Thursday: Hottest Day In 6 Years

What a scorcher today; textbook “extreme heat” here in the lower elevations of southwest Washington and northwest Oregon.  Easterly wind through the Gorge and some over the Cascades gave us the extra heating to pop temperatures into the 100-105 range in the western valleys.

PLOT_Highs_ORWA

PLOT_Highs_Metro

The numbers at Hillsboro, McMinnville, Salem & Eugene were record highs for the day.  Check out those coastal temps too; not hot but nice and warm.

Here in Portland it was the first 100 degree day since August 2012, and the hottest day since the 106 during the heat wave in 2009.

MarkHot_HeatWave_100DegreeDays

Unfortunately, if you don’t have air conditioning, it’s going to be a warm night.  At 10pm it is still 87 in Portland, which is 4 degrees warmer than last night at this time.  We’re going for a low of 66 which would once again tie a record-warm low temperature; we did that last night at 63 degrees.

What changes tomorrow?  The atmosphere overhead doesn’t cool at all, but we lose the offshore flow.  In fact a 10-20 mph westerly wind returns to the Gorge in the afternoon.  The loss of the offshore flow (but no onshore flow) should drop our temperatures 3-4 degrees.  So…probably still a high of 100 degrees once again.  We haven’t seen back to back 100 degree days in 6 years either.

After that, a gradual cooldown over the weekend and then all models put us back into refreshing onshore flow and the hot ridge goes away next week.  Back to normal temps (around 80) or maybe even a bit cooler at times.

Chief Meteorologist Mark Nelsen

44 Responses to Thursday: Hottest Day In 6 Years

  1. Dane says:

    Love all the good weather info. Curious why Fox12 and Kgw both never show the southern part of the state? Medford Ashland Roseburg etc. some of us have family and interests related to the southern state. Last I checked we have a huge population past Eugene. Cheers! Keep up weather info.

    Signed Looking for lost southern cities of Oregon

  2. Boring Oregon says:

    Mt.Hood is going to get a public iindecency fine if it doesn’t cover itself up. Also, Mark, on your 7-day forecast there seems to be a little overlap with the cloud icon on sunday night into monday and it looks like a gliwing cloud. Will there be glowing clouds Sunday Night?

  3. Lee Wilson says:

    We hit 109°F.
    Deadly to some with hypertension and to the medically frail.
    Deadly to animals as well.
    Been cooped up inside almost all day save for potty breaks for the dog.

    We have boxes stacked up on the window to block the sun..and its a big window so there is a lot of boxes.

    at least we’re not sweating like a race horse at the Kentucky Derby .

    any one up for a play? Mid Summer’s Night Dream sounds appropriate? My favorite Character was Puck.

  4. WEATHERDAN says:

    101 at 3:00 PM. Humidity is down to 13% and we have Northeast winds. Another day at 105 seems reasonable. Next Wednesday we drop to the low to mid 80,s with sunny skies. Perfect early August weather. Please watch out for your pets in this hot weather. Make sure they have a cool place to stay and have plenty of water. After last July who would have thought this one would be even hotter. Peace.

    • Lee Wilson says:

      And for the elderly and medically frail .
      Peace…and don’t be frying eggs on the side walk lol.

      Oh, remember asphalt can burn you dogs paws as well as kids tender skin on their feet.

      It black so need we say more?

  5. runrain says:

    96 deg at 2pm, 1 degree warmer than yesterday at this time. Hmmmm…..

  6. David B. says:

    It’s hot up this way, though you in the Willamette Valley would scoff at a high of 88 being “hot”. The humidity seems nice and low this time, still cooled off to 56 by this morning. Getting a break from the heat like that at night really takes the edge off a hot spell.

  7. WEATHERDAN says:

    94 at 1:00 PM. That is 2 degrees warmer than this time yesterday. We should hit somewhere between 103 and 105. 104 is the record set back in 1965. Some mid and high level clouds in Southeast quadrant. This weekend should be more humid. After a week of more normal temps. The heat should start to return around the 15th. Not a monster heatwave but more upper 80,s and lower 90,s. That chance of showers around the 7th and 8th has all but disappeared. So cooler by midweek but dry then more heat around mid month. Peace.

