Perfect Spring Weather Continues This Week

7pm Sunday…

I know I’m not supposed to editorialize, but I’ve been enjoying this real nice stretch of spring weather.  No real extremes and drier than normal.  What about you?  Take a look at the numbers.

1. This month has been a bit warmer than normal, but no huge departures from normal.  No “April heat waves”.  We haven’t hit 80, but lots of mild days/nights.  Two days at 70+ so far

Month Climate Temps Calendar

Most of the western USA has been warmer than normal this month as well

anomaly_30day

2. The “faucet” has just about shut off; we’ve seen very little rain in the last 10 days.  Not much is on the way for the next 7-10 days either. Unusual for late April, but not unheard of.

Rain PDX Last 10 Days

It’s interesting to see a huge gradient in monthly rainfall from dry western Washington down to a very wet central/southwest Oregon.  That’s due to the atmospheric river event that lead to flooding around the 6th-9th just to our south.  Gray/red colors are drier than average, green/blue wetter.  In fact blue is 180% of average or higher.

anomaly_precip_30day

3. Refreshing and cool nights have returned.  After lots of warm nights the first part of April, we’ve cooled back to near/below normal with more clearing.  Last night was extra cold, with lots of frost in outlying areas behind the cold front that passed through early Saturday.  Never set out your tomatoes/peppers this early in our area.  Always wait until sometime in May unless you have them protected well and/or live right in the urban areas.

PDX Observed Low Today

What’s ahead?  More of the same for at least another week.  It’s interesting to note the cool/dry air coming down from the north plus upper-level ridging just offshore is quite similar to the cold pattern in February.   Havre, Great Falls, & Cut Bank Montana were near/below freezing with snow all day today along with a strong northerly wind.  Wind chills in the teens…rough life on the Great Plains!

Satellite Surface

The pattern may be similar, but it’s late April now and the sun is far stronger.  That’s why we are seeing colder nights, but daytime highs still made it above average.  You can see the effect at 3,700′.  Lots of bare areas have appeared on the lower slopes of Mt. Hood Ski Bowl at Government Camp.  Alpine Slide is scheduled to open Memorial Day.  Clearly this won’t be one of those years when the workers are shoveling it out in June!

Live Camera Skibowl Only 2017

Ridging breaks down later this week, but most of the next 10-15 days models are showing upper-level heights in the atmosphere overhead remaining above normal.  Briefly below normal about a week from now on the ECWMF

ecmwf-namer-z500_anom-7144000

Then back to warmer (higher heights) again the first full week of May

ecmwf-namer-z500_anom-7316800

Ensemble forecasts of total rain from both GFS & ECMWF give us around 1/2″ in the western valleys of Oregon & SW Washington through the next two weeks.  That’s well below average for early May

This slideshow requires JavaScript.

But as we’ve seen in early April (with the heavy rain), and February (with cold/snow), models sometimes have trouble seeing general pattern changes more than 10 days out.  So I feel comfortable saying we will be unusually dry for another week or so, but not comfortable telling you that will continue beyond May 8th or so.

Big picture…get your decks stained, lawns mowed, gardens cleaned up, and enjoy the dry spring weather!

Chief Meteorologist Mark Nelsen

30 Responses to Perfect Spring Weather Continues This Week

  1. Joshua Lake Oswego says:

    Dude, every time I post, you are all over it. My posts are based on facts and the forecast. Yes, I exaggerated a bit about summer beginning in April. It did in previous years, but this April was mainly pleasant. If you want to live somewhere where it rains 1” in 6 months and hits 90 35 times, move to Sacramento.

    • Ken in Wood Village says:

      W7ENK always likes to belittle other people. It’s in he’s nature. I have had problems with him in the past. I have even sent an email (or two) about him. He likes to get under people’s skin because he’s so old and has nothing to do.

      W7ENK, I think it’s time you move on and stop your whining. This is one reason why I don’t come to this site much anymore is because people like you. Do you hear me Mark?? I think it’s time to clean out the garbage.

