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

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000 FXUS64 KMRX 151912 AFDMRX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 310 PM EDT TUE APR 15 2014 .SHORT TERM (TONIGHT AND WEDNESDAY)...TRAILING UPPER LEVEL SYSTEM WILL TAKE SEVERAL MORE HOURS TO PUSH EAST OF THE MOUNTAINS. THE SYSTEM WILL CONTINUE TO PRODUCE SOME LIGHT RAIN AND SNOW LOWER ELEVATIONS WITH SOME SNOW SHOWERS IN THE MOUNTAINS. NICE BREEZE WILL CONTINUE IN TIGHT PRESSURE GRADIENT BETWEEN THE DEPARTING LOW AND THE CENTRAL U.S. SURFACE RIDGE. THEREFORE WILL KEEP THE WIND ADVISORY GOING THROUGH MID EVENING. PRECIP SHOULD TAPER OFF BY 00Z WEDNESDAY BUT LOW DECK WILL TAKE A FEW HOURS TO DISSIPATE. GRADIENT DROPS OFF LATER THIS EVENING ALLOWING WINDS TO DECOUPLE AND THIS SHOULD LEAD TO A QUICKER DROP OFF IN TEMPERATURES. THE FREEZE WARNING WILL REMAIN IN PLACE WITH A HARD FREEZE EXPECTED ACROSS THE NORTH WHILE MINS ACROSS THE SOUTH WILL EDGE JUST BELOW FREEZING TOWARD MORNING. THIS IS SUCH AN ANOMALOUS AIRMASS THAT RECORD MINS COULD BE TIED OR EXCEEDED FOR THE DATE AT TRI...TYS AND CHA. DRY AIR AND RIDGING WILL BRIGHTEN SPIRITS ON WEDNESDAY WITH FULL SUNSHINE EXPECTED. EVEN WITH UNABATED INSOLATION MAX TEMPS WILL STILL BE ABOUT TEN DEGREES BELOW NORMAL IN THE LOW TO MID 60S. .LONG TERM (WEDNESDAY NIGHT THROUGH TUESDAY)...RIDGE OF HIGH PRESSURE WILL PRODUCE ANOTHER GOOD NIGHT OF RADIATIONAL COOLING WEDNESDAY NIGHT...ESPECIALLY ACROSS SHELTERED VALLEYS. MIN TEMPERATURES WILL DROP INTO THE UPPER 20S AND LOWER 30S ACROSS MUCH OF SOUTHWEST VIRGINIA/NORTHEAST TENNESSEE...FAR EASTERN TENNESSEE MOUNTAINS AND CHEROKEE AND CLAY COUNTIES OF NORTH CAROLINA. MARGINAL FREEZE WATCH FOR THESE AREAS FOR WEDNESDAY NIGHT/THURSDAY MORNING REMAINS IN PLACE. A LOW AMPLIFIED UPPER TROUGH MOVES THROUGH THE OHIO AND UPPER TN VALLEYS ON FRIDAY. WEAK FRONT ASSOCIATE WITH THIS FEATURE. MOISTURE IS LIMITED WITH THIS SYSTEM. THROWING OUT THE NAM WHICH FAVORS MUCH MORE RETURN GULF MOISTURE. CONTINUED WITH A DRIER FORECAST FOR THE WEEKEND. SURFACE RIDGING BUILDS IN FROM THE NORTH WITH SOUTHERN UPPER RIDGE MOVING EAST ACROSS THE AREA. ALSO LEANED A BIT WARMER FOR MINUTES OF SUNSHINE. SHORT WAVE MOVES INTO TN VALLEY ON MONDAY. SYSTEM SLIDES SLOWLY THROUGH THE SOUTHERN APPALACHIANS BY TUE. THIS IS FOLLOWED BY NW FLOW WHICH COULD KEEP SCATTERED CONVECYION GOING INTO EARLY NEXT WEEK. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 30 63 35 68 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 29 62 34 67 / 0 0 0 0 OAK RIDGE, TN 28 62 33 67 / 0 0 0 0 TRI CITIES AIRPORT, TN 26 60 29 67 / 0 0 0 0 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...FREEZE WATCH FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING FOR CHEROKEE-CLAY. FREEZE WARNING FROM 10 PM THIS EVENING TO 10 AM EDT WEDNESDAY FOR CHEROKEE-CLAY. WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR CHEROKEE-CLAY. TN...FREEZE WATCH FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING FOR BLOUNT SMOKY MOUNTAINS-COCKE SMOKY MOUNTAINS-HANCOCK- HAWKINS-JOHNSON-NORTHWEST CARTER-NORTHWEST GREENE-SEVIER SMOKY MOUNTAINS-SOUTHEAST CARTER-SOUTHEAST GREENE-SOUTHEAST MONROE-SULLIVAN-UNICOI-WASHINGTON TN. FREEZE WARNING FROM 10 PM EDT /9 PM CDT/ THIS EVENING TO 10 AM EDT /9 AM CDT/ WEDNESDAY FOR ANDERSON-BLEDSOE-BLOUNT SMOKY MOUNTAINS-BRADLEY-CAMPBELL-CLAIBORNE-COCKE SMOKY MOUNTAINS- EAST POLK-GRAINGER-HAMBLEN-HAMILTON-HANCOCK-HAWKINS- JEFFERSON-JOHNSON-KNOX-LOUDON-MARION-MCMINN-MEIGS-MORGAN-NW BLOUNT-NORTH SEVIER-NORTHWEST CARTER-NORTHWEST COCKE- NORTHWEST GREENE-NORTHWEST MONROE-RHEA-ROANE-SCOTT TN- SEQUATCHIE-SEVIER SMOKY MOUNTAINS-SOUTHEAST CARTER- SOUTHEAST GREENE-SOUTHEAST MONROE-SULLIVAN-UNICOI-UNION- WASHINGTON TN-WEST POLK. WIND ADVISORY UNTIL 10 PM EDT THIS EVENING FOR BLOUNT SMOKY MOUNTAINS-COCKE SMOKY MOUNTAINS-JOHNSON-SEVIER SMOKY MOUNTAINS-SOUTHEAST CARTER-SOUTHEAST GREENE-UNICOI. WIND ADVISORY UNTIL 8 PM EDT /7 PM CDT/ THIS EVENING FOR BLEDSOE- BRADLEY-CAMPBELL-EAST POLK-HAMILTON-MARION-MCMINN-MEIGS- MORGAN-NORTHWEST MONROE-RHEA-SCOTT TN-SEQUATCHIE-SOUTHEAST MONROE-WEST POLK. VA...FREEZE WATCH FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING FOR LEE-RUSSELL-SCOTT-WASHINGTON-WISE. FREEZE WARNING FROM 10 PM THIS EVENING TO 10 AM EDT WEDNESDAY FOR LEE-RUSSELL-SCOTT-WASHINGTON-WISE. && $$

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