Monday, August21, 2017 L-36.com


Marine Weather and Tides
Superior, 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 6:14AMSunset 8:08PM Monday August 21, 2017 8:41 PM CDT (01:41 UTC) Moonrise 4:58AMMoonset 7:14PM Illumination 0% Phase: New Moon; Moon at 29 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
LSZ145 732 Pm Cdt Tue Aug 8 2017
.a cluster of Thunderstorms over 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 730 pm cdt...doppler radar indicated an area of Thunderstorms... Capable of producing winds to around 30 knots and frequent cloud to water lightning. This area of Thunderstorms was located 10 nm southeast of french river...or 12 nm west of port wing safe harbor... Moving southeast at 20 knots. Locations impacted include... Larsmont...duluth lift bridge channel...port wing safe harbor...brule point...herbster...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 this storm passes. && lat...lon 4707 9163 4685 9107 4682 9118 4683 9121 4673 9151 4668 9184 4678 9215
This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 Expires:201708090100;;088496 FZUS73 KDLH 090032 MWSDLH MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 732 PM CDT TUE AUG 8 2017 LSZ143>146-162-090100-

7 Day Forecast for Marine Location Near Superior, WI
   Hourly   EDIT   Help
location: 46.71, -92.01     debug


Area Discussion for - Duluth, MN
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdlh 212344
afddlh
area forecast discussion
national weather service duluth mn
644 pm cdt Mon aug 21 2017

Update
Issued at 630 pm cdt Mon aug 21 2017
have updated for the showers blooming across the area this evening
in an area of instability ahead that has developed along and ahead
of an inverted trough and shortwave that is going to be moving
through the area this evening. In general have increased both pops
and cloud coverage, with some thunder across the southern forecast
area. Also... Updated aviation section below for 00z TAF taf
issuance.

Short term (this evening through Tuesday)
issued at 321 pm cdt Mon aug 21 2017
an approaching upper-level trough, and embedded shortwaves within
the westerly flow aloft, are and will be bringing areas of
forcing for ascent across the northland through this evening.

Passing surface low pressure across the southern forecast area
will likely interact with this forcing to help produce some
showers and storms across northwest wisconsin late this afternoon
through this evening. The storms should be relatively weak, but
there could be some stronger storms near price county capable of
gusty winds and small hail. The storms could have brief downpours
of rain considering the deep moisture in the atmosphere, with
precipitable water values around 1.5 inches.

Also, the main upper-trough will swing through the northland this
evening and overnight. It could bring a period of clouds and some
light rain over the western forecast area. Drier and cooler air
will filter into the northland amidst the northwest flow
overnight. There should be a clearing trend later tonight. The
winds might be light enough in the early morning to result in some
patchy fog. Lows will range from the upper 40s to lower 50s.

The northland will be in cool northwest flow Tuesday. Sunny skies
in the morning will quickly heat things up and deep mixing will
develop by the afternoon. Windy conditions will develop. The gfs,
nam, and regional canadian models are suggesting the mixing will
be strong enough to draw down 20 to 30 mph flow from aloft. Have
widespread 20 to 25 mph gusts in the afternoon, and some areas
will see occasional gusts to 30 mph, like in duluth. A weak cool
front will dip into far northern minnesota in the late afternoon,
and some light showers will likely develop up there. Highs should
be in the upper 60s and lower 70s.

Long term (Tuesday night through Monday)
issued at 321 pm cdt Mon aug 21 2017
cooler mid to late week with a chance for rain showers this
weekend.

On the synoptic scale northwest flow will prevail across the
upper midwest mid to late week as a longwave mid-level ridge
approaches the great plains. A broad area of high pressure will
build over the upper great lakes, then track eastward this
weekend. A chance for a quick-moving mid-level shortwave to bring
a round of showers late Wednesday or early Thursday, though
confidence in exactly where rain would fall is below normal. A
warm front lifting northeast towards the region on Friday will
lead to increasing clouds and a chance for showers, then
additional chances for precipitation Saturday as a cold front
moves though. Model differences through the weekend lead to a long
period with chances for rain showers, but most solutions are not
a washout for all locations. A few thunderstorms are possible
Saturday and Sunday as the front moves through, but at this point
the threat for storms does not seem sufficient to include a
mention in the forecast.

