Saturday, June23, 2018 L-36.com


Marine Weather and Tides
Grand Marais, MN

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:54AMSunset 10:04PM Saturday June 23, 2018 5:22 PM EDT (21:22 UTC) Moonrise 4:35PMMoonset 2:37AM Illumination 80% Phase: Waxing Gibbous; Moon at 10 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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LSZ140 1039 Am Cdt Fri Jun 15 2018
.a strong Thunderstorm over western lake superior... The areas affected include... Chequamegon bay-bayfield to oak point wi... Grand marais to taconite harbor mn... Grand portage to grand marais mn... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... Oak point to saxon harbor wi... Port wing to sand island wi... Sand island to bayfield wi... Silver bay harbor to two harbors mn... Taconite harbor to silver bay harbor mn... At 1037 am cdt, marine weather spotters and observations reported strong winds behind a complex of Thunderstorms, producing winds of 30 to 40 knots. These winds will continue through the morning. Locations impacted include... Raspberry island lighthouse, split rock bay, sand island, sugar loaf cove, horseshoe bay and safe harbor, tofte safe harbor, madeline island, twin points safe harbor, beaver bay, mouth of the cross river, bayfield peninsula sea caves, red cliff, and tofte. Precautionary/preparedness actions... Mariners can expect gusty winds to around 33 knots and locally higher waves. Boaters should seek safe harbor immediately and remain there until winds and waves subside. && lat...lon 4656 9051 4678 9090 4691 9081 4693 9086 4687 9103 4715 9145 4748 9103 4764 9072 4801 8954
LSZ140 Expires:201806151645;;580131 FZUS73 KDLH 151539 MWSDLH Marine Weather Statement National Weather Service Duluth MN 1039 AM CDT FRI JUN 15 2018 LSZ121-140>143-146>148-162-151645-

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


Area Discussion for - Duluth, MN
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Fxus63 kdlh 232030
afddlh
area forecast discussion
national weather service duluth mn
330 pm cdt Sat jun 23 2018

Short term (this evening through Sunday)
issued at 330 pm cdt Sat jun 23 2018
at 330 pm, skies were generally partly cloudy across the region.

The exception was across the far northern tier of counties, where
numerous showers and thunderstorms had developed. There were a few
thunderstorms in the brainerd lakes area as well. Elsewhere, it
was dry. Temperatures at 3 pm ranged from the mid 50s at the lake
superior shoreline, to the upper 70s to around 80 elsewhere.

The focus for tonight and Sunday will be the chance of
thunderstorms. The potential will remain for scattered showers and
thunderstorms across the northland. The best chance will continue
to be in northeast minnesota. The best chance overnight will
actually become the arrowhead, where the frontal boundary will be
pushing through tonight. Northeast to east winds will gradually
increase through the night, bringing cooler air off lake superior.

For tonight, will have the highest pop's across the
north northeast, where it is more unstable, with some pops across
the remainder of northeast minnesota and extreme northwest
wisconsin as well. Overnight lows will range from the 40s near
lake superior to the 50s well inland from the lake.

On Sunday, the best chance of showers and thunderstorms will be
across the far south. Drier air will push across the northern
portion of the region, with lowering chances for precipitation.

Highs on Sunday will range from the 40s to lower 50s near lake
superior, to the 70s well inland. Gusty east to northeast winds
will continue, with the strongest winds near lake superior.

Long term (Sunday night through Saturday)
issued at 330 pm cdt Sat jun 23 2018
the next week looks to be much cooler and wetter than this past
week. The first part will be under the influence of the stacked
low. By Monday morning the low will be heading toward ia, then
over southern mn Monday night and Tuesday. Showers will be
widespread across the northland as a series of upper level
shortwaves moves through the upper flow. Can't expect summer-like
temperatures with extensive cloud cover and winds off the cold
waters of lake superior. But by Wednesday the low will have pulled
away to the east over lower michigan. This may not bring a
totally dry day as another northern wave will swing through
northern mn and possibly set off a few showers. The northland will
be under brief high pressure on Thursday, then another upper
level long wave trough will begin the rain process with strong
warm air advection and a 50 knot low level jet Thursday night.

Showers and storms will be possible late Thursday night into
Saturday.

Aviation (for the 18z tafs through 18z Sunday afternoon)
issued at 1236 pm cdt Sat jun 23 2018
thunderstorms will be widely scattered over northern minnesota
this afternoon. The storms will mainly be in the kinl and khib
areas. Ceilings and visibilities should remainVFR. Some storms
may affect kbrd in the south later this afternoon and early this
evening.

Preliminary point temps pops
Dlh 50 57 49 67 20 10 10 10
inl 56 72 50 76 40 10 0 10
brd 58 73 55 74 20 20 20 30
hyr 52 70 54 76 10 20 10 10
asx 48 56 47 67 10 10 10 10

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... Small craft advisory from 10 pm this evening to 9 pm cdt Sunday
for lsz121-142>148.

Short term... Dap
long term... Clc
aviation... Clc


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KGNA 26 mi87 min ENE 6 55°F 1009.4 hPa39°F
GD5 - 9099090 - Grand Marais, MN 26 mi53 min 53°F 1008.7 hPa43°F
ROAM4 - Rock of Ages, MI 30 mi83 min ENE 11 G 12 49°F 1011 hPa (+0.3)
45006 - W SUPERIOR 48NM North of Ironwood, MI 37 mi93 min ENE 5.8 G 9.7 40°F 38°F1009 hPa (-0.3)
DISW3 - Devils Island, WI 71 mi83 min NE 6 G 7 52°F 1009 hPa (+0.0)48°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Grand Marais, The Bay of Grand Marais, MN26 mi87 minENE 6 mi55°F39°F55%1009.4 hPa

Wind History from GNA (wind in knots)
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Last 24hrCalmCalmCalmCalmNE6E5SW5CalmCalmCalmCalmCalmCalmCalmCalmW3W5CalmNE5NE6E3E9NE6Calm
1 day agoE3E5CalmNE3CalmCalmCalmCalmN3CalmCalmCalmCalmCalmCalmSW6SW10SW8SW8W7SW7SW6SW7SW5
2 days agoNE13NE12NE8NE3CalmNE3NE3CalmCalmNE5NE7NE3SW6NE3NE6NE7NE5NE4E6E4NE4NE6NE7E4

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Duluth, MN (17,4,5,8)
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Ground Weather Radar Station Marquette, 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.