Heron, MT Marine Weather and Tide Forecast

Marine Weather and Tide Forecast for Heron, MT

February 20, 2024 2:56 PM PST (22:56 UTC) Change Location
Sunrise 6:42 AM   Sunset 5:18 PM
Moonrise 2:04 PM   Moonset 6:22 AM 
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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.

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7 Day Forecast for Marine Location Near Heron, MT
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Area Discussion for - Spokane, WA
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Area Forecast Discussion National Weather Service Spokane WA 245 PM PST Tue Feb 20 2024

Weather will be mild and unsettled through the week, as weak disturbances rotating around a broad low pressure pass through the area bringing showers through Thursday. A significant pattern change is possible by the end of the weekend with increasing chance for a period of heavy mountain snow and widespread gusty winds.

Bottom line up front: The main message is stronger, colder storms are coming in later this weekend. Be prepared for winter travel around the mountain passes and windy conditions in the valleys.

Today through Thursday: Early afternoon satellite and radar trends indicate we remain downstream from the cold core upper level trough off the California coast, aimed at bringing a plume of moisture to the west coast. Precipitation amounts over the last 24 hours has been mostly light for areas across the Columbia Basin into the West Plains and central Idaho Panhandle (less than 0.15"). Areas in the Cascades, Blue Mountains, Idaho Panhandle mountains have received closer to a quarter of an inch.

This afternoon into early evening, there remains a small chance (10%) for convection with isolated heavier rain showers and a rumble of thunder from the Blue Mountains into the Camas Prairie and Clearwater Mountains. A similar setup is anticipated for Wednesday, a bit farther north from the WA/ID state line east into the Panhandle. The available potential instability is quite marginal (less than 100 J/kg) and the shortwave feature is mostly weak, however the environment is unstable with fairly steep lapse rates (7-8 C/km).

The upper level trough will slowly nudge northward through Thursday, keeping the Inland Northwest under a moist (140% of normal for Pwat) and unstable pattern. Additional rounds of rain showers and mountain snow is expected through late this week.
Temperatures look to be fairly normal/typical for this time of year and rather "mild" feeling for late February. Soak it up (pun intended) while we can, a change in the weather comes late this weekend. /Dewey

Friday through Saturday: Warmer than average temperatures will continue into Saturday. Late Saturday a pattern change starts with a storm system setting up to come out of the northwest.

Sunday through Tuesday: There will be a persistent west and northwest flow with cooling temperatures as a cold low pressure system sags south. Expect heaviest snow at times in the Cascades to spread to the northern mountains of Washington and Idaho.

There is a 60% chance of greater than 30 inches of snow at Stevens Pass from Late Saturday night through Tuesday (72 hours).
The first wave of higher snow rates will hit around the early evening according to current forecasts but timing can change.

60% probability of > 8 inches at Lookout Pass Idaho.

There will be some lighter accumulations of snow in the valleys when the cold temperatures move in Sunday night.

Colder and Windy conditions will also spread into the lowlands including the Waterville Plateau, Columbia Basin, through Spokane toward Coeur d'Alene Sunday.

There is a greater than 50% chance of wind gusts greater than 45 mph by Sunday evening at places like: Pullman, WA, Moses Lake and the Waterville Plateau area of central Washington. Higher mountain locations will be very windy as well.

The main message is stronger, colder storms are coming in later this weekend. Be prepared for winter travel around the mountain passes and windy conditions in the valleys. TC

18Z TAFS: Periods of rain showers will move through the region today and taper off by 00z this afternoon. Light winds and a moist boundary layer will leave most locations at IFR conditions for ceilings. Overnight development of stratus and fog seem likely for GEG, SFF, MWH, EAT.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Confidence is low for the development and severity of fog overnight, but have included some reduced visibilities to begin the trend. /Dewey


Confidence descriptors: Low - Less than a 30 percent chance Moderate - 30 to 70 percent chance High - Greater than a 70 percent chance

For additional probabilistic information for NWS Spokane airports, please refer to the Aviation Dashboard on our webpage: https:// www.weather.gov/otx/avndashboard

Spokane 33 45 35 46 30 48 / 20 40 20 10 0 0 Coeur d'Alene 33 42 35 43 30 45 / 10 50 30 20 0 10 Pullman 35 48 34 49 31 50 / 20 40 30 10 0 10 Lewiston 38 53 38 54 36 56 / 20 40 30 0 0 0 Colville 32 41 34 44 29 45 / 10 50 30 10 0 10 Sandpoint 34 40 36 40 32 42 / 30 60 50 60 0 20 Kellogg 35 44 37 43 31 48 / 20 60 50 50 0 10 Moses Lake 34 49 34 50 31 51 / 20 20 10 0 0 0 Wenatchee 36 44 34 48 34 49 / 30 30 20 0 0 0 Omak 36 44 35 49 33 48 / 10 40 10 0 0 0


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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KSZT37 sm21 mincalm3 smOvercast Lt Rain 37°F37°F100%29.94
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Wind History from SZT
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GEOS Local Image of Pacific Northwest   

Spokane, WA,

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