Monday, December16, 2019
Privacy Policy
L-36.com


Marine Weather and Tides
Chatham, 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 8:25AMSunset 5:04PM Monday December 16, 2019 7:58 AM EST (12:58 UTC) Moonrise 10:00PMMoonset 12:06PM Illumination 77% 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
    EDIT      (on/off)   Help
LSZ249 133 pm edt Mon sep 30 2019 a marine weather statement has been issued for the following areas... Grand marais to whitefish point mi... Green bay north of line from cedar river mi to rock island passage... Lake superior east of a line from manitou island to marquette mi and west of a line from grand marais mi to the us/canadian border beyond 5nm from shore... Lake superior from grand marais mi to whitefish point mi 5nm off shore to the us/canadian border... Marquette to munising mi... Munising to grand marais mi... At 133 pm edt, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots and small hail. These Thunderstorms were located along a line extending from 33 nm northwest of minneapolis shoal to 24 nm northwest of grand sable dunes, moving east at 35 knots. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. This strong Thunderstorms will likely produce winds to around 30 knots, and could pose a serious hazard for boaters. A special marine warning may eventually be required when these storms reach the nearshore waters. Boaters should consider heading for shore before these storms arrive. && lat...lon 4694 8523 4663 8559 4663 8615 4653 8642 4637 8665 4643 8677 4639 8690 4596 8695 4592 8688 4577 8691 4581 8712 4595 8696 4640 8690 4649 8702 4703 8642
LSZ249 Expires:201909301830;;005276 FZUS73 KMQT 301733 MWSMQT Marine Weather Statement National Weather Service Marquette MI 133 PM EDT Mon Sep 30 2019 LMZ221-LSZ249>251-266-267-301830-


7 Day Forecast for Marine Location Near Chatham, MI
   Hourly   EDIT   Help
location: 46.43, -86.84     debug


Area Discussion for - Marquette, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KMQT 161138 AFDMQT

Area Forecast Discussion National Weather Service Marquette MI 638 AM EST Mon Dec 16 2019

SHORT TERM. (Today and tonight) Issued at 235 AM EST MON DEC 16 2019

Bottom line up front: snow showers are expected for the Keweenaw Peninsula today through tonight, portions of the east this evening, and the west tonight. Temps will remain below normal for mid-December.

Flurries and light snow ongoing across a good chunk of the U.P. early this morning will taper off with little to no accumulation expected. Snow chances will persist though in the Keweenaw Peninsula through this forecast period as it sits on the periphery of a surface high centered near the MN/WI border, aided by a subtle disturbance dropping down across Lake Superior. As an upper trough axis approaches the Upper Great Lakes this evening, vort max will intensify a bit, with snow showers popping up in the east as well, primarily for locations close to the Lake Superior shoreline in eastern Alger into Luce County. Although these eastern showers look to be fairly short-lived, a quick inch or two could easily be accumulated this evening. As the night continues, the attention shifts back to the west as this aforementioned trough kicks off some cyclogenesis over northern Lake Superior. Expect the lake to assist in providing some lower-level moisture, along with aiding in the trajectory of said snow showers, as 850mb to 700mb winds remain nearly westerly today into tonight. Surface winds will be a bit more erratic, rocking back and forth between the WNW to SW, before becoming northwesterly across the west half of the lake by sunrise tomorrow. Accumulations today into tonight will generally range from 2" to nearly 4" in the Keweenaw, with those higher amounts likely confined to the higher terrain locations along the spine.

As alluded to, highs today will remain on the chilly side, topping out in the teens and 20s. This will translate into tonight as well, although a non-diurnal temp curve for at least the west half is anticipated to play out. Temperatures in the west are looking to bottom out relatively quickly initially, moderating as additional cloud cover traverses into the area. In the east, have followed a bit more of a traditionally seen diurnal curve as the clouds briefly part after the snow showers this evening taper off. Single digits on either side of the zero degree mark is expected, with teens along the lakeshores and the Keweenaw.

