Tuesday, November13, 2018 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 8:01AMSunset 5:21PM Tuesday November 13, 2018 9:41 PM EST (02:41 UTC) Moonrise 1:19PMMoonset 10:27PM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 351 Pm Est Tue Nov 13 2018 /251 Pm Cst Tue Nov 13 2018/
.gale watch in effect from Wednesday evening through Thursday morning...
Late this afternoon..West winds 15 to 25 knots. Isolated snow showers. Waves 2 to 4 feet.
Tonight..West winds 15 to 25 knots diminishing to 5 to 15 knots. Isolated snow showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet.
Wednesday..Southwest winds 5 to 15 knots becoming south 10 to 20 knots by late morning, then diminishing to 5 to 15 knots by mid afternoon. Isolated snow showers in the morning. Waves building to 1 to 3 feet.
Wednesday night..South winds 15 to 25 knots becoming southwest 20 to 30 knots by midnight. Waves building to 6 to 9 feet occasionally to 11 feet.
Thursday..Southwest winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon. A slight chance of rain showers in the afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
Thursday night..West winds 10 to 20 knots veering northwest after midnight. A chance of rain showers. Waves subsiding to 1 to 3 feet.
Friday..Northwest winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon. Waves 1 to 3 feet.
Friday night..North winds 10 to 20 knots. A chance of rain showers in the evening. A chance of snow showers. Waves 1 to 3 feet.
Saturday..Northwest winds 10 to 20 knots backing west. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet.
Sunday..West winds 15 to 25 knots veering northwest. A chance of snow showers. Waves subsiding to calm to 2 feet.
LSZ162 Expires:201811140500;;257981 FZUS63 KMQT 132051 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 351 PM EST Tue Nov 13 2018 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 30.5 inch high pressure ridge over the central Plains and upper Mississippi Valley will shift east, crossing Lake Superior late tonight through early Wednesday afternoon. As the ridge moves east to New England on Thursday morning, a 29.8 inch low pressure will track from Alberta to northern Ontario. This low will then reach Quebec by late Friday night. In its wake, 30.6 inch high pressure will build into the Northern Plains Friday night. This high will settle over the central Plains on Sunday morning as a 30.1 inch low pressure trough drops southeast over northern Ontario. LSZ162-140500-


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 132326
afddlh
area forecast discussion
national weather service duluth mn
526 pm cst Tue nov 13 2018

Short term (this evening through Wednesday)
issued at 250 pm cst Tue nov 13 2018
high pressure axis in place over the area though still cold enough
to generate a lot of low level clouds. Some of these clouds are
precipitating mainly off of the lakes.

Warm air advects in for Wednesday where temperatures will climb
above freezing in most locations. Clouds will likely still be
scattered to broken across the forecast area with better chances
for clearing in the south.

Long term (Wednesday night through Tuesday)
issued at 250 pm cst Tue nov 13 2018
moisture begins to advect into the region on Thursday as a broad
area of low pressure nears. An upper level vort MAX will provide
lift for some light precipitation across the area. The main
concern here is whether it will fall as snow or freezing rain.

Soundings indicate more snow towards inl while freezing rain is
more likely in NW wi. This forecast tended to go a little cooler
with more snow than fzra expected. While initially more of a
freezing rain sounding - the lower atmosphere is only shallowly
saturated with a dry layer above followed by a saturated cold
layer above that. This should lend more to the seeder feeder
mechanism inoculating the lower clouds with ice crystals. This
feature is most prominent at inl, but is less so at dlh. Despite
the precip type, the QPF amounts are minimal <0.10", so do not
expect this to cause too many issues.

The same system will turn winds to the NW which should cause lake
effect snow over NW wi again. This bout should be shorter in
nature than the last with a few inches of accumulation.

After this system passes, high pressure builds through Monday
though some fairly cold air skirts the region to the northeast.

Another clipper type system or two slides through on NW flow
tue-wed.

Aviation (for the 00z tafs through 00z Wednesday evening)
issued at 526 pm cst Tue nov 13 2018
even though high pressure will be nearby, a mix of MVFR andVFR
cigs were occurring across the terminals. These clouds should last
through mid day Wednesday.

Preliminary point temps pops
Dlh 12 33 26 38 0 0 0 10
inl 9 35 26 35 0 0 10 60
brd 14 39 26 40 0 0 0 10
hyr 11 35 24 39 0 0 0 0
asx 12 35 25 40 10 0 0 10

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... Small craft advisory until 10 pm cst this evening for lsz146-147.

Short term... Wolfe
long term... Wolfe
aviation... Gsf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KGNA 26 mi45 min WSW 4.1 17°F 1030.1 hPa5°F
GD5 - 9099090 - Grand Marais, MN 26 mi47 min 17°F 50°F1027.8 hPa6°F
ROAM4 - Rock of Ages, MI 30 mi41 min NW 17 G 20 18°F 1030 hPa (+0.8)
DISW3 - Devils Island, WI 71 mi41 min W 13 G 17 19°F 1030 hPa (+0.5)7°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Grand Marais/Cook County Airport, MN27 mi46 minWNW 510.00 miOvercast9°F0°F66%1024.4 hPa

Wind History from CKC (wind in knots)
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Last 24hrNW6NW6NW4CalmCalmCalmCalmW3SW5W4CalmW3W5W4SW6W7
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1 day agoW5W6W3W4W4W4NW3CalmW3CalmSW3NW7W5W5W10
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2 days agoCalmS4S4S4S4S3S3CalmW3CalmCalmCalmCalmNW4CalmCalmCalmW3NW4W3NW3NW4NW5W6

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 (21,6,7,8)
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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.