First Snowfall Of The Season Across Much Of The West

First Snowfall Of The Season Across Much Of The West

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First Snowfall Of The Season Across Much Of The West

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Many US & Canadian ski resorts across the West will get their first taste of winter this week with a solid helping of mountain snow. Here is a look at what has fallen already and what is on the way this week. Weather maps provided by Intellicast.com 

Photo of Crystal Mountain, WA

Mt Baker via Facebook

 

Winter Storm Warning For Tahoe

NOAA has issued their first Winter Storm Warning of the 2012 -2013 season for Lake Tahoe. 

EARLY SEASON WINTER STORM WILL MOVE INTO NORTHERN CALIFORNIA AND NORTHERN NEVADA EARLY MONDAY. THIS WILL BRING GUSTY WINDS…RAIN AND SNOW TO THE REGION. MODERATE TO HEAVY SNOW ACCUMULATIONS ARE EXPECTED IN THE EASTERN SIERRA FROM LAKE TAHOE NORTH INTO WESTERN LASSEN COUNTY…WITH LESSER ACCUMULATIONS IN THE HIGH SIERRA OF MONO COUNTY. THIS STORM HAS POTENTIAL TO IMPACT MOUNTAIN ROADS AND PASSES WITH SLICK AND ICY CONDITIONS.

..WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM MONDAY TO 11 AM PDT TUESDAY…

* TIMING: EARLY MONDAY MORNING THROUGH TUESDAY MORNING.

* SNOW ACCUMULATIONS: 10 TO 18 INCHES ABOVE 7000 FEET…4 TO 8 INCHES BELOW 7000 FEET.

* WINDS: SOUTHWEST 20 TO 30 MPH WITH GUSTS TO 50 MPH. RIDGE GUSTS OVER 100 MPH.

* SNOW LEVELS: AROUND 6500 FEET FALLING TO LAKE TAHOE LEVEL.

* IMPACTS: HEAVY SNOW WILL CREATE HAZARDOUS TRAVEL CONDITIONS MONDAY AND MONDAY NIGHT

…COLD FALL STORM NEARING REGION…

The Wasatch Mountains 

A TREND TOWARDS COLDER AND WETTER WEATHER IS EXPECTED ACROSS UTAH AND SOUTHWEST WYOMING THROUGH MUCH OF THE WEEK AS A COLD PACIFIC STORM SYSTEM SLOWLY CROSSES THE REGION. MUCH OF THE PRECIPITATION FROM THIS STORM WILL AFFECT NORTHERN AND CENTRAL UTAH AND SOUTHWEST WYOMING.

RAIN WILL DEVELOP ACROSS PORTIONS OF NORTHERN UTAH TONIGHT WITH SNOW LEVELS ABOVE 9000 FEET. STRONG GUSTY SOUTHERLY WINDS ARE EXPECTED ACROSS MUCH OF THE AREA SOUTH OF INTERSTATE 80 MONDAY AFTERNOON AND EVENING.

SNOW LEVELS WILL BEGIN TO LOWER ACROSS NORTHERN UTAH AND SOUTHWEST WYOMING MONDAY NIGHT AND THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATION IN THE NORTHERN MOUNTAINS MONDAY NIGHT THROUGH THURSDAY NIGHT. IT APPEARS THAT SNOW WILL REACH THE VALLEY FLOORS NEAR THE IDAHO BORDER LATE TUESDAY. SNOW WILL THEN SPREAD SOUTH TUESDAY NIGHT AND REACH THE WEST CENTRAL VALLEYS WEDNESDAY. SNOW MAY CONTINUE AT TIMES ACROSS NORTHERN UTAH AND SOUTHWEST WYOMING INTO EARLY FRIDAY.

