Saturday, April29, 2017 L-36.com


Marine Weather and Tides
Superior, WI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:52AMSunset 8:18PM Saturday April 29, 2017 12:24 AM CDT (05:24 UTC) Moonrise 7:43AMMoonset 11:09PM Illumination 11% 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
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This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 203 Am Cst Tue Mar 7 2017
.an area 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... Silver bay harbor to two harbors mn... Two harbors to duluth mn... At 201 am cst...doppler radar indicated an area of Thunderstorms... Capable of producing winds to around 30 knots...small hail...and frequent cloud to water lightning. This area of Thunderstorms was located 10 nm west of port wing safe harbor...moving north at 40 knots. Locations impacted include... Castle danger...brule point...and twin points safe harbor. Precautionary/preparedness actions... Mariners can expect wind gusts up to 33 knots...locally higher waves...cloud to water lightning strikes...small hail...and heavy downpours. Boaters should seek safe harbor until these storms pass. && lat...lon 4704 9169 4716 9147 4720 9133 4673 9154 4672 9174
This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 Expires:201703070830;;778810 FZUS73 KDLH 070803 MWSDLH MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 203 AM CST TUE MAR 7 2017 LSZ143>145-162-070830-

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 282340
afddlh
area forecast discussion
national weather service duluth mn
640 pm cdt Fri apr 28 2017

Update
Issued at 640 pm cdt Fri apr 28 2017
please see the 00z aviation discussion below.

Short term (this evening through Saturday)
issued at 405 pm cdt Fri apr 28 2017
at 4 pm, there were two distinct cloud areas across the
northland. The first was in the minnesota arrowhead, and the
second was along the southern tier of counties. Areas from the
brainerd lakes region northward were generally sunny. Temperatures
ranged from the lower 30s in portions of the arrowhead to the
lower 50s in east central minnesota.

High pressure will continue to build into the northland overnight,
allowing skies to generally clear for most areas. The greatest
cloud cover should be limited to the southeastern areas, due to
some cirrus moving through that area. Will continue to forecast
lower than MOS temperatures overnight, as we should see effective
radiational cooling across much of the region. Temps should range
from the teens in portions of the north, to the 20s elsewhere.

Saturday is shaping up to be a warmer day with considerable
sunshine. Most areas will see temperatures rise into the 50s.

Long term (Saturday night through Friday)
issued at 405 pm cdt Fri apr 28 2017
the main focus for the long term continues to be a potential winter
storm Sunday through Tuesday morning.

Deterministic and ensemble models are in reasonably good agreement
handling a deep trough of low pressure moving across the southern
rockies Saturday evening and lifting toward northeast ontario by
Tuesday afternoon. The surface low will lift from northern texas
Saturday evening through southwest minnesota and northern wisconsin
to northeast ontario by Tuesday morning. This storm track is similar
to the conceptual model for a panhandle hook. Abundant moisture will
stream northward ahead of the system with pwat values increasing 0.6
to 1.0 inches by Sunday evening. Have raised QPF values above
consensus values, which included too many dry/light members.

Temperatures continue to be a challenge with this system and many
details will remain unresolved until Sunday. Depending on where the
heaviest mesoscale precipitation bands set up, the potential for
significant snow accumulation exists. Deterministic thermal fields
suggest a rain/snow/sleet/freezing rain mix. However, precip rates
and diabatic cooling should result in a swath of all snow.

Precipitation will likely start as all rain, before changing to a
wintry mix. Areas of northwest wisconsin and portions of the eastern
arrowhead should be the last to change over late Sunday night. Along
with the potential for significant snow accumulation, sleet and
freezing rain are possible with up to two-tenths of an inch of ice
accretion possible. Winds will be strong over western lake superior
and likely areas inland along the south shore to the twin ports. The
ice and heavy, wet, snow may result in sporadic power outages.

Anyone with travel plans Sunday afternoon through Tuesday should
keep up with the forecast through the weekend.

Cyclonic flow will persist over the northland Tuesday into
Wednesday. While the main precipitation will likely have ended,
scattered showers will continue into Wednesday morning. Another
shortwave trough will move through the area Wednesday night and
Thursday, raises the spectre of a few rain or snow showers.

Aviation (for the 00z tafs through 00z Saturday evening)
issued at 640 pm cdt Fri apr 28 2017
vfr through the forecast as high pressure builds in from the
northern plains. Due to the relaxed pressure gradient winds will
remain light through the forecast. Winds will gradually shift from
a northerly direction to a northeasterly direction through the
forecast per the latest forecast guidance.

Preliminary point temps/pops
Dlh 26 48 30 44 / 0 0 0 30
inl 20 54 28 55 / 0 0 0 0
brd 25 56 32 50 / 0 0 10 30
hyr 24 52 31 47 / 0 0 20 50
asx 26 47 30 43 / 0 0 10 40

Dlh watches/warnings/advisories
Wi... None.

Mn... None.

Ls... None.

Update... Wl
short term... Dap
long term... Huyck
aviation... Wl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 6 mi54 min NNE 1.9 G 4.1 39°F 26°F
PKBW3 7 mi144 min NNW 1.9 42°F 1020 hPa (+5.0)27°F
PNGW3 - Port Wing, WI 34 mi44 min SSE 2.9 G 2.9 31°F 1021.7 hPa
SLVM5 - Silver Bay, MN 55 mi44 min N 6 G 9.9 39°F 1021.3 hPa

Wind History for Duluth, MN
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W7
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G12
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G17
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G23
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N4
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NW4
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NW6
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NE21
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G22
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G12
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G9
N6
G9

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN2 mi30 minE 310.00 miFair37°F33°F87%1022 hPa
Richard I. Bong Airport, WI5 mi29 minENE 310.00 miFair35°F29°F79%1022 hPa
Duluth International Airport, MN13 mi29 minN 410.00 miA Few Clouds34°F25°F70%1022.5 hPa

Wind History from DYT (wind in knots)
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Last 24hrSW9W8W12W10W10
G15
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W16W11W12
G19
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W5
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W6NW10
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NW6NW8
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N10N11N10NE8E4Calm
1 day agoN8N9N7N8N11N12N7N8NW8N8NW10W13NW13
G16
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G18
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G20
NW8W14
G17
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G20
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W10W13W11W12W9
2 days agoNE23NE24
G29
NE28
G33
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G34
NE22
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G32
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NE19NE18
G25
NE14NE13NE12
G15
N8N12N15N16N14N11N11N8

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 (1,6,7,8)
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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.