Tuesday, January23, 2018 L-36.com


Marine Weather and Tides
Superior, WI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:39AMSunset 5:01PM Tuesday January 23, 2018 1:45 AM CST (07:45 UTC) Moonrise 11:00AMMoonset 11:58PM Illumination 40% 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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This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 816 Pm Cdt Sun Sep 24 2017
.strong Thunderstorms over western lake superior... The areas affected include... Duluth mn to port wing wi... Grand marais to taconite harbor mn... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... 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... Two harbors to duluth mn... At 816 pm cdt...doppler radar indicated strong Thunderstorms...capable of producing winds to around 30 knots...small hail...and frequent cloud to water lightning. These strong Thunderstorms were located along a line extending from 16 nm northwest of larsmont...to 8 nm southeast of superior harbor...moving northeast at 50 knots. Locations impacted include... Raspberry island...split rock bay...raspberry island lighthouse... Castle danger...sand island...sugar loaf cove...tofte safe harbor... Twin points safe harbor...tofte...mouth of the little marais river... Beaver bay...mouth of the cross river...port wing safe harbor...brule point...herbster...apostle islands sea caves...larsmont...split rock lighthouse...red cliff...and french river. Precautionary/preparedness actions... Mariners can expect gusty winds to around 33 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4689 9196 4715 9149 4754 9094 4762 9080 4687 9066 4682 9086 4688 9080 4693 9086 4691 9096 4684 9110 4682 9118 4683 9121 4674 9150 4666 9192
This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 Expires:201709250215;;885660 FZUS73 KDLH 250116 MWSDLH MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 816 PM CDT SUN SEP 24 2017 LSZ141>147-162-250215-

7 Day Forecast for Marine Location Near Superior, WI
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location: 46.71, -92.01     debug


Area Discussion for - Duluth, MN
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Fxus63 kdlh 230553
afddlh
area forecast discussion
national weather service duluth mn
1153 pm cst Mon jan 22 2018

Update
Issued at 1152 pm cst Mon jan 22 2018
updated to end the advisories and warning for northwest wisconsin.

Low pressure will continue to move off to the east overnight,
resulting in a rapid decrease in snow. Little additional
accumulation is expected. Roads will remain slick across the area
overnight due to the snow that has fallen.

Update issued at 821 pm cst Mon jan 22 2018
heavy snow continued through the evening commute, but radar trends
over the last hour indicate the precipitation was definitely
diminishing across northwest wisconsin. As expected, snowfall
amounts across the advisory warning area were highly variable.

In general, we should see an inch or less in the western areas,
and another 1 to 3 at most in the east. The 23z hrrr seemed to
have a good handle on the current trends. Will likely continue the
headlines through the current advisory warning end time.

Short term (this evening through Tuesday)
issued at 332 pm cst Mon jan 22 2018
the forecast remains on track regarding the winter storm moving
through the northland this afternoon and tonight. As of 3 pm this
afternoon, surface low pressure was centered over southern iowa
with a closed 500 mb circulation over northern missouri. This
storm system will move eastward across southern wisconsin and into
southern lower michigan by late tonight. A broad band of snow
stretched from eastern nebraska and northeast kansas north into
southwest minnesota and then east across the twin cities metro and
into central and northwest wisconsin. Snow rates of 1 to 2 inches
per hour have been reported over portions of southern and east-
central minnesota this afternoon. A strong frontogenetically
forced band of snow stretched from the twin cities to near
phillips, wi and was rotating northward. A period of heavy snow is
expected as this band lifts northwestward across sawyer and price
counties and southern portions of washburn, bayfield, ashland and
iron counties. The frontogenetic snow band is expected to pivot
and then pull east-northeastward with two periods of heavy snow
possible. Periods of near-whiteout conditions are possible,
especially on ridgetops and hill crests. Widespread visibility of
one-half to one-quarter mile are expected where conditions are
less windy. Additional accumulation over the afore mentioned areas
of 2 to 6 inches are expected through 6 pm, with another 1 to 4
inches by midnight.

