Wednesday, May27, 2020
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Marine Weather and Tides
South Glastonbury, MT

Version 3.4 		NOTICE
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 5:38AMSunset 9:03PM Wednesday May 27, 2020 3:24 PM MDT (21:24 UTC) Moonrise 9:00AMMoonset 12:00AM Illumination 32% 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 South Glastonbury, MT
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location: 45.26, -111     debug

Area Discussion for - Billings, MT
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FXUS65 KBYZ 272021 AFDBYZ

Area Forecast Discussion National Weather Service Billings MT 221 PM MDT Wed May 27 2020

DISCUSSION. Tonight through Thursday night .

Satellite imagery shows an upper low over central Saskatchewan, cyclonic W-NW flow over our region, and a shortwave approaching from north central MT. There remains some showers in far southeast MT associated with a morning wave, and this activity will exit Carter county soon. Upstream wave will help to produce isolated showers this afternoon and evening, mainly over/near the mountains and NW-flow upslope areas, but otherwise there is not enough instability/moisture to do much. Later tonight, in the wake of the shortwave, there will be a period of mid level frontogenesis in a region of very modest elevated instability, which should be enough for isolated overnight showers mainly east of Billings.

Surface high settling over our east combined with building upper level ridge from the west will result in a period of east winds, capping and dry weather Thursday and Thursday night. Temps tomorrow will be a bit cooler than today per the poor mixing, despite the rising heights.

JKL

Friday through Tuesday .

An upper level ridge will move eastward over southeastern Montana allowing for temperatures to continue to warm into Sunday with possible records being broken.

Ensemble runs continue to keep Saturdays temps in the 80s. Models are coming into better agreement with convection Friday and Saturday afternoons. A slight chance of PoPs continues during this period as there is still uncertainty in the location of storms. There is moderate instability along with shear in the atmosphere that would allow for strong to severe storms to form mainly along the foothills and out towards Billings. Capping continues to be the big inhibitor in the atmosphere which could limit the formation of storms. Given we are still 4 days out, it is hard to forecast just how strong the capping will be. We will have to see how it plays out over the next few days and will make sure to update the forecast accordingly. High elevation snow melt will also cause rivers to rise early to mid next week. Rivers will have faster flows and increased bank erosion. Showers and thunderstorms are expected to continue into early next week.

Another element of this upper ridge will be the potential for near record heat on Sunday. The record high temperature for May 31 is 92F for the three stations Billings, Miles City and Sheridan.

High temps will warm into the 80s on Friday and Saturday. High temps will then warm again into the upper 80s to mid 90s on Sunday before cooling back into the 80s.

Carrothers

AVIATION.

VFR flight conditions will prevail through Thursday. Mountains may be occasionally obscured in isolated rain/snow showers. JKL

PRELIMINARY POINT TEMP/POPS.

Thu Fri Sat Sun Mon Tue Wed ----------------------------------------------------------- BIL 050/070 049/080 055/085 060/093 058/087 060/086 058/081 10/B 01/U 22/T 20/B 00/B 12/T 33/T LVM 046/070 047/083 054/084 056/086 053/085 054/081 053/079 00/U 02/T 22/T 21/B 01/B 24/T 45/T HDN 048/070 049/082 054/086 060/095 058/088 059/087 058/083 10/B 00/U 21/B 21/B 10/B 12/T 33/T MLS 048/070 047/077 052/080 059/091 060/088 061/087 060/084 20/B 00/B 00/U 11/B 20/U 12/T 33/T 4BQ 047/068 047/078 051/080 057/092 059/089 059/087 058/084 21/B 00/B 21/B 11/B 10/B 12/T 23/T BHK 045/068 043/072 049/074 052/081 057/087 058/085 057/082 10/U 00/B 10/B 01/N 20/U 12/T 33/T SHR 046/068 047/081 054/085 059/091 057/089 058/086 056/081 21/B 02/T 22/T 31/B 10/B 12/T 23/T

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, MT37 mi28 minN 510.00 miFair73°F41°F32%1015.7 hPa

Link to 5 minute data for KBZN

Wind History from BZN (wind in knots)
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Last 24hrW10
G17		N6W10W14
G19		W8NW6N8NW7NW6SW4W3SW3SE4S5S5SE4CalmCalmNE4N6CalmN83N5
1 day agoNE7E4E5SE6SE5NW7W11W10SW4E4N4E6CalmS5CalmCalmCalmS344CalmW63N4
2 days ago34NW3E4E4CalmSE6S5SE5S4CalmS5SE4S8SE5S6CalmCalmCalmCalm3NE653
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
Wind Forecast for Billings, MT (17,4,5,8)
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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 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.