Marine Forecasts

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7 Day Forecast for Marine Location Near Abrams, WI

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Area Discussion for - Green Bay, WI

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FXUS63 KGRB 122315 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 615 PM CDT Wed Aug 12 2020

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Thursday Issued at 245 PM CDT Wed Aug 12 2020

Convective activity associated with a weak upper trough should continue to dissipate as it moves into drier air across central and northcentral Wisconsin. It is possible that a brief shower could make it to Vilas county tonight, but think it should be dry. Increasing high clouds will keep low temperatues higher than the last couple days- close to seasonal normals.

Upper ridging moves into the region Thursday, with a weak surface high off to our east. This should result in mostly sunny skies and temperatures about five degrees above normal.

LONG TERM. Thursday Night Through Wednesday Issued at 245 PM CDT Wed Aug 12 2020

Forecast concerns mainly revolve around the thunderstorm potential on Friday night and Saturday when a cold front moves across the region. This cold front will mark a pattern change when a large trough will become established across the Great Lakes. No clear model preference, so will use a general model blend.

Thursday night through Friday night . A high pressure ridge axis will initially be centered across the region on Thursday night, but will gradually retreat to the northeast through Friday afternoon. Mid-level warm advection will be taking place on Thursday night, with some indications of convective clouds brushing across north- central WI. Both instability and moisture transport remains meager though, so will leave the forecast dry despite the GFS spitting out light qpf. A strong cold front will then move across the northern Mississippi Valley on Friday. Position of the front along with convective parameters suggest thunderstorm activity will remain well west of the region through 7 pm Friday. The remnants of this thunderstorm activity may approach north-central WI by late Friday night, but instability will likely have weakened significantly by this time. Highs on Friday will remain toasty in the middle 80s.

Rest of the forecast . The cold front will move across the region on Saturday. Still some timing differences, but potential exists for the front to impact the region near peak heating when instability could reach as high as 1000 to 1500 j/kg. Deep layer shear of 25-30 kts could generate a few strong storms if timing remains on track. Most of the storm activity will be exiting by early Saturday evening. A cooler and drier airmass will then gradually move into the region behind the cold front. Temps on Sunday will likely remain near 80 degrees, but then highs slowly fall into the upper 60s to middle 70s by Tuesday.

AVIATION. for 00Z TAF Issuance Issued at 615 PM CDT Wed Aug 12 2020

A few sprinkles or light showers are possible this evening across central and north- central WI as activity approaches from the west, but most of this should dry up before getting here. Did not mention -SHRA in any TAF sites as confidence and expected duration is low. Meanwhile, middle and high clouds will continue to advect into the area this evening and overnight, but VFR conditions should prevail with light winds out of the S/SE. Some uncertainty on how fast clouds clear out Thursday, but any ceilings will remain VFR.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . RDM LONG TERM . MPC AVIATION . KLJ

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
45014	11 mi	92 min	E 3.9 G 5.8	82°F			1016.6 hPa
MN4 - 9087088 - Menominee, MI	31 mi	44 min	SSE 6 G 7	76°F	72°F		1017.9 hPa	68°F
KWNW3 - 9087069- Kewaunee, WI	32 mi	44 min	S 9.9 G 11	67°F			1018.2 hPa
CBRW3 - Chambers Island, WI	44 mi	22 min	ESE 1.9 G 4.1	79°F

Wind History for Menominee, MI

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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	21 mi	69 min	SW 5	10.00 mi	Fair	81°F	62°F	53%	1018 hPa

Link to 5 minute data for KGRB

Wind History from GRB (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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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 (20,4,5,8)

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Ground Weather Radar Station Green Bay, WI

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