  2. Joshua Lake Oswego says:

    Forget 80… 90 next week? I believe we have yet another year where summer began in April in our hands. Gonna be a looooong summer. Brown grass cometh.

    • W7ENK says:

      April 2019 — Milwaukie, OR

      If highs in the 60s and lows touching freezing with over 4 inches of rain is too warm and dry for you, then please pack your belongings and move to the Northern Alaskan coastline. At the very least, stop with the incessant, obnoxious whining.

      • K says:

        If you read his comment, he isn’t even talking about how this month has been (but rather how the forecast looks). You seem to misunderstand the definition of incessant whining.

        • Ken in Wood Village says:

          K, read my comment above under “Joshua Lake Oswego” I don’t posts much anymore on here because I’m on a weather page on Facebook. It’s faster to post stuff there. I wish this page was a little more friendly with posting pictures and such.

          I only posted because of what W7ENK is doing (this is another reason why I’m not on this page much either, I’m tired of the BS from people like W7ENK). I have had problems with him in the past and it seems like he never learns. I think Mark needs to start cleaning out the bad people on this blog.

  3. boydo3 says:

    Locked into a summertime pattern for now…

  4. PAUL D says:

    Am I going to have to start watering my grass?!? No!!!!

  5. Tanis Leach says:

    Off topic but I need some advice from some local weather geeks:

    I’m doing a speech on significant pacific weather events on the pacific northwest and want to touch on both the 1975 Pacific Northwest Hurricane, and the 2006 Central Pacific Cyclone/Tropical Storm. Any research sites I can go to as from what I’ve noticed so far, it is thin. Thank you.

    • Roland Derksen says:

      I’m interested in knowing which “hurricane” we had in the Pacific Northwest in 1975. Can you tell me the name of it?

      • Tanis Leach says:

        It went unnamed, it’s just called the pacific northwest hurricane of 1975. Aka hurricane 12 if we do numbers.

        • Roland Derksen says:

          Thanks, Tanis- I wasn’t aware of that system being off our coastal waters at that time. September 1975 was from the first week onward a very dry and sunny month here. I only measured a trace amount of precipitation late in the month.

    • W7ENK says:

      Milwaukie

      Current temp: 65 degrees under clear skies
      Humidity: 15%
      Dewpoint: 15F

      Verified just 2 blocks away.

      It’s gonna get cold tonight.

    • Anonymous says:

      You may be interested in Wolf Read’s wind storm climatology page: http://www.climate.washington.edu/stormking/

      Note that by no means are any of these storms Hurricanes or otherwise tropical in nature. The low pressure areas may have once been “warm core” tropical , but were most definitely extratropical “cold core” systems during their intensification offshore. The north Pacific water temperatures are far too cold to support tropical development.

  6. Evan -- Cedar Mill says:

    80 this weekend?

  7. Gene says:

    Mark, I think you’re on safe ground editorializing when the weather’s this nice in April! It’s certainly great weather to get outside and do stuff in, whether it be work or play

  8. Evan -- Cedar Mill says:

    I’m waiting for some heat waves….

  9. Roland Derksen says:

    The latest freezing temperature I’ve seen is April 30th, 1986. I don’t think we’ll get it this time, but we’ve been close the last few days.

    • I was camped near Olympia over the weekend, and one of the nights made it down to 28˚F at the nearby airport. More like mid-30’s at the campsite, which was under a tree canopy. Still plenty chilly overnight! Didn’t get cooler than 36˚F at my place, though I have seen frost in late April on the island before.

  10. PAUL D says:

    Not bad at all! Enjoying the cool nights! Would like some rain to keep the grass happy, though.

  11. oldwxwatcher says:

    31.0° this morning with frost on most roofs at my location near NE 122nd & Glisan. This is the latest date I’ve seen a freeze here in several years.

  12. JERAT416 says:

    Yeah, not so bad at all!

%d bloggers like this: