WARNING: Hurricane Ana To Bring Impacts To Pacific Northwest On Tuesday

Former Hurricane Ana is expected to bring impacts to the Pacific Northwest and there may be severe weather to contend with.  Get all the details as you read along.

Ana has weakened to extra-tropical and now is just a low pressure center to the west of Vancouver Island.  However, such a system will remain to bring impacts on the Pacific Northwest on Tuesday.  A storm front; clearly seen on water vapor satellite images; is moving toward the Western Oregon and Washington coastal zones.  The impacts on this will be another gusty wind event, heavy rain, thunderstorms, and yes even severe weather, with storms capable of isolated tornadoes.

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The pineapple express nature of this system will bring higher snow levels so any snow that fell on the median Cascade Range with the older systems will melt and flood concerns for the valleys would then rise.

On Tuesday morning, the brunt of the first storm moves in.  So far we’re thinking of going with increased thunderstorm activity for Northwest Oregon and Western Washington as a result of slightly steeper lapse-rates (or instability from low to mid level atmosphere).  Given the west to east flow in the upper levels, storms may produce isolated tornado risks ass well, especially with the stronger low level shear that will be present.  Given this, strong winds are also expected.

Wind conditions will be fairly normal for this time of year with fronts out of the Pacific Northwest.  Portland to Seattle, WA may reach 30 mph wind gusts on Tuesday.  Vancouver Island will have 35-50 mph wind gusts, being closer to the surface low of what was the center of Hurricane Ana.

Additional storms will hit by the end of the week, with a very powerful one (thunderstorm wise) coming for the region.  Other articles will be written.

Source:  http://www.triforceweather.com/2014/10/27/former-hurricane-ana-to-bring-impacts-to-pacific-northwest-on-tuesday/