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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 6:06AM | Sunset 7:41PM | Monday August 26, 2019 4:37 AM CDT (09:37 UTC) | Moonrise 1:23AM | Moonset 5:12PM | Illumination 18% |  |
LMZ522 Expires:201908261615;;228908 Fzus53 Kgrb 260929 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 429 Am Cdt Mon Aug 26 2019 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz521-522-261615- 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- 429 Am Cdt Mon Aug 26 2019
.small craft should exercise caution from this morning through Tuesday morning...
Today..SE wind 10 to 15 kts. Waves 1 to 3 ft. Scattered showers in the morning, then periods of showers in the afternoon.
Tonight..SE wind 10 to 20 kts veering S late this evening, then veering sw 10 to 15 kts after midnight. Waves building to 2 to 4 ft. Periods of showers and isolated Thunderstorms in the evening, then scattered showers after midnight.
Tuesday..W wind 10 to 20 kts. Waves subsiding to 1 to 3 ft. Partly cloudy in the morning then clearing.
Tuesday night..SW wind 15 to 25 kts. Waves 1 to 3 ft building to 2 to 4 ft after midnight. Mostly clear. A small craft advisory may be needed.
.small craft should exercise caution from this morning through Tuesday morning...
Today..SE wind 10 to 15 kts. Waves 1 to 3 ft. Scattered showers in the morning, then periods of showers in the afternoon.
Tonight..SE wind 10 to 20 kts veering S late this evening, then veering sw 10 to 15 kts after midnight. Waves building to 2 to 4 ft. Periods of showers and isolated Thunderstorms in the evening, then scattered showers after midnight.
Tuesday..W wind 10 to 20 kts. Waves subsiding to 1 to 3 ft. Partly cloudy in the morning then clearing.
Tuesday night..SW wind 15 to 25 kts. Waves 1 to 3 ft building to 2 to 4 ft after midnight. Mostly clear. A small craft advisory may be needed.
LMZ522
7 Day Forecast for Marine Location Near Abrams, WI
Hourly EDIT Helplocation: 44.75, -87.96 debug
Area Discussion for - Green Bay, WI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kgrb 260906 afdgrb area forecast discussion national weather service green bay wi 406 am cdt Mon aug 26 2019 forecast discussion for routine morning forecast issuance Short term Today... Tonight... And Tuesday issued at 406 am cdt Mon aug 26 2019 forecast concerns today revolve around rain and thunderstorm potential through late this evening. Some heavy rainfall is possible throughout the day. Satellite trends this morning continue to show widespread cloud cover across much of the north-central CONUS with only small breaks across mn ia. Two well defined shortwaves show up on WV imagery this morning. One is lifting east-northeastward across northern illinois into far southeast wi, while the other is sliding from near the sd NE border eastward into western ia. Radar trends show widespread rainfall under both of these shortwaves as well as a line of rain showers sliding across northern and western mn ahead of an approaching cold front as noted by wind a wind shift a drop in dewpoint from automated surface observations. Today and tonight: the forecast for this time period largely revolves around the two aforementioned shortwaves and approaching cold front. The first disturbance to impact the area will be the one approaching from northern illinois. This convectively-enhanced shortwave is potent enough that it has developed a surface low across northeast mo southeast ia this morning. Moisture has been steadily streaming northward ahead of the shortwave and surface low and widespread rainfall has been noted. Steady moisture transport northward along with isentropic upglide will continue to lead to a widespread steady rainfall across much of east-central into far northeast wi throughout the day as the surface low and shortwave shift into southern lake michigan. Farther west, across central into north-central portions of wi only isolated to scattered rain showers are expected through early afternoon. The main much deeper trough will dig across the northern plains this morning and then push eastward into western wi by 00z Tuesday. At the surface, a northern surface low will merge up with the southern lake michigan low and deepen at the same time that a vort MAX rounds the base of the upper- level trough. The associated cold front is forecast to move a bit slower and reach central wisconsin between 00z 27 and 03z 27. Along and ahead of the cold front, forcing and moisture will increase, allowing for better chances of showers and possibly a thunderstorm during the late afternoon and early evening hours across central wisconsin. The front is expected to shift eastward out of the area by 12z Tuesday taking the associated precipitation with it. Models are generally painting out around 500 j kg or less of mucape today, while deep layer wind shear values are expected to be around 20 to 30 kts along and just behind the front. Current thinking is that widespread cloud cover and rain showers today into this evening, will keep instability very low across the area and will likely be a major limiting factor for any strong to severe thunderstorms. Precipitable water values are expected to be nearly double the average for this time of year, with values in the 1.5 to 2.0 inch range. Again, this may lead to the potential for heavy rainfall under any thunderstorm that forms. Nudged high temperatures down to account for the increased cloud cover and precipitation potential today. Most locations will remain in the mid to upper 60s with a few locations across central and north- central possibly reaching 70. |
