Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Cornucopia, WI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:55AMSunset 7:32PM Sunday March 26, 2017 6:02 AM CDT (11:02 UTC) Moonrise 5:23AMMoonset 4:53PM Illumination 1% Phase: Waning Crescent; Moon at 28 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
LSZ146 1100 Pm Cdt Sun Oct 16 2016
.an area of Thunderstorms approaching western lake superior... The areas affected include... Duluth mn to port wing wi... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... Port wing to sand island wi... Silver bay harbor to two harbors mn... Two harbors to duluth mn... At 1058 pm cdt...an area of Thunderstorms 12 nm southwest of barkers island...moving northeast at 40 knots. Locations impacted include... Brule point...duluth lift bridge channel... Superior harbor and barkers island. Precautionary/preparedness actions... Mariners can expect periods of heavy rain...gusty winds around 30 knots...lightning...and locally higher waves. Boaters should seek safe harbor immediately until this storm passes. && lat...lon 4669 9230 4668 9224 4672 9224 4674 9221 4704 9159 4681 9138 4669 9173 4666 9196 4666 9203 4671 9210 4666 9211 4665 9216 4662 9221 4663 9228 4664 9229
This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ146 Expires:201610170430;;985854 FZUS73 KDLH 170400 MWSDLH MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 1100 PM CDT SUN OCT 16 2016 LSZ143>146-162-170430-

7 Day Forecast for Marine Location Near Cornucopia, WI
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location: 46.9, -91.04     debug


Area Discussion for - Duluth, MN
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Fxus63 kdlh 260947
afddlh
area forecast discussion
national weather service duluth mn
447 am cdt Sun mar 26 2017

Short term (today through Monday)
issued at 447 am cdt Sun mar 26 2017
a cutoff low was centered over western illinois early this
morning with an arc of cyclonic vorticity advection over southern
minnesota through northern wisconsin. Drizzle and freezing drizzle
continued over portions of east-central and northeast minnesota,
including the twin PORTS and along the north shore. A more intense
area of precipitation was over northern wisconsin. Numerous
"unknown precipitation" reports have been received as the band
lifted northwest across central wisconsin. Surface air
temperatures remain a few degrees either side of freezing, but
mndot rwis pavement temperatures are above freezing. Checked with
local law enforcement agencies and no reports of slippery roads
had been received through 3 am. No changes to the winter weather
advisory for iron county, but will make more phone calls in the
next few hours. May need to extend the headlines farther west
should ground truth support more freezing rain than presently
expected. Regional radar mosaic indicates a broad area of showers
behind the initial precipitation band. Think the showers will lift
into the northland later this morning and linger into tonight.

Temperatures will gradually warm today with precipitation changing
back to all rain by mid to late morning. Nudged high temperatures
a bit cooler for this afternoon due to continued cloud cover and
limited heating.

Another shortwave trough over the rockies this morning will kick
the cutoff low eastward tonight. Look for the showers to decrease
in coverage and slide eastward overnight. Temperatures should cool
into the middle 20s to low 30s. Precipitation may change back to
a wintry mix overnight. Another ribbon of cyclonic vorticity will
stretch northward from the second shortwave over the central
plains tonight and Monday, while a northern stream trough pushes
across the canadian prairies and into the upper midwest. The
coverage and intensity of precipitation may increase during the
day Monday as these features move through the area. Held onto pops
over northwest wisconsin where additional precipitation is most
likely.

Long term (Monday night through Saturday)
issued at 447 am cdt Sun mar 26 2017
an upper level short wave trough will clip the arrowhead and
northwest wisconsin Monday night. This will generate the last of a
few showers over price county, where the best moisture is
available, early in the evening before ending. High pressure will
be covering the rest of the forecast area. Surface and upper level
ridging will cover the region Tuesday through Wednesday.

Wednesday night through Friday finds a series of upper shortwaves
traveling across the area. Meanwhile, a vertically stacked system
will be moving through the central plains. Also, surface high
pressure will be nearby. Long range models begin to diverge on the
handling of these features. The ecmwf/gem are the wettest with
precipitation chances along the southern half of the forecast area
through Thursday night. The GFS keeps the region dry with ridging
affecting the area. Used a blend to account for these issues.

This also affects the p-types. Will keep it simple for now with
rain during the day, rain/snow mixed in the evening and snow
overnight. Friday and Friday night finds the GFS and ECMWF with
ridging over the region, the gem has that previously mentioned
stacked system drifting through wisconsin. Maintained the blended
approach here as well. On Saturday, the gem/ecmwf have ridging
nearby, while the GFS brings a shortwave through the area with a
cold front. More blending was conducted on Saturday. Temps will be
running near to slightly above normal.

Aviation (for the 06z tafs through 06z Sunday night)
issued at 1209 am cdt Sun mar 26 2017
an area of surface low pressure was located along the northeast
missouri and western illinois border as of late evening. The low
will move northeast toward southern lake michigan and southwest
michigan by early Sunday evening. An upper level disturbance was
also moving through the northland this evening. These features
will bring a chance for rain, freezing rain, and possibly some
sleet to portions of the northland, especially over northwest
wisconsin. Freezing drizzle has also developed further northwest
into the kcoq/kdlh/ktwm/kbfw areas. Areas of precipitation will be
possible through late Sunday or Sunday evening. Temperatures will
warm through the day so mainly rain will occur. We did keep a
mention of freezing rain at khyr later tonight. We also have a
period of freezing drizzle at kdlh. The freezing drizzle in the
kdlh area may diminish later tonight as the low level flow weakens
off of lake superior possibly warming temperatures and leading to
weaker orographic lift.

Mainly MVFR/ifr conditions will prevail through the period with
some possibleVFR conditions developing at kbrd/kinl late in the
day or in the evening hours.

Preliminary point temps/pops
Dlh 37 30 42 28 / 70 20 10 0
inl 46 29 45 26 / 0 0 0 0
brd 43 33 52 31 / 20 10 10 0
hyr 42 31 44 27 / 40 40 20 10
asx 38 31 41 27 / 60 30 20 10

Dlh watches/warnings/advisories
Wi... Winter weather advisory until 9 am cdt this morning for wiz004.

Mn... None.

Ls... None.

Short term... Huyck
long term... Gsf
aviation... Melde


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PNGW3 - Port Wing, WI 20 mi82 min NE 7 G 8 33°F 1017.3 hPa
DISW3 - Devils Island, WI 21 mi62 min E 6 G 8 33°F 1018 hPa (-1.7)33°F
SLVM5 - Silver Bay, MN 29 mi61 min ENE 8.9 G 15 33°F 1017.3 hPa
SXHW3 - Saxon Harbor, WI 40 mi82 min Calm G 0 32°F 1016.6 hPa

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ashland, Kennedy Memorial Airport, WI25 mi69 minN 05.00 miUnknown Precip Fog/Mist32°F30°F96%1017.8 hPa

Wind History from ASX (wind in knots)
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Last 24hrE10NE8NE11NE10NE12NE11NE10NE12NE11NE15
G20
NE13NE10NE7NE9NE9NE10NE9E8E9NE4N3NE3CalmN3
1 day agoCalmNW3NW5N8N7N9N9NE9N8NE11NE9NE8NE7NE9NE9NE8E12NE9E11NE7NE8E7NE8NE9
2 days agoSE5S4S5S8S6S6------S6S7CalmE3CalmNW6CalmS3CalmCalmCalmCalmCalmCalmS3

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 (7,2,3,4)
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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.