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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:00AM | Sunset 7:52PM | Tuesday August 20, 2019 8:06 PM CDT (01:06 UTC) | Moonrise 10:27PM | Moonset 10:48AM | Illumination 71% |  |
LMZ543 Expires:201908210515;;947766 Fzus53 Kgrb 202034 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 334 Pm Cdt Tue Aug 20 2019 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz541>543-210515- Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 334 Pm Cdt Tue Aug 20 2019
Tonight..S wind 5 to 10 kts veering sw, then veering nw after midnight. Waves 2 ft or less. Patchy fog. A slight chance of showers and Thunderstorms.
Wednesday..N wind 10 to 15 kts. Waves 1 to 2 ft. Partly cloudy in the morning then clearing.
Wednesday night..N wind 5 to 10 kts. Waves 2 ft or less. Mostly clear.
Thursday..NE wind 5 to 10 kts. Waves 2 ft or less. Mostly Sunny.
Tonight..S wind 5 to 10 kts veering sw, then veering nw after midnight. Waves 2 ft or less. Patchy fog. A slight chance of showers and Thunderstorms.
Wednesday..N wind 10 to 15 kts. Waves 1 to 2 ft. Partly cloudy in the morning then clearing.
Wednesday night..N wind 5 to 10 kts. Waves 2 ft or less. Mostly clear.
Thursday..NE wind 5 to 10 kts. Waves 2 ft or less. Mostly Sunny.
LMZ543
7 Day Forecast for Marine Location Near Reedsville, WI
Hourly EDIT Helplocation: 44.18, -88 debug
Area Discussion for - Green Bay, WI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kgrb 202339 afdgrb area forecast discussion national weather service green bay wi 639 pm cdt Tue aug 20 2019 updated aviation portion for 00z TAF issuance Short term Tonight and Wednesday issued at 213 pm cdt Tue aug 20 2019 skies were mostly cloudy across the region this afternoon. Temperatures were in the lower to middle 70s across central and north-central wisconsin to around 80 across northeast and east-central wisconsin. For tonight, a cold front will drop south across the area. This feature will bring a small chance of showers and thunderstorms as it moves across the area. A few stronger storms are possible late this afternoon and early this evening across central and north-central wisconsin. Shear values of 25 to 35 knots noted along with cape values of 1,000 to 1,5000 j kg. Main risk would be gusty winds and small hail. The chances of showers and storms will end from northwest to southeast tonight, ending across eastern wisconsin after midnight. Late tonight, there may be a band of low clouds that drop south along with some patchy fog north and west of the fox valley. Any fog should burn off by mid-morning on Wednesday. Partly cloudy skies will prevail with highs in the 70s. Dewpoint readings will be in the 40s north and in the upper 40s to middle 50s south tomorrow afternoon. Long term Wednesday night through Tuesday issued at 213 pm cdt Tue aug 20 2019 the long term period will be largely dominated by a passing upper level ridge, and the next trough moving through by the end of the weekend. Thursday, a fairly prominent upper level trough will pass over the region, bringing rain and storms south of the area in the afternoon and evening. The gfs ECMWF have begun to hint that a few showers may be possible across east-central wi and the southern fox valley in the afternoon, but with the lack of |
moisture and instability, stuck with the drier guidance for this issuance. Thursday night, high pressure will dominate the region as the upper level ridge moves in. Northerly flow will bring much colder air into the region. Winds near calm by Friday morning could allow the north-central cool spots to drop quickly before sunrise. Therefore went with the coolest guidance for the area, and temperatures in the middle 30s for the lows for the north. High pressure will then dominate the region through Saturday night, keeping the area dry. Return flow on the west side of the high will gradually bring in warmer temperatures again on Saturday. The speed the ridge moves through will largely dictate how quickly precipitation moves in Sunday into Monday. Currently, a slowly deepening upper level trough is expected to develop and move across minnesota Saturday night into Sunday morning. Guidance then remains a bit unclear as to how quickly this feature will bring pops into central wisconsin. Kept a few chances in by the early portion of the day. A surface low is expected to develop with the upper level feature and deepen on Sunday, before progressing eastwards across the area by Sunday night. The low then lingers on into Monday. This will be the best chance to see storms develop in the extended period, but it's still too early to determine any severe potential. Temperatures will be below normal through Friday, then rise back up to near normal by Monday and Tuesday. Aviation For 00z TAF issuance issued at 639 pm cdt Tue aug 20 2019 a cold front will move across the area tonight. It may be accompanied by a few hours of MVFR cloudiness and possibly a light rain shower. Vfr conditions are expected Wednesday and Wednesday night with mostly clear skies and excellent visibility. Grb watches warnings advisories None. Short term... ..Eckberg long term... ... Uhlmann aviation... ... .Rdm |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| KWNW3 - 9087069- Kewaunee, WI | 33 mi | 48 min | S 6 G 7 | 69°F | 1012.1 hPa | |||
| SGNW3 - Sheboygan, WI | 34 mi | 66 min | S 8 G 8.9 | 71°F | 1012.9 hPa (-0.5) | 70°F | ||
| 45014 | 45 mi | 36 min | SW 3.9 G 5.8 | 80°F | 74°F | 1012.6 hPa |
Wind History for Kewaunee MET, WI
(wind in knots) EDIT (on/off) Help| 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | S G4 | -- | -- | W | S | W | -- | NW | NW | NW | -- | NW G4 | S | S | S G7 | SE G4 | S | S | S | S | S | S | SW G7 | S |
| 1 day ago | SW G6 | W | W G7 | NW G4 | W | NW | W | NW G5 | NW G5 | NW | NW G6 | NW | NW G6 | E | SE | SE G5 | SE | S | S | S | S | S | S | S |
| 2 days ago | SW | S | S | -- | -- | S | S G6 | S G11 | S | S | SE | S | S | S | S | S | SW G15 | SW G17 | W G20 | W G16 | W G19 | W G17 | W G14 | W G10 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| 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 | 72°F | 69°F | 91% | 1013.2 hPa |
| Green Bay, Austin Straubel International Airport, WI | 22 mi | 13 min | SW 4 | 10.00 mi | Fair | 77°F | 69°F | 77% | 1012.4 hPa |
Link to 5 minute data for KMTW
Wind History from MTW (wind in knots)
| 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | Calm | Calm | Calm | Calm | Calm | Calm | Calm | S | SW | E | SE | SE | SW | SE | SE | SE | Calm | |||||||
| 1 day ago | SW | W | W | NW | NW | Calm | N | Calm | Calm | SE | E | SE | SE | SE | S | E | S | Calm | ||||||
| 2 days ago | S | Calm | Calm | S | S | S | SE | S | SE | S | S | S | E | SW G18 | W G17 | W G18 | SW G16 | W G19 | W G18 | W | SW | SW |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
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GOES 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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
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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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 numerious 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. |