Sunday, January21, 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 7:12AMSunset 4:53PM Sunday January 21, 2018 6:50 AM CST (12:50 UTC) Moonrise 10:47AMMoonset 10:30PM Illumination 23% Phase: Waxing Crescent; Moon at 5 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 Sun Jan 21 2018
Today..South wind 5 knots becoming southeast late in the morning, then backing east early in the afternoon rising to 10 to 15 knots late in the afternoon. Widespread fog in the morning. Areas of fog in the afternoon. Chance of drizzle through the day. Waves around 1 foot.
Tonight..East wind 5 to 10 knots rising to 10 to 15 knots late in the evening, then becoming east 10 to 15 knots after midnight becoming east 10 to 15 knots with gusts to around 20 knots early in the morning. Widespread fog. Rain. Waves 1 to 2 feet.
Monday..East wind 10 to 20 knots veering southeast 15 to 20 knots in the late morning and early afternoon, then veering south 10 to 20 knots late in the afternoon. Gusts up to 25 knots. Areas of fog in the morning. Rain in the morning. Chance of Thunderstorms through the day. Rain likely in the afternoon. Waves 3 to 4 feet building to 3 to 5 feet.
Monday night..South wind 10 to 15 knots veering southwest with gusts to around 20 knots after midnight, then veering northwest 10 to 20 knots with gusts to around 25 knots early in the morning. Rain showers likely and slight chance of Thunderstorms through around midnight, then rain and snow showers after midnight. Waves 3 to 4 feet subsiding to 1 to 2 feet after midnight, then building to 2 to 4 feet early in the morning. Wave heights are for ice free areas.
LMZ646 Expires:201801211700;;770916 FZUS53 KMKX 211106 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 505 AM CST Sun Jan 21 2018 For waters within five nautical miles of shore on Lake Michigan LMZ646-211700-

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 211145
afdmkx
area forecast discussion
national weather service milwaukee sullivan wi
545 am cst Sun jan 21 2018

Update
Widespread fog has developed across the region, with some sites
falling to or below 1 4 mile across the central portion of the
cwa. Freezing fog has also been noted in a few spots, which isn't
unexpected. Some slick spots will be possible, especially on
bridges and overpasses.

Will continue to keep a close eye on obs over the next few hours,
and should fog become more widespread and or more dense, a dense
fog advisory may eventually be needed for portions of the area.

Aviation(12z tafs)
Flight conditions have fallen into the ifr range in most
locations, and should remain there today. Dips into lifr are
probable at times.

Later tonight, rain and drizzle will become more widespread, and
fog will continue. Most model guidance takes the region well into
lifr range, but confidence is low on how things will unfold. For
now, generally kept sites in the lower ranges of ifr, but further
updates to take things into lifr are possible.

The one exception at this point is kmke, with vis dropping to 1 2
sm this evening and tonight. The main concern at kmke will be fog
moving in off the lake as winds turn easterly. This could
potentially result in even lower flight conditions, so updates are
likely as the day GOES on.

Winds will remain light and variable into this afternoon, before
becoming easterly this evening and through the day Monday.

Prev discussion (issued 307 am cst Sun jan 21 2018)
short term...

today and tonight... Forecast confidence is medium...

challenging short term forecast at this hour, with the initial
focus being on fog freezing fog potential this morning. Stratus
has been slow to make its way north into the forecast area, and we
have seen some radiation fog develop where skies have remained
clear. As more abundant cloud cover moves in, fog may briefly
lift, but visibility is likely to eventually come back down as
stratus build-down takes place.

Short term temperatures are also a challenge, with the freezing
line currently situated from roughly mineral point to whitewater
to waukesha, and then on north to the port washington area. North
of this line, and dense fog that develops would have the
potential of depositing a thin layer of ice on untreated road
surfaces, leading to the potential for a few slick spots. Thus
far, most of the denser fog has been confined to areas above
freezing, but it's certainly plausible that we see some areas of
freezing fog develop before sunrise.

Temperatures will slowly rise through the day today, reaching the
mid 30s by this afternoon as better warm air advection takes hold.

This WAA will be associated with considerable low level moisture
advection as well, with stratus, fog and drizzle becoming more
widespread this morning and early afternoon, before eventually
transitioning to light rain showers late this afternoon into this
evening. By the time the more substantial precipitation moves in,
temperatures should generally be above freezing.

Rain will then become rather widespread and somewhat heavier
overnight tonight, and with model guidance suggesting several
hundred j kg of elevated cape, a few thunderstorms are possible
south of i-94 us 18.

Long term...

Monday through Tuesday... Forecast confidence is medium.

The center of the occluded surface low will track into southern wi
by late Monday afternoon. Widespread showers (and perhaps some
thunder from i-94 south) are expected through most of the day. As
the low moves into far south and southeast wi, expect showers to
diminish with the dry slot. More showers and storms are possible
along the occluded front in far southeast wi Monday evening. Total
rainfall with this system should be around an inch. Rivers are
low, but many are frozen, so this rain could help thaw them a
little. We will need to be on the lookout for ice jams.

