Lappe Nordic Centre Snow Report

949 FXUS63 KGRB 140701 AFDGRB Area Forecast Discussion National Weather Service Green Bay WI 201 AM CDT Mon Sep 14 2026 Forecast discussion for routine morning forecast issuance .KEY MESSAGES... - Chilly temperatures in the mid 30s will cause widespread frost across northern WI early morning. - A round or two of heavy rain and storms is expected this afternoon through Tuesday. Rainfall amounts of 2 to 3 inches are possible across central and east-centrla WI. The severe weather threat is low. - Hazardous conditions for small craft return this afternoon and continue into Tuesday. Small Craft Advisories or a Gale Watch is in effect this afternoon and tonight. Additional marine headlines will be needed on Wednesday due to gusty winds or diminishing waves. - High waves will lead to an increased risk of rip currents at Lake Michigan beaches this afternoon into Tuesday afternoon where a Beach Hazardous Statement is in effect. && .DISCUSSION... Issued at 158 AM CDT Mon Sep 14 2026 Forecast for a a round or two of heavy rain this afternoon through Tuesday morning remains on track. A strong low pressure system is evident on WV imagery over the northern Rockies early this morning. This system will progress east into the northern Plains today with strengthening southerly flow ahead of the low drawing seasonally high moisture into the region. Expect rain to initially push into central WI during the early afternoon, however, the exact timing for the onset of precipitation remains somewhat uncertain as forecast soundings do show dry air in the low-levels that will need to be overcome. This initial round will likely be light to moderate widespread rain that spreads across the area by afternoon. A second round of rain is then expected beginning this evenings over central WI as a strong LLJ pushes noises into the region. This second round is expected to bring a more focused area of moderate to heavy rain to central and east- central WI late this evening and overnight. Between these two rounds of rain HREF LPMM 24hr rainfall totals show a corridor of 2-3" totals south of a line from Wausau to Sturgeon Bay with 0.5 to 1" north of that line. The exact placement of this higher end corridor may still shift north or south slightly. A few embedded thunderstorms are possible with this system, but weak instability keeps the severe threat low. Rain will come to an end from west to east Tuesday morning high pressure them bringing dry conditions for the remains of Tuesday and much of Wednesday. For the remainder of the week a baroclinic zone is expected set up over or just south of the forecast area. This will keep a 40-70% chance for showers and occasional thunderstorms Wednesday afternoon through next weekend, however, it will likely not rain that entire period. Temperatures will hover near to slightly below normal next week depending on where the boundary sets up each day. && .AVIATION...for 06Z TAF Issuance Issued at 1106 PM CDT Sun Sep 13 2026 VFR conditions persist through Monday afternoon, before conditions deteriorate Monday evening into early Tuesday. Skies will be mostly clear rest of tonight with areas of frost over north-central and far northeast WI late tonight. Winds will be light and variable. On Monday, rain will arrive from the west in the afternoon and evening, with scattered thunderstorms embedded in the large area of rain. Even with the rain, conditions through 00z Tuesday should remain VFR. Southeast winds will increase on Monday, with gusts over 20 kts on Monday afternoon. Rain with embedded thunder will continue statewide. CIGS are likely to drop into the MVFR category on Monday evening, with areas of IFR CIGS developing through the night central to north- central WI. Local IFR-MVFR visibility will also occur. The rain should end late Monday night into early Tuesday morning, but CIGS will only slowly improve on Tuesday. && .MARINE... Issued at 158 AM CDT Mon Sep 14 2026 Strengthening southerly winds today will lead to hazardous boating conditions on Lake Michigan and Green Bay. Strongest winds, with gale force gusts are expected late this afternoon through Tuesday morning. During the period waves on Lake Michigan may reach 12+ ft. While winds won`t be as strong Tuesday afternoon gusts of 20-25kts will continue to create conditions hazardous to small craft. With the high waves strong rip currents are also expected to create dangerous swimming conditions at Lake Michigan beaches. && .GRB WATCHES/WARNINGS/ADVISORIES... Frost Advisory until 8 AM CDT this morning for WIZ005-010>013- 018-019-021. Beach Hazards Statement from this evening through Tuesday evening for WIZ022. Beach Hazards Statement from this afternoon through Tuesday afternoon for WIZ040-050. && $$ DISCUSSION.....GK AVIATION.......JLA MARINE.........GK