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 180737 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 337 AM EDT Mon Sep 18 2017 .SHORT TERM...Area observations and satellite shows patchy fog, some locally dense, across the area. The fog is mainly restricted across the area waterways. For Today and tonight, ridging will remain across the Tennessee valley with mid-level warm layer capping convection over the area. Patchy fog is once again expected acrsos the region early Tuesday morning. .Long Term (Tuesday through Sunday)...An upper level trough and associated cold front shift southeast toward the Southern Appalachian region on Tuesday bringing a small chance of a shower or thunderstorms to the Cumberland Plateau. The rest of the long term period, both the ECMWF and the GFS try to advect this very weak area of low pressure aloft anticyclonically around a persistent Eastern U.S. upper ridge. In the lower levels, higher dewpoint air never really becomes established with the flow veering from northerly through southeasterly into the weekend as the 700 and 850 mb ridge strengthens over the southeastern states. It appears that the superblend probability of precipitation is a little too high through much of the extended forecast and broadbrushes pops across the entire forecast area. Due to the low level flow pattern and the strengthening ridge presented by both medium range models, tried to limit the chance for convection to higher terrain features right through the weekend. It looks like more above normal warmth is in store in this pattern with highs in the 80s and lows in the 60s. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 88 67 87 67 / 0 0 10 10 Knoxville McGhee Tyson Airport, TN 85 63 85 64 / 0 10 10 10 Oak Ridge, TN 86 64 84 65 / 10 10 20 10 Tri Cities Airport, TN 83 59 81 60 / 0 0 10 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.