Marine Weather and Tides
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.
|Sunrise 7:08AM||Sunset 7:25PM||Thursday September 20, 2018 3:02 AM MDT (09:02 UTC)||Moonrise 4:40PM||Moonset 1:32AM||Illumination 79%|
7 Day Forecast for Marine Location Near Big Sky, MTHourly EDIT Help
Area Discussion for - Great Falls, MT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus65 ktfx 200552|
area forecast discussion
national weather service great falls mt
1150 pm mdt Wed sep 19 2018
aviation section updated
Most of the forecast through Thursday morning remains valid.
However, adjusted pops and QPF to better match our neighbors'
changes. A swath of rain apparently tied to the trowal of a 700 mb
low pressure center will move from southwest mt this evening and
early Thursday morning to eastern parts of north-central mt over
the course of Thursday morning. In addition, deep lift ahead of a
mid- to upper-level pacific disturbance will trigger additional
rain, especially over eastern portions of north-central mt during
the course of this evening into Thursday morning. Thus, the
greatest rainfall through Thursday morning (i.E. 0.10 to 0.40
inches) is expected over blaine and fergus counties, as well as
far-eastern parts of judith basin, chouteau, and hill counties.
Lastly, elevated instability has permitted the development of a
few thunderstorms over southwest mt. This activity should wane
shortly after midnight tonight as instability weakens and is
consumed by ongoing storms.
Low clouds with areas of mid-elevation fog remain over the area
this evening. Rain showers will spread from southwest to northeast
overnight through early Thursday. Periods of rain continue at
times on Thursday, with snow levels dropping to near 7000 feet.
Areas of frost are likely under clearing skies early Friday. Fair
and seasonably cool weather prevails through the weekend.
Light rain and isolated thunderstorms continues to move
northeastward through the region. Expect the rain to exit the
havre lewistown areas around mid day Thursday. Low ceilings and some
patchy fog likely in the wake of ending rainfall. Scattered
showers isolated thunderstorms to affect areas from cut bank to
havre on Thursday afternoon. Expect mountains passes to be obscured
through the period. Overall expect ifr conditions through mid day,
with some lifr conditions at times. Brusda
Issued 303 pm mdt Wed sep 19 2018|
southwest montana enjoyed mild and dry conditions today, generally
south of interstate 90. Further north, cool and stable airmass
maintained widespread low clouds with areas of fog and drizzle
over mountain passes. A band of rain showers formed to the north
and east of lewistown associated with southerly mid-level winds
lifting over the shallow air mass. This sets the stage for the
next round of overnight precipitation across the region.
Satellite imagery shows developing cumulus over the southwest
mountains. Rain showers with a few rumbles of thunder are expected
to continue developing in this area through the evening. Areas of
rain become more widespread as a rather high amplitude trough
crosses rocky mountains through early Thursday. Cloudy conditions
will persist until winds switch to westerly behind the departing
trough on Thursday.
Today's forecast guidance moves this primary wave out into
eastern montana earlier than previous forecasts. However, a new
feature has emerged as a smaller shortwave trough ejects from
southern british columbia and crosses north-central montana
Thursday afternoon. Thus, even after a break in rainfall mid-day
Thursday, additional rain is possible Thursday afternoon. The
highest rain amounts are expected along and east of a line from
lewistown to havre where 0.5 to 0.8 inches are possible through
Thursday night. In southwest montana, weather conditions will
improve by mid-day with seasonally cool temperatures.
Clearing skies overnight Thursday enable a frosty morning for many
areas early Friday. Fair weather follows for most areas through
the weekend under a dry westerly flow aloft. A few showers will be
possible along the international border. Beyond that, another cold
front is expected to move southward into the region early next
week, but again precipitation amounts do not look overly heavy at
this time. Some mountain snow is possible next week, with lower
elevations generally averaging about 5 to 10 degrees below normal.
Preliminary point temps pops
Gtf 41 56 36 67 40 60 30 10
ctb 38 56 34 62 20 80 30 20
hln 44 61 39 70 40 30 10 0
bzn 42 60 36 70 60 50 10 0
wey 32 57 27 63 20 20 0 0
dln 38 60 33 69 80 30 0 0
hvr 42 54 37 65 70 80 30 10
lwt 39 50 34 65 70 70 20 0
Tfx watches warnings advisories
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|Bozeman, Gallatin Field, MT||38 mi||67 min||ESE 7||10.00 mi||Light Rain||46°F||43°F||89%||1014 hPa|
Wind History from BZN (wind in knots)
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|2 days ago||SW||Calm||S||SE||S||SE||S||S||Calm||NW||N||NW||N||NW||Calm||S||SW||SW||N||W||Calm||NE |
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Wind Forecast for Great Falls, MT (5,6,7,8)(on/off)  Help
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