Monday, March18, 2019 L-36.com


Marine Weather and Tides
Chatham, MI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:54AMSunset 8:00PM Monday March 18, 2019 10:01 PM EDT (02:01 UTC) Moonrise 3:59PMMoonset 5:53AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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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LSZ249 Expires:201809282245;;939967 fzus73 kmqt 282156 mwsmqt marine weather statement national weather service marquette mi 556 pm edt Fri sep 28 2018 lsz248>250-265-266-282245- 556 pm edt Fri sep 28 2018 a marine weather statement has been issued for the following areas... Huron islands to marquette mi... 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 west of line from manitou island to marquette mi beyond 5nm from shore... Marquette to munising mi... Munising to grand marais mi... At 555 pm edt, doppler radar indicated showers, capable of producing small graupel. These showers were located along a line extending from 10 nm south of stannard rock to 7 nm northeast of presque isle, moving east at 20 knots. Lat...lon 4646 8652 4647 8664 4641 8665 4645 8666 4644 8670 4648 8675 4648 8679 4643 8682 4644 8688 4649 8695 4651 8717 4649 8720 4649 8731 4653 8746 4701 8772 4713 8635 4655 8636
LSZ249


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


Area Discussion for - Marquette, MI
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Fxus63 kmqt 182226
afdmqt
area forecast discussion
national weather service marquette mi
626 pm edt Mon mar 18 2019

Short term (this evening through Tuesday)
issued at 349 pm edt Mon mar 18 2019
a few snow showers into early this evening, then quiet and warmer on
Tuesday. Upper level trough persists but main shortwave is sliding
by north and northeast of lake superior. Sfc trough associated with
the shortwave, ehanced by lake breeze off lake superior, helped to
develop a band of snow over eastern lake superior this morning.

Decent radar echoes with this snow band, but webcams from alger
county showed little vsby reduction as it moved onshore. Band of
snow has now settled toward lake michigan shore while CU field and
maybe some flurries have expanded over rest of upper michigan.

Expect the CU and light snow showers flurries to diminish by early
evening with loss of insolation.

Thick mid clouds will spread over upper great lakes late evening
through overnight ahead of sfc trough moving in from the northern
plains. Clouds should temper strong cooling, so went with temps
mainly in the mid teens to mid 20s, coolest inland. On Tuesday, sw
winds continue to increase ahead of the approaching trough. Mid
clouds should gradually clear out from west to east. Temperatures
may show quite a gradient on Tuesday based on clouds and also where
winds are coming off lk michigan. Mixing up to h85 with sunshine
could support highs into the mid, maybe upper 40s over the west.

Meanwhile, flow off chilly lake michigan (where some ice cover is
still present) along with clouds hanging around longer in the day
may keep MAX temps only in the mid 30s from manistique to newberry.

Long term (Tuesday night through Monday)
issued at 437 pm edt Mon mar 18 2019
models suggest that a mid uppper level ridge will persist through
western canada resulting in downstream NW flow through the great
lakes. Expect gradually warming as the ridge slowly builds eastward
toward the end of the week.

Tuesday night into Wednesday, a clipper shortwave trough will bring
pcpn through upper michigan supported by moderate 700-300 qvector
conv and upper level div with the left exit of the 250-300 mb jet.

Most of the pcpn, between 06z-18z, is expected to fall as snow
before enough daytime warming pushes temps into upper 30s during the
afternoon. Any snowfall amounts should remain less than an inch.

Thursday, the next clipper shrtwv is expected to brush mainly
eastern portions of upper michigan with light rain or snow showers
in the afternoon into the evening. Pcpn amounts should be less
than any amounts on Wednesday.

Friday-Sunday, dry weather will prevail as a sfc ridge dominates the
region. Milder air will move in with highs climbing from the upper
30s to mid 40s Friday to the mid 40s to lower 50s Saturday and the
upper 40s to mid 50s Saturday.

Monday, model differences persist as the favored ECMWF and gfs-fv3
with a stronger slower trough over eastern canada keep dry weather
over the northern great lakes with a sfc ridge building south from
northern ontario. Lower end pops reflect the uncertainty as less
ampflifed gfs GEFS allows a mid level trough and associated pcpn
to move into the area.

Aviation (for the 00z tafs through 00z Tuesday evening)
issued at 626 pm edt Mon mar 18 2019
vfr conditions will continue through the forecast period at all
sites with some mid level clouds passing through.

Marine (for the 4 pm lake superior forecast issuance)
issued at 349 pm edt Mon mar 18 2019
overall, expect winds 25 knots or less through the week.

Mqt watches warnings advisories
Upper michigan...

none.

Lake superior...

none.

Lake michigan...

none.

Short term... Jla
long term... Jlb
aviation... 07
marine... Jla


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KP53 10 mi65 min Calm 28°F 1025.9 hPa24°F
MCGM4 - 9099018 - Marquette C.G., MI 30 mi43 min SSW 1 G 2.9 29°F 1023.8 hPa22°F
GRIM4 36 mi21 min SE 7 G 8 31°F 1024.7 hPa29°F
GR4 - Grand Marais, MI 49 mi81 min Calm G 0 29°F 1025.7 hPa
BIGM4 - Big Bay, MI 54 mi81 min S 1.9 G 4.1 31°F 1023 hPa

Wind History for Marquette C.G., MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Munising - Munising Lakeshore Observation, MI10 mi65 minN 0 mi28°F24°F85%1025.9 hPa

Wind History from P53 (wind in knots)
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Last 24hrNW4CalmS3S6S6S7S6S8S5SW8SW8SW7SW8SW44N10N11CalmN5NE8NE5CalmCalmCalm
1 day agoS6S7S7S7S6S7S8S10S7SW3S7S6CalmCalmCalmNE4NE6N7NE6NE9NE7N7N6NW3
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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wmap_A
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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Marquette, MI (22,6,7,8)
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Ground Weather Radar Station Marquette, MI
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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.