Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Duluth, MN

Version 3.4
NOTICE
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 L-36.com. Allen

Sunrise 6:16AMSunset 8:05PM Saturday August 24, 2019 8:08 PM CDT (01:08 UTC) Moonrise 11:43PMMoonset 2:29PM Illumination 30% Phase: Waning Crescent; Moon at 24 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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LSZ144 808 Am Cdt Tue Aug 20 2019
.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... Port wing to sand island wi... Two harbors to duluth mn... At 807 am cdt, doppler radar indicated a strong Thunderstorm, capable of producing winds to around 30 knots, small hail, and frequent cloud to water lightning. This strong Thunderstorm was located near french river, or 12 nm east of duluth lift bridge channel, moving east at 40 knots towards port wing. Locations impacted include... Brule point, herbster, and bayfield peninsula sea caves. 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 4678 9191 4693 9187 4692 9095 4684 9110 4682 9118 4683 9121 4674 9150 4671 9163
LSZ144 Expires:201908201330;;930312 FZUS73 KDLH 201308 MWSDLH Marine Weather Statement National Weather Service Duluth MN 808 AM CDT Tue Aug 20 2019 LSZ144>146-162-201330-


7 Day Forecast for Marine Location Near Duluth, MN
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location: 46.76, -92.09     debug


Area Discussion for - Duluth, MN
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Fxus63 kdlh 250004
afddlh
area forecast discussion
national weather service duluth mn
704 pm cdt Sat aug 24 2019

Update
Issued at 704 pm cdt Sat aug 24 2019
updated for the 00z aviation discussion.

Short term (this evening through Sunday night)
issued at 330 pm cdt Sat aug 24 2019
dry overnight into early Sunday as high pressure nudges in from
eastern great lakes and quebec. It will be breezy as the pressure
gradient remains tight over the region. This is in response to the
height falls over the northern plains and upper mississippi river
valley due to the shortwave lifting in from the central plains.

Expect strong warm air advection due to southerly flow aloft which
will bring milder readings overnight. Lows range from the upper
40s to the mid 50s.

Expect the first half of Sunday to remain dry, however cloud cover
will be on the increase as the shortwave lifts into the upper
mississippi river valley as the day progresses. The surface low
associated with the shortwave will deepen over southern manitoba.

This will bring gusty southerly winds through the day. During the
afternoon expect shower and thunderstorm chances to increase from
west to east. Utilized the latest high resolution guidance as they
seem to have a good consensus at this point on when precipitation
will begin. Have slight chances of thunderstorms through the
afternoon due to the broad lift, strong southerly advection and a
few hundred j kg of cape. Not overly concerned with a severe
threat during the afternoon due to insufficient instability and
deep layer shear. Highs range from the upper 60s to the mid 70s.

Shower and thunderstorms are expected late on Sunday into early
Monday. There will be increasing deep layer shear overnight as the
low level jet strengthens. Any sort of thunderstorm complex that
holds together as it crosses across the eastern dakotas and
northwest minnesota could pose a severe risk for north central
minnesota. At this point in time it appears the main threat would
be damaging wind gusts. This is highlighted well in the day 2 spc
outlook. In addition, expect heavy rainfall with pwats at or above
the 90th percentile for this time of year and given the setup. Did
lower QPF values compared to the previous forecast to fall more in
line with the latest data. Overnight lows will be milder with
readings ranging from the mid 50s to the low 60s.

Long term (Monday through Saturday)
issued at 330 pm cdt Sat aug 24 2019
a wet and cool start to the work week with dry conditions and
gradual warming trend late-week into next weekend. Highs ranging
from the mid 50s on Wednesday afternoon across far northeast mn to
the mid upper 70s on Fri sat. Low fall to the 40s at the coolest,
with cloud cover during the time the coldest temps will be present
preventing the risk of a widespread frost through next week.

