Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Pleasant Prairie, WI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 7:10AMSunset 4:56PM Wednesday January 24, 2018 5:44 AM CST (11:44 UTC) Moonrise 12:15PMMoonset 12:37AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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
LMZ646 Wind Point Wi To Winthrop Harbor Il- 505 Am Cst Wed Jan 24 2018
Today..Northwest wind 5 to 10 knots backing west late in the afternoon. Chance of flurries late in the morning. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late morning and afternoon.
Tonight..West wind 5 to 10 knots backing southwest 5 to 15 knots after midnight, then becoming 10 to 15 knots early in the morning. Mostly cloudy through around midnight then becoming partly cloudy. Waves around 1 foot.
Thursday..South wind 10 to 15 knots. Mostly Sunny. Waves 1 to 2 feet.
Thursday night..Southeast wind 10 to 15 knots veering south late in the evening, then becoming south 10 to 15 knots with gusts to around 20 knots after midnight rising to 15 to 20 knots early in the morning. Mostly clear. Waves 1 to 3 feet building to 2 to 4 feet after midnight. Wave heights are for ice free areas.
LMZ646 Expires:201801241700;;921935 FZUS53 KMKX 241105 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 505 AM CST Wed Jan 24 2018 For waters within five nautical miles of shore on Lake Michigan LMZ646-241700-

7 Day Forecast for Marine Location Near Pleasant Prairie, WI
   Hourly   EDIT   Help
location: 42.52, -87.84     debug


Area Discussion for - Milwaukee/Sullivan, WI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kmkx 241111
afdmkx
area forecast discussion
national weather service milwaukee sullivan wi
511 am cst Wed jan 24 2018

Update
Looks like the mid level wave moving through is indeed helping to
seed the lower status to produce some flurries. These should clear
the madison area by 8-9 am this morning and the southeast later in
the morning. No accumulation is expected.

Aviation(12z tafs)
MVFR conditions will likely linger into the early evening across
southern wisconsin. There is uncertainty with that and it may end
up clearing sooner, but the pessimistic route seems prudent given
the weak flow and stubborn low level inversion. We are also see an
area of flurries move through. They should clear kmsn by 14-15z
and the southeast tafs by 18z today.

Prev discussion (issued 241 am cst Wed jan 24 2018)
discussion...

today and tonight... Forecast confidence is medium.

Overall, a pretty quiet period. The forecast challenge is mainly
on some less impactful details. The low clouds in place look like
they may get stuck. Clearing has more or less halted in the weak
flow within the surface ridge moving through. The low level
inversion is rather strong and persistent as well. I'll back off
on the clearing and if it does decide to turn more sunny, well
then it's a bonus. A mid level short wave will roll across the
area this morning. It looks like we could get a subtle seeder-
feeder process going resulting in a few flurries for a few hours.

Seeder-feeder is when ice crystals fall from a higher cloud deck,
in this case from the mid level saturation with the wave, to the
lower cloud deck, resulting in snowflakes. We're just looking at
flurries and no accumulation. The increased cloud cover will also
keep temps a few degrees colder.

Skies should remain mostly cloudy tonight.

Thursday and Friday - confidence... Medium
a warming trend this period will be tempered somewhat by the
deeper snowpack across parts of southeast wi. Per coord with klot
have trended some temps down a bit across this deeper snowfield
in the southeast, ESP on Thursday. Mixing will be limited
Thursday but will be more pronounced Friday as a gusty
south southwest wind ramps up.

Friday night through Sunday night - confidence... Medium
a weak cold front moves through Friday night but a stronger one
arrives either Saturday night (gfs) or Sunday (ecmwf). The ecmwf
has trended towards the quicker and drier look of the GFS with
respect to this frontal precip staying to our southeast so will
ride with the dry blended pops. The ECMWF is the outlier with a
stronger wave in the northwest flow for Sunday. GFS is much weaker
and drier. Blended pops favoring the latter with the gem also on
board with the dry look.

Monday and Tuesday - confidence... Medium
there is decent consensus of a fairly pronounced low level
thermal trough settling in for Monday. However this is proggd to
be short lived as a renewed southerly return flow sets up for
Tuesday.

Aviation(06z tafs)... There is a lot of uncertainty with the low
cloud trends during the TAF period. Clearing looks to have slowed
or halted and i'm now more pessimistic about improving conditions.

Winds are weak within the surface ridge moving through, so there
isn't much to help these clouds clear out. Therefore, it looks
like we will stay MVFR through the afternoon across the southeast,
possibly clearing out toward kmsn by mid afternoon. Eventually,
everyone will beVFR tonight. We could see a few flurries from
these low clouds this morning, but no accumulation is expected.

Marine... Small craft advisory conditions are expected Friday into
Friday night due to southerly winds ahead of an approaching area of
low pressure that will track north of lake superior.

Mkx watches warnings advisories
Wi... None.

Lm... None.

Update... Davis
today tonight and aviation marine... Davis
Thursday through Tuesday... Collar


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
KNSW3 - Kenosha, WI 5 mi44 min WNW 6 G 8.9 26°F 1022.4 hPa (+0.4)
WHRI2 - Waukegan Harbor, IL 11 mi64 min WNW 8 G 9.9 26°F
MLWW3 - Milwaukee, WI 36 mi34 min N 11 G 13 25°F
FSTI2 39 mi104 min WNW 9.9 27°F
OKSI2 44 mi104 min N 2.9 29°F
CHII2 - Chicago, IL 44 mi24 min WNW 8.9 G 9.9 28°F 23°F
CNII2 47 mi29 min WNW 5.1 G 9.9 28°F 20°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
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
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
W9
G12
NW6
G9
W11
G16
NW7
G12
NW11
G16
W10
G15
W11
G17
W7
G12
W8
G11
NW7
NW8
G13
NW8
G16
NW8
G12
NW7
G13
NW5
G10
W5
G9
W5
G9
NW5
G8
W7
NW6
SW4
W4
G7
W5
W7
1 day
ago
N4
NE4
S11
G17
S10
G21
S16
G27
S13
G25
S13
G23
S17
G28
S13
G21
S13
G21
S12
G22
S8
G13
S7
G11
SE9
G14
SW11
G20
SW10
G16
SW6
G11
SW10
G13
SW6
G9
SW6
G10
SW7
SW10
G14
SW8
G11
SW6
G11
2 days
ago
S4
S4
G7
S5
G9
S6
S4
SE2
NE2
NE2
NE3
N2
NE2
NE3
NE2
E6
SE3
S4
S6
SE5
G10
SE2
SE3
E6
SE2
SE4
G7
SE4
G7

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kenosha, Kenosha Regional Airport, WI7 mi51 minWNW 610.00 miOvercast26°F21°F81%1023.2 hPa
Chicago/Waukegan Regional Airport, IL7 mi49 minW 39.00 miOvercast26°F23°F88%1023.8 hPa
Racine, Batten International Airport, WI17 mi51 minNNE 510.00 miOvercast26°F23°F88%1023.7 hPa

Wind History from ENW (wind in knots)
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
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrNW11NW8NW7
G16
NW13
G21
NW10NW10NW9
G20
NW11NW11NW10NW10NW8NW8NW7W7W6W6W6W5CalmW5W5W4W6
1 day agoNE10E11E9E5SE6S7S11S10
G17
S10S10SW7E4NE9NE8S7S7W12
G22
NW10
G20
NW7SW7W5W9NW7NW7
2 days agoS3S5S3CalmE3CalmNE4CalmNE6E5E5E5NE4E6E7E7E5NE8NE9NE8NE7NE7NE8E7

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 Milwaukee/Sullivan, WI (6,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Milwaukee, WI
   (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.