Marine Weather and Tides
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:19AM||Sunset 4:42PM||Sunday January 17, 2021 12:55 AM CST (06:55 UTC)||Moonrise 11:13AM||Moonset 10:39PM||Illumination 15%|
7 Day Forecast for Marine Location Near Manitowoc, WIHourly EDIT Help
Area Discussion for - Green Bay, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KGRB 170420 AFDGRB
Area Forecast Discussion National Weather Service Green Bay WI 1020 PM CST Sat Jan 16 2021
Updated aviation portion for 06Z TAF issuance
SHORT TERM. Tonight and Sunday Issued at 239 PM CST Sat Jan 16 2021
Main forecast concern to be on light lake effect snow showers across north-central WI.
The 19Z MSAS surface analysis indicated an area of low pressure well to our east over extreme southeast Ontario. A weak trough extended westward from the low pressure through Upper MI to the northeast corner of MN. The radar mosaic showed one band of mainly lake effect running along the western shores of Lake MI with a mix of light rain and snow. Surface obs showed scattered lake effect snow showers moving into north-central WI from Lake Superior. Temperatures remained well above normal by mid-January standards.
Cyclonic flow and the west to east orientated surface trough to remain across the region tonight, thus at least some flurries will be possible from time to time. Lake effect snow showers/flurries from Superior to continue over north-central WI, although any accumulations would be very minor (one-half inch or less) due to the air mass aloft just not very cold (8H temperatures around -10C over western Lake Superior). Models continue to show a shortwave trough will dive from the northern Plains toward the mid-MS Valley by daybreak. This track would keep any light snow accumulations to our west, thus do not anticipate any snow from this feature. Otherwise, look for cloudy skies with min temperatures in the upper teens to around 20 degrees north-central WI, middle to upper 20s east-central WI.
Persistent northwest winds will keep the chance for lake effect snow showers over north-central WI through Sunday. The air mass aloft remains only modestly cold with 8H temperatures holding at around -10C, thus little additional accumulation is anticipated. The rest of northeast WI to remain stuck in the clouds as time sections show plenty of low-level moisture remaining in place over the area. Cannot rule out some stray flurries at times, but for the most part Sunday should be mainly dry. Max temperatures to be in the middle to upper 20s north-central, lower 30s east-central WI.
LONG TERM. Sunday Night Through Saturday Issued at 239 PM CST Sat Jan 16 2021
A split flow pattern is forecast to continue through most of next week, with the most energy and moisture to stay to our south, and a few short wave troughs with little moisture passing to our north. Northwest upper flow and falling heights should result in temperatures close to normal through midweek, and then a bit colder than normal by the end of the week.
Lake effect snow showers are likely at times in far northcentral Wisconsin but moisture and instability look insufficient for any significant accumulation. The ECMWF and GFS do have a significant upper trough in the southern stream lifting north towards the Northern Ohio Valley. It could bring several inches of snow if it occurs.
AVIATION. for 06Z TAF Issuance Issued at 1019 PM CST Sat Jan 16 2021
Cyclonic northwest flow and lingering low-level moisture will lead to widespread MVFR ceilings and scattered snow showers and flurries through the TAF period. Lake-effect snow showers will be found in far north central WI, but should generally remain north of the RHI TAF site.
GRB WATCHES/WARNINGS/ADVISORIES. NONE.
SHORT TERM . Kallas LONG TERM . RDM AVIATION . Kieckbusch
Weather Reporting StationsEDIT (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|
|SGNW3 - Sheboygan, WI||24 mi||56 min||NW 6 G 7||32°F|
|KWNW3 - 9087069- Kewaunee, WI||27 mi||56 min||NW 4.1 G 6||31°F||1003.9 hPa (+0.0)|
|GBWW3||36 mi||56 min||NW 5.1 G 6||1003.6 hPa (-0.4)|
Wind History for Kewaunee MET, WI(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Manitowoc, Manitowoc County Airport, WI||4 mi||60 min||NNW 7||10.00 mi||Overcast||31°F||27°F||85%||1005.1 hPa|
|Sheboygan County Memorial Airport, WI||24 mi||63 min||NW 3||10.00 mi||Overcast||32°F||27°F||82%||1004.8 hPa|
Link to 5 minute data for KMTW
Wind History from MTW (wind in knots)
|1 day ago||SE|
|2 days ago||NW||Calm||Calm||N||Calm||Calm||Calm||Calm||E||SE||SE||SE||SE||SE||SE||SE||SE||E||SE||E||SE||E||SE|
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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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
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