By Weatherflow meteorologist Shea Gibson
Washington and Oregon have been seeing some very strong winds and dangerous conditions since yesterday and into today. The strong wind belt aloft known as the “North Pacific Jet” (NPJ for short) is taking a dive down over the region with a surge of energy from ex-Typhoon Songda, one of the northernmost super typhoons on record. This is bringing some rather nasty weather their way now – with stronger activity to come. It is their version of the powerful Nor’easters we see on the East Coast at times, but these have a different dynamic setup over the northeast Pacific.
Here is Super Typhoon Songda at its strongest profile. It peaked out October 11, with JTWC reporting (1 minute sustained) winds of 150 mph and pressure at 925 mb. Songda ultimately raced to the NE and got pulled up along the NPJ:
Current jet stream at 250mb (~34,000ft) that Songda was pulled into. The downstream disbursement of energy (or correlation) of one phenomena to another distant location is known as “teleconnection”. The storm we are seeing come together now is a result of that relationship.
Here is a sped up version of Songda’s track:
One powerful upper Low is moving over now (as of 1730 UTC)…with another stronger upper Low slated to come in behind it tomorrow.
You can see the jet stream speeding up aloft with an atmospheric river diving down it – this will instigate faster progression of the next storm.
And a chilling video to go with it!
Wind speeds will be reaching possibly in excess of hurricane force speeds in gusts for many spots (especially at the higher elevations). Right now, winds are gusting pretty high around the area. Some locales are seeing winds come down…for now.
Pressures are already below 1000mb for most spots now (5PM PDT).
Batton down the hatches over there Washington and Oregon! We hope everyone is ok after this one passes. We’ll keep up with the unfolding event over the next 24-48hrs.
Sources: Digital-Typhoon.org , Earth.nullschool.net, Twitter, our own Datascope products with WeatherFlow, Inc. , Dr. Ryan Maue of WxBell Analytics , Weather Prediction Center , NOAA GOES West, NWS Portland on Twitter, Jim Cantore on Twitter from The Weather Channel, AcaFeLLas, NWSChat LSR reports , SFSU Meteorology , RAMMB CIRA Colostate