Thursday, July20, 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 5:53AMSunset 9:07PM Thursday July 20, 2017 8:33 PM MDT (02:33 UTC) Moonrise 2:15AMMoonset 5:29PM Illumination 7% Phase: Waning Crescent; Moon at 27 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 210137
afdbyz
area forecast discussion... Updated
national weather service billings mt
737 pm mdt Thu jul 20 2017

Update
Cancelled the severe thunderstorm watch #425 for southeast
montana. Strongest convection ended up just east of the state
line, in the dakotas. Weaker convection still ongoing, but not
working with as much instability. Coordinated with SPC and decided
to drop the watch. No changes to fire weather and existing red
flag warnings, given temperatures were still up, dewpoints still
down and wind was still a little gusty. Will update again in the
next couple of hours. Twh

Short term Valid for Fri and sat...

convection has been forming off the beartooth mountains and have
already begun pushing into big horn county as of 230 pm. This has
been the trend that the cams have been advertising. Meso-analysis
shows that CAPE values along the dakota borders are getting to
around 2000 j kg, and shear values are 40 to 50 knots through 6
km. Recent runs of the hrrr are still pointing towards stronger
convection developing later this afternoon in eastern montana then
moving into the dakotas. The convection currently in big horn
county will increase as it moves into the better environment.

A cold front will move through overnight and should be to around
miles city by 6 am tomorrow. This has will keep winds breezy
across musselshell, treasure, and northern rosebud counties.

Tomorrow 850mb winds remain strong out of the northwest. With
mixing tomorrow afternoon, areas from roundup to broadus are
going to gusty winds with relative humidity values in the teens.

Have extended the current red flag to until 9 pm tomorrow for
musselshell and northern rosebud, and have added custer, the rest
of rosebud, and powder river counties. Saturday will be dry, as
ridging builds back into the area. Reimer

Long term Valid for sun... Mon... Tue... Wed... Thu...

no significant changes. The riding continues Sunday and most of
Monday keeping conditions dry. A low in southern canada will bring
a weak cold front across the area. This will shift the ridge to
the east. This put the area in southwesterly flow. This will
result in some scattered pops each afternoon. The GFS ensemble is
not showing much in the line of moisture with any of this
activity. With the increase flow of monsoonal moisture,
temperatures will be slightly cooler. Reimer

Aviation
Thunderstorms will move across southeast montana and northern
wyoming this evening impacting kbhk and kshr. Otherwise gusty
outflow winds will move through the region producing gusts to 35
mph. Otherwise mostly clear skies expected withVFR conditions.

Borsum twh

Preliminary point temp pops
Fri Sat Sun Mon Tue Wed thu
-----------------------------------------------------------
bil 064 090 059 090 061 095 065 095 065 092 066 090 065 092
20 u 00 u 00 u 11 u 21 b 22 t 11 u
lvm 054 086 049 088 051 092 056 093 056 089 058 087 055 089
00 u 00 u 00 u 01 u 21 b 22 t 22 t
hdn 064 091 058 092 058 097 062 098 063 095 064 092 062 095
20 u 00 u 00 u 11 u 11 b 22 t 22 t
mls 070 091 060 091 062 096 068 099 067 094 067 093 066 095
20 u 00 u 00 u 01 u 11 b 12 t 21 u
4bq 067 090 059 091 060 094 066 098 066 095 065 091 064 093
30 u 00 u 00 u 01 u 11 b 12 t 22 t
bhk 068 091 056 089 056 091 063 096 062 092 062 089 061 091
41 u 00 u 00 u 01 u 11 b 12 t 22 t
shr 062 086 054 089 054 093 058 095 058 092 059 090 058 090
30 u 00 u 00 u 11 u 11 b 22 t 22 t

Byz watches warnings advisories
Mt... Red flag warning in effect until 9 pm mdt Friday for zones
117-127-130.

Red flag warning in effect until 9 pm mdt this evening for
zone 124.

Red flag warning in effect from 9 am to 9 pm mdt Friday for
zones 131-132.

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 minW 1010.00 miFair93°F26°F9%1011.5 hPa

Wind History from BZN (wind in knots)
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Last 24hrSE463CalmW5CalmSE5S7S8S6SE6SE3CalmCalmCalmN3N8NE4NE6----SW12
G25
W10N12
G19
1 day agoE3CalmNW6SW8SW6SE4SW8SE6SW3SE8S8S7S11S6N5CalmCalmNE6NW7NE8NE6N7N5SE4
2 days agoSW6Calm3S8SW8S7S10SE7CalmSE6N3SW4S3CalmNE5CalmCalmSE3N7
G14
N4N5E4NE3N6

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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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.