To the north and west of the snow, a mix of light snow and
freezing drizzle continues. Sensible heat and moisture flux from
lake superior continues to support shallow convection and
convergence, resulting in bands of snow. Outside of those
convective and convergent bands, precipitation rates are lower and
the column profiles indicate freezing drizzle. Look for the
freezing drizzle potential to diminish this evening as the column
cools, changing over to all light snow before ending.

Snowfall totals and placement are largely unchanged from this
morning with a swath of 8-12 inches across southeast sawyer and
all of price county, and lower totals farther northwest. No
changes to headlines with the afternoon update as the advisory and
warning areas seem well placed.

Long term (Tuesday night through Monday)
issued at 332 pm cst Mon jan 22 2018
the northland is looking at relatively quiet weather for much of
the rest of the week. Weak surface high pressure will move through
the region during the middle of the week, and an upper-level
ridge will build into northland by late Thursday. This upper-level
ridge will bring a plume of warmer air into region, resulting in
a period of milder weather. The northland could get a relatively
warm day late this week depending on the timing of when this wave
of warm air moves through the northland. It currently looks like
the timing of when the axis of warmest air will likely pass
through the northland Thursday evening or early Friday, rather
than during the day Thursday or Friday. If it would pass through
during the daytime, then the warmer air combined with a little
sunshine could really mean a warm day in the 40s. The gfs's timing
is about 6 to 12 hours faster than the european and canadian
model runs, but all three have the axis timing through the
northland Thursday night or early Friday.

A canadian clipper will be on the heels of this plume of warmer
air. This clipper will likely pass near or just north of the
canadian border Friday and Friday night, and it will bring light
and snow through the northland Friday and Friday night. Lingering
snow flurries and cold, blustery winds are possible Saturday and
Saturday night. This latest wind forecast does not reflect these
blustery, gusty winds because of timing differences between the
models generating a blend of overall weaker winds. The GFS is much
faster bringing in the cold air into the northland than the
canadian and european. We will likely increase the wind forecast
once we better determine when that surge of arctic air comes into
the northland, with widespread gust potential of 20 to 30 mph.

Aviation (for the 06z tafs through 06z Tuesday night)
issued at 1142 pm cst Mon jan 22 2018
low pressure will gradually move off to the east as the night
wears on, as high pressure builds into the region. Areas of MVFR
or even ifr cig's will give way to mainlyVFR conditions by
morning. High pressure will then bringVFR conditions for the rest
of the day and into the evening.

Preliminary point temps pops
Dlh 10 23 10 24 10 0 10 10
inl 1 17 4 24 0 0 10 10
brd 14 25 13 27 0 0 10 0
hyr 17 27 7 26 100 10 0 0
asx 18 24 9 25 90 20 10 10

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Update... Dap
short term... Huyck
long term... Grochocinski
aviation... Dap


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 6 mi45 min NNE 7 G 13 18°F 1012.6 hPa (+0.5)11°F
PKBW3 7 mi105 min WNW 4.1 20°F 1013 hPa (+0.0)13°F
SLVM5 - Silver Bay, MN 55 mi42 min N 11 G 19 17°F 1012.2 hPa

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN2 mi50 minN 1610.00 miOvercast21°F15°F80%1012.9 hPa
Richard I. Bong Airport, WI5 mi50 minN 610.00 miOvercast19°F11°F75%1012.9 hPa
Duluth International Airport, MN13 mi50 minN 1110.00 miA Few Clouds14°F9°F80%1013.7 hPa

Wind History from DYT (wind in knots)
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Last 24hrE21NE22
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NE22NE26NE22NE24
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G31
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NE16N13N17N18N19N18N15N17
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1 day agoSW3SW4SW3S3W3CalmCalmCalmCalmE3CalmE3E4E8NE11E13E17E15NE16NE16NE19NE21NE22NE24
2 days agoSW3SW8SW9SW8SW8SW9SW7SW3SW4S3SW6SW6W4SW7SW7SW7SW3SW6SW6SW6CalmW4SW4SW7

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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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Duluth, MN (2,6,7,8)
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Ground Weather Radar Station Duluth, MN
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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.