Storm Wrapping Up: 40mph Gusts In Valley and 70-90 Coastal Mountains

August 29, 2015

11:45am…

Highest gust in our viewing area was 90 mph on Meares Hill (around 1400′) just west of Tillamook.  Is it really August?  This is crazy to see gusts 40+ all over the place here in the valleys in late August.

Updated numbers…increased speeds this hour are in bold.

COAST

  • Cape Disappointment 61 70
  • Astoria 45  62
  • Cannon Beach 60
  • Garibaldi 61  74
  • Tillamook 38 46 48
  • Oceanside 77
  • Pacific City 65 68
  • Lincoln City 52
  • Gleneden Beach 53  56
  • Newport 58
  • Waldport 59
  • Yachats 56

COASTAL HILLS & OTHER MTNS (1,000’+)

  • Naselle Ridge (SW WA) 85
  • Megler Hill (SW WA) 78
  • Meares Hill 90
  • Mt. Hebo 76
  • Rockhouse RAWS 59
  • 3 Corner Rock (Gorge) 68

METRO AREA

  • Portland Airport 37 41 43 at 11:08am (39 mph was previous all-time August gust)
  • Troutdale 35  36 38 44
  • Corbett 34 43
  • Scappoose 30 33
  • Ridgefield 37 41
  • Vancouver 25 37
  • Forest Grove 31  36 38
  • Hillsboro 35 39
  • McMinnville 32 35 38
  • Aurora 32 45
  • Scotts Mills 36 40
  • Estacada 35 38
  • Salem 35  36 39
  • Happy Valley 33  39
  • Chehalem Mtn 48

For the weather geeks like me, a few thoughts for future forecasting:

  • Peak pressure gradients were around 9 millibars EUG-OLM, 10.0 OTH-AST, & 18.3 OTH-UIL.  That last one is very strong even in mid winter!
  • Lowest pressure of the low center appeared to be around 986 millibars, a bit stronger than models (even mesoscale models) forecast.
  • 12 hour forecast from GFS & ECMWF seemed to be a bit too far offshore and a little weak too.  Low came onshore just north of Forks, or at least just passed over the extreme NW tip of Washington.  Mesoscale models were better on placement on depth.  Surprisingly, even the NAM did pretty well.
  • For a storm that was totally out of season, models and forecasts turned out really well!
  • PGE says 27,000 were out of power at the height at the peak of the wind.
  • It was an unusually long recovery period power-wise.  Some folks didn’t get power back for 36+ hours.  Not sure if that was due to lack of manpower or too many small outages slowing things down?

10am: All-Time August Wind Gust At PDX

August 29, 2015

PDX just had a gust to 41 mph at 9:52am, the strongest ever recorded in the month of August.  I see about 150 power outages in PGE territory.  Actual number of customers out isn’t very high (just a few thousand), but lots of small outages

Updated numbers…increased speeds this hour are in bold.

  • Cape Disappointment 61 70
  • Astoria 45  62
  • Cannon Beach 60
  • Garibaldi 61  74
  • Tillamook 38 46
  • Oceanside 77
  • Pacific City 65 68
  • Lincoln City 52
  • Gleneden Beach 53  56
  • Newport 58
  • Waldport 59
  • Yachats 56

Wind gusts now right where we have been expecting in the metro area:

  • Portland 37 41 (39 mph is all-time August peak wind gust)
  • Troutdale 35  36 38
  • Corbett 34
  • Scappoose 30 33
  • Ridgefield 37 41
  • Vancouver 25
  • Forest Grove 31  36 38
  • Hillsboro 35
  • McMinnville 32 35
  • Aurora 32 45
  • Scotts Mills 36
  • Estacada 35
  • Salem 35  36 39
  • Happy Valley 33  39
  • Chehalem Mtn 48

Here’s a pic of a 77 mph Maximum anemometer peak gust at Oceanside.  Thanks to Adella MacDonald

11893729_952659144792972_7736405694998475294_o (1)


9am Update: Ramping Up in Metro Area

August 29, 2015

Strongest wind gust on the coast is 74 mph at Barview Jetty CG station near Garibaldi.  Speeds have picked up in the valleys over the past hour, and a few stronger gusts along the northern coast of Oregon too.

  • Cape Disappointment 61
  • Astoria 45  62
  • Cannon Beach 60
  • Garibaldi 61  74
  • Tillamook 38
  • Pacific City 65
  • Lincoln City 52
  • Gleneden Beach 53  56
  • Newport 58
  • Waldport 59
  • Yachats 56

Wind gusts now close to the speeds we have been expecting in the metro area:

  • Portland 37  (39 mph is all-time August peak wind gust)
  • Troutdale 35  36
  • Scappoose 30
  • Ridgefield 37
  • Vancouver 25
  • Forest Grove 31  36
  • Hillsboro 35
  • McMinnville 32
  • Aurora 32
  • Scotts Mills 36
  • Estacada 35
  • Salem 35  36
  • Happy Valley 33  39
  • Chehalem Mtn 48

We should be near the peak wind now; definitely after 10am the speeds should drop off in all locations as the low zooms off to the northeast.

Fire News This Morning:

A decent part of the city of Prairie City (just east of John Day) has been evacuated due to the Canyon Creek Complex surging down the north slopes of the Strawberry Mountains.  I see wind gusts over 50 mph right now over there from the south.  Not a good situation with no rain to help out.  You can see a nice progression map of the fire over the past few days:

2015_08_29-08.34.28.976-CDT

And the latest on the incident http://inciweb.nwcg.gov/incident/article/4495/28442/

Chief Meteorologist Mark Nelsen

 


8:15 am Saturday: Storm Arriving

August 29, 2015

This storm has not disappointed along the coast…note the peak wind gusts as of 8am.  Many of these just occurred so we might see a few go a bit higher.  I see the HTC Relay folks moved the finish line off the beach as tents/equipment started moving around:

  • Astoria 45
  • Cannon Beach 60
  • Garibaldi 61
  • Pacific City 65
  • Lincoln City 52
  • Gleneden Beach 53
  • Newport 58
  • Yachats 56

Inland, where we have been expecting wind gusts 35-45 mph, wind is just getting going.

  • Forest Grove 31
  • Aurora 32
  • Salem 35
  • Happy Valley 33
  • Chehalem Mtn 48

Those are strong wind gusts for August!

Check out the satellite image from earlier this morning, a heck of surface low:

and the Ocean Shores radar shows the low moving quickly up the coastline.  Appears to already be west of Long Beach.

codnexlab.NEXRAD.LGX.N0Q.20150829.1520.012ani

I have to admit, I like having a wind event (or storm) with some sunshine and temperatures in the 70s.  You can clean up the yard in shorts and t-shirt afterwards!

A few of the overnight showers contained lightning.  I woke up to a couple flashes (but no thunder) and I see 2-3 strikes in the metro area.  Must have been quite a bit of cloud-to-cloud action since some of you say you saw lots of flashes:

lightning3

Chief Meteorologist Mark Nelsen