Lappe Nordic Centre Snow Report

770 FXUS63 KGRB 040600 AFDGRB Area Forecast Discussion National Weather Service Green Bay WI 100 AM CDT Sun Oct 4 2026 Forecast discussion for routine morning forecast issuance .KEY MESSAGES... - Areas of frost possible over north-central and far northeast Wisconsin late tonight into Monday morning, with patchy frost making it into portions of central Wisconsin at times. A Frost Advisory has been issued. - Decreasing frost potential Monday night, though frost chances return toward the end of the week. - Prolonged stretch of dry and seasonable weather expected through most of this week. && .DISCUSSION... Issued at 100 AM CDT Sun Oct 4 2026 Radar currently shows showers hastily departing the forecast area early this morning as LLJ ejects to the northeast and rain outruns better forcing along the front. Showers should completely exit by around 08Z, though remnant moisture under shallow inversion should keep some low clouds around through most of the morning. Skies should then clear out this afternoon as winds shift to the northwest and cooler, more stable air filters in. Frost/freeze potential... Par for the course, frost potential on track for late tonight into Monday morning as high sits overhead, winds decrease, and windows for clearing occur. MOS guidance once again showing solid signal for temperatures in the low to mid 30s over portions of north-central to far northeast Wisconsin, with a couple cold spots along the Upper Peninsula border even dropping below freezing. Have opted to throw out a Frost Advisory for areas north of Hwy 29 where confidence is greatest (60 to 90%) for temperatures below 36 degrees. Similar to previous nights, possibility exists for an upgrade to Freeze Warning for a county or two, though forecast lows below freezing were not widespread enough to do so on this shift. Would also not be surprised to see some shallow ground fog around early Monday morning due to high RHs. Frost threat decreasing for Monday night as gradient winds increase and mid clouds stick around. Dry pattern ahead... Ridge of high pressure will be the main driver of the synoptic pattern through the extended, with ensembles continuing to move the mid-week cold front through our area mostly dry. Beyond that, not seeing any strong signals for organized systems through at least the middle of the month. With frost/freeze headlines already in play, this may result in increasing fire weather concerns over the next several weeks due to current drought status and increasing fine fuels. && .AVIATION...for 06Z TAF Issuance Issued at 1049 PM CDT Sat Oct 3 2026 Rain will exit eastern WI around 06z. Otherwise will be watching for MVFR CIGS to develop across the north overnight, especially at KRHI. The low CIGS across the north should dissipate quickly by 15z with sunny skies expected across the entire area through the afternoon. Northwest winds of 10 to 15 knots with gusts of 20 to 25 knots should be expected after 14z Sunday. Winds will quickly drop off towards 00z Monday. && .MARINE... Issued at 100 AM CDT Sun Oct 4 2026 Winds and waves remain elevated on the Bay and Lake early this morning, with winds gusting to 25 mph and waves 4 to 5 ft. Waves should continue to build to 4 to 7 ft (highest near Death`s Door) through around 12Z. Winds then subside and shift to the northwest after 15Z, during which marine hazards will come to an end. && .GRB WATCHES/WARNINGS/ADVISORIES... Frost Advisory from 2 AM to 8 AM CDT Monday for WIZ005-010>013- 018>021-030-073-074. && $$ DISCUSSION.....Goodin AVIATION.......Eckberg MARINE.........Goodin