Temperatures will be cooler than usual mid to late week with
highs in the 60s to near 70 through the long term period. As cool
as the mid 30s for parts of far northern minnesota, though
depending on the track of the mid-level wave coming through
Wednesday night temperatures may not fall as cold as currently
anticipated. Otherwise lows in the 40s to 50s.

Aviation (for the 00z tafs through 00z Tuesday evening)
issued at 630 pm cdt Mon aug 21 2017
showers and a few thunderstorms are moving across the area this
evening, and will continue for at least a few hours as an
inverted trough and upper level shortwave moves across the area.

While sites are generallyVFR, showers thunderstorms may bring a
period of MVFR ceilings with ifr visibilities to each site as they
move across. There may also be a period of MVFR ceilings that
linger behind the showers thunderstorms, but these should clear no
later than 04z most sites, but linger longer at khyr where it may
linger as late as 10z. Otherwise,VFR conditions are expected to
return for the remainder of the TAF period. Northwest winds are
expected to increase after 14z, and should blow around 15 kts with
gusts in the 20-25kt range.

Preliminary point temps pops
Dlh 52 71 50 66 40 0 0 10
inl 47 70 45 67 40 20 0 10
brd 53 72 49 68 10 0 0 20
hyr 51 71 48 67 40 0 0 10
asx 54 72 51 67 40 0 0 10

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Update... Le
short term... Grochocinski
long term... Jjm
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
DULM5 - 9099064 - Duluth, MN 6 mi42 min N 5.1 G 9.9 63°F 61°F
PKBW3 7 mi102 min N 1 66°F 1012 hPa (-1.0)63°F
45028 - Western Lake Superior 12 mi32 min NE 18 G 19 67°F 66°F2 ft67°F
PNGW3 - Port Wing, WI 34 mi62 min WNW 31 69°F 1010.2 hPa
SLVM5 - Silver Bay, MN 55 mi22 min NE 2.9 G 6 61°F 1010.5 hPa

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
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
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last
24hr
W7
G10
W9
NW12
G15
NW11
G15
NW10
G14
NW9
G14
NW6
G10
SE1
SW2
--
SW1
NE1
--
NE2
N1
NE2
E3
E5
E5
G9
E2
G6
NE3
NE4
NE4
N5
G10
1 day
ago
SW4
SW4
SW3
SW3
SW4
SW4
W2
W2
S2
S2
--
SW5
SW6
SW9
G13
SW8
G15
W9
G13
NW11
G16
W9
G15
W10
G13
W7
W10
W9
G12
W7
G10
W7
G11
2 days
ago
W5
SW8
G11
SW5
G9
SW8
G11
W6
G9
SW7
G11
SW9
W13
G16
NW10
G14
NW8
G14
S8
S7
S4
SW6
SW7
G10
SW6
SW9
G12
W9
G13
SW7
G11
SW10
G14
SW7
G11
SW9
G12
SW7
SW5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN2 mi48 minNNE 157.00 miThunderstorm Light Rain in Vicinity63°F60°F94%1009.8 hPa
Richard I. Bong Airport, WI5 mi47 minNE 72.50 miHeavy Rain62°F61°F97%1009.8 hPa
Duluth International Airport, MN13 mi47 minNNE 1110.00 miThunderstorm Light Rain60°F60°F100%1010.6 hPa

Wind History from DYT (wind in knots)
9
PM
10
PM
11
PM
-12
PM
1
AM
2
AM
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
Last 24hrW7SW4NW10S4S4S4S3S3CalmCalmS3S3CalmCalmCalmNE3NE4E9E6NE6NE4NE6NE12N15
1 day agoSW7SW7SW6SW4SW5SW4S3CalmCalmCalmCalmW4SW5W11
G17
SW9SW9W8W10W12W6W11NW12W9W8
2 days agoSW4SW11SW8SW9SW6SW9SW7S5SW9SW9SW8SW8S7S6SW6SW6W9SW12
G15
SW10SW12SW9SW9SW8S7

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 (21,6,7,8)
      (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.