Friday, January19, 2018 L-36.com


Marine Weather and Tides
Bayfield, 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 7:43AMSunset 4:55PM Friday January 19, 2018 10:59 AM CST (16:59 UTC) Moonrise 9:07AMMoonset 7:33PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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
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;;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 Bayfield, WI
   Hourly   EDIT   Help
location: 46.86, -90.85     debug


Area Discussion for - Duluth, MN
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdlh 191137
afddlh
area forecast discussion
national weather service duluth mn
537 am cst Fri jan 19 2018

Short term (today through Saturday)
issued at 326 am cst Fri jan 19 2018
today through Saturday will be quiet with warmer than normal
temperatures, with a weak upper level ridge over the area. A ridge
riding shortwave is moving out of saskatchewan this morning and will
move into ontario by this evening. This shortwave will not have
much of an effect on the forecast area, but may bring some showers
or flurries sprinkles to the iron range on north from about mid
morning through the afternoon and early evening. Pops are very low
and little if any accumulation is expected. Another shortwave will
move along the top of the ridge for Saturday, but that feature is
much weaker and do not expect anything but an increase in cloud
cover for Saturday. Temperatures through the period to be above
normal, with highs today in the 35 to 40 range, though the extra
cloud cover will keep us in the 30 to 35 range for Saturday. Lows
in the 20s tonight put us well above normal, with our overnight low
at dlh warmer than the normal low temperature.

Long term (Saturday night through Thursday)
issued at 326 am cst Fri jan 19 2018
still keeping a close eye on next winter storm that will begin to
affect the northland Sunday evening.

The forecast period begin with a upper trough making landfall on the
west coast then digging deep into the desert southwest. It
eventually closes off then moves east northeast across the midwest
on Monday. In response a lee low will develop over colorado then
eject northeastward from the four corners region on Sunday. By
Sunday evening the surface low should be somewhere in the southeast
ne and northern ks vicinity with the warm front across iowa and
central wi. With the strong warm air advection across the frontal
boundary, expect light snow to form north of the front Sunday
afternoon with the best chance closer to the front across northern
wi. As the low moves northeast into ia Sunday night the
precipitation will spread northward to cover northwestern wi and
into the mn arrowhead. By this time the low will be nearly
vertically stacked and will support some very good snowfall rates
north of the front in the strong frontogenesis zone. At this time
there is still uncertainty where band of heaviest snow will be, but
the trend has been a shift to the south from the original axis
through duluth. This puts northwest wi in the heaviest snow area.

But, pinpointing this area is tricky this far out and will continue
to monitor. The longer range models are still taking the low across
wi, with the ECMWF the most southern with the surface low center
forecast to move over the milwaukee area while the GFS is taking a
more northern route across the door peninsula with the canadian
almost following suit. What we do know is that this storm will
generate strong east to northeast winds across lake superior and
make for a windy time late Sunday night and Monday, especially
closer to lake superior. The falling snow and the wind will also
make for low visibilities. Our first guess for snowfall amounts is 6-
12 inches across pine county, mn and all of northwest wi with much
lesser amounts over the northeast mn. There will be a very sharp
snowfall gradient across the twin PORTS area to aitkin with snowfall
amounts dropping off quickly to the northwest. Again, these snow
areas and amounts are a first guess and could change in the next few
days.

Colder air will be advected south as the low moves away from the
northland. This will set up a period of lake effect snow over
northern wi at least through mid week. Late next week another trough
is forecast to come ashore along the west coast and bring another
low across the midwest. This could bring another round of snow to
the northland beginning Friday

Aviation (for the 12z tafs through 12z Saturday morning)
issued at 530 am cst Fri jan 19 2018
vfr conditions as of issuance time are expected to continue
through at least 00z. A brief period of llws to affect khib this
am, diminishing by 16z, with less shear at the other locations. A
weak front will move through the area and bring a few
sprinkles flurries to kinl and khib in the 14z- 23z time range.

After 00z an area of MVFR stratus will flow into the area from the
north behind the front, moving into kinl, khib and possibly also
kdlh by 12z. For now do not expect any precipitation with this
stratus, though that may change.

Preliminary point temps pops
Dlh 38 23 32 22 10 10 0 10
inl 39 23 30 14 20 10 0 0
brd 38 22 33 22 0 0 0 10
hyr 38 23 35 25 10 10 0 10
asx 40 26 35 24 10 10 0 10

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Short term... Le
long term... Clc
aviation... Le


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 16 mi60 min SSW 7 G 9.9 33°F 998.4 hPa (-2.3)27°F
SXHW3 - Saxon Harbor, WI 30 mi80 min S 13 G 21 37°F 998.3 hPa
SLVM5 - Silver Bay, MN 36 mi58 min WSW 6 G 11 34°F 997.6 hPa

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
SW10
G14
SW9
G12
SW7
W10
G15
W8
W11
G15
W4
NW3
W2
W3
S1
SW2
SW3
W2
SW3
SW7
SW4
SW4
SW5
SW6
SW8
G11
SW8
G12
SW14
SW8
G12
1 day
ago
SW16
G21
SW18
SW17
G21
SW16
G22
SW20
G26
SW13
G18
SW16
G22
SW12
G17
SW13
G17
SW11
G14
SW9
G13
SW8
G13
W5
G9
SW6
W8
G12
SW9
G13
SW10
SW7
G10
SW8
G11
SW11
G14
W10
G13
SW11
G17
SW11
G14
SW10
G13
2 days
ago
NW3
G7
W6
W5
G8
W6
G10
W5
G8
W8
W7
G12
W7
G11
SW7
G10
SW11
SW11
G14
SW12
SW10
G13
SW11
G15
SW13
G18
SW11
G16
SW14
G19
SW14
G18
SW14
G17
SW12
G15
SW9
G14
SW10
G14
SW15
G20
SW16
G20

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

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 24hr--------------------------W5SW3S4S4S5S4S4S4S6S5S7
1 day agoSW12SW12SW16
G21
SW11SW15SW15SW15SW17SW15
G24
SW16
G27
SW21
G28
SW17
G25
SW18
G23
SW12
G21
SW16
G23
SW14
G23
SW16
G25
SW14
G24
----SW11SW10--SW12
2 days agoN12N10NW7NW8NW7NW6W6W7W7SW6SW9W8W9SW9SW8SW8SW7SW9SW9SW10
G18
SW14SW13SW12SW12

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 (11,2,3,4)
      (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.