Thursday, April27, 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 5:56AMSunset 8:15PM Thursday April 27, 2017 2:15 AM CDT (07:15 UTC) Moonrise 6:05AMMoonset 8:45PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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
    EDIT      (on/off)   Help
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
   Hourly   EDIT   Help
location: 46.9, -91.04     debug


Area Discussion for - Duluth, MN
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdlh 270441
afddlh
area forecast discussion
national weather service duluth mn
1141 pm cdt Wed apr 26 2017

Update
Issued at 655 pm cdt Wed apr 26 2017
the precipitation has ended over the arrowhead and have dropped
the advisory. The anticipated light freezing rain event due to
affect ashland, iron and price counties has slowed per latest
short term models and have adjusted the start time of the advisory
to better match the onset of the freezing rain. Elsewhere, as an
upper low meanders around the red river valley of the north, some
light snow is falling from international falls to near staples.

This is because of a vorticity MAX rotating around the upper low
over this area. Near the head of lake superior, a northerly flow
over the lake was resulting in some light mixed precipitation
types from douglas to bayfield, and pine to burnett and washburn
counties. Made some adjustments based on these trends.

Short term (this evening through Thursday)
issued at 333 pm cdt Wed apr 26 2017
a low over northeast wisconsin will lift into eastern lake superior
this evening. Meanwhile, an upper low over southeast north dakota
will slowly shift east into northwest minnesota through this
evening. The low, which brought a surge of moisture aloft northward
into the northland last night and this morning, combined with
unseasonably cold northerly low-level flow to produce widespread
freezing rain, sleet, and snow across much of the northland. The
worst conditions of this wintry weather occurred early this morning,
and the precipitation will continue lifting north and diminishing
through this evening as drier air aloft works its way into the
northland from the south. Only low chances of drizzle, freezing
drizzle, and very light snow are forecast for much of the northland
by late this afternoon through this evening. The eastern arrowhead,
which was under an ice storm warning, will have a winter weather
advisory in effect for this evening for freezing drizzle and
light snow this evening. The winter weather advisories have been
cancelled for the rest of NE mn and a portion of NW wi except for
ashland and iron counties which has been extended to price
county.

Cold air will continue to wrap into the northland tonight and early
Thursday as that upper low wobbles around over northwest minnesota.

Temperatures will drop well into the 20s. Another area of low
pressure will lift from illinois this evening to eastern lake
superior by Thursday afternoon. It will bring another surge of
moisture northward to the region late tonight and Thursday, possibly
bringing precipitation as far west as some parts of northwest
wisconsin (such price/iron/ashland counties) and the tip of the
arrowhead. The latest models have generally shifted that
precipitation farther east, so was able to decrease the
precipitation chances and amounts across the eastern forecast area.

This next round of precipitation could bring additional freezing
rain and snow, with potential light amounts of glazing from any
freezing rain. As mentioned above, the winter weather advisory has
been expanded to include price county for tonight and Thursday
morning to price county for the freezing rain and light snow
threat.

The precipitation near the eastern forecast area will move away from
the forecast area in the afternoon. Meanwhile, the upper low over
northwest minnesota will lift to north central minnesota, and cold
and drier air will work its way into the northland amidst amids a
cold north-northwest breeze. There could be some very light snow
across northern minnesota, but little if any accumulation. Highs
should reach the upper 20s and lower 30s in northern minnesota,
while the middle and upper 30s in northwest wisconsin to central
minnesota.

Long term (Thursday night through Wednesday)
issued at 333 pm cdt Wed apr 26 2017
a vertically stacked low will move northwards from ontario on
Thursday evening into hudson bay by Friday evening. Precipitation
chances will gradually diminish from south to north through Friday,
as the 500 hpa cutoff rotates northward. Precipitation will
initially be all snow before surface temperatures warm into the
upper 30's and 40's throughout the northland.

A low amplitude ridge will build into the northland from the
northern plains on Saturday into Saturday evening. This will provide
a respite from precipitation with milder temperatures in comparison
to Thursday and Friday. Highs range from the 40's adjacent to the
lake superior shoreline, to the 50's inland.