LONG TERM. (Tuesday through Sunday) Issued at 325 AM EST MON DEC 16 2019

A polar cold front will be right on our doorstep Tuesday morning, pushing into western Upper Michigan with the beginnings of snow shower activity that will transition to LES, strengthen through the evening and overnight, then diminish from west to east Wednesday into Wednesday night as flow aloft becomes anticyclonic and a sfc high quickly pushes through the region. Winds turn to southerly behind this high and after a cold Wednesday temperatures will gradually warm through the weekend with highs back into the low to mid 30s by Sunday thanks to large scale ridging building over the CONUS. The latter half of next week will also feature a few shortwaves interrupting the ridge and bringing intermittent light precip to the region as well as the potential for a weak split flow low pressure system to traverse the region Friday into Saturday. After it exits it will leave Upper Michigan on the western periphery of an ECONUS trough to end the weekend but it will quickly be replaced by large scale ridging into early next week after perhaps one last clipper shortwave Sunday night.

Tuesday morning, snow will mainly be relegated to the northwestern UP but colder air and modest northwesterly winds will overspread the region behind the cold front. Snow will pick up over the east half through the afternoon and evening and LES will really get going in earnest overnight. Inversion heights will build to near 7kft over the east and 6kft over the west before subsidence moves in from west to east during the daytime Wednesday and begins to cut off snow. SLRs likely maximize 18Z Tue-00Z Wed and could end up similar to last night with areas seeing values north of 50:1 for a time. However, after this 850 mb temps will plummet to -24 to -27C and the column will exit the DGZ leading to smaller, non-dendritic snowflake growth. Thus, late Tuesday night into Wednesday visibility will become a concern. Some blowing and drifting will also be possible at times near Lake Superior.

In total over the 36 hour period Tuesday morning through Wednesday evening, snow accumulations will be in the 2-6" range west with the better chances for the higher end over the spine of the Keweenaw. For Alger, northern Schoolcraft, and northern Luce, it's looking like a 4-7" event with lower totals as you head south towards Lake Michigan. Given the NW wind direction dominating, probably only an inch or two for the more heavily populated Harvey to Ishpeming corridor and of course the south-central will remain mainly dry. Again, heaviest snowfall rates probably come Tuesday evening through the overnight, but travel may be impacted by snow-covered roads and visibility restrictions Wednesday morning, especially from Munising eastward.

Wednesday night the LES ends and winds turn to the south. A quick- moving clipper may bring light snow to the Keweenaw and eastern UP into Thursday morning, then models hint at some additional LES developing off of Lake Michigan before the colder airmass pulls out. This would impact primarily Schoolcraft and Luce Counties through the day. Model spread increases after this as split flow develops over the region. GFS continues to develop a closed low and associated sfc circulation that would bring sustained south/southeasterly flow off the lake and some weak synoptic lift for additional UP-wide snow showers later Friday. The ECMWF, however, never closes off at 500 mb and remains dry Friday and Friday night.

Pretty good agreement, however, in a Saturday clipper shortwave bringing some light snow primarily to the north half and opted to increase POPs to chance from the blends slight chance accordingly. May be another similar clipper shortwave later in the weekend, however this feature is not included in the deterministic GFS solution. Broad ridging will build into the central CONUS for Monday and should lead to a drier day, but at 7 days out this may change so stay tuned .

AVIATION. (For the 12Z TAFS through 12Z Tuesday morning) Issued at 628 AM EST MON DEC 16 2019

KCMX's ceilings have dipped down into the IFR category, but is not anticipated to last much longer, and have reflected the ceilings teetering right on the edge through midday. KSAW's ceilings also dropped a category, into MVFR, with a similar setup anticipated, teetering right on the edge. Generally speaking, MVFR ceilings are anticipated to prevail for much of this TAF period at all three terminals, although some partial clearing could occur at KSAW later in the period. On and off snow showers are expected at KCMX through the period, with snow chances dropping off at KIWD today before re-emerging later tonight. Winds will become westerly today through tonight, with gusts over 20 knots possible at KCMX.

