Saturday, May25, 2019 L-36.com


Marine Weather and Tides
Grand Marais, MN

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 6:03AMSunset 9:44PM Saturday May 25, 2019 11:25 PM EDT (03:25 UTC) Moonrise 1:40AMMoonset 11:16AM Illumination 54% Phase: Third Quarter Moon; Moon at 22 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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LSZ162 Lake Superior West Of A Line From Saxon Harbor Wi To Grand Portage Mn Beyond 5nm- 345 Pm Edt Sat May 25 2019 /245 Pm Cdt Sat May 25 2019/
Late this afternoon..West winds 10 to 20 knots. A slight chance of showers. Waves 2 to 4 feet.
Tonight..West winds 5 to 15 knots. A slight chance of rain showers through midnight. Waves subsiding to calm to 2 feet.
Sunday..Southwest winds 5 to 15 knots becoming east 10 to 20 knots late. Waves building to 1 to 3 feet.
Sunday night..Northeast winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A slight chance of rain showers. Waves 1 to 3 feet.
Monday..Northeast winds 10 to 20 knots. A slight chance of rain showers. Waves building to 2 to 4 feet.
Monday night..Northeast winds 5 to 15 knots. Waves subsiding to calm to 2 feet.
Tuesday..Northeast winds 5 to 15 knots. A chance of rain showers. Waves calm to 2 feet.
Tuesday night..Northeast winds less than 10 knots backing west after midnight. Waves calm to 2 feet.
Wednesday..Southwest winds 5 to 15 knots veering west. Waves calm to 2 feet.
Thursday..Northwest winds 5 to 15 knots veering north. Waves calm to 2 feet.
LSZ162 Expires:201905260345;;449770 FZUS63 KMQT 251945 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 345 PM EDT Sat May 25 2019 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A 29.5 inch low will lift across northern Ontario tonight, passing just north of Lake Superior. High pressure of 30.1 inches will shift in for Sunday. The high will build to 30.2 inches as a 29.3 inch low organizes in the Central Plains and begins its approach late Monday night. This low is expected to slowly lift northeast into the Upper Great Lakes in the middle to later part of next week at 29.4 inches. LSZ162-260345-


7 Day Forecast for Marine Location Near Grand Marais city, MN
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location: 47.86, -89.87     debug


Area Discussion for - Duluth, MN
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Fxus63 kdlh 260231
afddlh
area forecast discussion
national weather service duluth mn
931 pm cdt Sat may 25 2019

Short term (this evening through Sunday)
issued at 312 pm cdt Sat may 25 2019
weak cool air advection and cyclonic vorticity advection provided
sufficient instability and lift for widespread cumulus and a few
showers this afternoon. Have isolated showers in the forecast
through 7 pm over much of the northland. The showers and clouds
should begin to dissipate an hour or two before sunset, but think
a few may linger until nearly 10 pm. High pressure drifts eastward
through the region tonight and Sunday while a weak cool front is
forecast to sag southward into the northland Sunday afternoon.

Lows tonight will be in the upper 30s and low 40s. Mainly cloudy
skies are expected Sunday near the front. A few rain showers may
develop and affect the international border area during the day.

Highs will reach the middle 60s north and the middle 70s south.

The front will stall over northern minnesota and lake superior
Sunday night. Convergence along the front will receive a boost
from increased southeasterly flow around the northeast periphery
of an approaching area of low pressure late Sunday night. The
chance of showers will spread farther south and affect most of the
northland by early Monday morning.

Long term (Sunday night through Saturday)
issued at 312 pm cdt Sat may 25 2019
the main weather maker in the extended period will be a system
sliding through southern wisconsin on Monday night. This system is
modeled fairly well, but there are discrepancies in the amount of
water contained in the system with the NAM being moist with pw's
in excess of 1.25" while the GFS is struggling to eclipse 1.0".

Best dynamics are to our south, but some wrap around precip on the
northern tier may clip our NW wi counties. The SREF probabilities
of precip are bringing the potential for moderate rainfall all
the way up to lake superior. Most models have some signal of
precip over NW wi, so upped the pops there over model consensus by
about 25%. Similarly increased the QPF given the relatively high
moisture content of the atmosphere.

The GFS and euro largely kick this system out of the area by
Tuesday; however, the NAM and canadian and even the SREF ensembles
indicate some lingering potential for precip, so again upped the
pops particularly since the NAM has been one of the better models
as of lately with this cold spring pattern.

Another system crosses Wednesday, but will likely be a similar
track and intensity to Monday evening's system. High pressure
builds afterwards as an upper level trough slides near southern
ontario for the start of june with cooler weather expected.

Aviation (for the 00z tafs through 00z Sunday evening)
issued at 639 pm cdt Sat may 25 2019
a broken deck of cumulus clouds around 6k ft covered the terminals
at the start of this forecast. TheseVFR clouds will dissipate
around 02z leaving a mainly clear sky. Some showers will be in the
vicinity of hib until 02z, then subside. Some patchy br is
possible near brd around 11z, but should quickly erode by 13z. A
cold front north of the international border will drift toward
inl after 14z and bring some MVFR clouds to the terminal, with
improvement back toVFR by 21z.

Marine
Issued at 931 pm cdt Sat may 25 2019
high pressure builds over the waters with mostly quiet
conditions. A few stronger systems will move through southern
wisconsin through the upcoming week, but should only slightly
increase the winds across the waters.

Preliminary point temps pops
Dlh 42 71 41 50 20 10 20 40
inl 42 62 41 60 10 30 30 10
brd 42 73 46 60 10 10 30 40
hyr 42 75 46 60 20 0 20 70
asx 43 71 42 53 20 0 10 50

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Short term... Huyck
long term... Wolfe
aviation... Gsf
marine... Gsf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KGNA 26 mi90 min WNW 5.1 58°F 1012.6 hPa47°F
GD5 - 9099090 - Grand Marais, MN 26 mi44 min 54°F 42°F1013.1 hPa50°F
45006 - W SUPERIOR 48NM North of Ironwood, MI 37 mi36 min WNW 9.7 G 9.7 44°F 37°F1 ft1013.3 hPa (+2.4)

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Grand Marais/Cook County Airport, MN27 mi31 minW 310.00 miFair48°F42°F82%1013.5 hPa

Wind History from CKC (wind in knots)
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Last 24hrSE3CalmSE3CalmCalmS4S4S5SW5SW5SW6W8
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1 day agoN6N5N6N5N6NE6E5E8E8E9E10
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2 days agoE4CalmE3CalmCalmCalmCalmCalmCalmCalmNW5NW6NW7NW6
G14
NW4NW8NW12
G21
N15
G21
NW11
G18
N9N7N5N4N7

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 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Duluth, MN (23,6,7,8)
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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.