First 70 Degree Day in Portland Today

4pm Wednesday

Feels like May!  Low 70s this hour at PDX, first time this year!


How convenient…today IS the average date for the first 70 degree temperature in the Rose City


This has been a well-advertised warm spell with a big upper-level ridge developing just to our west and then sliding overhead mid/late week.  We’ll probably end up around 72-73 today, and tomorrow we should add a couple degrees…maybe hitting 74-76.  Same thing Friday.  So enjoy the warm March/April sunshine…it’s time after a VERY wet winter.

Looking ahead, in general the pattern is warmer than normal for the first week to 10 days of April.  Check out the GEFS (GFS ensembles) from the 12z run showing 6 hourly temperature anomaly.  Most of the time between now and the 2nd week of April it’s above normal.  No huge “heat wave” forecast, but you can spot the current warm period and another one around Wednesday-Friday next week.


The ECMWF also shows the 2nd warm period next week, although it doesn’t last very long.  See the spike in 850mb temps on the ensembles next Wednesday/Thursday:


As for rain, models have slowly backed off on shower chances for this upcoming weekend.  Here’s another cool graphic from the WeatherBELL site:


It shows the last 15 runs of the GFS model…newest at the bottom.  That’s 3.5 days worth of model runs.  Each horizontal row is one run of the model.  Take a look up/down on Saturday/Sunday.  Note that a weak system was trying to come through the Pacific Northwest as of about two days ago.  But now it’s totally gone, thus no rain forecast for our area until Monday.  You can also see that 2nd dry/warm period showing up now next Wednesday-Friday (7-9 days from now).   You can also glean from this chart that the GFS has been very consistent showing showers in the Monday/Tuesday time frame.

To summarize:

  • Unusually warm/dry weather continues through the weekend, but the solid sunshine disappears after Friday
  • For gardeners:  an excellent chance for our soils to dry out through Sunday
  • Finish up those activities by Sunday afternoon/evening, rain of some sort is definitely back Monday/Tuesday
  • The next 10 days look pleasant and a bit warmer than normal as we head into April

Chief Meteorologist Mark Nelsen


18 Responses to First 70 Degree Day in Portland Today

  1. Paul D says:

    The trees that shade my back yard have no leaves yet, so it was rather toasty while pulling weeds this afternoon. I would prefer sunny and 60.

  2. My maximum temperature yesterday ended up at 74F. Not quite a record, but pretty close. What was particularly intresting for me was the difference of 15F with our city’s “official’ temperature of 59F (taken at the airport which is often exposed to a wind off the water in these weather conditions). Felt like summer in my neighbourhood, though.

    • Wow, that’s toasty! My high yesterday was only 64. You’re obviously in a warm microclimate. Do you perhaps live in North Vancouver up in the hills? With all that south-facing terrain and being up and away from the cool salt water I could imagine it getting significantly warmer than YVR there on sunny days.

    • Hi Rubus; No, I don’t live up in North Vancouver- actually my part of the city is called South Vancouver, but you may be partly right: I live on a plateau area (elevation 267ft) away from the water. Often we don’t get the direct influence of the sea breeze here, unless it’s a “marine push”. Also it’s an ubanized environment, so we get heating from that too.

  3. MJ says:

    Thoroughly enjoying this warm spell after so much slop the last few months. We’ll be close to breaking a record high for tomorrow.

  4. Boydo3 N. Albany says:

    Mark, I’m kinda surprised that you didn’t comment on the radar image. Gotta be the spring bird migration lighting up the radar under the clear skies.

  5. Dave in SW PDX (235') says:

    Maybe it’s because I haven’t seen a good sunset in a while, but tonight’s seemed especially orange… I wonder if the recent eruption at Pavlof Volcano has anything to do with it.

  6. Lee Wilson says:

    It was 79 here in Castle Rock Wa. I have video to back that up aswell

  7. Dave in SW PDX (235') says:

    Thanks, Mark! Hope you thoroughly enjoyed your vacation. 74° this afternoon on my home weather station – I’m ready for more!

  8. JERAT416 says:

    Welcome back Mark! We are all enjoying this nice break from the rain. Thanks for bringing the sun back with you!

  9. welcome back, Mark! Boy, what a day to have your first blog in a while. I have 73F out side up here- one of my warmest day ever in March.

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