Tuesday, June27, 2017 L-36.com


Marine Weather and Tides
Bozeman, 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 5:35AMSunset 9:19PM Tuesday June 27, 2017 11:33 AM MDT (17:33 UTC) Moonrise 8:54AMMoonset 11:04PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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 271546
afdbyz
area forecast discussion... Updated
national weather service billings mt
946 am mdt Tue jun 27 2017

Update
Showers with isolated thunderstorms have moved out of southwest
montana and into the beartooth absaroka mountains. These will
continue to move east this morning. Tweaked pops some based on the
radar. Tweaked the humidity a little overnight. High-res models
still show more develop this afternoon after this first wave moves
out. Reimer

Short term Valid for tdy and wed...

active weather day expected with intensity the biggest question as
a disturbance will move through the area with the ridge axis
already moving out of montana. Core of this disturbance over
southwest idaho and it fills a bit as it approaches the western
zones this morning. Most of the forecast area has seen a cold
front pass through overnight though front likely to be hung up
over carter and fallon counties into the morning hours. Main jet
is passing south of the area so strongest lift moves across
wyoming and that is where strongest thunderstorm activity will be
expected. Expect multiple rounds of storms today with one set
having a relatively early timing today. The early storms will be
fighting lower CAPE and initial dryness in the atmosphere but
they do help moisten the atmosphere for later storms. Models show
pws increasing through the day so despite relatively weak shear
afternoon storms could produce small hail and gusty winds. This
lines up with marginal risk posted by SPC along the montana
wyoming border. Temperatures will be cooler today by 7-10 degrees
with southeast montana still seeing a few upper 80s.

A bit of shortwave ridging overnight lowers chances for
thunderstorm activity but Wednesday sees cyclonic develop as
another wave slides southward through alberta. Airmass is slightly
drier and the boundary layer is cooler so while instability will
support thunderstorm development expect storms to be less numerous
and not as wet. Flow becomes even more cyclonic Wednesday night
as the wave begins to swing through southern saskatchewan which
pushes a cold front through the area. This supports nocturnal
shower and thunderstorm activity but drying behind the front will
continue the trend of storms being less wet. Borsum

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

didn't make any significant changes to the going extended
forecast. Continued isolated to scattered pops for Thursday with
cyclonic flow over the area and vorticity moving through the flow.

Airmass dries out thu. Night and Friday for minimal pops. Did keep
the western pops on Friday as GFS continued to show vorticity
streaming through this area. The GEFS plumes for thu. Were in the
60s and 70s, and blended guidance gave highs a bit below normal
which looked good. Friday will have similar highs to Thursday.

More vorticity approaches the west on Saturday for chances of
afternoon and evening thunderstorms W of kbil. There will be a low
chance of thunderstorms over the eastern zones sun. Afternoon as
the energy moves through this area. Sat. And sun. Will be warmer
with highs in the 80s. Upper ridging and drier air will bring dry
and warmer conditions Monday and Tuesday. Went a couple of degrees
above blended guidance to get highs around 90 based on 700 mb
temperatures around +14 degrees c. Arthur

Aviation
Scattered showers over the absarokas will push eastward impacting
bil around 17 18z. Thunderstorm impacts continue this afternoon
and early evening at all sites as scattered thunderstorms develop
behind a cold front moving across the region. Mountain
obscurations likely through the period. Walsh

Preliminary point temp pops
Tdy Wed Thu Fri Sat Sun mon
-------------------------------------------------------
bil 081 056 078 055 075 052 077 053 082 057 086 061 091
5 t 42 t 23 t 11 b 11 u 11 u 00 u
lvm 074 049 074 046 072 043 076 045 080 049 083 051 087
6 t 33 t 33 t 11 b 12 t 21 u 11 u
hdn 083 054 082 053 076 051 079 052 084 056 089 060 093
5 t 43 t 32 t 11 b 11 u 11 u 00 u
mls 084 053 083 055 078 049 077 050 083 057 088 063 093
4 t 32 t 32 t 11 b 11 u 11 b 10 u
4bq 085 053 081 054 076 050 077 050 082 056 086 061 091
4 t 43 t 43 t 11 b 11 u 12 t 10 u
bhk 087 051 081 053 075 047 072 046 079 052 083 058 088
3 t 31 u 23 t 21 b 11 u 12 t 10 u
shr 078 053 076 050 072 047 075 048 080 053 083 055 089
5 t 54 t 43 t 12 t 11 u 11 b 11 u

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
Bozeman, Gallatin Field, MT10 mi98 minN 010.00 miFair67°F48°F51%1008.7 hPa

Wind History from BZN (wind in knots)
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Last 24hrCalmNW5N63SW10W12
G19
NW94S12SE7NE7W16
G28
W7S10NW5CalmS8SE5NE5W3S8E5CalmW6
1 day ago54CalmN6--NW6CalmE3E4E4SE7SE4CalmSW3S3SW6SE3S6NE3SE3NE4Calm33
2 days ago3NW3N75N6NW6N5N5N3CalmE6CalmN5NW5NW10CalmNE5E3SW3CalmW34N5Calm

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
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IR Satellite Image from GEOS
west_satellite

GOES Local Image of NorthernPlains    EDIT
Geos

Wind Forecast for Billings, MT (13,3,4,5)
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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.