  8. Farmer Ted says:

    We had a high temp. here in Lower Logan of 105 degrees, not near the record temps. hit in 1981 and 2009 of 110 degrees here on my farm.

  9. W7ENK says:

    Topped out at 104.1 yesterday in a last minute rally just after 6pm. Originally thought my 5-ish temperature of 103.9 would have been it, because by the time I got home at 5:30 it had dropped back down to 102. A cool and refreshing 66 inside when I walked in the door! 🙂

    I could see that pyrocumulus cloud from Milwaukie yesterday, I understand it was visible from Vancouver, WA. That’s roughly 200 miles away… incredible!

    Had two power disruptions in my neighborhood yesterday — one around 4pm, power out for about 30-45 seconds, the other around 9pm, power out for about 45 minutes. Neither seemed to affect my house, thankfully. With similar temperatures again today, power failures could likely be worse this afternoon. Please keep in mind, if your power goes out, unplug your AC (if you can) so it doesn’t kick on at the exact same time as everyone else’s everything else when power is restored. That sudden inrush current — trying to load up all those motors and compressors simultaneously — puts a huge stress on the grid and can actually cause more harm, leading to larger, more widespread failures. Maybe turn most everything off at your breaker panel and leave one light on in the room you’re in so you know when power is restored, then go and turn everything back on after the fact. Your power utility will be thankful, and you lessen your risk of damage to your electronics when that inrush current hits.
    http://en.wikipedia.org/wiki/Inrush_current

    Keep tabs here: http://www.portlandgeneral.com/safety_outages/outages/outage_updates/outage_map.aspx

    • Farmer Ted says:

      My friends, we sure do the darndest to needlessly complicate our lives.

    • W7ENK says:

      We do?? I guess I don’t follow…

    • David B. says:

      Good advice. I always make a point to turn off or disconnect sensitive electronics if there’s an outage. Don’t have A/C myself; the only compressor in the house is in the fridge.

    • Are you talking about that line of clouds I saw on the horizon looking south from Longview around sunset

    • W7ENK says:

      Yes’suh. Thunderstorm tops estimated around 42,000′ — the fire was basically creating its own stationary, self-sustaining thunderstorm. No wonder it grew from 0 to 6,000 acres in 6-1/2 hours. 0% contained. No updates since 8:15pm last evening.

    • runrain says:

      Also a big one (18,000 acres) in No. Calif near Lake Berryessa that’s raging. With all the drought down there, where are they getting all the water to douse the flames? That right there has to be exacerbating the drought situation for them.

    • Lurkyloo says:

      Spent many summers at Berryessa growing up. That area is dry as heck during the summer, even in a rainy year. Scary.

    • runrain says:

      I used to live in Novato (Marin) and spent time at Berryessa and Clear Lake. There are a couple of fires going up there right now. Those areas and the Sonoma/Napa Valley’s always got dry in the summer. Russian River is a main source of water for that area and it has to be really low.

    • Lee Wilson says:

      Yup, I run a generator when the power goes out. I also been subbing with solar to “lesson the burden”.

  10. runrain says:

    Morning temps are perfectly mirroring yesterdays, with the exception that humidity levels are slightly higher.

  11. Lee Wilson says:

    Hey, I need the sun for solar but at that high of temps I lose power …Solar panels do not like high temps..lol..

  12. Paul D says:

    I’m curious: so we routinely have 20 over normal temperatures, but how often do we have 20 below normal? Maybe in the winter, but I doubt it ever happens in the summer.

    • Paul, I don’t live in or near Portland, but I’ll saythe last time you may have had a consistently cool summer may have been in 1993. Just guessing, but try checking sometime in the 90’s. anyway.

    • Joshua says:

      Yesterday was 20 over normal, but I would say we have had tons of 10 over normal realistically. That’s like 72 or 73 for the high for the equivalent on the cool side. Very few of those this summer for sure.

    • Paul D says:

      Roland: thanks for the tip! I looked up Hillsboro June-August 1993, and it was wonderful! 60’s and 70’s in the summer! Wow….those were the days….

    • WEATHERDAN says:

      Since 1990 these are the coolest Summers in Salem 1993, 1996, 2000, 2010, 2011. These Summers all had less than 60 days over 80. Similar Summers between 1950 and 1989 are 1953, 1954, 1955, 1957, 1959, 1962, 1963, 1964, 1965, 1968, 1971, 1976, 1977, 1980, 1981, 1983, 1988, 1989. Peace.

    • David B. says:

      One of the summers we had in the 1990s in Seattle was a real “bummer summer.” I think it was 1993. I remember using the fireplace multiple times in July and August to take the chilly damp edge off. I believe Seattle had some days with highs in the upper fifties that July. It was basically one rainy spell after another, with a brief and HOT heat wave worked in (that ended suddenly with a good dousing of rain).

      We (where “we” is anywhere east of the immediate coast but west of the cascades in both OR and WA) can easily get 20 or more degrees below normal during arctic blast conditions in the winter. A low of 12 on a January day with a normal low of 36 is 24 degrees below normal, and that sort of thing has happened more than once. (Or days with highs in the 20s when normal highs are in the 40s.)

    • W7ENK says:

      To add to what David just said: Negative anomalies of >20 degrees happen in Winter (D-J-F) roughly as often as positive anomalies of >20 degrees that happen in Summer (J-J-A). In other words, we’re about equally as likely to reach above 100 during Summer as we are to reach below 20 in winter.

      Everything balances out in the end…

    • Thanks for responding as well, Paul. I keep records of observations in my area (Vancouver BC) going back to the mid-70’s. We had a cool summer here in 1993, so I made a calculated guess that it was similar where you live. July that year failed to reach 80F for us: That’s the last time since I’ve seen a July stay below that temperature.

    • Bob Bales says:

      I remember one summer, I was visiting Seattle on Seafair weekend. I think it was 1995…definitely not 1993. Back then, they still ran salmon fishing charters from the waterfront. I booked a trip for Seafair Sunday. Forecast was morning clouds with a high of 70. That was the weather I was prepared for. However, it ended up raining with a high of 48. (!) I’m not a coffee drinker, but I was that day — it was the only warm thing on the boat.

    • Bob, I believe you that it may have been in summer 1995 when you had that cold day in Seattle. That was a cool,cloudy summer as well up here- particularly in August 1995.

  13. WEATHERDAN says:

    79 at 11:30 PM. 105 is predicted for Friday. Which is what it was today. July of 2015 will go down as the warmest month ever in Salem’s history. We should average a little over 74 degrees beating out July of 2014 but a couple of tenths of a degree. As for the monthly average maximum August of 1967 was 91.0. July of 2015 should be in the number 2 spot at about 88.5. Last July was 87.5. The average July for Salem is about 83. So we were a whole lot warmer than normal. My guess for August is about 86.0. Still a hot month just not as much as July. Peace.

  14. timbers15 says:

    Believe it or not, I am looking forward to rain and cool weather!! When fall starts?

    • Paul D says:

      Fall? What is this Fall you speak of? It sounds delightful.

    • tygrrlilley says:

      I live for the rain and cool/cold weather, so this heat is killing me…Fall can’t arrive soon enough. On the upside, I’m finally able to get my truck’s a/c fixed today…WOOT!!! =D

    • Paul D says:

      Park in shade!!!!

  15. Tyler Mode in Battle Ground says:

    The major difference between this in 2009 is the lack of humidity! I remember a low of 74 one of those mornings back in 2009, that was nuts!

    • Lee Wilson says:

      I remember further back some time 8th the 80, so where we had to bathe our horses and animals to prevent heat stroke.

      The staff at the fair grounds had to install huge fans to cool the in door arena.

      Tip, if you don’t have A/C, take shower and or.cool off in the bath.
      It will save your life.

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