Area Forecast Discussion
Issued by NWS Jackson, KY

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849 FXUS63 KJKL 190819 AFDJKL AREA FORECAST DISCUSSION National Weather Service Jackson KY 419 AM EDT Thu Oct 19 2017 .SHORT TERM...
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(Today through Friday) Issued at 252 AM EDT THU OCT 19 2017 Strong ridging will continue to hold over the region through Friday with heights continuing to build. This will allow for a continued warming trend with highs into the mid 70s today and upper 70s by Friday. Overnight lows Thursday night will remain chilly with lows into the upper 30s to around 40 with ridges staying closer to the upper 40s. Area of dense valley fog will burn off by 10 am this morning with more dense valley fog expected tonight. .LONG TERM...(Friday night through Wednesday) Issued at 420 AM EDT THU OCT 19 2017 An anomalously strong upper ridge will be over the southeast CONUS as the period starts, providing dry and mild weather for the local area. An upper trough over the western CONUS will be heading east and butting up against the ridge, with a low expected to close off near the lower Mississipi Valley Sunday night. An associated surface low should also develop, with the system then tracking northeast toward the Great Lakes. The timing/track of this system is still in question. Although precip should occur with the system, exactly when is still a bit unclear, and have chosen to avoid categorical POPs. The upper low will be absorbed back into the westerlies as another substantial trough drops southeast toward the eastern CONUS early in the work week. This large scale trough will be responsible for a deep chilly air mass moving into the area. The heart of the cold air is expected to remain to our north, but it could still result in enough instability to allow showers to linger through the end of the period.
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&& .AVIATION...(For the 06Z TAFS through 06Z Thursday night) ISSUED AT 127 AM EDT THU OCT 19 2017 Mainly VFR conditions will be seen at the TAF sites through Thursday night. However, some dense valley fog will be seen overnight into early Thursday morning, then again late Thursday night. Light winds are expected through the period. && .JKL WATCHES/WARNINGS/ADVISORIES... NONE. && $$ SHORT TERM...KAS LONG TERM...HAL AVIATION...KAS is the U.S. government's official web portal to all federal, state and local government web resources and services.