Lappe Nordic Centre Snow Report

345 FXUS63 KGRB 300502 AFDGRB Area Forecast Discussion National Weather Service Green Bay WI 1202 AM CDT Fri Oct 30 2026 Updated aviation portion for 06Z TAF issuance .KEY MESSAGES... - Spotty light rain (30-60% chances) for Halloween across central and east-central WI. Rainfall amounts less than 0.10 inch. - A slow moving low pressure system brings widespread showers (60-80%) and gusty winds from Monday afternoon through Wednesday, peaking on Election Day. The chance of showers lingers into Thursday. - The probability of 48 hour rainfall totals over 1" from Monday afternoon through Wednesday afternoon range from 50-80% north and west of the Fox Valley, and 40-50% over Fox Valley east to Lake Michigan. - Above normal temperatures should continue until late next week. && .DISCUSSION... Issued at 1144 PM CDT Thu Oct 29 2026 A band of mid clouds will move across northern Wisconsin overnight, which should allow temperatures to rebound in a few spots across the north where temperatures tanked earlier in the evening. Tranquil conditions will prevail on Friday into Friday night as above normal temperatures continue as high pressure slides east of the area. Attention then turns to Saturday and how far north the rain makes it into northeast Wisconsin. Precipitation will have to overcome a lot of dry air, so most of the rain (20-50% chance) should fall during the afternoon hours south of a line from Rhinelander to Sturgeon Bay. The chances (20-40%) of showers continue Saturday night across the entire area with mild and dry conditions expected on Sunday. Highs Sunday will be in the lower to middle 60s, while the normal high for this time of year is around 50 degrees. A slow moving low pressure will bring a chance of showers Monday afternoon, then a 60-80% chance of rain Monday night into Tuesday, with additional chances of rain into Wednesday and Thursday. Will need to watch high temperatures on Tuesday which may be a tad bit too warm based on the expected weather, although it will still be warmer than normal. Rainfall totals over an inch from Monday afternoon through Wednesday afternoon range from 50-80% north and west of the Fox Valley, with a 40-50% chance from the Fox Valley east to the lakeshore. The chances of showers will continue into Thursday, but precipitation amounts will be on the light. Temperatures will remain above normal the next week, though a bit of a cooldown (temperatures returning to around normal) occurs late next week after the low pressure system passes by. Available long range guidance points to above normal temperatures through most of November. Official forecast for meteorological winter (Dec through Feb) also favors above normal temperatures which is right in line with the ongoing very strong El Nino. && .AVIATION...for 06Z TAF Issuance Issued at 1202 AM CDT Fri Oct 30 2026 Generally good flying weather is expected through the taf period. Confluent mid-level winds across the northern Plains to western Great Lakes will lead to broken mid-level clouds with ceilings above 8 kft at times. At the surface, high pressure will become centered across the region. As a result, light surface winds can be expected through the TAF period. Outlook: As the high departs late Friday night into Saturday, expect ceilings to gradually fall to MVFR with light rain chances increasing generally after 12Z Saturday. && .MARINE... Issued at 1144 PM CDT Thu Oct 29 2026 A slow moving low pressure system will bring hazardous conditions Monday night into Tuesday night on the bay and Lake Michigan. Gusty winds and high waves will continue on Lake Michigan through Thursday. && .GRB WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION.....Eckberg AVIATION.......MPC MARINE.........Eckberg