Monday, July13, 2020
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Marine Weather and Tides
Suamico, WI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:18AMSunset 8:37PM Monday July 13, 2020 10:30 PM CDT (03:30 UTC) Moonrise 12:43AMMoonset 1:53PM Illumination 37% Phase: Third Quarter Moon; Moon at 23 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LMZ522 Expires:202007141015;;809815 Fzus53 Kgrb 140151 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 851 Pm Cdt Mon Jul 13 2020 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz521-522-141015- 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- 851 Pm Cdt Mon Jul 13 2020
Tonight..S wind 5 to 10 kts. Waves 2 ft or less. Becoming partly cloudy.
Tuesday..S wind 10 to 20 kts with a few gusts to 25 kts. Waves 1 to 3 ft. A slight chance of showers and Thunderstorms in the afternoon.
Tuesday night..S wind 10 to 20 kts veering sw 10 to 15 kts after midnight. Waves 1 to 3 ft. Showers and Thunderstorms.
Wednesday..W around 10 kts veering nw 10 to 15 kts during the morning, then veering ne during the afternoon. Waves 2 ft or less. A chance of showers and Thunderstorms.
LMZ522


7 Day Forecast for Marine Location Near Suamico village, WI
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location: 44.66, -87.95     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 132251 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 551 PM CDT Mon Jul 13 2020

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Tuesday Issued at 256 PM CDT Mon Jul 13 2020

High pressure that kept us dry the past couple days is on its way out this evening. As return flow sets up on the lee side of the high tonight, southerly flow will develop a 30-40 knot low level jet across central Wisconsin. Rising dewpoints overnight combined with the LLJ with bring the development of some upper level showers late tonight. Deep layer shear around 30 to 35 knots could organize a few of the elevated storms long enough to produce a few areas of small hail, mainly across central to north-central WI. Once the LLJ begins to weaken Tuesday morning however, most of the convective storms are expected to diminish into showers by late morning, leading to a break before storms redevelop later on Tuesday. Low temperatures tonight will fall into the lower to middle 60s.

Tuesday . A few showers may still be in place across the region, along with a few areas of upper level cloud cover. The main event will be in the afternoon as a cold front moves into north-central and central WI. Precipitation will be mainly focused away from the Fox Valley through the evening, before the front finally makes its way eastwards Tuesday night. PWATs will push upwards of 1.5-2 inches, making heavy rainfall a good possibility for much of the area. The strength of severe weather remains somewhat uncertain for the region however. Deep layer shear remains 35 to 50 knots through the late afternoon, which will provide some organization to developing storms. Low level helicity around 200-300 will support developing mesocyclones and also suggests the potential for a brief spin up or isolated tornado in any stronger storms that develop, as low level vorticity will be fairly available to developing updrafts as well. The main uncertainty remains the availability of instability, as models continue to diverge on how the morning showers and cloud cover will impact the region ahead of the front. Overall, expect heavy rainfall to be very likely, with the potential for severe hail and wind to develop in stronger cells. The tornado threat is also present, but will be more isolated. SPC keeps us in the Marginal risk for most of the region, with the Slight risk extending into central WI from the southwest, where the best CAPE is, which seems very reasonable. The severe threat should begin to diminish in the late evening to early overnight hours, as the front crosses the region and diurnal instability begins to dissipate. High temperatures for Tuesday are expected to be in the lower 70s up north to the lower 80s near the Fox Valley.

LONG TERM. Tuesday Night Through Monday Issued at 256 PM CDT Mon Jul 13 2020

The threat for strong to severe storms will continue into Tuesday evening ahead of an approaching cold front, with the main threat transitioning to heavy rainfall during the overnight hours with the loss of daytime heating and the bulk of the instability.

The front will stall out over the area on Wednesday, providing a focus for additional showers and thunderstorms through Wednesday evening as a mid level shortwave rides along the frontal boundary. Unlike Tuesday, these storms are not expected to be severe as abundant cloud cover along the front is expected to put a limit on the amount of instability that is available during the afternoon and evening hours.

High pressure will then bring a period of dry weather to the western Great Lakes late Wednesday night, lasting through Friday morning. A low pressure system approaching the region from the west will bring the chance of showers and thunderstorms back to the area late in the week and into early next week. Temperatures during this period will once again rise well into the 80s, with highs this weekend approaching or exceeding 90 degrees across much of central, east-central and northeast Wisconsin. Depending on how much cloud cover lingers across the area with the aforementioned showers and thunderstorms, heat indices are expected to rise well into the 90s with a few 100 degree readings possible this next weekend. While the hot temperatures will bring an increase in instability, it is too early to determine if these storms are expected to be severe.

AVIATION. for 00Z TAF Issuance Issued at 543 PM CDT Mon Jul 13 2020

Tranquil flying conditions are expected this evening as the fair weather cumulus dissipate shortly after sunset. Main concern overnight will be thunderstorms across Minnesota and Iowa that are expected to move east into north-central and central Wisconsin towards 12z. Have included a period of thunderstorms in the KAUW/KCWA/KRHI towards 12z. This cluster of thunderstorms will weaken and may actually dissipate by the time it gets to KGRB/KATW/KOSH. Still some uncertainty if more convection moves into north-central Wisconsin later in the morning and continues through the day. For KGRB/KATW/KMTW, have kept the TAF period dry as showers and storms remain west and north of the area. Will need to monitor this area and may need to bump up the timing of showers and storms due to outflow boundaries causing convection to develop quicker than the models indicate. Some strong or severe storms are possible with gusts to around 50 knots are possible across portions of central and northeast Wisconsin if storms organize Tuesday afternoon and evening.

Looking ahead, could be a soaking rain, heavy rain at times, late Wednesday afternoon and Wednesday night across northeast Wisconsin.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Uhlmann LONG TERM . Kurimski AVIATION . Eckberg


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MN4 - 9087088 - Menominee, MI 36 mi61 min 77°F

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Green Bay, Austin Straubel International Airport, WI16 mi38 minSSE 610.00 miFair67°F59°F76%1015.1 hPa

Link to 5 minute data for KGRB

Wind History from GRB (wind in knots)
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Last 24hrCalmE5E4CalmCalmCalmCalmCalmCalmCalm--SE3CalmCalmCalm4CalmCalmS5SE7SE12SE9S5SE6
1 day agoNE15
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N8N7N5N5N6NE9N8N7N10NW8NE75NE4NE6N6NW5NW6NW3W3Calm
2 days agoW5NW5W6W6W7W7W6W6NW7NW5NW66NW7W7
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NW7NW6--N5W3N6N9

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of GreatLakes    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Green Bay, WI (23,6,7,8)
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Ground Weather Radar Station Green Bay, WI
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.