There is one thing concerning the western facet of the Olympic Peninsula that brings large bushes down.
In 2018, a swath of old-growth bushes fell close to Lake Quinault from an intense mountain-wave rotor circulation, one thing described in a paper I wrote with some UW graduate college students. There had been some we did not persuade, together with repeated claims of UFOs and army intervention.
And on Saturday morning, round 4:45 AM, a weak twister introduced bushes down alongside the Moclips Highway, between Moclips and Lake Quinault (see image taken by the Quinault Assistant Fire Chief).
This occasion occurred when a really robust slender chilly frontal rainband made landfall on the coast. And we now have an excellent view of the motion due to the National Weather Service Langley Hill radar, which was put in in 2011.
Below is radar picture at 3:19 AM on October 10th. Precipitation depth is proven by the colours, with purple indicating very, very heavy rain. You discover the wavy line of purple colours? THAT is a slender chilly frontal rainband—where the frontal properties are tremendous concentrated with heavy rain, excessive winds, sharp wind path modifications, and excessive turbulence. Really nasty.
By 4:38 AM, this line of intense precipitation and climate contrasts has simply made landfall, with heavy precipitation simply inland from the coast.
The robust upward movement with the heavy convection alongside the road, coupled with robust wind shear, resulted within the formation of a weak twister, most likely at EF-Zero or EF-1 ranges (the National Weather Service will undoubtedly ship out a workforce to find out this).
The Langley Hill radar is a Doppler radar, so it could possibly see rotation, and in reality, there was some indication of rotating airflow with a few of the convection. Below is a picture from the fantastic Radarscope app (supplied by the NWS twitter feed) for 4:38 AM.
The prime picture exhibits reflectivity on the lowest radar degree, which supplies a measure of the precipitation depth. You can see an space of heavy precipitation (reds once more).
But have a look at the second picture that exhibits the rate of the airflow in direction of or away from the radar. Do you see there may be an space of nice colour distinction between white/gentle purple and inexperienced? Green means air is approaching and purple means going away. That distinction of colours suggests rotation. Weak, however suggestive.
The preliminary analysis of my NWS colleagues (see under) is that the occasion was an EF-1 twister with a peak wind of 90 mph and a path even of .5 miles.
Western WA will get 1-2 weak tornadoes a yr.
And so long as we’re speaking about winds, we must always all batten down the hatches for tomorrow.
A comparatively robust Pacific cyclone will make landfall north of us, as illustrated by sea degree strain forecast for eight AM tomorrow morning.
The newest Seattle WindWatch forecasts for tomorrow over Seattle exhibits robust winds tomorrow afternoon and night, with max gusts reaching 40 mph someplace within the metropolis. We had just a few bushes down and energy outages over the weekend– I count on extra tomorrow.
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