Saturday, February23, 2019

Marine Weather and Tides
Silver Gate, MT

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:11AMSunset 6:03PM Saturday February 23, 2019 2:50 PM MST (21:50 UTC) Moonrise 11:14PMMoonset 9:39AM Illumination 80% 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 231622
area forecast discussion
national weather service billings mt
922 am mst Sat feb 23 2019

Quick update this morning to cancel the wind advisory for the
livingston area. Winds have dropped off and are expected to
continue to do so.

Otherwise, the going forecast appears in good shape. Gilstad

Short term Valid for tdy and sun...

early morning satellite imagery shows a shortwave moving from the
pacnw into western mt, with generally clear skies across our lower
elevations. Lee side pressure falls have allowed gap winds to
increase, and recently the livingston airport reported a peak wind
gust of 65 mph. This is accompanied by reduced visibility in
blowing snow. Canadian front has not yet crossed the mt border,
and there appears to be a few more hours of strong wind potential,
after which destabilization will reduce the risk of gap winds.

Have opted to issue a wind advisory for the livingston area for 60
mph gusts and blowing snow impacting travel on i-90.

Lots of things happening this weekend. Passage of western mt
shortwave will be accompanied by the next surge of cold air from
canada, with a FROPA timing ranging from 20z in our north to 01z
in our south (i.E. Mid to late afternoon). We should see some snow
showers with this fropa, with enhancement expected along our
southern foothills by early this evening. Recent high res models
have been trending toward a brief period of accumulating snow for
our south and this will be aided by 7+ c km lapse rates as
upslope winds deepen. Have issued a winter weather advisory for
red lodge and the beartooth foothills for something on the order
of 3-5 inches of snow from late afternoon thru tonight.

Otherwise, the main show over the next few days is the period of
moist overrunning as cold air settles in east of the mountains.

Heavy snow will fall over the sw-w aspects of the beartooth
absaroka mountains and have upgraded the watch to a winter storm
warning for 1 to 3 feet of snow. Heads up for outdoor
recreationists that avalanche danger will increase. Lower
elevation snow amounts are more difficult to determine as they
will be dependent on position of upper level jet and depth of cold
air. Though moisture content does not appear anomalously high, we
are looking at an extended duration of isentropic ascent and thus
overrunning snowfall that will reach several inches for much of
our cwa. Have expanded the winter storm watch to include mt
counties as far east as rosebud. Greatest amounts should fall from
billings westward and northward and this is generally consistent
with the latest guidance. Cross sections along the northeast
slopes of the mountains show a shallowing of the cold air
particularly by Sunday night, so it is possible (if not likely)
that heaviest amounts will end up north of the foothills, and this
is certainly consistent with a conceptual model. Sheridan should
see the least snowfall.

Temperatures today will climb toward the low-mid 30s today in the
pre-frontal regime. Temps will crash hard tonight and MAX out
only in the single digits across our lower elevations on Sunday.


Long term Valid for mon... Tue... Wed... Thu... Fri...

snow showers will continue into Monday and Tuesday as the pacific
moisture continues to move into south central montana. Mid-level
winds combined with the arctic air is going to allow snow showers
to continue before shifting north of roundup as the jet shifts
north. The location of the heaviest snow could always change
depending on where the jet sets up as there are still model
differences. For red lodge and the foothills, the arctic air
becomes shallower along with the downsloping winds which will
allow for little to no snow Monday and Monday night. Amounts of
8-12 inches will be possible west of hysham to the pryor mountains
through Tuesday. The mountains will see snow totals of 1 to 3
feet possible. High temperatures Monday will remain in the single
digits above zero with warmer temperatures in the foothills. Lows
will reach single digits below zero.

A weak ridging pattern will move into the area Tuesday evening
allowing a break in the snow and slightly warmer temperatures
through Thursday. A light band of snow may produce light
accumulations over south central montana but additional moisture
will be needed for this to occur. High temps will be in the teens
and 20's with lows temps in the single digits above zero.

The next chance of snow showers moves into the area on Thursday
as the upper ridge begins to break down. Models are showing
significant differences at this time so pops have been kept low.

Another chance of arctic air moves into the area with a passing
cold front on Friday night bringing below zero lows and highs
struggling to get above zero. Carrothers

Strong southwest winds will continue near klvm with gusts around
30-40kts today. Patchy blowing and drifting snow is possible with
these gusty winds, with visibility as low as 3sm at times.

OtherwiseVFR conditions are expected to prevail today with
increasing mid and high clouds. Bt

Preliminary point temp pops
Tdy Sun Mon Tue Wed Thu fri
bil 032 901 006 905 003 904 008 910 013 005 025 009 016
3 S 58 S 97 S 64 S 22 S 24 j 43 j
lvm 028 004 009 000 011 000 020 001 029 021 035 014 024
4 S 69 S 88 S 75 S 33 S 34 j 33 j
hdn 032 905 007 907 006 904 010 910 016 002 024 006 017
3 S 35 S 86 S 53 S 22 S 33 j 43 j
mls 027 910 001 911 001 905 005 912 012 000 017 001 011
1 b 00 b 65 S 64 S 22 S 22 j 22 j
4bq 031 906 005 908 004 905 008 910 016 004 026 005 016
1 u 11 E 73 S 22 S 21 E 21 E 33 j
bhk 025 910 000 914 000 907 005 914 011 000 018 901 009
0 u 10 b 42 S 53 S 12 S 11 E 21 e
shr 033 901 012 904 013 003 016 905 023 011 031 011 022
2 S 53 S 53 S 22 S 21 b 12 j 32 j

Byz watches warnings advisories
Mt... Winter storm watch in effect from Sunday afternoon through
Monday evening for zones 28>31-34-35-38>42-56>58-63>66-68.

Winter weather advisory in effect from 3 pm this afternoon to
6 am mst Sunday for zones 56-66.

Winter storm warning in effect until midnight mst Tuesday
night for zone 67.

Wy... None.

Weather.Gov billings

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Yellowstone Lake, WY41 mi1.9 hrsVar 6 mi13°F6°F74%1022.3 hPa

Wind History from P60 (wind in knots)
Last 24hrCalmCalmCalmSE3CalmSE3E34W7
1 day agoCalmCalmE333343SE3CalmCalmCalmNW3NW3NW3NW3NW3CalmW3CalmNW3CalmCalmCalm
2 days agoCalmCalmCalmCalmCalmE335W5W5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

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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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.
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Wind Forecast for Billings, MT (16,3,4,5)
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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 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 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.