Saturday, May26, 2018 L-36.com


Marine Weather and Tides
Bozeman, MT

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:40AMSunset 9:02PM Friday May 25, 2018 10:23 PM MDT (04:23 UTC) Moonrise 3:56PMMoonset 3:07AM Illumination 86% 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 Bozeman, MT
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location: 45.71, -110.99     debug


Area Discussion for - Billings, MT
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Fxus65 kbyz 260259
afdbyz
area forecast discussion... Updated
national weather service billings mt
859 pm mdt Fri may 25 2018

Update
A few isolated showers and thunderstorms moved off the mountains
this afternoon and evening but activity is dissipating with
diurnal cooling. Update sent. Borsum

Short term Valid for Sat and sun...

ridging which is over the area today, will begin to shift eastward
as a low pressure system digs into the southwest u.S. . A cold
front attached to energy over western canada will slide through
during the afternoon on Saturday. Ahead of the front, temperatures
will warm well into the upper 80s. Instability during peak
heating with terrain and frontal lift, should initiate scattered
convection from lewistown south to big timber. Forward motion on
storms should be pretty quick but if we get any right movers
forward motion will be around 10 mph. Pwat values near an inch
combined with slow storm motion could cause localized flooding in
and around these storms. As is usually the case in this part of
the country hail and gusty winds will be a concern in any stronger
storms that form.

As the upper-low pivots across the rockies, surface low develops
over wyoming. Moisture streaming around the north side of the
low, with northeast flow and jet energy in place will promote
widespread showers and thunderstorms Sunday afternoon into Monday.

Models still showing quite a bit of uncertainty with the rainfall
timing and placement which is making the river forecasts quite
tricky. GFS has backed off a bit on rainfall amounts for the
billings area southwestward into the foothills. Latest run has
0.50-0.75 inches of rain in that area, with 1 to 2 inches in the
mountains. European model brings even less for the foothills but
produces more rain over the eastern part of mt, with rain hanging
on well into Monday.

With many of our area rivers at or near flood stage and their
forecast largely dependent on how much rainfall we see our
message is prepare now for a worst case scenario but understand
there are many possibilities given that our flooding is largely
based on the rainfall forecast.

With heavy rainfall rates in these storms this weekend, we
anticipate localized flooding impacts in low-lying areas and along
swollen creeks and streams. Please stay up to date with our latest
river forecasts and have a way to get watches and warnings while
traveling this holiday weekend.

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

cooler and unsettled Monday with highs in the mid 70s. Model
uncertainty quite high with rainfall placement on Monday, but
generally keeping chance showers and thunderstorms through the
day. Warming trend into Tuesday and Wednesday with highs back into
the 80s. The rainfall during this weekend is expected to bring
many of the area rivers to crest some time early in the week. High
flows, flooding, and bank erosion will likely still be a concern
well into the week.

Another front moves through some time between Tuesday and
Wednesday bringing another round of thunderstorms. Unsettled
pattern continues through the beginning of june with models
hinting at a strong low pressure system diving down from canada to
end the period. Walsh

Aviation
An isolated shower or thunderstorm will be possible from kbil
westward for the remainder of the evening. Otherwise,VFR
conditions will prevail across the lower elevations. In addition,
some mountain obscuration will be possible at times throughout the
night. Hooley

Preliminary point temp pops
Sat Sun Mon Tue Wed Thu fri
-----------------------------------------------------------
bil 059 086 056 073 054 072 052 076 054 080 055 073 052 074
22 t 57 t 75 W 43 t 22 t 23 t 43 t
lvm 054 080 051 068 049 069 047 073 048 076 049 070 048 069
13 t 58 t 75 t 34 t 22 t 33 t 33 t
hdn 058 088 057 076 055 073 053 078 054 084 055 078 052 078
11 u 57 t 66 t 43 W 31 u 23 t 52 t
mls 060 092 061 081 058 075 055 077 056 083 059 080 057 077
00 u 44 t 65 W 43 W 21 u 22 t 52 w
4bq 059 092 059 080 058 072 054 075 054 083 057 084 057 079
00 u 36 t 77 t 54 W 21 u 22 t 32 t
bhk 058 088 058 080 056 072 053 074 052 082 056 081 055 076
00 u 25 t 77 t 53 W 22 W 12 W 32 w
shr 054 085 055 070 052 068 049 074 049 080 053 077 052 075
00 u 38 t 76 t 53 t 32 t 23 t 32 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, MT10 mi27 minS 310.00 miFair59°F52°F78%1008.7 hPa

Wind History from BZN (wind in knots)
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Last 24hrCalmE5S4E3S6SE8SE5SE3S53SE3CalmN35N5N534NW3E5SE7S5N3S3
1 day agoS7SE8SE5S3E3SE7E4SE5S4SE4CalmCalm4SW13
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2 days agoN5SW3CalmNE5S4NW3E3CalmCalmW4CalmCalmCalmCalmNW5NE3S4W6W7NW4N3NE5E4SE7

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 NorthernPlains    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Billings, MT (0,6,7,8)
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Ground Weather Radar Station Billings, 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 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.