Saturday, August17, 2019

Marine Weather and Tides
White Pine, MI

Version 3.4
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at Allen

Sunrise 6:07AMSunset 8:17PM Saturday August 17, 2019 9:30 PM CDT (02:30 UTC) Moonrise 8:28PMMoonset 6:52AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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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LSZ241 109 Pm Edt Mon Aug 5 2019
.strong Thunderstorms over the waters... The areas affected include... Black river to ontonagon mi... Lake superior from saxon harbor wi to upper entrance to portage canal mi 5nm off shore to the us/canadian border including isle royal national park... Ontonagon to upper entrance of portage canal mi... At 109 pm edt, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots. These Thunderstorms were located along a line extending from 13 nm southeast of the western lake superior buoy to 26 nm east of saxon harbor, moving northeast at 40 knots. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4724 8970 4761 8863 4713 8870 4697 8893 4695 8910 4682 8934 4678 8976 4674 8982
LSZ241 Expires:201908051815;;162555 FZUS73 KMQT 051709 MWSMQT Marine Weather Statement National Weather Service Marquette MI 109 PM EDT Mon Aug 5 2019 LSZ241-242-263-051815-

7 Day Forecast for Marine Location Near White Pine, MI
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location: 46.86, -90     debug

Area Discussion for - Marquette, MI
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Fxus63 kmqt 180012
area forecast discussion
national weather service marquette mi
812 pm edt Sat aug 17 2019

Short term (this evening through Sunday)
issued at 330 pm edt Sat aug 17 2019
other than the potential for some sprinkles this afternoon along
the lake superior breeze that has come onshore, aided by a weak
wave traversing through out ahead of the main trough still back
over in mt saskatchewan, benign weather prevails until the
approach of a frontal boundary tomorrow. Pre-frontal activity is
expected to grace the western u.P. With its presence by around or
just shortly after dawn, with instability already on the increase
by then. As the morning continues, look for this convective
activity to spread north and eastward, with the thunder potential
decreasing from south to north. With ample shear moving into the
area, the limiting factor for any sort of more robust activity
will be the instability, although there are some hints that
locations closest to the wi border could see a brief window by
midday tomorrow of a few feisty storms attempting to impact the
area. If the pre-frontal activity ends up slowing down more so
than currently anticipated, the stronger storm potential will
likely then increase, something to keep in mind heading into
tomorrow's outdoor activity planning. Regardless of which scenario
ends up playing out, moderate rain will be possible, with locally
heavy rain not out of the question, given the increase in pwats
expected overnight. Some model soundings are depicting the skinny
cape moist profile scenario indicative of moderate to heavy

With dewpoints on the rise tonight, some fog will be possible in
prone locations, with lows struggling to drop below the mid 50s in
the interior, and remaining in the 60s along the lakeshores.

Expected cloud coverage by the start of the day will keep highs
tomorrow moderated, topping out in the 70s just about everywhere,
lingering on the cooler side of those 70s in the west, higher in
the east.

Long term (Sunday night through Saturday)
issued at 222 pm edt Sat aug 17 2019
a relatively benign forecast is expected through the extended
period, with realistic precipitation chances relegated to Sunday
night, Tuesday afternoon and evening, and late Friday afternoon into
the weekend, with ample uncertainty in the evolution of next
weekends forecast. Otherwise, quick moving high pressure passing to
our south will bring warm and dry conditions Monday through Tuesday
morning, and returning high pressure combined with a mid-level low
spinning across northeastern canada will bring cooler, drier
northwesterly flow for Wednesday and Thursday. Return flow will
begin to warm things back up again Friday.

Sunday night, an exiting trough axis embedded shortwave will allow
for lingering showers and weak thunderstorms over the eastern upper
peninsula, but these should exit by around or just after midnight. A
little patchy fog can't be ruled out over the interior, but winds
may remain just enough to keep the pbl well mixed. Surface high
pressure will then move into the region, skirting across wisconsin
during the day Monday. Decent low level mixing is expected and a
relatively dry airmass will lead to 25-30+ degree dew point spreads.

The dry air could locally lead to relative humidities dipping below
30 percent, but winds will be light for all locations except the
keweenaw peninsula where some afternoon gusts are possible out of
the sw. Fire weather concerns would thus be limited to the far
northwestern up on Monday, and even then only if enough dry air
mixes to the surface.

We will remain under moderate SW flow on Tuesday, and inland
temperatures will reach the low to mid 80s ahead of a trough and
associated cold front that should kick off a few showers and storms
Tuesday afternoon. Could eek out enough instability for a marginally
severe thunderstorm Tuesday afternoon evening over the inland west.

As high pressure builds from the plains to the upper mississippi
valley Wednesday, a strengthening pressure gradient over the upper
great lakes will lead to gusty NW winds and could reach small craft
advisory criteria on lake superior. Some models indicate a second
wave embedded in the flow around the canadian low that may lead to an
isolated shower on Thursday over the east half, but better precip
chances should hold off until later on Friday and especially
Saturday after the high exits to the east.

Aviation (for the 00z tafs through 00z Sunday evening)
issued at 803 pm edt Sat aug 17 2019
vfr conditions will prevail through tonight. As a frontal boundary
approaches early Sunday, showers and lower CIGS will move in along
with an increase in winds. CIGS should drop to or just below ifr
during the periods of heavier rain at kiwd by late morning and in
the afternoon at kcmx and ksaw. Thunderstorms may also be possible,
but confidence was not high enough for mention in the taf.

Marine (for the 4 pm lake superior forecast issuance)
issued at 312 pm edt Sat aug 17 2019
fog low-level stratus today will continue to burn off dissipate
across the eastern portions of lake superior as the day continues.

Otherwise, benign weather conditions prevail on the lake today,
with a change expected overnight as a frontal boundary approaches
the upper great lakes. Winds will be on the increase overnight
through tomorrow night, with gusts approaching and perhaps
exceeding 20 knots. Winds will remain elevated into the start of
the work week as a tight pressure gradient overhead allows
for gusts to reach toward 25 to near 30 knots on Monday. Look for
winds to drop back off to less than 20 knots on Tuesday, with a
quick return of over 20 knots reappearing by Wednesday. For
Thursday into at least the early part of Friday, winds are
anticipated to remain less than 20 knots. As for hazards to marine
interests (other than winds), thunderstorm chances exist for
tomorrow and then again on Tuesday as disturbances pass on

Mqt watches warnings advisories
Upper michigan...


Lake superior...


Lake michigan...


Short term... Lg
long term... Kcw
aviation... Jlb
marine... Lg

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SXHW3 - Saxon Harbor, WI 31 mi51 min SSW 2.9 G 4.1 71°F 1007.8 hPa
45006 - W SUPERIOR 48NM North of Ironwood, MI 35 mi41 min SE 9.7 G 12 68°F 65°F1007.3 hPa (-0.0)
DISW3 - Devils Island, WI 41 mi31 min SSW 8 G 11 74°F 1007.8 hPa (+0.6)60°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ironwood, Gogebic-Iron County Airport, MI23 mi35 minN 010.00 miFair65°F60°F84%1009.2 hPa

Link to 5 minute data for KIWD

Wind History from IWD (wind in knots)
Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3SW6W6SW7W5SW5SW9SW5SW6SW4S6S3Calm
1 day agoS5S4S33CalmS7S663SE6E3S6S5S4SE34S4NW43N4NW5NW4CalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW5W63W5SW8S5W5S3CalmS3S4S3

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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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.
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Wind Forecast for Marquette, MI (22,6,7,8)
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Ground Weather Radar Station Marquette, MI
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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 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 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.