Sunday, December15, 2019
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Marine Weather and Tides
Haslett, MI

Version 3.4
NOTICE
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.
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 7:59AMSunset 5:06PM Sunday December 15, 2019 12:51 PM EST (17:51 UTC) Moonrise 8:47PMMoonset 11:04AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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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LCZ423 Expires:201910270922;;342001 Fzus73 Kdtx 270913 Mwsdtx Marine Weather Statement National Weather Service Detroit/pontiac Mi 513 Am Edt Sun Oct 27 2019 Lcz422-423-460-lez444-270922- /o.exp.kdtx.ma.w.0061.000000t0000z-191027t0915z/ 513 Am Edt Sun Oct 27 2019
.the special marine warning will expire at 515 am edt... The affected areas were... Lake st. Clair... Detroit river... Michigan waters of lake erie... The showers have moved out of the area and no longer pose a significant threat to boaters. Lat...lon 4225 8318 4233 8311 4239 8295 4259 8285 4266 8285 4272 8269 4270 8261 4264 8256 4265 8255 4266 8255 4261 8252 4255 8259 4254 8266 4238 8282 4232 8306 4224 8313 4203 8315 4196 8311 4199 8314 4195 8329 time...mot...loc 0912z 210deg 39kt 4330 8288 4297 8249
LCZ423


7 Day Forecast for Marine Location Near Haslett, MI
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location: 42.74, -84.4     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 151718 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 1218 PM EST Sun Dec 15 2019

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 313 AM EST Sun Dec 15 2019

- Snow Showers Ending This Morning

- System Passes By to the South Monday into Monday Night

- Lake Effect Snow Showers and Colder Tuesday into Wednesday

- Dryer Through the Rest of the Week

UPDATE. Issued at 948 AM EST Sun Dec 15 2019

The POPs for snow showers were increased this morning. Radar and observational trends indicate the snow has increased over the past hour. High Res guidance supports a decreasing trend to the snow showers for the rest of the day. Bufkit overviews show the moisture depth decreasing this afternoon which would support a decreasing trend to the snow showers. Locally some areas could see perhaps up to an inch of snow for this morning.

DISCUSSION. (Today through next Saturday) Issued at 313 AM EST Sun Dec 15 2019

Precipitation has transitioned over to snow this morning with light accumulations already being seen on top of an icy glaze from last night's freezing drizzle. Only light snow accumulations of one inch or less are expected before snow ends by the late morning. Highest accumulations will be along and west of US-131 and north of I-96. Slick roads can be expected due light snow in addition to any residual glazing of ice from freezing drizzle last night.

For the system Monday into Monday night, model trends continue to suggest a more southerly track, yielding most of the higher snow totals well to our south and east. That being said, it is still within the realm of possibility that areas and south of I-94 may see light snow accumulation of less than an inch by Tuesday morning, particularly near the Jackson area.

By Tuesday, the flow turns northwesterly as an upper level trough digs into the Great Lakes. Favorable conditions will support lake effect snow showers Tuesday into Wednesday as 850mb temperatures drop into the negative teens and low level moisture increases. Light snowfall accumulations will be possible, leading to some travel impacts for lakeshore counties Tuesday into Wednesday morning.

Lake effect snow diminishes Wednesday afternoon, then conditions turn quiet to end the week. We will see a break in precipitation into next weekend, with more mild temperatures in the mid 30s.

AVIATION. (For the 18Z TAFS through 18Z Monday afternoon) Issued at 1213 PM EST Sun Dec 15 2019

The snow showers will continue to wind down slowly this afternoon. Based on the trends . any impacts from these snow showers should be brief. The remaining MVFR cloud cover should slowly lift into VFR category Then for tonight into Monday AM. dry conditions are expected with several VFR cloud levels around.


MARINE. Issued at 313 AM EST Sun Dec 15 2019

Hazardous small craft conditions continue this morning. High pressure will move in later today leading to improved conditions with weaker winds and lower waves. Quiet conditions will continue until Tuesday as winds turn northwesterly and build waves towards 5 to 8 feet through Wednesday.

GRR WATCHES/WARNINGS/ADVISORIES. MI . None. LM . None.

UPDATE . MJS SYNOPSIS . Honor DISCUSSION . Honor AVIATION . MJS MARINE . Honor


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SBLM4 - Saginaw Bay Light #1, MI 82 mi51 min NW 9.9 G 11 27°F 1015.9 hPa (+2.4)
CLSM4 - St. Clair Shores, MI 83 mi51 min W 8 G 13 31°F 1017.6 hPa (+2.4)
THRO1 - 9063085 - Toledo, OH 87 mi51 min W 12 G 18

Wind History for Toledo, OH
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Capital Region International Airport, MI11 mi58 minW 13 G 177.00 miLight Snow27°F19°F75%1019.3 hPa
Mason, Mason Jewett Field Airport, MI12 mi56 minW 810.00 miLight Snow28°F20°F75%1017.6 hPa
Owosso, Owosso Community Airport, MI22 mi56 minWNW 10 G 144.00 miLight Snow32°F24°F75%1017.3 hPa
Howell, Livingston County Airport, MI24 mi56 minW 83.00 miLight Snow30°F22°F75%1017.3 hPa

Link to 5 minute data for KLAN

Wind History from LAN (wind in knots)
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Last 24hrW6W9W5W5W6W9W13W10W11W12
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1 day agoS7S7S6S5S5S3SE5S5S4S5S3CalmCalmCalmCalmCalmNW3CalmCalmNW5NW3NW4NW6NW8
2 days agoS13S14S13
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S9S11S11S10S10S9S9S8S8S8S7S6S8S8S8

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    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 (12,3,4,5)
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Ground Weather Radar Station Detroit, 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 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.