Marine Forecasts

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7 Day Forecast for Marine Location Near Green Bay, WI

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Area Discussion for - Green Bay, WI

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FXUS63 KGRB 112310 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 510 PM CST Wed Dec 11 2019

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Thursday Issued at 300 PM CST Wed Dec 11 2019

Subzero wind chills will continue tonight, but it will not be quite as cold as last, with increasing clouds and warm advection. Minimum temperatures will likely be during the evening hours. Some light snow may begin after midnight in the far north but accumulations should be less than an inch.

A solid snowfall is expected Thursday as a 130+ knot 300mb jet moves across southwest Wisconsin with the left exit region producing rising motion across the forecast area. A 50 knot low level jet will produce strong low level warm advection producing additional lift.

Temperatures near the surface and aloft are sufficiently cold so we do not have to worry about precipitation type with this system, though the snow could end as a little freezing drizzle as mid level moisture diminishes during the afternoon. A total snowfall of 2 to 5 inches looks likely for most places, with six inches or more in the far northeast and perhaps a bit less in the southern Fox Valley.

LONG TERM. Thursday Night Through Wednesday Issued at 300 PM CST Wed Dec 11 2019

An active pattern is setting up as several Pacific systems quickly move across the CONUS. One system to be exiting WI Thursday evening, followed by the next system (Friday night/Saturday). A third system to pass mainly to our south Sunday night/Monday before the mean flow splits over the eastern Pacific by the middle of next week and the weather quiets down. Temperatures are forecast to be above normal through Saturday, then pretty much stay below normal through the middle of next week.

Light snow may linger into early Thursday evening over eastern WI as the clipper/cold front move into Lower MI/southeast WI respectively. The rest of Thursday night will be dry with weak high pressure to reach western WI by daybreak. Time sections show plenty of low-level moisture to hang across northeast WI, thus mainly cloudy skies with patchy fog can be expected. Min temperatures to range from around 10 above zero north-central WI, lower to middle 20s east-central WI. This high pressure moves across the rest of WI Friday morning, however the approach of an elongated area of low pressure and a cold front, could bring a chance of light snow back to at least central WI by Friday afternoon. Still anticipate plenty of clouds over the region with max temperatures on Friday to range from the lower to middle 20s north-central, to around 30 degrees east-central WI.

This system is not a fast mover with the models only moving the broad area of low pressure/cold front into the western Great Lakes on Friday night. The chance for light snow would spread across northeast WI during the night, however lift/forcing/moisture are all rather weak, thus accumulations should be held at an inch or less by daybreak. Min temperatures to range from the middle to upper teens north-central, middle to upper 20s east-central WI. The chance of light snow would continue through at least Saturday morning until the low pressure/cold front pull farther east into Lower MI Saturday afternoon. An additional one-half to one inch of snow is possible before diminishing, with the exception of north- central WI where northwest winds may keep some lake effect snow showers in the forecast through the afternoon. Max temperatures to range from around 20 degrees north-central, to around 30 degrees east-central WI.

The lake effect snow potential would continue into Saturday night over north-central WI, but tend to diminish overnight as Canadian high pressure begins to build into WI. Some breaks in the clouds, plus the fresh snow pack, may take temperatures below zero again over north-central WI with single digit above zero elsewhere (except lower teens along Lake MI). The high pressure pushes into western WI by Sunday afternoon and should provide for mostly sunny to partly cloudy skies, albeit with well-below normal temperatures. Look for readings to only reach the upper single digits to lower teens central WI, middle to upper teens eastern WI.

Weather looks quiet Sunday night into Monday as one high pressure slips to our east, but another one builds across the Upper Midwest/central Plains. We are also still watching a system that is progged to develop over the southern Plains and lift northeast into the OH/TN Valleys on Monday. The GFS brushes southeast WI with light snow versus the ECMWF which keeps any snow south of the WI/IL border. Max temperatures for Monday to range from the middle teens north-central, to the lower 20s near Lake MI.

Models begin to have issues with the handling of additional Pacific energy and the amplitude of an upper-level ridge over the Rockies. While there does not appear to be any major systems that would impact northeast WI Tuesday or Wednesday, the GFS does send a cold front through WI on Tuesday and could bring some snow showers to the forecast area. The ECMWF does not even have this cold front in our vicinity on Tuesday. The amplitude issue with the upper ridge will determine how cold we get Tuesday night with another cold front expected by Wednesday afternoon. Temperatures will remain below normal through mid-week.

AVIATION. for 00Z TAF Issuance Issued at 457 PM CST Wed Dec 11 2019

Good flying weather expected through the evening hours. MVFR conditions and light snow will arrive late tonight across central and northcentral Wisconsin. IFR weather and snow is expected across the entire region Thursday. The heaviest snow and lowest flight conditions will be north of an AUW to SUE line. Snowfall totals will range from 5 to 7 inches across far northeast Wisconsin, to 3 to 6 inches across much of north-central Wisconsin, and 2 to 4 inches across portions of central and east- central Wisconsin.

GRB WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory from 3 AM to 6 PM CST Thursday for WIZ005-010-018>022-030-031-035>040-074.

Winter Storm Warning from 3 AM to 6 PM CST Thursday for WIZ011>013-073.

SHORT TERM . RDM LONG TERM . Kallas AVIATION . Kurimski

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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	26 mi	52 min	W 7 G 11	8°F			1031.4 hPa
MN4 - 9087088 - Menominee, MI	45 mi	52 min	SSW 8.9 G 12	7°F	35°F		1030.9 hPa	-2°F

Wind History for Kewaunee MET, WI

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W10 G14

W9 G17

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W7 G14

W6 G10

W6 G9

SW4 G7

W5 G10

W6 G10

W11 G18

W11 G17

W11 G18

W8 G18

W11 G16

W11 G19

W10 G15

W11 G16

W11 G15

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W7 G10

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1 day ago

N13 G17

N13 G22

NW10 G20

NW11 G15

NW11 G17

NW10 G21

NW11 G15

NW5 G11

NW7 G13

NW11 G17

NW9 G14

NW13 G17

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NW10 G16

W8 G13

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W13 G16

W10 G14

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W8 G13

W7 G13

2 days ago

NW1

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E6

NW1 G4

E8

E7 G10

E7 G10

NE6 G10

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NW4 G7

N5 G8

NW3 G6

NW4 G8

N5 G8

N2 G6

NW2 G7

N2 G6

NW5 G9

NW10 G17

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Green Bay, Austin Straubel International Airport, WI	8 mi	29 min	Var 3	10.00 mi	Fair	6°F	-6°F	57%	1034 hPa

Link to 5 minute data for KGRB

Wind History from GRB (wind in knots)

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W9

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W12 G20

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1 day ago

N17 G26

NW10

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NW15 G23

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NW9 G19

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W14 G22

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Calm

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N7

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N10

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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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GEOS Local Image of    EDIT
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 (19,4,5,8)

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Ground Weather Radar Station Green Bay, WI

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