Thursday, October21, 2021
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Marine Weather and Tides
Neihart, MT

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:51AMSunset 6:27PM Thursday October 21, 2021 3:59 PM MDT (21:59 UTC) Moonrise 6:06PMMoonset 7:48AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 Neihart, MT
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location: 46.95, -110.72     debug


Area Discussion for - Great Falls, MT
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FXUS65 KTFX 212011 AFDTFX

Area Forecast Discussion National Weather Service Great Falls MT 211 PM MDT Thu Oct 21 2021

SYNOPSIS.

Temperatures warm to between 10 and 15 degrees above normal Friday under warm southwest breezes. However, temperatures will cool back closer to normal through the weekend, as a Pacific system brings a chance of mainly mountain precipitation to the region, but it will also continue the gusty southwest winds.

DISCUSSION.

Today through Friday .

Dry and warm conditions with breezy winds will continue across north-central and southwest Montana today. A narrow high pressure ridge will move into the area tonight, which will help keep the area mostly clear as winds only slightly decrease, keeping lows mostly in the 30s. The ridge will start to exit the area on Friday as a deepening low pressure trough moves on to the Pacific coast. The shift to a more southwesterly flow aloft will bring increasing high cloudiness to the area with breezy southerly surface winds that will further warm and dry the area. Highs mostly in the mid 60s to lower 70s at lower elevations will help decrease afternoon humidity into the 20 to 30 percent range. This, combined with 10 to 20 mph southerly winds gusting to 30 mph at times, will cause elevated fire weather conditions during the afternoon hours; however, fire weather highlights are not anticipated at this time.

Friday Night through next Thursday .

The Pacific trough will drive a change in the weather pattern across the area through this period. A shortwave trough will bring a good chance of precipitation to much of the area Friday night into Saturday night, as the snow level remains at or above 6000 feet with minor accumulation above that level. However, it will also bring another round of westerly downslope winds to the plains, limiting the rainfall there. The moist southwest flow aloft re-establishes itself over the area behind this shortwave Sunday into Monday to keep a good chance of precipitation over the mountains, as a low pressure center reinforces the Pacific coast trough. However, persistent southwest downslope winds will keep the plains mostly dry, as temperatures warm back above normal by Monday. The trough will weaken and start to split (weak shortwave moves over us, weak shortwave moves over the Southwest US) as the system moves over the Rockies on Tuesday. Again, this will keep any precipitation over the mountains with gusty southwest downslope winds limiting precipitation elsewhere. Broad high pressure ridging from the Pacific into the Pacific Southwest will then redevelop Wednesday into Thursday, putting Montana under a strong and more anticyclonic westerly flow aloft, which will keep the main chance for precipitation over the mountains. However, these increasing winds aloft will bring the best chance for strong westerly downsloping winds to the plains Tuesday night into Wednesday, so this period will be monitored for potential high wind highlights. Despite these warming winds Tuesday through Thursday, potential cloudiness should keep temperatures close to seasonal averages. -Coulston


AVIATION. 1134 AM MDT Thu Oct 21 2021 (21/18Z TAF period)

VFR conditions are expected to persist across the region, however, patchy fog is possible for KWYS later this evening, though confidence is low. Upper level ridging expected this evening, bringing in more steady Westerlies throughout much of the region. Cloud cover will continue to persist, remaining in the mid- to high- levels. Mountain obscurity is expected at times as well, especially along the Rocky Mountain Front. -Pierce/Moldan

Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information.

PRELIMINARY POINT TEMPS/POPS. GTF 36 70 42 57 / 0 10 30 20 CTB 32 65 39 53 / 0 10 60 30 HLN 38 70 40 57 / 0 10 50 20 BZN 35 68 37 55 / 0 0 20 20 WYS 28 56 31 41 / 0 0 20 40 DLN 36 64 36 51 / 0 10 40 20 HVR 29 68 40 58 / 0 0 30 20 LWT 35 68 39 57 / 0 0 10 10

TFX WATCHES/WARNINGS/ADVISORIES. None.

http://www.weather.gov/greatfalls


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Malmstrom Air Force Base, MT46 mi61 minWNW 13 G 1910.00 miA Few Clouds62°F33°F35%1020.4 hPa

Link to 5 minute data for KGFA

Wind History from GFA (wind in knots)
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Last 24hrN4SW11SW10SW10SW11W10SW7W7W8SW5SW6SW8SW7SW9SW5SW9SW14SW4SW6SW10
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1 day agoNE9NE9NE8NE8N30S5S4N3N4S70W4SE3000NE3NE3E3E6NE7E7NE4
2 days agoN11N11N11N8N10N9N6NW6NW5N6N8N7N6N3000NE300NW3N4N8NE9

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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