Toward the dells, the temperature gradient and rain snow line
will be rather tight. I expect the snow to hold off for the mkx
forecast area until early evening.

Dry air wrapping into the mid levels of the system on the
northwest side of the low could cause a loss of ice crystals and
therefore a period of freezing drizzle (northwest of madison and
fond du lac) Monday night. We will change back over to snow as the
system slides east of the area. Snowfall amounts will still be
light with around an inch accumulation, perhaps up to 3 at the
most by Tuesday morning. That could lead to a slippery commute.

We could see some lingering flurries or light snow showers into
late Tue morning, but overall it looks like we'll dry out fairly
quickly on the back side of this system. Temps will dip into the
teens Tue night.

Wednesday through Friday... Forecast confidence is high.

There is a weak signal for a shortwave to bring some light snow to
portions of wi on wed, but no mention of it in the forecast yet.

Wed highs will only be in the 20s, but warmer air will spread back
in for later in the week. Highs by Friday should be in the 40s.

Next weekend... Forecast confidence is medium.

Another amplified upper trough crossing the country could bring
rain or perhaps a rain snow mix to southern wi Friday night into
Saturday. There may be light snow flurries on the back side that
could get us on Sunday. There is good agreement between the gfs,
ecmwf, and even the canadian models at this time.

Marine...

reduced visibilities are expected across the nearshore waters
through tonight, and it's possible that a dense fog advisory may
eventually be needed.

Light winds today will become easterly tonight, with waves
building into Monday morning. Small craft advisory is likely to be
needed from Monday into Wednesday, with initial high waves
associated with easterly winds tonight and Monday giving way to
gusty northwest winds early Tuesday morning. Gusts may approach
gale-force early Tuesday.

Mkx watches warnings advisories
Wi... None.

Lm... None.

Update... Boxell
today tonight and aviation marine... Boxell
Monday through Saturday... Cronce


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 mi51 min S 5.1 G 6 36°F 1014.9 hPa (-0.7)
WHRI2 - Waukegan Harbor, IL 11 mi71 min S 6 G 7 35°F
MLWW3 - Milwaukee, WI 36 mi41 min NE 4.1 G 4.1 35°F
FSTI2 39 mi111 min SW 14 41°F
OKSI2 44 mi111 min ENE 2.9 42°F
CHII2 - Chicago, IL 44 mi51 min S 9.9 G 9.9 40°F 38°F
CNII2 47 mi36 min S 6 G 8 40°F 36°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
SW9
G12
S8
G11
SW5
G9
SW10
G14
SW11
G16
SW8
G14
SW9
G13
S8
G12
S8
G12
S6
G11
S8
S6
G10
S6
G9
SW5
G8
SW9
G13
S5
S3
G6
S4
S5
S6
G9
S4
S5
S6
G9
SW3
1 day
ago
S12
G18
S12
G16
S12
G16
S13
G19
SW15
G19
SW15
G20
S16
G23
S17
G24
S16
G22
S19
G23
S16
G23
S15
G20
S16
G22
S17
G26
S16
G25
S18
G27
S16
G24
SW14
G24
SW15
G20
SW13
G21
SW11
G19
SW12
G17
SW8
G15
SW9
G15
2 days
ago
SW9
G13
SW8
G15
SW10
G14
SW13
G18
SW14
G22
SW11
G20
SW13
G20
S16
G20
SW13
G18
S17
G21
SW16
G21
S16
G21
SW13
G22
S13
G18
S13
G17
S14
G19
S12
SW13
G20
SW11
G17
SW13
G17
SW10
G16
SW12
G17
SW15
G19
SW13
G17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kenosha, Kenosha Regional Airport, WI7 mi58 minS 34.00 miFog/Mist38°F35°F89%1015.1 hPa
Chicago/Waukegan Regional Airport, IL7 mi56 minN 03.00 miFog/Mist38°F36°F93%1015.4 hPa
Racine, Batten International Airport, WI17 mi58 minS 33.00 miFog/Mist38°F35°F89%1015.6 hPa

Wind History from ENW (wind in knots)
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
6
AM
Last 24hrW6SW6W7W6W9W7SW6SW8SW5SW7SW5SW8SW5SW3S5SW5SW4SW4CalmS4S7S5S3S3
1 day agoSW8SW9SW13SW13
G22
SW12
G21
SW18
G24
SW13
G25
SW15
G25
SW14
G24
SW17
G25
SW14
G24
SW16
G26
SW18
G28
SW19
G33
SW18
G26
SW19
G30
SW18
G28
W19
G30
SW14
G22
SW11W9W14W10W7
2 days agoW14SW17SW15
G23
W12
G21
W19
G26
SW18
G26
SW18SW19
G26
W18
G26
SW16
G26
W16
G25
SW17
G25
SW14
G22
SW19
G29
SW17
G26
W22
G29
SW17
G26
SW12
G23
SW15SW16
G23
SW13SW11SW9SW8

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 (7,2,3,4)
      (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.