Marine Weather and Tides
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.
|Sunrise 6:20AM||Sunset 8:23PM||Sunday April 23, 2017 1:40 PM MDT (19:40 UTC)||Moonrise 4:10AM||Moonset 4:04PM||Illumination 6%|
EDIT (on/off)  Help
7 Day Forecast for Marine Location Near Gardiner, MTHourly EDIT Help
Area Discussion for - Billings, MT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus65 kbyz 231539|
area forecast discussion... Updated
national weather service billings mt
939 am mdt Sun apr 23 2017
Tweaked pop's for this morning and afternoon based on latest
satellite and model data. Currently some high based radar returns
over mountains, but main forcing to arrive later this afternoon
and affect central montana before pushing NE through the evening.
Lots more energy comes through entire CWA tonight. Extended fog
through morning in the eastern zones from baker to near forsyth.
Short term Valid for tdy and mon...
deep trough moving onto the pacific northwest coast this morning.
Mid level flow has backed with moisture at 700mb level increasing
over western zones. Shortwave energy is progged to eject out of
the this trough as it moves inland today. Showers were increasing
over idaho into far western montana early this morning. Shortwave
energy will kick across western zones this morning and into
central zones this afternoon and produce scattered showers. Not a
great deal of surface CAPE available for thunder today, but enough
mid level CAPE present, so will keep thunder in the forecast.
Will keep the higher chance of showers over western and northwest
zones. Highs will be warmer today, but may be tempered by
increasing cloud cover.
More energy, albeit weaker, will stream across the area for a
continued chance of showers tonight. A stronger wave organizes for
Monday and Monday night and this will bring the best chance of
showers to western and central zones. The GFS was very robust with
qpf amounts over the west, mainly along the foothills, with over
an inche of QPF Monday trough Monday night. NAM was also heavy
with rain totals, but the ECMWF was much lighter. Will side with
the GFS as the ec seems strangely light on rain amounts given the
upslope component and QG forcing available. Looks like the
mountains could receive a hefty amount of snow with this system
should the GFS verify. Will keep hwo running, along with the
weather story, but will hold off on a watch for now given the
light QPF amounts of the ec. Should the ec move in the gfs
direction, may need to consider a winter storm watch for the
mountains. Some wet snow will likely mix in over the foothills for
light accumulations, but it appears to be mainly a rain event for
locations below 6 thousand feet. Twh
Long term Valid for tue... Wed... Thu... Fri... Sat...
extended forecast begins with continued lower elevation rain and|
mountain snow on Tuesday as models bring upper trough over the
region. Low-level upslope flow is expected for much of Tuesday,
indicating that rain should hang on most of the day. Some wet snow
is possible over fallon and carter counties as northeasterly
winds advect cooler air into that area. For now think that ground
is warm enough to limit snow accumulations.
Semi-zonal, cyclonic flow takes hold behind the departing upper
trough. This pattern can produce more showers over the lower
elevations and snow in the mountains. A more organized upper low
is progged to track over ut and co later in the week, which should
keep most of the heavier precipitation south of our area... But if
the track were to shift northward we could have another widespread
rain/mountain snow event affecting the area in the Thursday
night-Friday night timeframe.
High temperatures should generally be below normal, in the 40s and
50s, for Tuesday-Friday.
Areas of low clouds and fog, with ifr or lower flight conditions,
will impact eastern parts from kmls-bhk til midday.VFR will
prevail otherwise today. A pacific disturbance and cold front will
bring a good chance of showers late this afternoon and tonight.
Expect local MVFR with these showers, and occasional mountain
obscurations in rain and snow. Jkl
Preliminary point temp/pops
Tdy Mon Tue Wed Thu Fri sat
bil 066 042/058 038/049 036/053 037/051 036/051 036/056
2/t 55/t 77/w 35/w 54/w 33/w 33/w
lvm 061 037/055 033/053 033/052 032/050 030/050 029/054
4/t 67/t 76/t 46/t 45/w 54/w 33/w
hdn 069 042/061 038/051 035/057 038/053 036/053 036/057
1/e 35/t 77/w 24/w 54/w 34/w 43/w
mls 066 040/058 035/049 033/054 036/051 036/053 037/057
1/e 42/w 36/w 13/w 34/w 23/w 32/w
4bq 070 041/059 036/048 030/051 033/049 034/049 034/055
0/b 33/w 58/w 13/w 24/w 34/w 33/w
bhk 058 035/053 028/046 026/050 030/050 032/051 033/055
0/n 52/w 22/w 12/w 23/w 33/w 33/w
shr 068 040/056 036/047 033/052 035/049 034/047 032/050
0/e 37/t 88/w 24/w 44/w 45/w 33/w
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|West Yellowstone, MT||32 mi||51 min||SSW 15 G 18||10.00 mi||Overcast||45°F||33°F||66%||1011.2 hPa|
Wind History from WYS (wind in knots)
|1 day ago||N|
|2 days ago||S|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of NorthernPlains EDIT
Wind Forecast for Billings, MT (15,3,4,5)(on/off)  Help
Ad by Google
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.