Precipitation chances return Sunday into Monday. At 500 hpa a potent
positively tilted trough will dig from the intermountain west on
Saturday, and become neutrally/slightly negatively tilted as it
moves into the central plains and mid mississippi river valley on
Sunday. The surface response will be lee cyclogenesis across the
southern plains on Sunday. The low will lift north northeastward
into upper midwest, which will spread precipitation in from south to
north on Sunday into Monday. The latest ECMWF shifts the lows track
farther west when compared to the previous ecmwf. This is more in
line with the previous and latest gfs. The only outlier in
deterministic guidance at this point is the gem where the low moves
across eastern wisconsin. If the gem solution verifies it would
bring little to no precipitation to much of northeast minnesota,
whereas the gfs/ecmwf would bring precipitation to northeast
minnesota. Precipitation chances from this system could linger into
Tuesday, however there are timing differences with the GFS moving
the system out faster in comparison to the ecmwf/gem. While it is
still too early to determine specific precipitation types for this
system, a wintry mix of freezing rain, sleet, snow and rain are
possible if the thermal profiles from the latest guidance hold true.

Those with travel plans on Sunday and early next week should stay
tuned for future updates. High temperatures will fluctuate through
the extended period, while lows remain generally in the 20's and
30's throughout the northland. Despite the fluctuating highs,
temperatures will remain below normal through the extended.

Aviation (for the 06z tafs through 06z Thursday night)
issued at 1141 pm cdt Wed apr 26 2017
expect MVFR ceilings through the forecast, with some isolated
pockets of ifr. Snow showers will be in the vicinity of brd
through the first part of the forecast. Mixed precipitation will
be in the vicinity of hyr around 13z. Confidence is low on
precipitation actually affecting these terminals, so vcsh used. As
the upper low departs late in the forecast, some additional
showers may be found in the vicinity of all terminals but brd.

Preliminary point temps/pops
Dlh 23 34 26 44 / 20 20 20 10
inl 20 32 24 42 / 20 30 40 20
brd 24 39 27 47 / 20 20 10 10
hyr 28 38 26 46 / 20 40 10 10
asx 27 37 27 45 / 30 50 20 10

Dlh watches/warnings/advisories
Wi... Winter weather advisory from 4 am to noon cdt Thursday for
wiz003-004-009.

Mn... None.

Ls... Small craft advisory until 10 am cdt Thursday for lsz121-140>148.

Update... Gsf
short term... Stewart
long term... Wl
aviation... Gsf


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DISW3 - Devils Island, WI 21 mi76 min N 11 G 14 28°F 1003.9 hPa (-0.6)24°F
SLVM5 - Silver Bay, MN 29 mi36 min NNE 11 G 16 26°F 1002.7 hPa
SXHW3 - Saxon Harbor, WI 40 mi36 min NE 13 G 16 31°F 1002 hPa

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last
24hr
NE17
G24
NE17
G25
NE21
G28
NE20
G29
NE9
G15
NE12
G17
NE13
G18
NE11
G17
NE14
G22
NE10
G16
NE12
G16
E6
G11
NE8
G13
NE6
G9
N4
G7
N4
G10
N4
G8
N8
G13
N7
G14
N6
G12
N5
G9
N6
G9
N4
N7
G10
1 day
ago
E4
G13
NE8
G13
NE10
G13
NE8
G12
NE4
G9
NE4
G8
NE6
NE2
NE4
G7
NE2
G5
NE4
G8
E2
G5
NE4
G8
NE8
G11
NE7
G11
NE5
G11
NE6
G10
NE8
G13
NE10
G13
NE9
NE7
G10
NE13
G21
NE13
G18
NE14
G22
2 days
ago
NE19
G27
NE22
G30
NE23
G29
NE20
G26
NE17
G25
NE21
G26
NE16
G23
NE21
G29
NE18
G26
NE23
G31
NE18
G29
NE19
G29
NE20
G28
NE15
G25
NE19
G28
NE11
G18
NE20
G25
NE18
G26
NE17
G23
NE12
G20
NE8
G14
NE10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ashland, Kennedy Memorial Airport, WI25 mi23 minNNE 78.00 miOvercast28°F26°F92%1003.1 hPa

Wind History from ASX (wind in knots)
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last 24hrNE15
G24
NE19
G28
NE14
G24
NE16
G32
NE25
G31
NE19
G29
NE22
G31
NE17
G27
NE16
G25
NE16
G25
NE19
G28
NE16
G26
NE14
G22
NE16
G22
N13
G19
N12
G22
NE11N14NE13N10N11N10N9N7
1 day agoNW9CalmSE4NE5NE4N4NE5N4NE7NE6N9NE8N8NE11NE15
G21
NE8
G21
NE16
G21
NE19
G26
NE16
G22
NE17
G23
NE13NE14
G24
NE17
G23
NE17
2 days agoNE9NE9NE7NE8NE8NE10NE8NE9NE10NE9
G17
N14NE11--N11NE14NE13
G20
NE8NE9NE6E5NE5NE8E3Calm

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Duluth, MN (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Duluth, MN
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.