Friday, June22, 2018 L-36.com


Marine Weather and Tides
Big Sky, MT

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:33AMSunset 9:19PM Friday June 22, 2018 8:51 PM MDT (02:51 UTC) Moonrise 2:55PMMoonset 1:41AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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 Big Sky, MT
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location: 45.26, -111.31     debug


Area Discussion for - Great Falls, MT
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Fxus65 ktfx 230241
afdtfx
area forecast discussion
national weather service great falls mt
841 pm mdt Fri jun 22 2018

Synopsis
Disturbances in a west-northwest flow aloft will bring scattered
showers and thunderstorms to the region through Saturday. Some
storms on Saturday may produce brief heavy rain, which may add to
ongoing flooding problems in some areas. High pressure will then
bring drying and warming conditions for Sunday into Monday. Near
normal temperatures through Saturday will warm to at least 10
degrees above normal by Monday.

Discussion
Showers and thunderstorms continue over the hi-line this evening.

They should persist for several hours into the early morning time
period. Another system moving into southwest montana will bring
scattered showers across the southwest overnight. As the weather
system moves into central montana, scattered showers will develop
and move to the east overnight. Updates for increased chances of
precipitation across portions of the southwest, central and hi-
line regions. Db

Aviation
Updated 2317z.

MainlyVFR conditions are expected through the forecast period.

Showers and thunderstorms of late afternoon will gradually decrease
by sunset. ContinuedVFR conditions for overnight, although
some scattered shower activity is possible across the southwest.

Similar conditions will then be found for Saturday... With mainly
vfr conditions... Although scattered shower activity could bring
some brief MVFR.

Prev discussion
Issued 517 pm mdt Fri jun 22 2018
tonight through Sunday... Lingering moisture and daytime heating
could continue scattered thunderstorms this evening. There will be
very limited shear today... So the main threat from thunderstorms
will be localized heavy rain as pwat values remain high. Small hail
and some gusty winds are also possible. This activity diminishes
somewhat overnight. Another shortwave will then bring another
round of mainly afternoon and evening showers and thunderstorms on
Saturday. Models can't fully agree on Sunday. Some start to dry
things out while other linger scattered showers and thunderstorms
under unstable air. Will linger some chance pops to account for
the uncertainty. Temperatures will warm slightly for Saturday and
Sunday although remain near normal readings. Coulston anglin
Sunday night through Friday... High pressure aloft will then bring
a drying and warming period to the area, as temperatures warm to
at least 10 degrees above normal by Monday.A cold front will move
into the area either late Monday afternoon or Monday evening,
which could bring a round of scattered showers and thunderstorms.

The very warm temperatures on Monday will likely provide strong
instability, and the approaching passing cold front will combine
with strong winds aloft ahead of a deep upper level trough to
potentially create strong wind shear. Will therefore continue to
monitor the situation for possible strong to severe storms Monday
afternoon and evening. A broad and weak area of high pressure will
then keep the area dry into Thursday as temperatures hover near
normal. However, another low pressure trough will bring an
increasing chance for showers and thunderstorms once again
Thursday afternoon through Friday. Coulston

Preliminary point temps pops
Gtf 53 71 55 77 30 40 50 40
ctb 52 68 52 77 20 40 40 20
hln 53 70 53 77 20 40 40 30
bzn 49 67 48 72 30 50 40 40
wey 43 56 38 65 30 70 40 30
dln 48 64 45 71 30 40 30 20
hvr 56 76 56 80 50 60 60 40
lwt 51 68 51 71 30 40 50 50

Tfx watches warnings advisories
Numerous other flood warnings are in effect until further notice.

Http:

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bozeman, Gallatin Field, MT38 mi56 minS 310.00 miFair73°F46°F38%1009.6 hPa

Wind History from BZN (wind in knots)
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Last 24hrE4CalmS6CalmCalmSE4S5SE4SE6SE6SE4SE4Calm3CalmCalmW9NW7W8S8--W6SW7S3
1 day agoNE4SE5CalmSE5S9CalmE5CalmE10S10CalmCalm3E5N4N3NW9NW15W18
G27
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G24
E66N6E5
2 days agoCalmN3S3SW4CalmS3SE4S6S4SE3S3S3W5Calm333CalmE433N3NE5NE3

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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wmap_P
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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Great Falls, MT (22,6,7,8)
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Ground Weather Radar Station Billings, MT
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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.