Thursday, February20, 2020
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Marine Weather and Tides
Bayfield, WI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:02AMSunset 5:41PM Thursday February 20, 2020 9:31 PM CST (03:31 UTC) Moonrise 5:43AMMoonset 2:31PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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LSZ147 Expires:201910010230;;606186 Fzus73 Kdlh 010026 Mwsdlh Marine Weather Statement National Weather Service Duluth Mn 726 Pm Cdt Mon Sep 30 2019 Lsz140>147-162-010230- 726 Pm Cdt Mon Sep 30 2019
.an line of Thunderstorms approaching western lake superior... The areas affected include... Duluth mn to port wing wi... Grand marais to taconite harbor mn... Grand portage to grand marais 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 726 pm cdt, doppler radar indicated a line of Thunderstorms, capable of producing winds to around 30 knots and cloud to water lightning. This area of Thunderstorms was located along a line extending from 13 nm northwest of beaver bay, to 16 nm west of duluth lift bridge channel, moving east at 40 knots. Locations impacted include... Raspberry island lighthouse, split rock bay, castle danger, sand island, barkers island, sugar loaf cove, horseshoe bay and safe harbor, tofte safe harbor, duluth lift bridge channel, twin points safe harbor, tofte, beaver bay, mouth of the cross river, bayfield peninsula sea caves, brule point, herbster, larsmont, superior harbor, 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 4669 9229 4668 9224 4679 9214 4715 9149 4754 9093 4773 9051 4799 8945 4690 9080 4693 9086 4692 9095 4684 9110 4674 9149 4666 9201 4671 9210 4665 9213 4664 9229
LSZ147


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 202329 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 529 PM CST Thu Feb 20 2020

SHORT TERM. (This evening through Friday night) Issued at 335 PM CST Thu Feb 20 2020

Mostly clear skies will continue across the Upper Midwest, as a strong area of high pressure continues moving south through the Great Plains. A dry warm front will move east through the region overnight, with southwesterly winds and warm air advection. Overnight low temperatures for Thursday into Friday will be chilly, with lows in the mid to upper single digits, and colder temperatures across northern Wisconsin.

Skies will remain mostly sunny on Friday, with continued dry air moving into the region. Breezy southwesterly winds with gusts of 20-25 kts are likely Friday afternoon, as winds at the 850 mb level mix down to the surface. Overnight, patchy fog is possible across the region as the warmer temperatures contribute to snowmelt and trap the released moisture under a strong inversion.

LONG TERM. (Saturday through Thursday) Issued at 335 PM CST Thu Feb 20 2020

The warming trend continues on Saturday with a surface high firmly planted over the central midwest. Aloft the low level jet will have moved out of the area bringing less windy conditions for the weekend compared to Friday. Surface winds will flow out of the west southwest. Aloft is ample dry air providing mostly sunny skies with temperatures climbing into the mid to upper 30s.

On Sunday another weather system coming off the front range of Colorado will bring snow and rain to much of the Midwest. However, the surface high pressure building out of the Dakotas will help steer this system to our south as well as the lack of a ridge downstream to give the system any further push north.

We will be on the lookout for some patchy fog or low stratus going into Saturday evening and into Sunday morning. The weak warm air advection we will be seeing throughout the weekend over our deep snowpack could give way to radiational fog. The NAM is heavily favoring this scenario with dewpoint depressions of less than 1 degree, but the GFS is starting to back off its initial assessment with values between 1-2 now.

Monday continues the zonal flow through the Northland. Overcast skies will also start building in late Sunday and into Monday within the mid and upper levels.

Going into Tuesday the weather pattern begins to switch once again with a meridional flow returning. An upper level trough begins to dig in through the Northern plains, which will usher in cold arctic air once again with temperatures steadily dropping Tuesday through Thursday. Wrap around moisture from the exiting low that impacted the central midwest will also bring the chance of flurries Tuesday through Thursday.

AVIATION. (For the 00Z TAFS through 00Z Friday evening) Issued at 526 PM CST Thu Feb 20 2020

Clear skies across the region with a warm front crossing tonight. Models indicate that there may be a thin layer of saturation, so will have to watch for low cloud development, but given the fact that there is nothing currently out there on satellite imagery - opted to keep out of TAF. LLWS will be prevalent as strong winds move in aloft of a strong, but shallow, temperature inversion. Winds above the inversion will peak near 50 knots from the west around daybreak on Friday.

PRELIMINARY POINT TEMPS/POPS. DLH 8 32 14 35 / 0 0 0 0 INL 11 33 12 36 / 0 0 0 0 BRD 8 33 12 36 / 0 0 0 0 HYR 4 35 15 38 / 0 0 0 0 ASX 8 36 19 40 / 0 0 0 0

DLH WATCHES/WARNINGS/ADVISORIES. WI . None. MN . None. LS . None.

SHORT TERM . KL LONG TERM . BJH/Britt AVIATION . Wolfe


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DISW3 - Devils Island, WI 16 mi31 min SW 25 G 32 17°F 1030.3 hPa (-1.0)6°F
SXHW3 - Saxon Harbor, WI 30 mi51 min SSW 13 G 18 14°F 1030.1 hPa

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John F Kennedy Memorial Airport, WI22 mi38 minSW 15 G 2410.00 miFair13°F-2°F49%1033.4 hPa

Link to 5 minute data for KASX

Wind History from ASX (wind in knots)
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Last 24hrW7SW6SW6--W9W7SW7SW7SW9SW9SW8SW10SW13SW11
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1 day agoW9W8W9W8W9W9SW8SW9SW8W8SW8W11SW8SW8W9SW7W10W11W10W9W5W5SW7W6
2 days ago--W4W4N9NW9NW9W8NW10NW12W7W6W6W11W9W16W15
G25
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W14
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G27
W14W9W9SW6

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Duluth, MN (22,6,7,8)
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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 numerous 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.