Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Polson, MT

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:25AMSunset 8:44PM Wednesday April 25, 2018 11:58 PM MDT (05:58 UTC) Moonrise 2:50PMMoonset 3:53AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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 Polson, MT
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location: 47.7, -114.16     debug


Area Discussion for - Missoula, MT
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Fxus65 kmso 252039
afdmso
area forecast discussion
national weather service missoula mt
239 pm mdt Wed apr 25 2018

Discussion A wave of energy moving south out of canada has led
to mainly some increased cloud cover and a few showers along the
continental divide. This cloud cover will decrease late this
afternoon and evening. Temperatures tonight are expected to stay
slightly warmer than previous nights due to a light easterly wind.

High pressure re-establishes over the region for Thursday into
Friday, bringing plentiful sunshine and well above normal
temperatures to the region. Friday is still expected to be the
warmest day of the week, with many valleys reaching into the upper
70s to low 80s! The warm temperatures will continue to ramp up
snow melt, particularly in the lower elevations. This will lead to
fairly rapid rises on area streams and rivers.

Model guidance continues to support a major change in the weather
Saturday as a low pressure system impacts western montana and
north central idaho Saturday afternoon through Monday afternoon.

A round of isolated to scattered thunderstorms will be possible
Saturday afternoon and evening. Moist southwest flow, steep mid-
level lapse rates, and modest instability Saturday afternoon ahead
of the approaching upper level trough will support thunderstorm
activity across north- central idaho and southwestern montana.

Attention then shifts to Sunday and most of Monday as the slow
moving system moves east of the continental divide and taps into
gulf of mexico moisture from the plains. The system will wrap
moisture around and over the divide and into western montana.

There is below normal confidence among model guidance on where the
heaviest precipitation will occur across western montana and
north-central idaho. However, model guidance does agree on a long-
duration rain event, with moderate rain falling for 12-24+ hours.

There is a significant chance that somewhere in western montana
and north-central idaho will receive 1 to 2+ inches of new rain
this weekend. For those who may be impacted by potential flooding
from rivers and creeks, please read the hydrology section below
for additional details.

Aviation A north to east breeze will develop around 26 00z at
gpi and along the continental divide, with winds gusting as high
as 20 knots this evening at all the terminals except for smn.

Winds will likely continue through the night, though speeds will
diminish slightly. Other than the middle to high clouds and a few
showers along the divide, expectVFR conditions to continue into
tonight. Plentiful sunshine and warm conditions will return for
Thursday.

Hydrology
Significant rises in creeks and rivers are possible Sunday into
Monday. Low elevation snowmelt from abnormally high temperatures
Thursday and Friday will continue to bring rises in creeks and
rivers. Rainfall amounts of 1 to 2+ inches are expected over much
of the area associated with the incoming storm system this
weekend. The expected rainfall, combined with lower elevation
snowmelt, could cause some flooding problems, especially for
smaller creeks. Significant rises are also expected for many of
the rivers, including possible quick rises on the south fork of
the clearwater river. Rock slides and water running across
roadways may also occur. In northwest montana, the yaak and fisher
rivers could exceed flood stage by late Sunday night into Monday
morning.

Mso watches warnings advisories
Mt... None.

Id... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kalispell, Glacier Park International Airport, MT42 mi63 minN 010.00 miFair45°F32°F61%1021.3 hPa

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Last 24hrNW4CalmCalmCalmCalmCalmCalmCalmCalmNE3CalmCalmCalmE4E8NE54NE9NE10NE5NE8N5N3Calm
1 day agoW3CalmCalmW3CalmNW33CalmN4NE7NE8Calm46N333SE9S10S9S4W4CalmCalm
2 days agoN7N6N8N4N10N7CalmN5CalmNE10E4E34S33NE8SE65N7NE7S4CalmCalmW3

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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wmap_P
GOES Local Image of PacificNorthwest    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 Missoula, MT (1,6,7,8)
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Ground Weather Radar Station Missoula, 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.