Monday, March27, 2017 L-36.com


Marine Weather and Tides
Duluth, MN

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 6:53AMSunset 7:33PM Monday March 27, 2017 9:27 PM CDT (02:27 UTC) Moonrise 5:59AMMoonset 6:10PM Illumination 0% Phase: New Moon; Moon at 1 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
LSZ144 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
LSZ144 Expires:201703070830;;132282 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 Duluth, MN
   Hourly   EDIT   Help
location: 46.76, -92.09     debug


Area Discussion for - Duluth, MN
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdlh 272328
afddlh
area forecast discussion
national weather service duluth mn
628 pm cdt Mon mar 27 2017

Update
Issued at 628 pm cdt Mon mar 27 2017
updated for the new 00z aviation discussion below.

Short term (this evening through Tuesday)
issued at 416 pm cdt Mon mar 27 2017
a generally tranquil weather pattern through the beginning of the
work week with the biggest weather concern being fog tonight.

On the synoptic scale a longwave trough digs into the four corners
region tonight into Tuesday with a resulting surface low developing
in the texas panhandle region. To the north, a ridge across the
canadian prairie this afternoon will move eastward through Tuesday,
leading to an area of high pressure building across northern
manitoba. In between, the upper midwest will transition to a nearly
zonal flow at mid to upper levels with weak disturbances moving
across having little impacts to sensible weather.

Tonight skies are expected to clear out initially, but as
temperatures fall areas of fog are expected to develop, especially
north of the iron range in northern minnesota and parts of northwest
wisconsin, especially east of a line from hayward to ashland. Lows
will fall to near 20 in some parts of inland cook county mn,
elsewhere in the mid to upper 20s. Nearly calm wind.

Tuesday will begin with morning fog giving way to mostly sunny
skies. A chance for clouds across northern minnesota due to a a weak
mid-level vort MAX moving east across the region, but no
precipitation is expected. Highs slightly warmer than today in the
50s to near 60, except inland areas of cook county where the snow
pack may keep highs limited to the 40s. East winds off lake superior
may also result in cooler temperatures by the lake.

Long term (Tuesday night through Monday)
issued at 416 pm cdt Mon mar 27 2017
the surface ridge remains over the area Tuesday night and early
Wednesday, with relatively quiet weather for the forecast area. A
weak shortwave moving through the mid levels should bring some cloud
cover to areas along the canadian border Wednesday, but it does not
appear we will have enough moisture for anything more. A strong
upper low that ejects slowly out over the plains on Wednesday is
forecast to move slowly east through Thursday and Friday, and is
likely to spread a bunch of cloud cover our way. Previous model
runs had also brought precipitation into the southeastern portions
of the forecast area, but the latest runs and the trend has been for
this upper low to stay farther south and leave us dry for Thursday
and Thursday night. Friday night and Saturday a fairly potent
shortwave moves through the upper level flow, and should bring some
precipitation chances to the area, mainly across northern minnesota.

For now it looks like we should get a rain/snow mixture, as it
moves through the area at night, and cold air coming in on the back
side of the wave should manage to turn at least some of the area to
snow for the overnight and early Saturday morning hours. Main
concern is for timing and track with this wave, as the ECMWF is much
weaker with it and has less precipitation than the gfs. Confidence
in the forecast beyond Saturday is pretty shaky as the models are
struggling with a trough that moves on shore Saturday night/Sunday,
with the ECMWF much faster and weaker, with a stronger and slower
feature depicted in the gfs. In fact, the GFS feature is so slow a
ridge builds over the midwest and brings warmer temperatures into
the forecast area even as the ECMWF is bringing that wave across the
midwest and bringing cooler temperatures and chances for rain.

Aviation (for the 00z tafs through 00z Tuesday evening)
issued at 628 pm cdt Mon mar 27 2017
high pressure over the region will promote clear skies and very
light wind speeds tonight and early Tuesday. TheVFR conditions
are forecast to continue for much of the period, with the
exception of the a period of mist/fog tonight and early Tuesday.

Fog is possible late tonight, but probably developing until
closer to dawn. The confidence in the fog affecting any terminals
is the greatest for kdlh and khib, but less so for kinl, kbrd, and
khyr. Stuck with brief, 2 to 4 hour windows, of MVFR to as low as
ifr conditions at the terminals. The fog should lift in the
morning shortly after dawn, unless thick stratus develops and
hampers the lifting of the fog. This risk is mainly for kdlh
because morning winds may be from lake superior, providing
moisture input from the lake and orographic lifting processes to
help maintain stratus, if it develops.

Preliminary point temps/pops
Dlh 29 48 29 43 / 0 0 0 0
inl 25 49 29 50 / 0 0 0 10
brd 28 58 32 51 / 0 0 0 0
hyr 27 54 28 50 / 0 0 0 0
asx 28 48 27 44 / 0 0 0 0

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

Mn... None.

Ls... None.

Update... Grochocinski
short term... Jjm
long term... Le
aviation... Grochocinski


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 1 mi39 min Calm G 1.9 39°F 31°F
PKBW3 7 mi147 min N 2.9 46°F 1017 hPa (+1.0)33°F
PNGW3 - Port Wing, WI 37 mi47 min SSE 2.9 G 2.9 32°F 1016.6 hPa
SLVM5 - Silver Bay, MN 56 mi47 min Calm G 1 37°F 1016.6 hPa

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
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
9
PM
Last
24hr
E1
N2
--
E1
W2
SW2
S2
SW2
SW2
SW1
SW3
SW2
SW4
S2
SW1
E1
E2
E2
NE2
NE2
G5
NE4
NE3
NE3
--
1 day
ago
NE13
G20
NE11
G17
NE13
G20
NE13
G18
NE11
G15
NE11
G16
NE9
G15
NE11
G15
NE8
G11
NE8
G13
NE7
G11
NE5
G8
NE5
G8
NE6
G11
NE11
NE9
NE6
G10
NE7
G10
NE4
G7
NE4
NE3
--
NE1
--
2 days
ago
NE10
G13
NE10
G16
NE10
G15
NE11
G15
NE9
G13
NE9
G15
NE8
G14
NE9
G14
NE14
G18
E11
G18
E14
G21
E16
G22
E17
G22
NE19
G23
NE16
G24
NE13
G21
NE15
G27
NE18
G28
NE15
G24
NE20
G27
E17
G24
NE15
G23
NE17
G23
NE13
G20

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN4 mi33 minN 010.00 miFair36°F32°F87%1016.9 hPa
Richard I. Bong Airport, WI5 mi32 minN 010.00 miFair32°F30°F94%1016.9 hPa
Duluth International Airport, MN7 mi32 minESE 410.00 miFair39°F30°F73%1017.7 hPa
Cloquet Carlton County Airport, MN22 mi32 minN 010.00 miFair39°F30°F70%1016.3 hPa

Wind History from DYT (wind in knots)
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
9
PM
Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoNE18NE17NE16NE13NE11NE12NE11NE11NE12NE10CalmNE11NE4NE10NE9NE11CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoNE11NE11NE11NE11NE10NE11NE10NE13E16E18E17E17NE17NE18
G23
NE20
G25
NE22
G27
NE23NE25NE24
G29
NE24NE22NE21
G25
NE20NE19

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 (22,6,7,8)
      (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.