MARINE. (For the 4 AM Lake Superior forecast issuance) Issued at 316 AM EST MON DEC 16 2019

A few near gale-force west to southwesterly wind gusts will persist today into this evening, briefly diminishing early tonight before re-energizing by early tomorrow. Widespread near gale- force northwesterly wind gusts are expected tomorrow into tomorrow night, hanging on in the east until early Wednesday. Surface high pressure moving in Wednesday through early Thursday will allow for sustained winds to remain less than 20 knots, with this trend continuing into the weekend, thanks to ridging taking hold.

Moderate freezing spray will be a concern today into tomorrow, with heavy freezing spray becoming increasingly concerning by tomorrow night. Moderate freezing spray potential continues into Wednesday, subsiding Wednesday night, with sporadic icing potential through week's end.

MQT WATCHES/WARNINGS/ADVISORIES. Upper Michigan . None. Lake Superior . None. Lake Michigan . None.

SHORT TERM . lg LONG TERM . KCW AVIATION . lg MARINE . lg


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KP53 10 mi63 min SSW 7 14°F 1019 hPa7°F
MCGM4 - 9099018 - Marquette C.G., MI 30 mi65 min NW 5.1 G 7 16°F 1016.8 hPa6°F
GRIM4 36 mi69 min WSW 9.9 G 14 20°F 1016.7 hPa14°F
GR4 - Grand Marais, MI 49 mi79 min SSW 8.9 G 12 15°F 1017.6 hPa
BIGM4 - Big Bay, MI 54 mi79 min WSW 2.9 G 5.1 18°F 1014.9 hPa

Wind History for Marquette C.G., MI
(wind in knots)    EDIT      (on/off)   Help
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
4
AM
5
AM
6
AM
7
AM
Last
24hr
W5
G8
NW6
G9
W4
G8
W3
G10
SW5
NW3
SW4
SW4
G11
SW7
W4
SW2
SW3
SW4
G8
SW4
G8
W1
G5
SW4
E1
W2
G5
SW7
G10
SW8
G11
SW7
G10
SW3
G9
SW4
NW3
1 day
ago
W4
NW5
NW6
G10
NW4
G7
N10
G15
N11
G16
N12
G17
N9
G15
NW7
G15
NW10
G17
NW9
G15
NW9
G18
NW11
G19
N11
G22
N15
G22
N12
G21
N14
G22
N11
G18
W6
G10
NW8
G16
NW4
G10
NW6
G12
NW5
G9
NW5
G10
2 days
ago
NE8
G11
NE6
G10
NE9
NE3
G8
NE4
G8
N2
NE2
G5
N1
G4
N4
N6
N4
N3
E4
G8
N1
NW3
NW3
NW4
NW3
NW2
G5
NW4
G7
NW4
NW3
NW4
G8
NW3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Munising - Munising Lakeshore Observation, MI10 mi2 hrsSSW 6 mi14°F6°F71%1018.5 hPa

Link to 5 minute data for KP53

Wind History from P53 (wind in knots)
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
4
AM
5
AM
6
AM
7
AM
Last 24hrN12
G20
NW6
G15
W6NW7
G18
W8
G16
W7NW12
G17
NW53CalmS4S5S4S4SW5S6SW7SW8SW6SW6SW8SW7SW6SW7
1 day agoCalmSW3S3N8N14N12N12N12
G20
N12N15
G22
N13
G21
N16
G25
N16
G25
N20
G28
N17
G30
N16N15N13N17N13N16--N12N12
G22
2 days agoS3E5CalmCalmCalmS3CalmCalmCalmCalmS3S3CalmS3S4S3S3S3S4CalmN4N4N6Calm

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
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 Marquette, MI (7,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Marquette, MI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This webiste uses cookies to save your settings. No personal information is saved. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.