Tuesday, June19, 2018 L-36.com

Marine Weather and Tides
Bozeman, 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 5:32AMSunset 9:18PM Tuesday June 19, 2018 8:15 AM MDT (14:15 UTC) Moonrise 11:31AMMoonset 12:16AM Illumination 36% 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 Bozeman, MT
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location: 45.71, -110.99     debug

Area Discussion for - Billings, MT
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Fxus65 kbyz 190914
area forecast discussion
national weather service billings mt
314 am mdt Tue jun 19 2018

Short term Valid for tdy and wed...

situation looks a little different today compared to the last few
days. The deep upper low that was sitting over eastern oregon,
has now shifted into southwest montana. A northern rotation of the
low can be seen on water vapor imagery and radar data over
central montana, with a secondary low over northeast idaho. The
consensus is far the northern low to be the dominant one and
slowly fill as it sits over central montana today.

This system is a cold core and therefore, will have some
instability with it due to cold temperatures aloft. Expect showers
and thundestorms to develop all around the low today. Pin
pointing where most of the activity will be difficult given the
position of the low, amount of deep moisture available and our
terrain, but models seem to put scattered pops everywhere today,
with an emphasis on the western zones and the far eastern zones.

Focus for heaviest rainfall shifts into the eastern zones with
pwats over an inch there. Western and central zones still have
three quarters of an inch of pwat, so heavy rain likely there too,
but the deep moisture has slid into eastern montana. The GFS was
very aggressive in developing convection over the far east today,
with high QPF values. Decided to issue a flood watch for carter
county to catch this potential. Also, will extend the existing
flood watch through the day today. Morning rainfall was adding to
the musselshell basin over wheatland and golden valley counties
this morning. Streams and rivers were still responding to recent
rainfall over western zones, and with the potential for heavy rain
again this afternoon, thought it was a good idea to extend it
through the afternoon as we see how this whole event translates

The upper low continues to fill tonight and splits into eastern
and western sections. Wednesday does not look quite as active over
western zones as pwats dry out a bit and strongest forcing pushes
east. Will need to keep scattered pops going for the entire area
through, with cold air aloft, cyclonic flow and adequate moisture
around. A drying trend should be experienced Wednesday night.

Some odds and ends to discuss: patchy fog has formed over central
and eastern zones overnight. The fog has been briefly dense in
spots. Have lingered patchy fog through the morning hours. The gfs
was hitting mountains hard late this afternoon and tonight with
qpf. This would be snow above 9 thousand feet and may impact the
beartooth highway. The GFS was hitting this area hard as it was
keying off MUCAPE over the higher terrain. Will brief the day crew
to take a closer look at this, as may need another advisory for
snowfall for the beartooth highway tonight. Twh

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

the unsettled weather pattern looks to continue through the long
term. Most of Thursday looks to be dry with shortwave ridging
over the area. The dry period of weather is short-lived however,
as models prog a shortwave and associated cold front to move
through the area during the evening and overnight hours Thursday
producing showers and thunderstorms. Some of the thunderstorms
could be strong to severe with modest instability and shear over
the area. Periods of showers and thunderstorms then look to
continue Friday and through the weekend with cyclonic flow over
the area, and yet another shortwave progged to move into the
region from the pac NW Saturday into Sunday. Drier conditions then
look possible for early next week as ridging builds back over the
northern rockies.

High temperatures will range from the 70s to lower 80s most days
through the long term with low temperatures in the upper 40s to
50s. Stp

MVFR to lifr conditions are possible early this morning due to low
cigs and pockets of fog. Showers over western areas this morning
will increase in coverage with showers and thunderstorms possible
this afternoon and evening across the area. Local MVFR conditions
are possible with the showers thunderstorms. Mountain obscurations
are likely today. Stp

Preliminary point temp pops
Tdy Wed Thu Fri Sat Sun mon
bil 068 052 070 053 081 057 075 056 075 054 074 056 080
5 t 65 t 21 u 44 t 23 t 54 t 11 u
lvm 063 046 069 049 080 050 073 049 071 048 071 048 078
6 t 64 t 22 t 64 t 25 t 53 t 10 u
hdn 071 053 071 052 082 056 077 055 078 053 074 054 081
5 t 75 t 21 u 35 t 32 t 65 t 20 b
mls 070 056 073 055 080 059 078 059 079 058 077 058 080
5 t 76 t 21 b 33 t 42 t 44 t 21 b
4bq 069 054 071 053 079 057 077 057 078 055 074 057 078
6 t 76 t 21 b 24 t 42 t 65 t 32 w
bhk 069 053 073 053 078 055 078 056 078 055 075 055 077
5 t 65 t 21 b 24 t 33 t 35 t 22 t
shr 068 050 068 048 078 054 074 052 075 052 072 051 077
7 t 65 t 21 u 24 t 33 t 54 t 21 b

Byz watches warnings advisories
Mt... Flood watch in effect through this afternoon for zones

Flood watch in effect from noon mdt today through Wednesday
evening for zone 37.

Wy... None.

Weather.Gov billings

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bozeman, Gallatin Field, MT10 mi79 minN 010.00 miLight Rain52°F50°F93%1017.1 hPa

Wind History from BZN (wind in knots)
Last 24hrNW5N3Calm3W7NW7CalmCalmE6NE6NW4W5W8S3CalmS4S3N3CalmCalmCalmCalmCalmSE3
1 day agoW6W6W9W8E8NW4E8CalmE3NE4W8NE6E10
2 days agoW4E11SE9SE8SW56N10NW6NW10N8NW10NW10NW6W4W7S3SW6S3W4CalmW4CalmW4NW4

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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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.
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Wind Forecast for Billings, MT (10,2,3,4)
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Ground Weather Radar Station Billings, MT
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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.