Forecast Discussion for SEW NWS Office
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NOUS46 KSEW 161547
PNSSEW

Public Information Statement
National Weather Service Seattle WA
750 AM PST THU FEB 16 2017

...How is Our Mountain Snowpack Doing?...

After a seemingly wet fall and quick start to the mountain snowpack
and ski season, how is our mountain snowpack doing at this point in
mid-February? Let`s take a look at the latest statistics.

Snowpack data from the NW Avalanche Center as of February 15th
showed the Olympic and Cascade Mountain snowpack was averaging about
95% of normal. The range was from 87% of normal at Paradise on Mt.
Rainier to 104% of normal at White Pass.

Snowpack measurements from the National Resources Conservation
Service (NRCS) showed the water equivalent in the Olympic and
Cascade Mountain snowpack was averaging about 104% of normal for mid-
February. In addition, precipitation totals were about 110% of
average in the mountains.

The wet October plus the wet first half of this month have been
countered by a much drier than normal January and quite warm
conditions with high snow levels in the past week, leaving the
mountain snowpack depth just under average for mid-February.

In the lowlands, October was one of the wettest months on record in
Western Washington and got the water year off to a fast start. Yet,
the next three months were a bit drier than normal particularly in
January when precipitation amounts were only about 50 percent of
normal.

Thus far this month, February has been much wetter with many
locations already exceeding the average for the entire month. For
the water year - October to present, the Western Washington
lowlands are running about 100 to 130 percent of normal.

What is ahead for the test of this winter, spring and summer? The
latest National Weather Service (NWS) Climate Prediction Center
outlook released this morning indicates the rest of this winter has
even odds on above, near or below average temperatures and
precipitation.

The outlook for this spring - April, May and June, suggest equal
chances of above, near or below average temperatures and tips the
odds to above average precipitation. Looking ahead to this summer,
the outlook for July, August and September offers increased odds on
above average temperatures and below average precipitation.

At this point, it looks like there is plenty of snow to keep
mountain winter sports going well into the spring and the region`s
water supply for this summer should be in good shape. As always, for
the latest Western Washington weather forecast information, visit
www.weather.gov/seattle/ plus your local NOAA Weather Radio station
and NWS Seattle social media on Facebook and Twitter.

$$

Buehner

www.weather.gov/seattle/

NWS SEW Office Area Forecast Discussion