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LMZ366 Expires:202312021015;;743591 Fzus63 Kmkx 020252 Glflm
open lake forecast for lake michigan national weather service milwaukee/sullivan wi 852 pm cst Fri dec 1 2023
for waters beyond five nautical miles of shore on lake michigan.
waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered.
Synopsis..
modest to brisk northeast winds will continue over the lake tonight as low pressure around 29.8 inches tracks from central illinois to lake erie. Light to modest east winds will then prevail for Saturday into Saturday night, as another weak low pressure area tracks from the great plains to around far southern lake michigan by Sunday morning. After the low passes, modest north to northwest winds will develop over the lake for late Sunday into Monday.
lmz261-362-364-366-563-565-567-868-021015- lake michigan from seul choix point to rock island passage 5 nm offshore to mid lake- lake michigan south of a line from seul choix point to the mackinac bridge and north of a line from charlevoix mi to south fox island 5 nm offshore- lake michigan from charlevoix to point betsie mi 5 nm offshore to mid lake- lake michigan from point betsie to manistee mi 5 nm offshore to mid lake- lake michigan from rock island passage to sturgeon bay wi- lake michigan from sturgeon bay to two rivers wi 5 nm offshore to mid lake- lake michigan from two rivers to sheboygan wi 5 nm offshore to mid lake- lake michigan from pentwater to manistee mi 5 nm offshore to mid lake- 852 pm cst Fri dec 1 2023
sheboygan wi to pentwater mi north...
Rest of tonight..Northeast winds 10 to 20 kt diminishing to 10 to 15 kt. Chance of rain and snow showers through early evening, then chance of rain showers overnight. Waves 2 to 4 ft.
Saturday..Northeast winds 10 to 15 kt becoming east. Waves 1 to 3 ft.
Saturday night..East winds 10 to 15 kt. Chance of rain and snow overnight. Waves 1 to 3 ft.
Sunday..East winds 10 to 20 kt becoming northeast. Rain with a chance of snow in the morning, then rain likely with a chance of snow in the afternoon. Waves 2 to 4 ft.
Sunday night..North winds 10 to 15 kt. Chance of rain showers in the evening. Waves 1 to 3 ft.
Monday..Northwest winds 10 to 15 kt becoming west. Waves 1 to 3 ft.
Monday night..Southwest winds 10 to 20 kt becoming south. Chance of rain showers. Waves 1 to 3 ft.
Tuesday..East winds 10 to 20 kt becoming north. Chance of rain showers. Waves 1 to 3 ft.
Wednesday..Northwest winds 10 to 20 kt becoming west. Waves 2 to 4 ft.

LMZ300
No data

FXUS63 KGRB 020406 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 1006 PM CST Fri Dec 1 2023

Updated aviation portion for 06Z TAF issuance

KEY MESSAGES
- Light snow accumulations could lead to some slippery roads late Saturday night into Sunday morning. A few inches of snow are possible.

- Light wintry precipitation is also possible Monday night into Tuesday morning.

DISCUSSION
Issued at 212 PM CST Fri Dec 1 2023

SHORT TERM...

Cloudy skies will remain in place across the region today as active weather accompanying a low pressure system moves across southern Wisconsin. Although the majority of any precipitation will remain south of the region, there is still a small window for some precipitation to work its way into our areas as weak forcing arrives in east-central WI. The column looks fairly cold during this time, so light flurries are expected to be the predominant precipitation type. That said, no accumulations or impacts are anticipated as ground will be warm, any snow will be quite light, and the window for precipitation will be brief.

Going into the overnight period, cloud cover will linger on across the region, which will make for a warmer night when compared to last night. Low temperatures are still expected to be in the teens across the northwoods and 20s near the Fox Valley.

Saturday will be a fairly quiet day during the day, with clouds remaining in place across the region. Temperatures will make a slow rise similar to today, with highs reaching the middle to upper 30s in the afternoon.

LONG TERM...
An area of low pressure and an upper level disturbance will bring snow and some rain Saturday night into Sunday. Latest model runs this morning were showing the soundings were colder to support more snow than the previous forecast. Several models would suggest 1 to 3 inches of snow, however the ECMWF model would not support these type of snowfall amounts except across portions of east- central Wisconsin. Looking at the snowfall total plumes for Green Bay would suggest near an inch of snow, thus trended snowfall totals up across central into northeast Wisconsin, but not as high as some of the highest model outputs. Boundary layer temperatures on Sunday will probably limit additional snowfall totals in the late morning and afternoon as the heavier precipitation moves east of the area.

A clipper system will bring a chance of light snow Monday night into Tuesday. There could be a little rain mixed in during the day Tuesday. Another clipper system could bring a small chance of light rain or snow Thursday into Friday across the north. High temperatures this week should be at or above normal.

AVIATION
for 06Z TAF Issuance Issued at 1000 PM CST Fri Dec 1 2023

VFR conditions and quiet weather are expected across most of the forecast area overnight, with the possible exception of occasional MVFR ceilings and flurries near Lake Michigan.
Developing east winds will cause MVFR ceilings to gradually overspread the forecast area from SE to NW Saturday into Saturday evening. Light snow is expected to develop over central WI later Saturday evening, with MVFR vsbys and IFR ceilings possible there late in the TAF period.

GRB WATCHES/WARNINGS/ADVISORIES
None.

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