A Dry Record On The Way?

May 14, 2012

We’ve seen 10 dry days in Portland as of this evening, and we likely have 5-6 more.  Did you know we’ve never seen more than 15 consecutive dry days in May?  That would be this coming Saturday.  If we make it all the way through Sunday dry, we’ll have a new May record.  I’m especially proud that I can blog about this before Steve Pierce (a regular here and Oregon AMS President) has a chance to put out a press release about it.

A pretty good marine push this afternoon and evening has dropped temperatures much more quickly than last night.  At 1900′ on the KPTV tower in the West Hills, it’s running about 11 degrees cooler at 9pm versus Sunday night.  So after the 3 days in the 80s, we’ll be about 10 degrees cooler tomorrow (upper 70s).  Then a bit more cooling Wednesday, but little in the way of cloud cover.  Our RPM keeps insisting that tomorrow’s morning low cloud cover will be mainly south of the Portland Metro area and won’t last long; we’ll see.

A weak upper level trough passes through the Pacific Northwest Thursday and Friday, bringing below average upper-level temps and much cooler weather down here.  Still, there appears to be very little moisture for rain.

After brief ridging this coming weekend, models are all pointing to a very wet week next week.  Of course that’s the week leading to Memorial Day…hmmm, sounds familiar

Speaking of Memorial Day, I received this picture from Dave Shiffer today:

It’s Trillium Lake still ice-covered on Saturday.  He says the road was plowed to the dam, but campground and boat still under maybe a foot or so of snow.  I was surprised, considering SNOTEL sites show little or no snow there.  I suppose Sunday, Monday, and now Tuesday up around 70 or so will melt that ice real quickly.  Looks to me the campground will probably be open for Memorial Day Weekend (2 weeks to go).  One more reason I avoid camping in the mountains Memorial Day…too cold, sometimes wet, and often snow left lying around.  I’d rather wait until mid-late Summer.

I’ll be on vacation the rest of this week; time to stain the decks and go camping, so no posts again until next Monday.  Unless I get really bored…

Chief Meteorologist Mark Nelsen


Hot In Metro Area, Cooler to North & South

May 14, 2012

Check out the 4pm temps…85-90 in the middle of the metro area, but only around 80 to our south:

We saw what we call a “marine push” (cooler ocean air) up the coastline and into the southerly Willamette Valley this morning, but it only made it up to about McMinnville to Woodburn.  Now we have a push of cooler ocean air coming up the Columbia River.  A gusty northwest wind has arrived at St. Helens, Scappoose, Sauvie Island and into central Cleark County.  In between the warm air has stayed put.  Vancouver is up to 88 at this hour!

We’ll all see the cooler northwest wind the next 3 hours in the metro area; this signals the end of our little May “heat wave”.  Although heat wave is a bit strong wording since we didn’t make it to 90 (probably).

Chief Meteorologist Mark Nelsen