MOST VALLEY ACCUMULATION THROUGH WEDNESDAY WILL BE BRIEF AND LIGHT. HOWEVER WHERE SNOW ACCUMULATES ON TREES THAT STILL HAVE LEAVES…DOWNED BRANCHES MAY RESULT. THE COLLECTION OF FALLEN LEAVES WILL LIKELY CAUSE DRAINAGE ISSUES ON AREA ROADWAYS…RESULTING IN PONDING OF WATER ON ROADWAYS.  TEMPERATURES WILL CONTINUE TO COOL THROUGH WEDNESDAY. HIGHS ACROSS THE NORTHERN VALLEYS WILL GENERALLY BE IN THE 40S BY WEDNESDAY AND IT WILL STAY CHILLY INTO FRIDAY BEFORE TEMPERATURES START TO RECOVER. A HARD FREEZE IS LIKELY ACROSS MUCH OF THE REGION BEGINNING WEDNESDAY NIGHT AND CONTINUING EACH NIGHT INTO SATURDAY. – NOAA

…FIRST SIGNIFICANT SNOW OF THE SEASON FOR IDAHO…

A COLD PACIFIC STORM ARRIVES IN THE GEM STATE MONDAY MORNING. AT FIRST…RAIN WILL SPREAD INTO CENTRAL AND EASTERN IDAHO FROM THE SOUTH AND WEST. BUT BY MONDAY AFTERNOON…MUCH COLDER AIR IN THE ELEVATIONS ABOVE 7500 FEET WILL CHANGE THE RAIN TO SNOW. DURING THE OVERNIGHT HOURS MONDAY NIGHT AND TUESDAY NIGHT…SNOW WILL ACCUMULATE EVEN AS LOW AS 5500 FT ELEVATION.

AT THIS TIME…SNOW AMOUNTS FROM MONDAY MORNING THROUGH WEDNESDAY MORNING SHOULD BE IN THE 5 TO 8 INCH RANGE FOR ELEVATIONS ABOVE 7500 FEET IN THE SAWTOOTHS AND THE MOUNTAINS OF THE WOOD RIVER BASIN. IN OTHER PLACES ABOVE THE 5500 FOOT ELEVATION…SNOW ACCUMULATIONS WILL BE UNDER 5 INCHES FOR THE ENTIRE TWO DAY PERIOD.

ONLY RAIN AND BREEZY CONDITIONS ARE EXPECTED IN THE SNAKE RIVER PLAIN AND EASTERN MAGIC VALLEY. – NOAA

…SIGNIFICANT MOUNTAIN SNOWFALL POSSIBLE MONDAY INTO TUESDAY MORNING…

Jackson Hole, WY 

A STRONG STORM OFF THE WEST COAST EARLY THIS WEEK WILL RESULT IN A MOIST SOUTHWEST FLOW…WITH A FEW EMBEDDED DISTURBANCES THROUGH THE MIDDLE OF THE WEEK. THE SOUTHWEST FLOW WILL BE RELATIVELY WARM AT FIRST…WITH PRECIPITATION EXPECTED TO BE RAIN IN THE LOWER ELEVATIONS AND SNOW IN THE MOUNTAINS. THIS WILL CHANGE MONDAY NIGHT INTO TUESDAY…AS A COLD FRONT MOVES ACROSS WESTERN WYOMING… LOWERING SNOW LEVELS TO THE VALLEY FLOOR IN MOST PLACES. WESTERN MOUNTAIN RANGES OF WYOMING…WILL LIKELY EXPERIENCE PERIODS OF LIGHT…TO OCCASIONALLY MODERATE SNOW THROUGH THE MIDDLE OF THE WEEK. HOWEVER…THE MOST SIGNIFICANT SNOWFALL IS EXPECTED MONDAY INTO EARLY TUESDAY…WHEN PERIODS OF HEAVY SNOW WILL BE POSSIBLE. SNOW ACCUMULATIONS ACROSS THE WESTERN MOUNTAINS MONDAY INTO TUESDAY MORNING SHOULD RANGE BETWEEN 5 AND 10 INCHES…WITH HIGHER AMOUNTS ON SOUTHWESTERN FACING SLOPES. THE WESTERN VALLEYS AND BASINS COULD SEE SNOWFALL BETWEEN 1 AND 3 INCHES DEPENDING UPON HOW QUICKLY THE RAIN CHANGES TO SNOW MONDAY NIGHT. PEOPLE WITH ANY PLANS TO TRAVEL OVER MOUNTAIN PASSES SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS… ESPECIALLY AS A POTENTIAL STORM IMPACTS THE WEST MONDAY INTO TUESDAY.  – NOAA 

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