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Area Forecast Discussion
Issued by NWS La Crosse, WI
Issued by NWS La Crosse, WI
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019 FXUS63 KARX 191712 AFDARX Area Forecast Discussion National Weather Service La Crosse WI 1212 PM CDT Fri Jul 19 2024 .KEY MESSAGES... - Valley fog This morning. Rivers will continue to fall. High pressure will keep the area dry through tonight. - An upper level trough will linger across the area for the weekend and much of next week. Diurnal showers and storms will be seen mainly during the afternoon and evening. With weak shear and limited instability, not anticipating organized severe weather. && .DISCUSSION... Issued at 241 AM CDT Fri Jul 19 2024 Through Tonight... The combination of light winds and low level moisture has resulted in the development of valley fog. This fog is most prevalent in the Mississippi tributaries. There is still some uncertainty on whether this fog will impact KLSE or not. This fog should rapidly dissipate between 830 am and 930 am. During the late morning and afternoon, there will likely be scattered diurnal cumulus. With the soundings showing a rather warm layer between 800 and 600 mb, kept the forecast dry. Saturday through Next Week... An upper level trough will move southeast into the region on Saturday and linger over the area through Monday. Another upper level low will drop southeast into this trough on Tuesday. This trough will linger over the area into Thursday and then eject east as the western upper level ridge builds east into the Mississippi River Valley. This trough will produce diurnal showers and storms. The highest rain chances look to be on Sunday, Tuesday, and Wednesday. Shear remains weak and slightly below-normal temperatures will limit instability. The CSU Severe Probability forecasts remain very low across the region, so not expecting any organized severe weather. && .AVIATION /18Z TAFS THROUGH 18Z SATURDAY/... Issued at 1209 PM CDT Fri Jul 19 2024 VFR conditions are favored to prevail over the next 24 hours. Only potential exception looks to be fog at LSE tomorrow morning but probability is too low for a mention with this update. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && $$ DISCUSSION...Boyne AVIATION...Ferguson