116 FXUS63 KLMK 211910 AFDLMK Area Forecast Discussion National Weather Service Louisville KY 310 PM EDT Tue Apr 21 2020 .Short Term...(This evening through Wednesday) Issued at 252 PM EDT Tue Apr 21 2020 Gusty westerly to northwesterly winds will begin to subside some late this afternoon and evening as high pressure builds in from the west. Skies will remain clear overnight, and with light to variable winds and dry air in place, temperatures will fall well into the 30s via excellent radiational cooling. The frost advisory has been expanded slightly westward, but still largely remains east of the I- 65 corridor as the best conditions for widespread frost will be in close proximity to the surface high. West of the I-65 corridor, frost is still possible, especially in confined valleys, but the potential for widespread frost is not as high. After a cold start to the day tomorrow, temperatures will warm up very quickly as southerly flow picks up in response to surface high pressure over eastern Kentucky. Clouds will also be on the increase ahead of our next system, and we may see enough moisture move in to generate a few showers well west of I-65 by early evening. Appears most of the rain will hold off until after sunset at this time. && .Long Term...(Wednesday night through Tuesday) Issued at 300 PM EDT Tue Apr 21 2020 Stacked low pressure system over Oklahoma tracks right over the County Warning Area (CWA) on Thursday. Rain showers and occasional thunderstorms could be possible into the afternoon. As the system moves into the Mid-Atlantic Thursday night into Friday the rain exits from west to east and is done for all locations by Friday daybreak. Rain amounts with this system will range from an inch to a few areas getting up to near 2 inches. Friday is a buffer between storm systems and will be dry and warm despite a north-northeasterly wind. Afternoon temperatures will reach the upper 60s to near 70. Rain showers and possible thunderstorms begin to push in across the region ahead of the next system Friday evening/night. This system takes nearly the same path as Thursday's storm system right over the Ohio River. Showers and a few thunderstorms are possible during the day Saturday. Storm system slowly exits out Sunday morning but there could be a slight chance of lingering rain showers. Temperatures behind this departing low will drop temperatures down into the mid/upper 50s. High pressure will drop in across the Ohio Valley on Monday to give us a slight break but another system is prog to arrive for the end of the period on Tuesday. Confidence is low as there is wide spread model discrepancies on timing and location of this system on Tuesday. && .Aviation...(18Z TAF Issuance) Issued at 101 PM EDT Tue Apr 21 2020 VFR conditions expected through the forecast period. Gusty post- frontal winds have climbed over 30kts at some locations this afternoon, and could persist for the next few hours before subsiding late this afternoon and evening. High pressure will build in from the west and winds will become light and variable overnight. The high will move east of the region by tomorrow morning and winds will shift to the south in response after sunrise. && .LMK WATCHES/WARNINGS/ADVISORIES... IN...Frost Advisory from 2 AM to 10 AM EDT Wednesday for INZ077>079- 091-092. KY...Frost Advisory from 2 AM EDT /1 AM CDT/ to 10 AM EDT /9 AM CDT/ Wednesday for KYZ029>043-045>049-053>057-064>067-077-078- 082. && $$ Short Term...DM Long Term...BTN Aviation...DM