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

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000 FXUS64 KMRX 151508 AFDMRX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 1108 AM EDT MON SEP 15 2014 .DISCUSSION...
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COOL AND MOIST AIR MASS CONTINUES ACROSS THE AREA THIS MORNING AS ISENTROPIC LIFT OVER THE TOP OF THE OLD FRONTAL BOUNDARY KEEPS A STEADY FLOW OF CONDENSING MOISTURE...IN THE LOWEST 1000-2000 FEET. SO CONDITIONS WILL BE SLOW TO IMPROVE. HOWEVER...CONDITIONS SHOULD IMRPOVE THIS AFTERNOON AS A SHORTWAVE TROUGH PUSHES INTO THE AREA...THAT SHOULD CAUSE SOME WEAK LIFT THAT WILL HELP TO COOL THE TRAPPING INVERSION. THIS SHOULD ALLOW MORE VERTICAL MIXING AND HELP DISPERSE THE MOISTURE THAT IS TRAPPED NEAR THE GROUND. ADDITIONALLY...VEERING WINDS NEAR THE SURFACE SHOULD BEGIN TO BRING IN WARMER AIR AT THE SURFACE. KEEPING THE SAME MAX TEMPERATURES TODAY...BUT HAVE SIGNIFICANTLY SLOWED THE HOURLY WARMUP. WITH THIS SHORTWAVE...WE SHOULD ALSO SEE SHOWERS FORMING DURING THE AFTERNOON...WITH A SLIGHT CHANCE OF THUNDER ACROSS THE SOUTHERN AREAS. HAVE A MENTION OF SLIGHT CHANCE OF THUNDER AS FAR NORTH AS KNOXVILLE. COLD FRONT THAT IS HEADED THIS WAY IS STILL FAR TO THE WEST...STRETCHING FROM NEAR GREEN BAY...TO KANSAS CITY...TO THE OKLAHOMA PANHANDLE. BY SUNSET THE FRONT WILL ONLY BE APPROACHING THE OHIO VALLEY...SO IT WILL NOT BE A PLAYER IN THE THUNDERSTORM THREAT THIS AFTERNOON...BUT THE SHORTWAVE WILL OFFER SOME LIFT AS MENTIONED BEFORE. STORMS WILL HAVE SOME SHEAR TO WORK WITH...BUT VERY WEAK INSTABILITY. SHOWERS/STORMS WILL BE MOVING PRETTY QUICKLY AS WELL...AS THE MID LEVEL WINDS INCREASE WITH THIS SHORTWAVE.
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&& .PRELIMINARY POINT TEMPS/POPS...
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CHATTANOOGA AIRPORT, TN 82 65 85 63 / 40 30 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 79 63 82 59 / 30 20 20 10 OAK RIDGE, TN 79 62 82 58 / 20 20 20 10 TRI CITIES AIRPORT, TN 78 59 78 53 / 20 20 20 10
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&& .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && $$

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