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

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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 191918 AFDMRX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 318 PM EDT SUN APR 19 2015 .SHORT TERM (TONIGHT AND MONDAY)...UPPER TROUGH OVER THE MID- SECTION OF THE NATION WILL CONTINUE TO BE CAUGHT UP WITH THE LONG- WAVE NORTHERN STREAM UPPER TROUGH OVER SOUTHERN CANADA. A SERIES OF WAVES/JETS HAVE EJECTED FROM THIS TROUGH. ONE SUCH WAVE IS MOVING ACROSS THE EASTERN PART OF THE AREA WITH A BAND OF RAIN BETWEEN TRI AND TYS. ANOTHER WAVE IS MOVING ACROSS MIDDLE TENNESSEE...WHICH IS HELP TO PRODUCE A BAND OF SHOWERS AND THUNDERSTORMS JUST WEST OF NASHVILLE. THE LAST WAVE WILL MOVE INTO THE AREA TOWARD 12Z MONDAY. THIS WAVE WILL PRODUCE ROUNDS OF SHOWERS AND STORMS THROUGH MONDAY. SINCE THE AIRMASS HAS NOT BEEN ABLE TO RECOVER FROM FIRST BAND OF SHOWERS...ONLY MARGINAL INSTABILITY. MAY SEE AN ISOLATED STRONG STORM...POSSIBLY SEVERE OVER THE PLATEAU AND SOUTHEAST TENNESSEE. MAIN CONCERN STRONG GUST WINDS AND SMALL HAIL. HEAVY RAINS ALSO POSSIBLE...ESPECIALLY OVER FAR NORTHEAST SECTIONS. FOR MONDAY...FRONT MOVES ACROSS THE AREA. COLD AIR ALOFT WILL KEEP AIRMASS UNSTABLE ENOUGH TO PRODUCE SCATTERED SHOWERS. BREEZY SOUTHWEST-WEST WINDS ANTICIPATED FOR MONDAY. .LONG TERM (MONDAY NIGHT THROUGH SUNDAY...MAY SEE SCATTERED CONVECTION DEVELOP OVER THE AREA MONDAY EVENING AS A FRONT EXITS THE AREA AND THE UPPER LOW PULLS IN A WEAK IMPULSE. LINGERING WEAK INSTABILITY OVER THE AREA WILL AID DEVELOPMENT AND CAN NOT RULE OUT A STRAY STRONG STORM. DRY AND COOLER CONDITIONS WILL MOVE IN BEHIND THE FRONT FOR TUESDAY. WILL...THEN...TRANSITION INTO AN UNSETTLE WEATHER PATTERN AS A SERIES OF WEAK SHORT WAVES TRACK ACROSS THE REGION. TIMING OF THE WAVES REMAINS UNCERTAIN BUT CURRENT MODEL TRENDS CENTER AROUND THURSDAY AND LATE FRIDAY INTO SATURDAY FOR THE BEST CHANCE OF PRECIPITATION. MAINLY EXPECTED SHOWERS WITH LIMITED THUNDERSTORM ACTIVITY. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 61 72 48 70 / 60 40 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 60 70 46 66 / 60 60 20 10 OAK RIDGE, TN 60 69 46 67 / 60 60 20 10 TRI CITIES AIRPORT, TN 57 71 44 63 / 60 60 40 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && $$

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