Friday, June23, 2017 L-36.com


Marine Weather and Tides
Superior, WI

Version 3.4
What's New / NOTES
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 5:13AMSunset 9:08PM Friday June 23, 2017 5:19 AM CDT (10:19 UTC) Moonrise 4:05AMMoonset 7:34PM Illumination 1% 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
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This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 633 Pm Cdt Sat Jun 17 2017
.a strong Thunderstorm 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... Silver bay harbor to two harbors mn... Two harbors to duluth mn... At 632 pm cdt...doppler radar indicated a strong Thunderstorm... Capable of producing winds to around 33 knots and small hail. This strong Thunderstorm was located near larsmont...or 14 nm southwest of split rock lighthouse...moving east at 20 knots. Locations impacted include... Larsmont... Two harbors... Castle danger... And twin points safe harbor. 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 4695 9185 4717 9145 4711 9118 4684 9152
This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 Expires:201706180000;;398039 FZUS73 KDLH 172333 MWSDLH MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 633 PM CDT SAT JUN 17 2017 LSZ143>145-162-180000-

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


Area Discussion for - Duluth, MN
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Fxus63 kdlh 230936
afddlh
area forecast discussion
national weather service duluth mn
436 am cdt Fri jun 23 2017

Short term (today through Saturday)
issued at 435 am cdt Fri jun 23 2017
the next 24 hours are going to be dominated by the large upper low
over the james bay area, producing cyclonic flow over the region.

Shortwaves rotating through this northwest cyclonic flow is going
to bring periodic chances for showers and thunderstorms today
through Saturday. Today, the first and weakest of these waves is
going to move through the area with diurnal effects to help
generate scattered showers mainly for areas along and north of the
iron range, with lower chances farther south. Thunder is possible,
but we just do not develop much CAPE today and have kept the
chances for that relatively low. Clouds to also follow this trend,
with mostly cloudy conditions north and a bit more sunshine to the
south. This extra cloud cover is going to keep conditions cooler
today than yesterday, with highs mainly in the 60s for northern
minnesota, with lower 70s mainly for northwest wisconsin. Tonight
chances for showers continue with a weak surface trough in the
vicinity, also mainly for areas to the north. Lows to be warmer
than this morning as well, staying in the 40s for most locations.

Saturday a stronger shortwave moves through the upper level flow,
but mainly to our southwest, which is going to increase pops
overall compared to today, but will increase the most across the
southern cwa. We will also have more instability around, and
expect a number of garden variety thunderstorms Saturday afternoon
and early evening. Highs Saturday to remain cool in the northwest
flow, with highs only in the upper 50s far north to mid 60s south.

Long term (Saturday night through Thursday)
issued at 435 am cdt Fri jun 23 2017
summary: a broad and slow-moving longwave trough will keep the
northland in a northwest flow pattern through Monday. The main upper
trough will push eastward Tuesday and Wednesday as a ridge to our
west flattens into a quasi-zonal flow for mid-week. A number of
shortwave troughs will rotate through the region during the period
with several chances of showers and thunderstorms.

A broad longwave trough will remain over the area Saturday evening
with a departing shortwave over central and southern wisconsin.

Showers and thunderstorms should be ongoing over the northland and
will gradually diminish in coverage and intensity overnight. Far
northern minnesota has the best chance of keeping scattered showers
overnight thanks to falling heights ahead of another shortwave
trough. The next trough will continue to rotate southeastward across
the northland during the day Sunday. Continued cool air advection
aloft and a few breaks in the cloud cover should yield weak
instability with MUCAPE values between 250 and 500 j kg by mid-
afternoon. Thunderstorms will be possible once again, but severe
weather is not anticipated.

A surface ridge will slide southeastward across the dakotas and much
of minnesota on Monday. Increasing sunshine is expected along with a
break in rain chances. Temperatures will trend warmer but are
expected to remain below seasonal averages. The warming trend
continues into Tuesday as southerly flow develops behind the
departing surface ridge. The increasing northward moisture transport
will set the stage for showers and thunderstorms Tuesday night and
Wednesday. A progressive shortwave trough will move across the
dakotas Tuesday night and into minnesota and wisconsin on Wednesday.

A surface low and cool front will accompany the passing trough.

Deterministic models point to a potential for strong to severe
storms, but confidence is low given the myriad of mesoscale details
which will contribute to any severe weather threat. A few more
thunderstorms will be possible on Thursday as another fast-moving
shortwave races through the region.

Aviation (for the 06z tafs through 06z Friday night)
issued at 1241 am cdt Fri jun 23 2017
the northland will be impacted by a couple upper level low
pressure systems over the TAF period. We should see largelyVFR
conditions overnight, but a weak trough front moving through early
Friday will bring some MVFR cig's to portions of northern and
western TAF sites. These conditions will linger into Friday
evening as well. Some scattered showers will be possible at times.

Preliminary point temps pops
Dlh 67 49 62 48 30 10 30 30
inl 64 48 58 47 30 30 50 50
brd 66 48 62 48 20 10 30 30
hyr 70 50 64 48 20 10 40 20
asx 71 51 64 49 10 20 40 20

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Short term... Le
long term... Huyck
aviation... Dap


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 6 mi50 min WNW 12 G 14 61°F 49°F
PKBW3 7 mi140 min SSE 1.9 55°F 1005 hPa (-1.0)55°F
45027 - North of Duluth, MN 11 mi30 min W 9.7 G 9.7 59°F 55°F49°F
45028 - Western Lake Superior 12 mi30 min WSW 7.8 G 7.8 57°F 55°F1 ft51°F
SLVM5 - Silver Bay, MN 55 mi40 min NW 8 G 13 58°F 1002.4 hPa

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN2 mi26 minW 910.00 miFair61°F51°F72%1003.7 hPa
Duluth International Airport, MN13 mi25 minW 910.00 miFair52°F46°F83%1003.7 hPa

Wind History from DYT (wind in knots)
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Last 24hrCalmS9S6S5SW6SW3SW8SW8SW8W9
G14
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G15
SW13SW13NW18SW5SW8SW8SW9SW9W8W9
1 day agoS4CalmN3NE3NE5E5E5NE7NE11NE7N7NE7E6E5N10NE11NE10E13NE9E8E9N6N4Calm
2 days agoSW7S6W3CalmNW5N6NW6N6
G9
NW8NW9N7NW7NW8NE7E4E4SE3CalmCalmCalmSW4SW4SW4S3

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Duluth, MN (6,6,7,8)
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Ground Weather Radar Station Duluth, MN
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weather_mapweather_map weather_map

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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 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.