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

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000 FXUS64 KMRX 311905 AFDMRX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 305 PM EDT FRI JUL 31 2015 .SHORT TERM /TONIGHT AND SATURDAY/... A VERY QUIET DAY ACROSS THE TENNESSEE VALLEY AND SOUTHERN APPALACHIAN REGION WITH A SURFACE HIGH BUILDING IN...ALONG WITH MUCH DRIER AIR. THE SUNNY CONDITIONS HAVE HELPED TEMPS CLIMB WELL INTO THE 80S...AND THEY WILL LIKELY TOP OFF IN THE UPPER 80S TO AROUND 90 OR 91 THIS AFTERNOON. HOWEVER...RH VALUES ARE MUCH LOWER MAKING FOR A MORE COMFORTABLE AFTERNOON ACROSS THE REGION. THE CLEAR AND MOSTLY CALM CONDITIONS WILL CONTINUE TONIGHT AND SATURDAY...MAKING FOR A GREAT VIEWING EXPERIENCE FOR THE BLUE MOON /SECOND FULL MOON OF JULY/ TONIGHT. GOOD RADIATIONAL COOLING WILL TAKE PLACE THIS EVENING...AND ALLOW TEMPS TO DROP OFF QUICKLY... BEFORE BOTTOMING OUT IN THE LOW TO MID 60S. AMPLE SUNSHINE AND NORTHWEST FLOW CONTINUE ON SATURDAY...WITH HIGHS PERHAPS A DEGREE HIGHER THAN TODAY. .LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/... THE EXTENDED BEGINS WITH LITTLE CHANGE IN THE WEATHER PATTERN WITH DRY NORTHWEST FLOW ALOFT AND SURFACE HIGH PRESSURE BUILDING INTO THE REGION. THIS TRANSLATES INTO DRY...WARM CONDITIONS FOR THE FIRST HALF OF THE EXTENDED. MONDAY AND TUESDAY...A COUPLE OF WEAK IMPULSES IN THE UPPER FLOW WILL TRACK THROUGH TO OUR NORTH AND MAY BRING A FEW ISOLATED SHOWERS/THUNDERSTORMS INTO NORTHERN LOCATIONS. THERE CONTINUES TO BE SOME DIFFERENCES IN MODELS BY THE END OF THE PERIOD BUT GENERALLY A SERIES OF SHORT WAVES IN THE UPPER FLOW WILL MOVE INTO THE AREA. THIS COMBINED WITH SOME LOW LEVEL MOISTURE RETURN WILL GENERATE ISOLATED TO SCATTERED CONVECTION OVER THE REGION WEDNESDAY THROUGH FRIDAY. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 67 92 68 92 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 64 90 65 89 / 0 0 0 10 OAK RIDGE, TN 64 90 65 89 / 0 0 0 10 TRI CITIES AIRPORT, TN 59 87 59 86 / 0 0 10 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && $$ AMP

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