On the synoptic scale a fairly slow-moving pattern aloft with an
longwave trough approaching from the west across southern canada on
Monday and surface low deepening in response across eastern manitoba
and far northwest ontario. An additional reinforcing mid-level
shortwave trough approaches on Tuesday as the stacked mature low
then lifts northward towards hudson bay, though with the upper
midwest upper great lakes remaining in cool and cloudy northwest
flow. Another mid-level shortwave trough may then approach from the
north on Wednesday, bringing with it another chance for rain
showers. Most of the rain is expected to fall early in the week
associated with showers and storms along and ahead of the first cold
front associated with this developing low, but then wrap-around
showers will linger through mid-week. Total rainfall Monday could be
around an inch or more, with subsequent precip chances on Tuesday
and Wednesday not as much, perhaps a tenth to quarter inch at most.

Temperatures will be cool, with highs in the mid 50s to 60s each day
mon tues Wed and lows in the 40s.

Late-week into next weekend a drier pattern emerges as the mature
low lifts north to hudson bay and weakens along with a broad
mid upper level longwave ridge builds over the rockies and east into
the canadian prairie towards the midwest. Temperatures will warm back
up to near normal in the 70s, though recent guidance is trending
towards the cooler side of things.

Aviation (for the 00z tafs through 00z Sunday evening)
issued at 704 pm cdt Sat aug 24 2019
a ridge of high pressure that has kept the weather quiet for the
last couple days is shifting farther east, and an approaching low
pressure system from the west will have increasing influence
through the end of the TAF period. ExpectVFR conditions to
continue through approximately 08z tonight, when some MVFR stratus
and or fog to develop for a few of the TAF sites. This stratus fog
should dissipate again by 14z. Clouds to increase from the west
ahead of the low pressure system, withVFR conditions continuing
through approximately 21z, when MVFR ceilings and showers move
into the area from the west. These to only affect kbrd before the
end of the TAF period, but will spread to the remaining sites
after 00z.

Marine
Issued at 330 pm cdt Sat aug 24 2019
southeast winds at around 10 to 15 knots will persist through the
weekend and into Monday which may cause wave heights to build as
large as 2 to 3 feet along the north shore. Thunderstorms are
possible across western lake superior Sunday night into Monday,
though storms are not expected to be severe.

Following a cold front on Monday, west winds will increase to 10 to
20 knots on Tuesday through Wednesday, with some gusts approaching
30 knots. A small craft advisory will be needed for Tuesday and
Wednesday at the very least, with the possibility for gale-force
gusts Tuesday into Tuesday night.

Preliminary point temps pops
Dlh 54 73 58 69 0 10 80 90
inl 54 73 58 69 0 50 90 90
brd 57 73 60 71 0 50 90 80
hyr 52 74 57 70 0 0 70 90
asx 52 77 58 73 0 0 60 80

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Update... Le
short term... Wl
long term... Jjm
aviation... Le
marine... Jjm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 1 mi56 min N 5.1 G 7 66°F 64°F1021 hPa60°F
PKBW3 7 mi128 min NE 1.9 72°F 1022 hPa (-1.0)60°F
45028 - Western Lake Superior 14 mi38 min S 7.8 G 7.8 67°F 64°F1 ft1021.8 hPa58°F

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN4 mi1.7 hrsESE 410.00 miMostly Cloudy64°F50°F60%1021.7 hPa
Richard I. Bong Airport, WI5 mi93 minSSE 810.00 miMostly Cloudy73°F54°F52%1021.7 hPa
Duluth International Airport, MN7 mi2.2 hrsSE 910.00 miPartly Cloudy71°F54°F55%1021.9 hPa

Link to 5 minute data for KDYT

Wind History from DYT (wind in knots)
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Last 24hrNE17NE12E7NE11NE9NE9NE8E4NE3CalmE4CalmCalmCalmE3E6NE6NE9E7NE9NE12E6E3S9
1 day agoNE11NE12NE12E4CalmCalmCalmCalmCalmCalmCalmS4CalmNE4NE6NE7NE10NE10NE10NE15NE12NE14NE13NE14
2 days agoNW7NW6NW3CalmN7N8N7N5NE7NE8NE8NE6NE6NE6E3NE9NE10E11NE9NE10NE8NE8NE10NE11

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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GOES Local Image of    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 (21,6,7,8)
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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 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.