Marine Forecasts

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7 Day Forecast for Marine Location Near Reedsville, WI

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Area Discussion for - Green Bay, WI

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FXUS63 KGRB 062331 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 631 PM CDT Thu Aug 6 2020

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Friday Issued at 257 PM CDT Thu Aug 6 2020

Diurnal cumulus developed across the forecast area this afternoon, and a few showers were ongoing near lake breeze boundaries in eastern WI. Temperatures were in the middle 70s to lower 80s, and humidities were quite comfortable, with dew points only in the upper 40s to middle 50s.

High pressure will edge east tonight into Friday, with ridging aloft keeping the region dry. Increasing south winds will aid in a gradual warmup. Cumulus clouds will dissipate by sunset, with patchy fog redeveloping again tonight. Lows are expected to drop into the 50s. On Friday, daytime cumulus will reform in the late morning and afternoon. South winds will gust to 15 to 20 mph, and highs will climb a few degrees into the upper 70s to middle 80s. A slight easterly component to the wind will keep lakeside readings several degrees cooler than inland locations.

LONG TERM. Friday Night Through Thursday Issued at 257 PM CDT Thu Aug 6 2020

The main focus of the long term period continues to be the storm chances over the weekend.

Friday night through Saturday night . The warm front is expected to continue to lift northwards until it stops across the Upper Peninsula of Michigan and northern Wisconsin. The ample moisture will then begin to be capitalized upon by a passing upper level shortwave starting early Saturday morning. With rain starting earlier in the day, we may struggle to get some of the better instability in the areas where rain and clouds are present. Although instability will increase some later in the day further east, moderate capping from the warm air aloft may suppress convection into the afternoon for most of the region, as the shortwave passes. The best dynamics associated with the shortwave will also be north of our area, over Lake Superior, and we have minimal shear to work with, which altogether is in favor of the region avoiding the best chances for severe weather. For now, expect the chance for some thunderstorms, possibly a stronger storm or two, but would stray away from severe. We are outlooked in the general thunder for now by SPC, with the marginal in western WI, and this seems reasonable.

Saturday night through Sunday . Rain chances will likely diminish overnight into Sunday as the shortwave heads east and diurnally driven convection dies out. The next chance for more organized convection will be along a cold front, which is not expected until Sunday night. A few diurnally driven storms are possible ahead of the cold front during the afternoon Sunday, as instability rises for the warmest day in the forecast. The front still remains somewhat uncertain, as models vary between a Sunday evening to early Monday morning arrival. The difference between the two will be fairly large, as the amount of diurnally driven instability available when the front arrives will vary greatly. Shear will be a little greater along the front, so this will continue to be the main thing to focus on in the upcoming forecast shifts.

Rest of the extended . Behind the cold front, whether it came through Sunday night or later Monday, high pressure will eventually return for the beginning to middle of next week, bringing back a drier period. Temperatures will moderate some, returning closer to normal in the upper 70s to lower 80s.

AVIATION. for 00Z TAF Issuance Issued at 631 PM CDT Thu Aug 6 2020

VFR conditions will continue through at least Friday evening, with scattered to broken clouds with bases between 4000 and 8000 feet during the afternoon and evening. There could be patchy ground fog for a few hours late tonight in northcentral Wisconsin, but there should be less than the last few days.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Kieckbusch LONG TERM . Uhlmann AVIATION . RDM

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
KWNW3 - 9087069- Kewaunee, WI	33 mi	48 min	SSW 5.1 G 8	72°F			1019.2 hPa
SGNW3 - Sheboygan, WI	34 mi	66 min	S 7 G 7	70°F
45014	45 mi	36 min	S 14 G 16	74°F			1017.7 hPa

Wind History for Kewaunee MET, WI

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Last 24hr

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Manitowoc, Manitowoc County Airport, WI	18 mi	10 min	N 0	10.00 mi	Fair	68°F	54°F	61%	1019.6 hPa
Green Bay, Austin Straubel International Airport, WI	22 mi	13 min	S 5	10.00 mi	Fair	69°F	53°F	57%	1019.2 hPa

Link to 5 minute data for KMTW

Wind History from MTW (wind in knots)

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Tide / Current Tables for

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Tide / Current Tables for

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Weather Map

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NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Green Bay, WI (21,6,7,8)

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Ground Weather Radar Station Green Bay, WI

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