE FORECAST:
PATCHY BLACK ICE COULD BE POSSIBLE TONIGHT IN AREAS THAT DO NOT
FULLY DRY OUT, BUT THE DRY AIR AND WIND SHOULD EVAPORATE MOST
MOISTURE ON SURFACES. HIGH PRESSURE AND COOLER AIR BRINGS COOL,
CLEAR CONDITIONS TO THE REGION ON WEDNESDAY.
CHANCE PROBABILITIES OF PRECIPITATION ARRIVE BY LATE WEEK INTO THE
WEEKEND AS A QUICK MOVING COLD FRONT AND SOUTHERLY LOW PRESSURE
SYSTEM APPROACHES OUR AREA. MOISTURE IS LIMITED, BUT SOME INCREASED
CLOUDS ON THURSDAY AFTERNOON AND FRIDAY IS EXPECTED. AT THIS TIME,
THIS IS MOST LIKELY AN ALL LIGHT RAIN EVENT FOR MOST LOCATIONS.
THERE IS A CHANCE FOR SOME WINTRY MIX OF RAIN AND/OR SNOW ACROSS THE
HIGHER TERRAIN OF THE MOUNTAINS. DETAILS ARE UNCERTAIN AND FORECAST
CONFIDENCE IN PRECIPITATION PROBABILITIES, AMOUNTS, AND TYPES IF
FAIRLY LOW ON FRIDAY INTO SATURDAY. THERE IS CONSIDERABLE
UNCERTAINTY WITH WHETHER THESE SYSTEMS WILL REMAIN WEAK AND SEPARATE
OR PHASE WITH A RESULTANT STRONGER LOW PRESSURE SYSTEM.
A QUICK MOVING NORTHERLY STREAM SHORTWAVE MAY IMPACT THE REGION ON
SUNDAY OR MONDAY, BUT DETAILS REMAIN UNCERTAIN. AT THE VERY LEAST,
MINIMAL PRECIPITATION ACCUMULATION IS EXPECTED WITH THESE LIKELY
MOISTURE-STARVED SYSTEMS.
AVIATION
(12Z TAFS)
ISSUED AT 604 AM EST TUE DEC 2 2025
POOR AVIATION CONDITIONS WILL CONTINUE OVER THE NEXT COUPLE OF
HOURS WITH TRI, CURRENTLY VFR, EXPECTED TO DROP TO IFR AND MVFR BY
SUNRISE AS RAIN INTENSIFIES. FOR CHA AND TYS, FURTHER REDUCTIONS
BEYOND WHAT IS BEING SEEN ARE UNLIKELY WITH VISIBILITIES IMPROVING
IN THE NEXT 2 TO 3 HOURS. CEILINGS, HOWEVER, WILL BE SLOWER TO
IMPROVE BACK TO MVFR BY LATER THIS MORNING. MVFR CEILINGS LOOK
LIKELY TO CONTINUE THROUGHOUT THE DAY WITH A GRADUAL SHIFT TO
NORTHWESTERLY WINDS. SOME IMPROVEMENTS AFTER SUNSET ARE FORECAST
AT CHA BY LATE AFTERNOON, BUT PERSISTENT MVFR IS LIKELY AT TYS AND
TRI.
PRELIMINARY POINT TEMPS/POPS
CHATTANOOGA AIRPORT, TN 48 27 50 33 / 50 0 0 0
KNOXVILLE MCGHEE TYSON AIRPORT, TN 46 27 47 31 / 80 0 0 0
OAK RIDGE, TN 44 25 46 29 / 70 0 0 0
TRI CITIES AIRPORT, TN 44 25 44 27 / 100 0 0 0
MRX WATCHES/WARNINGS/ADVISORIES
NC...NONE.
TN...NONE.
VA...NONE.
DISCUSSION...99
AVIATION...BW
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