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

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS64 KMRX 182012 AFDMRX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 312 PM EST THU DEC 18 2014 .SHORT TERM...
-- Changed Discussion --
RADAR SHOWS SOME PATCHY LIGHT RAIN OR DRIZZLE WILL BE MOVING ACROSS THE AREA FOR THE NEXT FEW HOURS...BUT THIS SHOULD EXIT BY 00Z AND WILL CARRY NO POPS AFTER THAT TIME. THE QUESTION OVERNIGHT WILL BE WHETHER CLOUDS ARE ABLE TO ERODE AS MUCH AS THE GFS SAYS THEY WILL...OR IF THEY WILL HANG IN THROUGH MOST OF THE NIGHT AS SHOWN BY THE NAM. WILL LEAN TOWARD THE NAM AS UPSTREAM SATELLITE DOES NOT LOOK PROMISING FOR CLEARING ANY TIME SOON...AND THE RAP LOOKS CLOSER TO THE NAM. WILL ALSO LEAN TEMPS ON THE WARM SIDE OF MOS TONIGHT. THERE SHOULD BE SOME SUN ACROSS MOST OF THE AREA BY MORNING...THEN HIGH CLOUDS BEGIN TO INCREASE FROM THE SW AHEAD OF SOUTHERN STREAM VORT MAX AND JET STREAK. HIGH TEMPS SHOULD REACH A CATEGORY OR TWO HIGHER THAN TODAY. ANY PRECIP WITH THIS SYSTEM SHOULD HOLD OFF UNTIL AFTER THE END OF THE SHORT TERM PERIOD. .LONG TERM (FRIDAY NIGHT THROUGH THURSDAY)...A FAST MOVING SYSTEM THAT IS FORECAST TO FORM ALONG THE GULF COAST FRIDAY WILL MOVE FROM THE LOWER MS VALLEY INTO THE EASTERN TENNESSEE VALLEY OVERNIGHT FRIDAY NIGHT INTO SATURDAY MORNING. THE BULK OF THE SYSTEM WILL BE SOUTH OF TN AND AFFECT THE SOUTHEASTERN STATES INTO THE CAROLINAS. TEMPERATURES WILL DROP INTO THE 30S FRIDAY EVENING AND AREAS TO THE NORTH OF INTERSTATE 40...ESPECIALLY IN THE HIGHER ELEVATIONS COULD SEE SOME SNOW LATE FRIDAY NIGHT AND EARLY SATURDAY. LOWS WILL ONLY DROP TO NEAR FREEZING SO AMOUNTS ARE EXPECTED TO BE LIGHT...LESS THAN ONE INCH. TEMPERATURES SATURDAY WILL WARM ABOVE FREEZING TO THE 40S TO NEAR 50. WEAK HIGH PRESSURE BUILDS BACK IN SATURDAY NIGHT AND SUNDAY WITH SKIES BECOMING PARTLY SUNNY. SUNDAY NIGHT THROUGH LATE TUESDAY PATTERN CONTINUES TO BE UNSETTLED. UPPER TROUGH OVER THE CENTRAL STATES WILL HELP ANOTHER SYSTEM DEVELOP OVER THE NORTHERN PLAINS AND A NEW SYSTEM ALSO DEVELOPS ALONG THE GULF COAST. THE SOUTHERN SYSTEM WILL AFFECT THE FORECAST AREA FIRST WITH A CHANCE OF RAIN SUNDAY NIGHT AND MONDAY. THIS SYSTEM PULLS OUT AND THEN THE STRONGER SECOND SYSTEM WILL MOVE INTO THE OHIO AND TN VALLEYS MONDAY NIGHT AND TUESDAY. THIS SYSTEM IS EXPECTED TO FORM AN UPPER LOW OVER THE MID MS VALLEY TUESDAY AND THEN SLOWLY MOVE EAST INTO THE EASTERN GREAT LAKE STATES THROUGH WEDNESDAY. COLDER AIR ON THE BACK SIDE OF THE SYSTEM WILL LOWER TEMPERATURES WEDNESDAY AND THURSDAY. ALSO THE SYSTEM IS EXPECTED TO DEEPEN MORE. SNOW SHOWERS WILL LIKELY AFFECT THE NORTHERN PARTS OF THE AREA WEDNESDAY AND WEDNESDAY NIGHT.
-- End Changed Discussion --
&& .PRELIMINARY POINT TEMPS/POPS...
-- Changed Discussion --
CHATTANOOGA AIRPORT, TN 33 49 37 50 / 0 10 70 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 29 47 34 46 / 10 0 50 50 OAK RIDGE, TN 30 47 34 46 / 0 0 50 40 TRI CITIES AIRPORT, TN 28 46 30 43 / 10 0 30 50
-- End Changed Discussion --
&& .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && $$ DGS/TD

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.