Area Forecast Discussion
Issued by NWS Knoxville/Tri Cities, TN

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000 FXUS64 KMRX 241940 AFDMRX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 236 PM EST WED DEC 24 2014 .SHORT TERM (CHRISTMAS EVE NIGHT AND CHRISTMAS)...STRENGTHENING SW TO NE JET CORE IN ADVANCE OF APPROACHING UPPER TROUGH WILL MOVE THROUGH E TN VALLEY THIS EVENING. SURFACE COLD FRONT CLOSELY ASSOCIATED WITH THIS FEATURE. SCATTERED AND WEAKENING RAIN SHOWERS WILL MOVE THIS EVENING. WEST WINDS WILL BECOME BREEZY THIS EVENING BEHIND THE FRONT. LIGHT POST FRONTAL SHOWERS WILL CONTINUE OVERNIGHT ACROSS NORTHERN AREAS OF MRX CWA. SOME UPSLOPE SNOW SHOWERS POSSIBLE LATE TONIGHT WITH LIMITED MOISTURE. LOW LEVEL CAP WILL KEEP CLOUD COVER IN PLACE OVERNIGHT. CLOUDS WILL BE SLOW TO ERODE FROM THE SW ON CHRISTMAS DAY. POST FRONTAL TEMPERATURE ADVECTION NOT VERY STRONG. .LONG TERM (CHRISTMAS NIGHT THROUGH WEDNESDAY)...NEXT RAIN CHANCES MOVE IN THIS WEEKEND...WITH THE BEST POPS AND AMOUNTS EXPECTED ON SUNDAY. WE WILL REMAIN BENEATH A DISTURBED AND FAIRLY MOIST SOUTHWESTERLY FLOW ALOFT...RESULTING IN CHANCE OR SLIGHT CHANCE POPS MONDAY THROUGH WEDNESDAY. MEANWHILE...COLDER AIR WILL SLOWLY SAG INTO AREA FROM NORTH SUCH THAT BY TUESDAY WE WILL START SEEING RAIN OR SNOW MIXES TUESDAY MORNING OVER THE NORTHERNMOST SECTIONS OF CWA AND THE MOUNTAINS...WITH COVERAGE OF SNOW EXPANDING FURTHER SOUTH BY WEDNESDAY MORNING TO COVER MUCH OF AREA. SAME FOR WED NIGHT. THIS PRECIP IS NOT EXPECTED TO BE OF NOTEWORTHY INTENSITY AT THIS TIME...AS POPS WILL BE ON THE ORDER OF 20-30 PCT...BUT INTERMITTENT LIGHT SNOWS MAY FLUTTER IN THE AIR FOR MUCH OF THE TUES-MORNING-TO- WED-NIGHT TIME FRAME. FORTUNATELY NONE OF THE PRECIP IN THE EXTENDED PERIOD LOOKS TO BE HEAVY AT THIS TIME...MAYBE AVERAGING HALF AN INCH ON SUNDAY...SO THE RIVERS ELEVATED BY LAST NIGHT/S RAIN SHOULD HAVE A STRETCH OF TIME TO RECEDE. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 35 49 32 58 / 10 0 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 36 48 30 57 / 10 10 0 0 OAK RIDGE, TN 36 48 30 56 / 10 10 0 10 TRI CITIES AIRPORT, TN 35 44 25 57 / 30 10 0 0 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && $$ SON/GC

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