Sunday, January19, 2020
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Marine Weather and Tides
South Haven, MI

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 8:08AMSunset 5:41PM Sunday January 19, 2020 8:38 PM EST (01:38 UTC) Moonrise 3:09AMMoonset 1:33PM Illumination 26% Phase: Waning Crescent; Moon at 24 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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LMZ844 St Joseph To South Haven Mi- 405 Pm Est Sun Jan 19 2020
.small craft advisory in effect through late tonight...
Through early evening..North winds 20 to 25 knots. Numerous snow showers. Waves 6 to 9 feet.
Tonight..Northeast winds 10 to 20 knots. Partly cloudy with scattered snow showers. Waves 6 to 8 feet subsiding to 2 to 4 feet toward daybreak.
Martin luther king jr day..East winds around 10 knots veering south, then veering west late in the day. Mostly cloudy with isolated snow showers. Waves 2 to 3 feet.
Monday night..Northwest winds 10 to 15 knots. Cloudy. Waves 1 to 3 feet.
Tuesday..West winds 10 to 15 knots. Mostly Sunny. Waves 2 to 3 feet.
Tuesday night..Southwest winds 15 to 25 knots. Partly cloudy. Waves 2 to 3 feet building to 3 to 5 feet after midnight.
Wednesday..South winds 15 to 25 knots. Partly Sunny. Waves 3 to 5 feet.
Thursday..South winds 10 to 20 knots. Cloudy with a chance of rain and snow. Waves 2 to 3 feet.
Friday..East winds 10 to 15 knots. Rain likely. Waves 1 foot or less.
LMZ844 Expires:202001200900;;207284 FZUS53 KGRR 192105 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 PM EST Sun Jan 19 2020 For waters within five nautical miles of shore on Lake Michigan LMZ844-200900-


7 Day Forecast for Marine Location Near South Haven city, MI
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location: 42.4, -86.27     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 192336 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 636 PM EST Sun Jan 19 2020

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 330 PM EST Sun Jan 19 2020

- Cold Tonight into Monday

- Dry weather into Wednesday

- Precipitation chances increase Wednesday night into next weekend

DISCUSSION. (This evening through next Sunday) Issued at 330 PM EST Sun Jan 19 2020

-- Cold Tonight into Monday --

High pressure beginning to build into the area and a fresh snowpack should provide ideal conditions for radiational cooling. The issues with this though are the fact that some wind hangs in aloft for most of the night. Also, some cirrus from an upstream shortwave will advect in. Not to mention the threat of some lake effect clouds moving back into the western CWA overnight. We have lows ranging from the single digits inland to the teens towards Lake Michigan. Tuesday's highs will hold in the 20s. Normal highs are around 30 and normal lows are in the upper teens. So, colder than normal the next 24 hours.

-- Dry weather into Wednesday --

High pressure will slowly work through the Great Lakes region tonight through Wednesday. This will insure dry weather through the period with a moderation in temperatures mid week as we develop southwest flow behind the retreating high on Wednesday. By Wednesday we should be back up around normal. Fairly quiet weather from now through Wednesday which will be a nice break from the recent active weather.

-- Precipitation chances increase Wednesday night into next weekend --

Precipitation chances increase across the area Wednesday night into Thursday as a weak front presses into the region from the west. The front looks moisture starved and not very strong. We have no higher than chances pops (30-50 pct) for Wednesday night and Thursday for some rain and snow. Precipitation looks light to us and should cause no issues.

Towards the end of the week and into the weekend a low will meander across the Ohio Valley and may spread some precipitation into our area Friday and Saturday. Again the precipitation looks light for the most part and mixed rain and snow again.

AVIATION. (For the 00Z TAFS through 00Z Monday evening) Issued at 635 PM EST Sun Jan 19 2020

VFR conditions will prevail through Monday morning. Some thin stratus with bases under 3000 feet could move into western Lower Michigan during the afternoon. Light north winds tonight will go northwest on Monday.

MARINE. Issued at 330 PM EST Sun Jan 19 2020

Have held onto the Lakeshore Flood Advisory as winds towards 30 knots are still being produced. These winds continue to produce large rolling waves as seen on webcams like the one at South Haven. No doubt erosion is still ongoing, so we felt we would let the headline play out through 700pm this evening.

A Small Craft Advisory remains in effect into the overnight hours to allow these waves to dampen out and subside. The next wave event develops Tuesday night into Wednesday in southwest flow behind the departing High. Waves towards 8 feet up near the points on Wednesday.

HYDROLOGY. Issued at 330 PM EST Sun Jan 19 2020

No new news on the ice jam at Rogers Heights just upstream of the Rogers Dam on the Muskegon River Per Emergency Management. we believe the ice jam is still in place, things are stable and no flooding is occurring at this point. We have kept the Flood Advisory out for that stretch of river into Tuesday as flooding may develop. Ice formation is ongoing in rivers across the area per webcams and photos from staff. Would not be surprised to see a few more ice jams crop up in the next 24 to 48 hours. We will dip into the single digits and teens which will make ice formation efficient tonight.

Otherwise, rivers remain high but continue to fall in most areas. The exception continues to be the lower end of the Grand River near Robinson TWP where backwater from Lake Michigan and the crest working down the grand from last week are producing high flows.

GRR WATCHES/WARNINGS/ADVISORIES. MI . None. LM . Small Craft Advisory until 5 AM EST Monday for LMZ844>849.



SYNOPSIS . Duke DISCUSSION . Duke AVIATION . Ostuno HYDROLOGY . Duke MARINE . Duke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 1 mi39 min NNE 6 G 8 26°F
SJOM4 - St. Joseph, MI 24 mi39 min ENE 4.1 G 13 29°F 1028.8 hPa (+3.4)
HLNM4 - 9087031 - Holland, MI 26 mi57 min N 9.9 G 12 27°F 33°F1027.6 hPa18°F
MKGM4 - Muskegon, MI 57 mi29 min NNE 7 G 8.9 23°F 1031.3 hPa14°F

Wind History for Holland, MI
(wind in knots)    EDIT      (on/off)   Help
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Last
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W32
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W18
G25
W20
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G24
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G24
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N16
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1 day
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E13
G19
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SE12
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SW24
G29
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G31
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G31
W27
W24
G30
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E6
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G11
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G19
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G19

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Haven, South Haven Area Regional Airport, MI3 mi44 minN 010.00 miFair14°F11°F90%1028.4 hPa
Southwest Michigan Regional Airport, MI20 mi46 minENE 410.00 miA Few Clouds23°F14°F68%1029.6 hPa

Link to 5 minute data for KBEH

Wind History from BEH (wind in knots)
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Last 24hrW28
G37
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W19W17W12W18W14W17
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W13W18W14
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63E4
1 day agoSE15
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SE13SE14
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S9S9SW10
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G27
W23
G32
W23
G33
W22
G32
W25
G34
W21
G30
W28
G44
--W25
G38
2 days agoNE63E3CalmE4SE4E4SE4SE7E5E6E7E5SE11SE14SE13SE8SE13
G18
SE11
G19
SE11
G20
SE10SE10
G18
SE15
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G20

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 Grand Rapids, MI (20,4,5,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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weather_mapweather_map weather_map

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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.