Tuesday: the stronger surface low will become nearly stationary over central quebec through this time, with the 500mb low vertically stacked. Multiple shortwave will pass through the area within this continued cyclonic flow through the middle of the work week. In fact, it looks like another vorticity MAX will slide into the northwest half of wisconsin Tuesday afternoon into Tuesday evening. This, along with daytime heating, will likely lead to another chance of showers and thunderstorms across central into north-central wisconsin Tuesday afternoon. Mid-level lapse rates are expected to steepen to between -7c km to -8c km during the afternoon along for a more unstable airmass. Freezing levels will fall to around 8000-9000 ft during that time period as well. Very little shear will be available, but it wouldn't be out of the question to see some small hail associated with any thunderstorm that pulses up. Temperatures will be a bit warmer Tuesday, with less precipitation around. Winds will also become fairly gusty out of the west with gusts up to 30 mph possible during better afternoon mixing. Most locations will warm into the upper 60s to low 70s; however, east-central into far northeast wi may see some mid 70s as downsloping westerly winds lead to some compressional warming. Long term Tuesday night through Sunday issued at 406 am cdt Mon aug 26 2019 once an approaching mid level trough passes, a closed 500 mb low is forecast to move from western ontario to hudson bay by late in the week. Some light showers are possible Tuesday night and Wednesday in cyclonic flow both at the surface and aloft. The cold cyclonic flow will also lead to much cooler temperatures on Wednesday, with highs expected to only be in the 60s. More zonal mid level flow will bring near normal temperatures back to the forecast area for Thursday and Friday. A cold front should bring a slight chance for showers to parts of the area Thursday night and Friday, but the rest of the forecast looks dry. Cooler temperatures are in store for the weekend in the wake of the cold front. Aviation For 06z TAF issuance issued at 1138 pm cdt Sun aug 25 2019 a storm system remains on track to impact the region later tonight into Monday evening, but details remain murky. It appears that the system will impact the area in pieces. The first piece may pass over the fox valley and lakeshore areas in the morning, with rain and isolated storms, and MVFR CIGS vsbys. More showers and storms then look possible across much of the area from late afternoon into Monday night as conditions fall to MVFR then ifr. It appears the showers across the eastern TAF sites look more likely this run, however there is still some doubt as to the timing of the second batch heading in from the west. Although thunderstorms will be possible at times Monday afternoon and evening, coverage is too isolated to include in this set of tafs. Grb watches warnings advisories Beach hazards statement through Tuesday morning for wiz022-040- 050. Short term... ..Cooley long term... ... Mg aviation... ... .Kurimski |
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 |
| 45014 | 11 mi | 37 min | SE 12 G 16 | 73°F | 70°F | 1014.7 hPa | ||
| MN4 - 9087088 - Menominee, MI | 31 mi | 49 min | SE 17 G 20 | 68°F | 71°F | 1014.7 hPa | ||
| KWNW3 - 9087069- Kewaunee, WI | 32 mi | 49 min | SSE 11 G 16 | 68°F | 1014.6 hPa |
Wind History for Menominee, MI
(wind in knots) EDIT (on/off) Help| 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 | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | -12 PM | 4 AM | |
| Last 24hr | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE G14 | SE | SE | SE | E | E | E | E | E | E | E | SE | SE | |
| 1 day ago | NE | NE | N | SW | E | E | SE | SE | SE G8 | E | E | SE | SE | E | SE | SE | E | E | E | E | SE | E | SE G16 | SE G16 |
| 2 days ago | N | NW G8 | NW | N G12 | N | N G11 | NE | NE G14 | NE | NE G9 | NE | NE | NE | NE | NE | NE | E | SE | E | E | NE | NE | NE G15 | E |
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 |
| Green Bay, Austin Straubel International Airport, WI | 21 mi | 2.7 hrs | E 5 | 10.00 mi | Light Rain | 65°F | 61°F | 87% | 1015.4 hPa |
Link to 5 minute data for KGRB
Wind History from GRB (wind in knots)
| 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 | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | |
| Last 24hr | N | N | Calm | Calm | SE | S | S | SE | SE G19 | SE G17 | SE G20 | SE | SE G21 | E | SE | SE | E | E | E | E | E | E | E | |
| 1 day ago | Calm | NW | Calm | N | N | E | E | E | E | SE | SE | SE | SE | SE | SE | E | E | E | Calm | Calm | Calm | Calm | ||
| 2 days ago | N | Calm | Calm | N | N | NE | NE | E | NE | N | NE | NE | NE | NE | NE | NE | Calm | Calm | Calm | W | Calm | Calm | NW |
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 (5,6,7,8)
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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. |