Wednesday, January20, 2021
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Marine Weather and Tides
Gardiner, MT

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:55AMSunset 5:15PM Wednesday January 20, 2021 1:01 PM MST (20:01 UTC) Moonrise 11:48AMMoonset 12:20AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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 Gardiner, MT
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location: 45.05, -110.74     debug


Area Discussion for - Billings, MT
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FXUS65 KBYZ 201055 AFDBYZ

Area Forecast Discussion National Weather Service Billings MT 355 AM MST Wed Jan 20 2021

DISCUSSION.

Today through Thursday night .

Lee-side troughing remains in place this morning resulting in tight pressure gradients along the Beartooth Foothills, as well as areas from Big Timber to Harlowton. However, the gradient is just starting to weaken somewhat as a surface low moves across southern Canada. Most of the higher wind gusts occurred last evening but we have had a few gusts around 60 mph earlier this morning. The latest observations still show gusts in the 50s. Pressure rises across north central Montana will help slacken the gradient as the morning progresses but we can't rule out an occasional high gust as the front moves across these areas. As a result, we will continue with the wind advisory and high wind warnings, but these will most likely get cancelled early.

Some changes in the models for Thursday compared to yesterday in that they bring a chance for snow into the western half of the forecast area during the afternoon and continue into Thursday night. A backdoor front ushers in come colder air from the north/northeast during the day. At the same time, a weak Pacific disturbance will bring some moisture aloft overrunning this airmass. As a result, I added likely pops to the Beartooth/Absaroka Mountains with high chances along the foothills and a slight chance as far east as Yellowstone County Thursday afternoon and night. At this time, this is not much of an impactful event but a few inches of snow look likely for the mountains with 1 or 2 inches possible for the foothills locations and lesser amounts further east.

Highs today will be in the 40s before temperatures begin a downward trend Thursday into the weekend. Hooley

Friday through Tuesday .

A split trough is progged to work through the area Friday and Saturday. This will assure colder temperatures and keep the chance of some accumulating snow in the forecast early this weekend. Downslope mid level flow kicks back in for Sunday and Monday. Early next week the uncertainty is tremendous, as the models battle between establishing a cold upper trough over the northern Rockies, or building a warming ridge in from the west. The adjustments made were mainly to the early part of the extended based on the great uncertainty for the later.

Snow will be lingering Friday morning along the foothills and locations south of Billings mainly, but will keep PoPs in for most locations. A surface low scooting into the plains will take over running snow from Thursday night south and east of the area by Friday night. Overall feel of Friday does not look quite as cold as what had been previously advertised, with limited snowfall.

The splitting trough will work through the area on Saturday. Moisture will be limited as most will be caught up in the southern part of the split to the south, but will linger at least a chance of light snow with decent cyclonic flow and cold air over us. The differences in model solutions have been consistent for a while, with the GFS having a little more snow than the ECMWF. Even should the GFS be right, snow amounts will be an inch or less.

Models kick downslope mid level winds in for Sunday with some sort of ridging. From there it is difficult to say, as the GFS brings a weakening upper trough into the northern Rockies then dissolves it fairly quickly with building heights for Tuesday and Wednesday. The ECMWF, on the other hand, develops a fairly deep upper trough over the Great Basin through Wednesday. Time should be able to resolve these discrepencies. TWH

AVIATION.

VFR conditions can be expected through the period with passing high clouds. Gusty southwest to west winds will continue along the western foothills this morning, with gusts in excess of 50 kts from KLVM to K6S0 and K3HT. Breezy conditions can be expected east onto the plains as well, with gusts 30-35kts at KBIL and KMLS. Winds and clouds will decrease late this afternoon. TWH

PRELIMINARY POINT TEMP/POPS.

Tdy Thu Fri Sat Sun Mon Tue ------------------------------------------------------- BIL 047 027/036 022/029 019/029 016/035 017/032 016/028 0/N 03/S 32/S 32/S 00/U 01/B 12/S LVM 043 026/035 023/027 017/027 012/032 016/029 016/026 0/N 04/S 52/S 22/S 00/N 01/B 12/S HDN 048 023/038 019/032 016/030 011/035 013/034 012/029 0/B 00/E 22/S 33/S 00/U 00/B 12/S MLS 043 020/033 013/028 013/029 010/033 011/031 011/028 0/N 00/U 01/B 21/E 00/B 00/B 12/S 4BQ 043 021/034 017/030 016/028 012/034 013/032 012/031 0/B 00/U 00/B 22/S 00/U 00/B 12/S BHK 040 016/030 008/026 010/026 007/031 008/028 006/024 0/N 00/U 00/B 21/E 00/U 00/B 12/S SHR 044 017/034 014/030 013/027 007/033 009/032 008/028 0/B 01/B 22/S 34/S 10/U 00/B 12/S

BYZ WATCHES/WARNINGS/ADVISORIES. MT . High Wind Warning in effect until 6 PM MST this evening FOR ZONES 63-141-172-228. Wind Advisory in effect until 6 PM MST this evening FOR ZONES 65-66. WY . None.

weather.gov/billings


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KWYS

Wind History from WYS (wind in knots)
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1 day agoCalmCalmCalmCalmNE5CalmCalmSW8S10S13S13CalmSW14S9
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2 days agoSW7SW5SW6SW11SW9SW13S10S17S11
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S11S15S14SW10CalmE3S5CalmCalmCalm--CalmCalmCalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station




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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 numerous 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.