Friday, December4, 2020
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Marine Weather and Tides
South Hills, 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 7:54AMSunset 4:43PM Friday December 4, 2020 4:20 PM MST (23:20 UTC) Moonrise 8:35PMMoonset 11:43AM Illumination 77% Phase: Waning Gibbous; Moon at 20 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 Hills, MT
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location: 46.57, -112.02     debug


Area Discussion for - Great Falls, MT
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FXUS65 KTFX 042102 AFDTFX

Area Forecast Discussion National Weather Service Great Falls MT 202 PM MST Fri Dec 4 2020

SYNOPSIS.

High pressure centered across the Northern Rockies and Montana will maintain mostly clear, dry and mild conditions across the region through the weekend. Cloud-cover and winds will increase early next week with unseasonably mild temperatures continuing before A transition to more seasonable conditions is expected late next week.

DISCUSSION.

Tonight through Sunday night . Large scale upper level ridging continues to dominate the upper level flow across the region with generally clear, dry and mild conditions persisting through the weekend. A few minor weather disturbances moving in from the Pacific will spread some high cloud-cover into the area at times, otherwise mainly clear skies will prevail. Daytime temperatures reached the mid to upper 50s across western and southwest portions of north-central MT this afternoon and with little change over the next few days we can expect similar values. Have increased temperatures in these areas from national blended model guidance, which has been several degrees behind observed temperatures in these areas over the last few days. Unseasonably mild conditions persist for most areas through the weekend with overnight low temperatures in southwest Montana valleys remaining on the colder side under long nights with mainly clear skies and light winds. Hoenisch

Monday through Friday . The dominant high pressure ridge begins to break down as westerly flow aloft increases ahead of a broad Pacific trough. This will result in increased westerly winds for Monday and Tuesday, especially over the plains. Snow shower chances may return to areas along the Divide by Tuesday afternoon as the approaching trough begins to moisten the westerly flow. This activity spills eastward into the remainder of the CWA on Wednesday and may continue into the weekend with the aid of cool and unsettled northwesterly flow and possibly another trough. Areas of higher terrain will see the best chance for measurable precipitation, though spotty showers can't be ruled over the plains/valleys. The period will begin with well above normal temperatures, which will be mostly in the 40s and 50s for lower elevations. The warmest day appears to be Tuesday, when some locations over the plains may see afternoon highs near 60. The combination of winds, temperatures, and low RH could raise some grassland fire weather concerns for brief periods on Monday and Tuesday but the low sun angle and short cool days would likely require higher winds for a longer time in order to warrant fire weather highlights. The aforementioned Pacific troughing will begin to trend temperatures closer to the seasonal average toward the end of the week. RCG

AVIATION. 1030 AM MST Fri Dec 4 2020 (04/18Z TAF period)

VFR conditions are expected over the TAF period as high pressure moves overhead. Winds will generally be light, with the higher winds being found over the plains. Inversions in the valleys may result in brief turbulence in some of the valleys, especially at night. Ludwig

No TAF at KWYS until airport operations resume next spring.

Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information.

PRELIMINARY POINT TEMPS/POPS. GTF 26 59 29 55 / 0 0 0 0 CTB 25 54 27 51 / 0 0 0 0 HLN 16 44 19 45 / 0 0 0 0 BZN 12 44 13 45 / 0 0 0 0 WYS -10 38 -2 37 / 0 0 0 0 DLN 15 43 17 42 / 0 0 0 0 HVR 22 44 22 46 / 0 0 0 0 LWT 24 54 26 54 / 0 0 0 0

TFX WATCHES/WARNINGS/ADVISORIES. None.

http://www.weather.gov/greatfalls


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Helena Regional Airport, MT3 mi27 minN 010.00 miFair38°F18°F44%1037 hPa

Link to 5 minute data for KHLN

Wind History from HLN (wind in knots)
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Last 24hrCalmSW5S4CalmCalmSW3CalmCalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalmCalmN33NE3N3Calm
1 day agoN4W6CalmCalmSW4CalmCalmCalmN3E5SW4S3CalmCalmCalmCalmCalmCalmCalmCalmNW3CalmCalmCalm
2 days agoW10W6CalmCalmE3SE3CalmS3CalmCalmCalmCalmCalmCalmCalmW3CalmNW3W4CalmCalmCalmE3E4

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 Great Falls, MT
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weather_mapweather_map weather_map


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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 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.