Mt. Lacrosse snow report

119 FXUS63 KARX 150554 AFDARX Area Forecast Discussion National Weather Service La Crosse WI 1254 AM CDT Wed Jul 15 2026 .KEY MESSAGES... - Hazardous heat continues today with heat indices in the mid 90s to low 100s. - Smoke from Canadian and northern Minnesota wildfires will move over much of the forecast area today and again on Thursday. - Rain chances return Thursday afternoon (10 to 15%). && .DISCUSSION... Issued at 1254 AM CDT Wed Jul 15 2026 Staying Warm Through Late Week: The anomalous mid-upper level ridge seen degrading and stretching from the Upper Mississippi to Ohio River Valleys Tuesday night. Resultant warmest surface temperatures will bifurcate the forecast area, perpetuating ongoing Heat Advisories with heat indices nearing 100 degrees in these areas. Wildfire Smoke & Air Quality Impacts: Increasing forecast concern from near surface wildfire smoke concentrations through Thursday as northerly winds advect particulates from Canadian wildfires into the Upper Midwest. Current forecast confidence for synoptic convergence along the forecast area keeps gradient of smoke concentrations from southwest to northeast. Therefore, while Air Quality Alerts have been issued in Wisconsin, lower confidence in our southwestern peripheral counties of northeast Iowa may result in lack of Air Quality Alerts there and in additional counties of southeast Minnesota. Otherwise, have slightly decreased temperatures through Thursday in collaboration with neighboring offices due to increased wildfire smoke concentrations inhibiting incoming shortwave solar radiation. Precipitation Chances Thursday: Furthermore, as the north wind sags south, the moisture boundary suggests some chance for precipitation. While current confidence for storm initiation remains low to due overall lack of forcing, moist PWATs (1.25+) with little synoptic progression raises concerns of heavy rain should storms persist. && .AVIATION /06Z TAFS THROUGH 06Z THURSDAY/... Issued at 1254 AM CDT Wed Jul 15 2026 Valley fog will be around once again through the early morning hours. After the fog dissipates, smoke from Canadian and northern Minnesota wildfires moves in this afternoon and lingers through the day on Thursday. There is not enough confidence to put smoke in the TAFs but if confidence grows that this smoke will lower visibilities enough then smoke will be out in the TAFs. Light northwest winds this morning transition to light and variable for the afternoon and evening. There is a low chance (less than 10%) of showers and storms in portions of western Wisconsin this afternoon. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...Heat Advisory until 8 PM CDT this evening for WIZ029-032>034- 041>044-053>055-061. MN...Heat Advisory until 8 PM CDT this evening for MNZ079-086>088- 094>096. IA...Heat Advisory until 8 PM CDT this evening for IAZ010-011-030. && $$ DISCUSSION...JAR AVIATION...Cecava