Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Bayfield, WI

Version 3.4
What's New / NOTES
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.
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.

Sunrise 5:59AMSunset 8:12PM Wednesday April 25, 2018 8:58 PM CDT (01:58 UTC) Moonrise 2:13PMMoonset 3:16AM Illumination 82% Phase: Waxing Gibbous; Moon at 11 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
LSZ147 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
LSZ147 Expires:201709250215;;437175 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 Bayfield city, WI
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location: 46.86, -90.85     debug


Area Discussion for - Duluth, MN
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Fxus63 kdlh 252350
afddlh
area forecast discussion
national weather service duluth mn
650 pm cdt Wed apr 25 2018

Short term (this evening through Thursday)
issued at 308 pm cdt Wed apr 25 2018
high pressure will shift south of us tonight, and there will be
an approaching cold front from the northwest. The increasing cloud
cover from the northwest and a steady light wind overnight will
bolster our overnight temperatures. Many areas should finally stay
above freezing, unlike recent nights, which only further help the
snow to continue melting.

The cold front will begin moving in after midnight. This front
will bring passing light rain, and maybe a little wet snow, as it
moves through northern and central minnesota in the morning and
northwest wisconsin in the afternoon. Most areas will get a few
hundredths of an inch of rain or less. Drier air will work its way
in the wake of the front, bringing a clearing skies and gusty
northwest winds. Expect widespread gusts of 15 to 25 mph. Highs
should range from the low to middle 50s, but upper 40s in the
arrowhead.

Long term (Thursday night through Wednesday)
issued at 308 pm cdt Wed apr 25 2018
a fairly progressive pattern continues across north america
through the weekend and into next week. A low chance for
precipitation Thursday night across the mn arrowhead, then dry and
becoming warm over the weekend into early next week. High
temperatures will start out in the 50s to low 60s Friday and
Saturday, then warm up to the 60s to mid 70s Sunday and Monday!
precipitation chances return on Monday with a few thunderstorms
possible. It looks not as warm through the rest of the week but
temperatures will still remain on the mild side of normal.

On the synoptic scale a longwave mid-level trough extending from
an upper low near hudson bay will track across the upper great
lakes Thursday night leading to a chance of precip (mainly snow)
across the mn arrowhead into the south shore in northwest
wisconsin. Recent guidance, including the ecmwf, has been trending
on the wet side matching what had been mainly the lone nam
depicting stronger large- scale lift and more precip. Latest
forecast expands our chances for precipitation as well as
precip snowfall amounts, though as the Sun comes up Friday snow
will change to rain with light rain showers or sprinkles possible
into the day Friday.

Friday through Sunday a broad mid upper level longwave ridge
builds across the rockies and east into the great plains with a
broad area of high pressure building from southern manitoba
southeast to the midwest through the weekend. As the high pressure
builds further southeast, warm and moist southerly flow increases
across the great plains into the upper midwest Sunday into
Monday, with precipitable water values over one inch and 850mb
temps +10c to possibly even +15c on Monday, both of which are
values well into the 90th percentile of climatology for both mpx
and inl. This will lead to well above normal surface temperatures
with highs possibly approaching 80 at international falls on
Monday. Rain chances return Monday Tuesday as a warm front lifts
northeast across the region, then a cold front approaches from the
north towards mid-week. In the warm sector a few thunderstorms
are even possible late Monday into Tuesday with MUCAPE values
approaching 1000 j kg.

Aviation (for the 00z tafs through 00z Thursday evening)
issued at 650 pm cdt Wed apr 25 2018
an upper level trough and cold front will move into the northland
tonight passing through on Thursday.VFR conditions will occur
this evening then as the front moves in tonight, MVFR ceilings
will develop along with some light rain or a possible light mix
in spots. Southwest winds will become northwest to north after
frontal passage. There could be a 2 to 3 hour period of llws just
ahead of the front and as it passes. We included at kinl and may
have to expand the mention to the other tafs with later updates.

Conditions will improve toVFR for most areas Thursday afternoon
into early evening.

Preliminary point temps pops
Dlh 38 54 32 52 0 40 40 30
inl 39 50 32 48 60 30 40 20
brd 39 55 36 58 10 50 10 0
hyr 36 56 30 55 0 30 30 30
asx 36 54 29 47 0 30 40 40

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Short term... Grochocinski
long term... Jjm
aviation... Melde


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DISW3 - Devils Island, WI 16 mi58 min SSE 8.9 G 11 44°F 1015 hPa (-2.7)26°F
SXHW3 - Saxon Harbor, WI 30 mi78 min Calm G 1 40°F 1015.2 hPa
SLVM5 - Silver Bay, MN 36 mi58 min ENE 4.1 G 7 36°F 1014.6 hPa (-2.0)

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John F Kennedy Memorial Airport, WI22 mi65 minN 010.00 miFair40°F27°F60%1016.1 hPa

Wind History from ASX (wind in knots)
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Last 24hrN7N8N10N7NE5N6CalmNW3CalmCalmSW3W3NE43CalmCalm33NW5N5N7N5N5Calm
1 day agoS6S7SW4W7SW7W6W3CalmNE12N8NE8NE10NE11NE12NE12NE9NE11NE10NE5E5SE6S5SE3NE3
2 days agoNW4W3S4S3SW4SW4SW4W6CalmS4SW3SW5SW5SW4W7W8--W8SW5SW8SW4S6SW3S3

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.
target = "new">Link to Loop

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 Duluth, MN
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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.