ShawnEastTN Posted February 19, 2020 Share Posted February 19, 2020 I think this is going to be interesting... Dewpoints around the valley are intriguing. My dewpoint currently is 29, most locations from a line from Dayton to Athens and north are around or below freezing except nearest to the Eastern mountains and far southern valley where dewPoints are in the mid to upper 30's.Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 18z Goofy starting to join the party Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 18z GFS sounding went from 42 to 36 at surface vs 12z due to more moisture/evap cooling..still a little too warm (for southern valley) Link to comment Share on other sites More sharing options...
PowellVolz Posted February 19, 2020 Share Posted February 19, 2020 18z GFS sounding went from 42 to 36 at surface vs 12z due to more moisture/evap cooling..still a little too warm (for southern valley)the main thing here IMO is that’s a big correction this late in the game. . Link to comment Share on other sites More sharing options...
Holston_River_Rambler Posted February 19, 2020 Author Share Posted February 19, 2020 1 hour ago, tnwxwatcher said: Wonder what our chances of staying semi-clear for a while are through the night to get some of that good radiational cooling? Then I wonder about evaporative cooling at the onset of the precip or will any of that play any factor in this current upcoming scenario? Looks like clouds are racing back in, even up here on the plateau. 18z NAM, unless I'm reading it incorrectly, basically shows evaporational/ wet bulb cooling. Still 46 - 47 up here. Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 31 minutes ago, ShawnEastTN said: I think this is going to be interesting... Dewpoints around the valley are intriguing. My dewpoint currently is 29, most locations from a line from Dayton to Athens and north are around or below freezing except nearest to the Eastern mountains and far southern valley where dewPoints are in the mid to upper 30's. Sent from my SM-G965U using Tapatalk Dew points starting to crash here along the southern foothills..I agree, if the DP can get down around ~25 (no waa with system) plus radiational cooling and the inverted trof (may aide rates)..there's slot of uncertainty if the models are right about the temps..some leeway to go colder imo. PWS in Loudon showing the DP crash moving down the valley Link to comment Share on other sites More sharing options...
Holston_River_Rambler Posted February 19, 2020 Author Share Posted February 19, 2020 This is going to sound a little crazy, but now that you mention it, I can actually feel the drier air on my skin. Just went for a run at Frozen head, up to ~2000 feet and man the blue sky to the NE was blue, like it normally is when the air is really dry: Still that chilly NE wind blowing down the stream Link to comment Share on other sites More sharing options...
PowellVolz Posted February 19, 2020 Share Posted February 19, 2020 The sky at my house in NKnoxCo is still mostly clear. . Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 18z NAM sounding @7p for the same general area...DP already below sounding Link to comment Share on other sites More sharing options...
John1122 Posted February 19, 2020 Share Posted February 19, 2020 High thin cirrus clouds here. Temp is 42.4 degrees 50 percent humidity and falling. Dew point temp is 24.8. Link to comment Share on other sites More sharing options...
snowmaker Posted February 19, 2020 Share Posted February 19, 2020 Sky is mostly clear here in northwest middle tn at the moment. Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 2 minutes ago, John1122 said: High thin cirrus clouds here. Temp is 42.4 degrees 50 percent humidity and falling. Dew point temp is 24.8. Interesting...NAM had 42/27 for northern plateau @6 cst Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 Will be interesting to see play out tonight...example: Athens area bottoms DP at 32 overnight on 18z NAM Link to comment Share on other sites More sharing options...
Chattownsnow Posted February 19, 2020 Share Posted February 19, 2020 Temp and Dew here north of Chattanooga. Hoping Jeff’s inverted trough hopes pan out here. I’m living under overcast skies right now Link to comment Share on other sites More sharing options...
John1122 Posted February 19, 2020 Share Posted February 19, 2020 3 minutes ago, TellicoWx said: Interesting...NAM had 42/27 for northern plateau @6 cst I noticed the dp is also 24 in Crossville. Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 3 minutes ago, John1122 said: I noticed the dp is also 24 in Crossville. So seems most people are running ~3° colder currently on dews vs the coldest model. Yeah I definitely think you guys go WWA if radiational cooling stays on track. Link to comment Share on other sites More sharing options...
Wurbus Posted February 19, 2020 Share Posted February 19, 2020 Pretty good increase on the GEFS mean for this system at 18z. For reference, there was no blue in TN on the 12z mean outside a very small sliver in NE TN. Link to comment Share on other sites More sharing options...
McMinnWx Posted February 19, 2020 Share Posted February 19, 2020 Currently at 47 here in Athens. Don’t know if I’m reading the DP correctly, but WC app says 30. Link to comment Share on other sites More sharing options...
tnwxwatcher Posted February 19, 2020 Share Posted February 19, 2020 Location Knoxville off Pleasant Ridge road:My current observations are:Temp: 47° / Humidity: 54% / Dewpoint: 31°temp and dewpoint are falling steadily Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
TellicoWx Posted February 19, 2020 Share Posted February 19, 2020 2 minutes ago, McMinnWx said: Currently at 47 here in Athens. Don’t know if I’m reading the DP correctly, but WC app says 30. Sounds right...PWS in Athens is 49/31 Link to comment Share on other sites More sharing options...
PowellVolz Posted February 20, 2020 Share Posted February 20, 2020 I thought my DP was wrong but it might be right sitting at 46/26. Link to comment Share on other sites More sharing options...
TellicoWx Posted February 20, 2020 Share Posted February 20, 2020 Dont quite remember a spread this big on the EPS 24hrs or less out....0" to 6" lol Link to comment Share on other sites More sharing options...
dwagner88 Posted February 20, 2020 Share Posted February 20, 2020 48/39 on my PWS right now. That’s not very encouraging. DP seems far too high. Link to comment Share on other sites More sharing options...
ShawnEastTN Posted February 20, 2020 Share Posted February 20, 2020 My dewpoint definitely falling. Was 29 at at 530 now down to 27. Temp 46.Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
TellicoWx Posted February 20, 2020 Share Posted February 20, 2020 18z Euro: Link to comment Share on other sites More sharing options...
Kasper Posted February 20, 2020 Share Posted February 20, 2020 1 hour ago, TellicoWx said: Will be interesting to see play out tonight...example: Athens area bottoms DP at 32 overnight on 18z NAM Athens an hour ago was 30.5 DP now sitting at 28.1! Link to comment Share on other sites More sharing options...
Holston_River_Rambler Posted February 20, 2020 Author Share Posted February 20, 2020 down to 41/ 32 now Link to comment Share on other sites More sharing options...
Holston_River_Rambler Posted February 20, 2020 Author Share Posted February 20, 2020 Some mid twenty dewpoints just north of me though Link to comment Share on other sites More sharing options...
McMinnWx Posted February 20, 2020 Share Posted February 20, 2020 2 minutes ago, Kasper said: Athens an hour ago was 30.5 DP now sitting at 28.1! What would ideal conditions be for Athens? Link to comment Share on other sites More sharing options...
Kasper Posted February 20, 2020 Share Posted February 20, 2020 Just now, Holston_River_Rambler said: Some mid twenty dewpoints just north of me though They should come down fairly quickly I think this evening based on current upstream OBV Link to comment Share on other sites More sharing options...
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