Monday, December16, 2019
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Marine Weather and Tides
Silver Gate, MT

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:56AMSunset 4:42PM Monday December 16, 2019 12:21 AM MST (07:21 UTC) Moonrise 9:42PMMoonset 11:37AM Illumination 79% Phase: Waning Gibbous; Moon at 19 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 Silver Gate, MT
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location: 45.05, -110     debug


Area Discussion for - Billings, MT
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FXUS65 KBYZ 160228 AFDBYZ

Area Forecast Discussion . Updated National Weather Service Billings MT 728 PM MST Sun Dec 15 2019

UPDATE. Weak shortwave in cyclonic flow was developing a few snow showers across the forecast area earlier this evening. Models did not pick up on this activity at all, even the high resolution runs. Brushed in some low pops for the rest of the evening and timed them out of the area overnight. TWH

DISCUSSION.

Today through Tuesday Night .

Cyclonically curved northwest flow aloft over the region today will trend towards anticyclonic northerly flow through Monday which persists into Tuesday as an upper level ridge migrates eastward through the western US. Expect terrain assisted convection this afternoon to dissipate with the exception of western areas this evening where a disturbance clipping extreme southeast Montana will maintain some midlevel instability through the evening hours. Water vapor imagery shows drier low level air moving into the area as shown by dewpoints at KLVM approaching the single digits. This air will make its way from west to east overnight but in southeast Montana its arrival is later so still could see some stratus formation.

Monday looks dry across the area and at the surface pressure gradients increase along the foothills but leeside troughing is not strongly established. This begins to pick up the winds in western areas but may not bring as much winds to central zones. Because pressure gradients are oriented from NNW to SSE to not expect significant gap flow winds and winds will likely be just as strong in Harlowton area as Big Timber and Livingston given a bit of support from stronger 700mb winds oriented northwesterly. This changes Monday night as IDA-LWT gradients projected to tighten to 20mb which is maintained into Tuesday night. Expect gap flow winds to become strong sometime Monday night but right entrance region of the jet over the area in the evening my delay its intensification until midnight. However from Monday night through Tuesday and persisting off an on through the week gap flow winds will be a persistent story.

Otherwise dry weather expected the next two days with the winds causing better mixing and warming temperatures. borsum

Wednesday through Sunday .

Extended forecast continues to trend dry, warmer, and windy. Any precipitation chances will remain over southwest mountain locations, and those chances will be low. Western foothills will likely have wind gusts in the 50 to 60 mph range Wednesday morning and Thursday night into Saturday. Temperatures will approach 50 degrees in some areas Friday, Saturday and Sunday. Far extended continues to trend cooler, but no signs of Arctic air coming to Montana yet. Chambers/RMS

AVIATION.

VFR will prevail tonight through Monday evening. Some fog is possible in the KMLS area late tonight. Localized to areas of mountain obscuration will decrease overnight. Expect gusty WSW winds in KLVM after 06Z tonight with gusts of 30-35 kt. The winds will become stronger Monday evening. LLWS will occur in KBIL tonight. Arthur

PRELIMINARY POINT TEMP/POPS.

Mon Tue Wed Thu Fri Sat Sun ----------------------------------------------------------- BIL 019/036 021/041 026/045 026/045 029/049 033/052 032/050 20/U 00/N 00/N 00/B 00/B 00/B 11/B LVM 018/031 017/036 022/042 023/039 028/045 033/048 033/046 20/N 00/N 00/N 00/N 11/N 11/N 12/S HDN 014/034 015/040 019/043 020/044 022/048 027/051 026/049 20/U 00/U 00/U 00/B 00/B 00/B 11/B MLS 013/030 017/037 022/040 020/039 023/044 027/046 027/043 20/U 00/B 00/U 00/B 00/B 00/B 00/B 4BQ 012/031 014/037 018/042 018/041 021/044 025/048 026/046 20/U 00/U 00/U 00/B 00/B 00/B 00/B BHK 010/027 014/033 019/038 017/037 020/042 025/044 025/041 20/U 00/B 00/U 00/B 00/B 00/B 00/B SHR 010/032 010/040 017/045 019/043 020/047 025/051 028/049 20/U 00/B 00/U 00/B 00/B 00/B 01/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
Yellowstone Lake, WY41 mi86 minN 0 mi-5°F-8°F87%1024 hPa

Link to 5 minute data for KP60

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Last 24hrCalmCalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalm64W8W3W3W5W54CalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmNW3CalmNW3NW3CalmCalm54----W34CalmCalmCalmCalmNW3CalmCalm
2 days agoW7
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Billings, MT (2,6,7,8)
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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.