Friday, October20, 2017 L-36.com


Marine Weather and Tides
Cornucopia, 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 7:33AMSunset 6:12PM Friday October 20, 2017 11:22 AM CDT (16:22 UTC) Moonrise 7:08AMMoonset 6:02PM Illumination 0% Phase: New Moon; Moon at 0 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 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
LSZ146 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 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 201125
afddlh
area forecast discussion
national weather service duluth mn
625 am cdt Fri oct 20 2017

Short term (today through Saturday)
issued at 430 am cdt Fri oct 20 2017
main concerns during the short-term are high temperatures today
and thunderstorms returning to the northland on Saturday.

Southerly return flow is forecast across the northland today
ahead of a developing storm system in the rockies. Fire danger
concerns are lower today thanks to the increasing boundary layer
moisture transport. Temperatures will trend warmer with highs in
the upper 60s in northeast minnesota, to the middle 70s in north-
central minnesota, to near 80 degrees in the st. Croix river
valley.

Clouds will begin filling in across the area this evening and
rain chances gradually build from the south overnight. There could
be a few rumbles of thunder during the early morning hours over
central minnesota. Northward moisture transport continues into
Saturday with precipitable water values climbing into the 1 to 1.5
inch range. The 20.00z GFS features pw of 1.4 inches at inl by
00z Sunday which would be a record value for the date and time
(previous MAX for the day is 1.22 inches). A sharp cool front will
move into minnesota Saturday morning and advance into the CWA by
late afternoon. Instability will be on the increase through the
day with MLCAPE of 500-1250 j kg forecast across our south by late
afternoon. Deep layer shear of 30 to 35 knots will be sufficient
for organized convection and the SPC has highlighted the st. Croix
river valley and much of northwest wisconsin in a marginal risk
of severe storms. A few storms could produce large hail and
damaging wind gusts. Thunderstorms will have ample moisture for
locally heavy rainfall, as well. We've had a decent stretch of dry
weather, but soil moisture analysis indicates much of the recent
rain remains in place, which may lead to very localized ponding of
water in low-lying locales. Will need to watch for autumn leaves
blocking storm drains which could cause localized flooding issues.

With the increase in cloud cover, highs will be a bit cooler, but
still above average for late october with readings in the low to
upper 60s.

Long term (Saturday night through Thursday)
issued at 430 am cdt Fri oct 20 2017
active start to the long term with a front exiting the region
which was covered well in the short term discussion, but the
remnants will linger into the overnight hours on Saturday. Most
stronger storms should be dissipating, but there is a small chance
an isolated cell may still be churning.

A brief break Sunday, but then another wave from a low in western
ontario circles around and brings a threat for rain Sunday night
into Monday. Upper trough to closed upper low lingers in the area
for unsettled weather through Wednesday. Temperatures do take a
dive on Tuesday switching any lingering showers to snow showers.

Thursday should be dry.

Aviation (for the 12z tafs through 12z Saturday morning)
issued at 621 am cdt Fri oct 20 2017
anotherVFR day with llws present at times though a little weaker
than the past couple days. Winds will be gusty again as pressure
gradient increases with an approaching low. Some -shra possible
towards the tail end of the tafs as that system begins to move
into the region.

Preliminary point temps pops
Dlh 71 56 64 46 0 40 100 80
inl 74 58 66 42 0 40 80 60
brd 73 60 65 42 10 50 100 60
hyr 75 58 67 47 0 30 70 80
asx 77 58 70 50 0 30 70 80

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Short term... Huyck
long term... Jw
aviation... Jw


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 mi143 min S 7 G 9.9 59°F 1011.4 hPa (-0.5)46°F
SLVM5 - Silver Bay, MN 29 mi133 min Calm G 1 57°F 1011.2 hPa
SXHW3 - Saxon Harbor, WI 40 mi163 min S 8.9 G 14 61°F 1011.5 hPa
45028 - Western Lake Superior 42 mi123 min SSW 1.9 G 3.9 57°F 56°F50°F
45027 - North of Duluth, MN 47 mi123 min NNE 3.9 G 3.9 52°F 54°F45°F

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
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
10
AM
11
AM
Last
24hr
SW6
G9
SW10
G13
SW8
G12
SW7
G10
SW7
G12
SW4
SW4
NE4
--
SW2
S2
--
W1
--
--
--
N1
SW3
S3
--
N1
NE3
E2
E2
1 day
ago
SW15
G22
SW15
G19
SW9
G13
W23
G28
W15
G21
W14
G21
W8
G11
W6
SW8
SW8
G11
SW10
G13
SW9
G12
SW11
SW10
SW10
G13
SW8
G11
SW8
SW9
SW7
G11
SW6
SW8
SW8
G11
SW6
2 days
ago
SW7
SW7
SW8
SW7
G10
SW7
SW11
G15
SW4
W3
SW5
SW6
SW7
SW5
S3
SW4
SW4
S5
SW4
S4
W3
SW5
SW10
G13
SW11
G14
SW14
G17
SW11
G18

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John F Kennedy Memorial Airport, WI25 mi30 minSSW 9 G 1710.00 miFair68°F48°F49%1011.9 hPa

Wind History from ASX (wind in knots)
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
10
AM
11
AM
Last 24hrSW7SW10SW9S9SW11
G19
S7S6S5S5S5S4S5S6S5S6S5S3S4S4S4S9S11S10S9
G17
1 day agoSW12S16
G23
SW15
G23
SW17
G25
SW15
G23
SW15
G21
W8W7SW7SW10W12
G23
W7SW8SW10SW8SW10SW10SW9SW9SW9SW10SW9SW10SW8
2 days agoSW9SW3S11S10SW8S3S6S5SW5S5S5S4SW4SW6SW10S6SW9S6S4SE346S13
G19
S11
G24

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 (12,3,4,5)
      (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.