Wednesday, December 17, 2014

Washington Cascades Weather- Extended Outlook

Updated 12-16-2014

We have some weather systems moving in late this Thursday  through the upcoming weekend so we should get some snow (finally) especially on this Thursday night and Friday at close to 4000 to 5000 feet. Then on later on Saturday and into early Sunday we get a warm up with snow levels over 6000 feet (sorry- skiers).

Then the extended forecast for 12-24 to 12-30 indicates below normal temperatures with normal to below normal precipitation. With this pattern we will get some ridging at times (see map and click below). This pattern is  not good to build the snowpack.

Many of the extended seasonal models continue to show that an El Nino (above normal sea surface temperatures of the coast of South America) forming this winter. Right now we have neutral conditions. On the average when we have an El Nino  the Pacific Northwest usually (but not always) gets above normal temperatures and below normal precipitation.

Click here to view 500 mb map (18,000')

 Snow on the ground as percent of normal

From NW Avalanche Center as of 12-15-2014: Mt Baker 10%, Stevens Pass 25%, Snoq Pass 9%, Paradise 32%

Cloud Seeding = More Snow?

Cloud seeding has been used for many years to increase precipitation with mixed results in the past. However is it working now? Click here to see if cloud seeding works

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