The Cold & Wet Weather Is Here

What a change this afternoon.  Take a look at the temperature change from 6pm Monday to 6pm Tuesday:

MarkTemp_SinceMidnightPDX

We were 23 degrees lower here in Portland!  Around noon I was doing some errands on the eastside of town, getting irritated at the lack of rain (I don’t like a bad forecast).  But that forecast turned out perfect this afternoon…what a downpour.  It was our first good soaking in about 4 weeks, very much overdue:

MarkRain_PortlandToday

The cold upper level low has definitely arrived hasn’t it?  850mb temps over Salem this afternoon were measured between -2 and -3 degrees celsius.  That’s just about the core of the cold air, so it won’t get any colder than this.  The bad news though is that the upper-low isn’t going anywhere from now through Monday (Memorial Day).  That means we have a chance for showers through the Memorial Day Weekend.  The coldest/heaviest showers will definitely be tomorrow through Friday with the coldest airmass.

If you are looking for a return to some semblance of warmer weather, think again.  Take a look at the 850mb ensemble temperature chart from the 12z ECMWF:

tseries_850t_000-360_Portland

Very good agreement that below average temperatures will likely continue for the next 10 days.  Monday and/or Tuesday will be close to average, but at that time we get into a wet westerly flow, so lots of gray.

Here’s the 00z GFS chart, very similar:

tseries_850t_000-384_Portland

So put away the shorts & flipflops, keep the pool covered, and hope your warm weather veggies can tolerate some repeated soakings without rotting.

Chief Meteorologist Mark Nelsen

25 Responses to The Cold & Wet Weather Is Here

  1. cgavic says:

    At 1, 100 ft, we had a lo of 35 and a hi of 45.

    24 hour rain tot. 3″

  2. drought this summer?? i think not….lol

  3. JJ97222 says:

    Will we break 50 degrees today?? The weather for the upcoming weekend is staring to slide even more, tarptopia in the camp grounds.

    • gidrons says:

      Amazing how fast that thing went from nothing to EF-4. I’ve seen videos of this tornado from almost every side, but my favorite is the video from just underneath it, from the guy who held his camera up through the opening in his storm shelter.

    • JERAT416 says:

      Wow! That’s way too closer than I would have been willing to be!

    • Margaret says:

      a) I appreciate his efforts but if he had been killed I would’ve had no sympathy.
      b) Impressive video but a little too nauseatingly herky jerky although I understand why

  4. Punxsutawney (aka HIOPHIL) at work by Sunset High elev ~280 says:

    Pretty average day for December / January….other than the gray started a lot earlier.

    3 degrees of warming at KHIO since 2am. During 2001 it reached 92 in Hillsboro today, double the current temp.

  5. Just 4 more degrees to go…to reach the the average low temp for the date…

  6. Over the last couple of years, May 22nd holds the distinct title of the coldest average high for the entire month.

    That trend obviously continues today.

    The warmest it’s been at my BG station on this date is 57.8.

    Right now it’s 42, raining, a wind to 15 mph, and a windchill at 38.

    I see reports of snow as low as 2,000′ at Mt. Rainier this morning.

  7. JJ97222 says:

    Weather fact,

    Tomorrow our average high temp starts the 70’s

  8. JJ97222 says:

    Payback calculator

    Last May we two great weeks of weather and it did not get nice for a month and few a days. This April and May we had three beautiful weeks so does this mean we have lost July!

  9. JJ97222 says:

    Portland’s Party orders up some great weather!

  10. schmit44 says:

    5/21/2013 Oregon (All) Temperature Summary

    Warmest:
    High:84 at LAKE OWHEE AND O(2400 ft)
    Low: 52 at BULLY CREEK RESE(2500 ft)

    Coldest:
    High:37 at Rim(7050 ft)
    Low: 18 at Rim (7050 ft )

    Largest Diurnal Change: 38 degrees
    YELLOWPINE (71/33 ) (4600 ft )

    Heaviest Rainfall:
    1.69″ at CANNIBAL MOUNTAI(1939ft)
    1.37″ at YACHTS Yachats(82ft)
    1.32″ at WILKINSON RIDGE(1346ft)

  11. I don’t care what the models say. The fact that we’ve had 3 chilly Junes in a row means we CAN’T have a 4th one! I think it’s a safe bet to guess “average” or “above average” on the June temps, IPSO FACTO….

    • chiefWright (Marquam) says:

      … we’re gonna have another chilly June.
      Sadly, there’s a finite (and larger than you might expect) probability of landing 4 in a row. Plus we had to piss off mother nature by putting the Rose Festival in June, and she has a long, long memory.

  12. Josh in Sherwood says:

    Do you think Portland gets to the record low for tonight which is 38. I think we could come close or possibly beat it assuming we get some clearing for a period tonight.

  13. TygrrLilley says:

    I am in absolute HEAVEN with this return to cold and rain!!!

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