Sunrise 5:38 AM   Sunset 7:59 PM Moonrise 3:12 AM   Moonset 1:17 PM

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LMZ522 Expires:202405030800;;514931 Fzus53 Kgrb 022306 Nshgrb
nearshore marine forecast national weather service green bay wi 605 pm cdt Thu may 2 2024
for waters within five nautical miles of the shore on lake michigan
lmz521-522-030800- green bay south of line from cedar river to rock island passage and north of a line from oconto wi to little sturgeon bay wi- green bay south of line from oconto wi to little sturgeon bay wi- 605 pm cdt Thu may 2 2024
Tonight - E wind 10 to 15 kts veering sw 5 to 10 kts after midnight. Patchy fog. A chance of rain showers and a slight chance of Thunderstorms. Waves 1 to 3 ft. Friday - SW wind 5 to 10 kts. Partly cloudy in the morning then clearing. Waves 2 ft or less. Friday night - S wind 5 to 10 kts. Clear. Waves 2 ft or less. Saturday - E wind 5 to 10 kts. Mostly cloudy. Waves 2 ft or less.

LMZ500
No data

FXUS63 KGRB 022023 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 323 PM CDT Thu May 2 2024

Forecast discussion for routine afternoon forecast issuance

KEY MESSAGES

- Scattered showers and a few thunderstorms will develop ahead of a cold front tonight. No severe weather is expected.

- Due to recent and upcoming rainfall, rivers and streams will continue to rise late this week. Some rivers are forecast to remain at or reach bankfull stage.

- Light showers are possible Saturday into Saturday night, with more widespread shower and thunderstorms possible Tuesday into Wednesday.

DISCUSSION
Issued at 323 PM CDT Thu May 2 2024

Short Term...Tonight and Friday

Precipitation chances continue tonight, with much drier conditions expected on Friday.

A large area of showers associated with strong H8 WAA and a short-wave trough will continue to lift north out of the region late this afternoon. Low pressure over NE IA with lift northeast into the forecast area this evening, and drag a weak cold front through the region overnight. Showers, abundant cloud cover and east winds have combined to maintain a stable air mass over GRB CWA this afternoon, though weak elevated instability (H8 LI's of 0 to -2 C) will lift into the region this evening then shift east as the cold front shifts east later tonight. Scattered showers and a few storms are expected to develop ahead of the front, though the general trend is for a less rainy night than was earlier expected. Lows tonight will be in the 40s and lower 50s.

On Friday, high pressure and a much drier air mass will move into the forecast area. Deep mixing will promote warm temperatures in the upper 60s to middle 70s, west winds gusting to 20 to 30 mph (strongest in northern WI) and low relative humidity in the sandy soil areas. Today's rain should mitigate any fire weather concerns.

Long Term...Friday Night Through Thursday

Dry high pressure will linger through Friday night, but a weak inverted surface trough and short-wave will bring a chance of showers on Saturday and Saturday evening. This is looking like a light precipitation event at this time.

High pressure moves back into the region Sunday into Monday, with another round of mild temperatures and low humidity expected.

A deep upper level low over the Northern Plains will lift potent short-wave energy into the western Great Lakes late Monday night through Tuesday night, bringing good potential for a round or two of showers and storms. The remnants of this system will linger near the region late in the week, with smaller chances of showers and storms.

AVIATION
for 18Z TAF Issuance Issued at 1243 PM CDT Thu May 2 2024

Widespread rain is impacting the region at issuance time, with flight conditions deteriorating to MVFR/IFR in the steadier/heavier showers. This looks to continue at the western TAF sites, but we'll likely see a break in the showers for a while in eastern WI during the mid to late afternoon.

A weak low pressure system and associated warm front and cold frontal passage will produce numerous showers and a few thunderstorms this evening, with shower activity ending with the passage of the cold front overnight. Widespread MVFR/IFR conditions are anticipated. Clearing skies will occur from west to east late tonight into early Friday, and gusty west winds will pick up Friday morning.

Pockets of LLWS are expected this afternoon and evening.

GRB WATCHES/WARNINGS/ADVISORIES
None.

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