Monday, January22, 2018 L-36.com


Marine Weather and Tides
Park City, MT

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 7:43AMSunset 5:08PM Monday January 22, 2018 8:45 PM MST (03:45 UTC) Moonrise 10:43AMMoonset 11:02PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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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7 Day Forecast for Marine Location Near Park City, MT
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location: 45.83, -109     debug


Area Discussion for - Billings, MT
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Fxus65 kbyz 230152
afdbyz
area forecast discussion... Updated
national weather service billings mt
652 pm mst Mon jan 22 2018

Update
Weak disturbance moving through the region has been generating
snow showers over the mountains and foothills this evening. Hi-res
models continue to indicate some weak showers moving across
portions of southeast mt later this evening as well. Have
increased pops over the mountains and updated sky cover to account
for current trends. An inch or two of snow is not out of the
question for portions of the beartooth absaroka and bighorn
mountains overnight. Otherwise, the rest of the forecast remains
on track and the previous forecast discussion and an updated
aviation discussion are below. Stp

Short term Valid for Tue and wed...

quiet conditions expected for most of the region tonight. A weak
disturbance moving overhead will produce light rain snow over our
western mountains and foothills, and in southeast portions of
montana and northeast portions of wyoming this afternoon and
tonight. The winds in our mountain foothills in
livingston big timber nye will remain breezy overnight but peak
gusts will only be around 35 mph.

A ridge of high pressure will build back into the region Tuesday
and a lee-side trough will re-develop along the mountain
foothills overnight. This will bring another round of wind to the
mountain foothill locations like nye, livingston, and big timber
with 50 to 60 mph gusts possible into Wednesday morning. A
disturbance will approach western montana early Thursday morning
but strong mid-level flow from the southwest combined with a
stubborn lee-side trough will keep the winds elevated through
much of the day Wednesday.

As precipitation and temperatures, outside of the precipitation
chances for tonight mentioned earlier, conditions will remain dry
through Thursday. Cool start to the short term period on
Wednesday with temperatures in the mid 30s. As the ridge of high
pressure builds in expect temperatures to climb into the upper 30s
and low 40s on Wednesday afternoon. Dobbs

Long term Valid for thu... Fri... Sat... Sun... Mon...

a progressive flow with no large systems or cold air in sight
continues for the extended period. Models disagreed in a lot of
the details of the pattern, so had to used blends through much of
the forecast. The pattern was supportive of windy conditions,
mainly in the gap areas, through the period.

A pacific jet will travel through the base of an eastward moving
trough that will cross the region Thursday into Friday. The ecmwf
was slower with moving the trough eastward than the gfs. Jet
divergence and good q-vector convergence will affect the area on
Thursday into thu. Evening as moisture crosses the area with a
cold front. Model blends resulted in a chance of rain snow, mainly
w of kbil with high temperatures in the low to mid 40s. Chances
for snow move S through the area during thu. Night. Accumulations
looked minimal. Pops will be confined to over and near the
mountains on Friday through fri. Night. Highs will reach the 30s
on Friday.

Both models build a ridge into the area Saturday through sat.

Night, but the GFS had more energy and moisture moving through the
flow than the ecmwf. Kept pops over and near the western mountains
for now, and highs in the 20s and 30s. Upper ridging or zonal flow
will be over the area through Monday, then both models bring the
next piece of pacific energy into the pacific NW for Monday night.

Had pops over and near the western mountains on Sunday. Spread
pops off the mountains sun. Evening. There was much uncertainty
for this period. Monday looked dry with highs in the 40s. Arthur

Aviation
Scattered snow showers and frequent obscurations will impact the
mountains tonight. Lower elevations will see isolated showers and
vfr flight conditions. Tuesday will be dry withVFR across the
forecast area. Gusts of 25-35 kts will impact klvm. Jkl

Preliminary point temp pops
Tue Wed Thu Fri Sat Sun mon
-----------------------------------------------------------
bil 021 036 021 043 028 043 023 035 018 035 020 036 026 045
10 u 01 b 02 r 21 b 11 b 11 b 11 e
lvm 020 037 027 045 028 042 018 033 018 035 024 042 028 046
30 N 11 N 04 o 33 S 21 N 22 o 21 n
hdn 018 035 013 042 021 042 019 035 015 033 014 036 018 042
20 u 01 b 01 b 31 b 11 b 11 b 10 b
mls 015 031 010 035 018 037 021 032 013 027 009 028 015 035
10 u 00 b 01 b 11 b 11 b 11 b 11 b
4bq 019 034 015 042 023 042 024 035 018 032 016 034 021 041
20 u 00 b 00 b 11 b 11 b 11 b 11 b
bhk 015 031 012 039 021 042 022 034 013 028 009 031 016 038
10 b 01 b 00 b 11 b 11 b 11 b 11 b
shr 017 034 014 043 023 042 019 033 013 032 015 037 022 042
20 u 00 b 01 b 32 S 11 b 11 b 10 b

Byz watches warnings advisories
Mt... None.

Wy... None.

Weather.Gov billings


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Billings, Billings Logan International Airport, MT25 mi52 minWSW 1210.00 miMostly Cloudy31°F19°F61%1022.2 hPa

Wind History from BIL (wind in knots)
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Last 24hrSW13W14SW11SW10SW11SW9W11SW8W10SW12SW16W19SW16SW15SW18SW12SW12SW11SW12SW11SW12SW13SW14SW12
1 day agoSW8SW9SW9SW9SW9SW12SW10SW11SW8SW9SW12SW10SW11SW14SW12SW11SW12SW12SW12SW9SW5S4W9W12
2 days agoSW6SW8SW8SW84SW6SW5SW8SW8NW6NW8SW5W6W10NW9
G18
SW13NW10W11W11W4W9W12W9SW8

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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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of NorthernPlains    EDIT
Geos

Wind Forecast for Billings, MT (22,6,7,8)
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Ground Weather Radar Station Billings, MT
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weather_mapweather_map weather_map

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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.