Coldest May-July on Record in Western Lowlands

The May-July (3 month period) stats are in from NCDC…

This was the 3rd coldest late spring/early summer period on record averaged across the entire Pacific Northwest. Notice how far that last dot on the right is below the line. The last time we had such a cool period was 1954. AND, Oklahoma’s statewide July temp of 88.9 degrees was the hottest of ANY STATE FOR ANY MONTH in the USA’s record. The previous Oklahoma record was…1954!Β  Clearly a similar pattern with a cool West and hot Eastern USA that year as well.

West of the Cascades in the western Valleys (Portland, Salem, Eugene), it has been the coldest such period on record as you can see in the graph below:

Obviously we’ve had colder one or two month periods (July was only a little below average westΒ of the Cascades), the continuously below average temps for such a long period really did the trick.

By the way, this was the 4th warmest July and 4th warmest month on record here in the USA, even with a chilly Pacific Northwest.

Chief Meteorologist Mark Nelsen

75 Responses to Coldest May-July on Record in Western Lowlands

  1. Mike near Clackamas Town Center says:

    Very interesting post from Cliff Mass today about a possible double dip of La-Nina this winter πŸ™‚

  2. High 82.1Β°
    Low 46.8Β°

  3. Timmy_Supercell (Klamath Falls @ 4200') says:

  4. Runrain says:

    Enjoy the summer this weekend. After that, its OOOOOOOOOOVER!!!

    • Runrain says:

      Jesse should buy all the weather bloggers a round in celebration of this perfectly delivered summer. And after that, we can dump all our green tomatoes and 2 foot high corn stalks on his doorstep (only ’cause we love ya, dude!)

    • Kyle From Silverton says:

      And we all love you for trying to start a fight.

    • Boydo3 N. Albany 500' says:

      Looks like a trough developing for the first part of next week but then the high really balloons for some tasty summer heat. I doubt we (in my area) see much rain. It ain’t over til its over πŸ™‚

    • Mike near Clackamas Town Center says:

      @Runrain This post is a great example of how to be funny without upsetting anyone. Maybe I should have my former boss from Prosser, WA dump all of his unripened grapes at Jesse’s door step as well πŸ˜†

    • Runrain says:

      Absolutely! This is all for fun!

  5. Clear skies, light winds and dewpoints in the mid 40s should mean a number of areas drop into the 40s overnight. Some of the outlying areas could be in the low 40s if the clouds hold off.

  6. Back from my hike up to Silver Star (again). What a difference a week makes. You can already see the progress of the flowers toward fall. Also, I noticed a number of grasshoppers on this hike, a sure sign that the warm days of summer are “here” but not for long.

    I had a low of 48.5 this morning and a high of 74 so far. That’s about the average for the middle of September.

  7. Timmy_Supercell (Klamath Falls @ 4200') says:

    I just can’t remember how long it has been since I sunk my teeth into a big fat juicy pineapple….. Hmmmmm πŸ™‚

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      48hr rainfall indicates 1.50″ – 1.75″ for the central/northern Willamette Valley. Could get rough in the near future.

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      I’m usually not caught doing this…. But I had to ‘right click’ + ‘save image’ on everything from 12z GFS. Talk about savory πŸ™‚

      Reminds me of December 2007.

  8. Timmy_Supercell (Klamath Falls @ 4200') says:

    A 960mb low could already be on its way by mid month. BUCKLE UP!!!! (Look at links below ^_^ )

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      Well maybe not 960mb but a juicy one!

    • pappoose in scappoose says:

      Really like juicy ones! Bring on some storms so we can observe the new radar with the DUAL POLARIZATION capabilities in action.

    • lurkyloo says:

      Timmy, would you spell this out in English for me? Storm coming? When? Sorry, I don’t know how to read the map thingies. And I don’t understand the weather lingo very well (had to ask what albino donkeys were once, so embarrassed!).

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      By the 20th or so expect a flip flop in the pattern. But thats if this model run pans out.

  9. Timmy_Supercell (Klamath Falls @ 4200') says:

    What the ****….

    Novaugust at its best πŸ™‚

  10. a friend of min in Tulsa, OK posted on FB this morning she actually had to break out the sweatshirt this AM. got down to 68.

    i bet that felt nice for them

  11. Timmy_Supercell (Klamath Falls @ 4200') says:

    forgot to upload something else from the 31st last month…

    These are two awesome strikes of lightning that showed up very well on my camera. And slowed them down too.

  12. Jesse-Orchards says:

    Wow, the 12Z GFS looks like Fall. Only three days above 80 the entire run and a bunch of rain in in the long range, with an active jet.

    • pappoose in scappoose says:

      You popped a fun thought into my mind with that statement Jesse. How early can we get a Fall windstorm? Lets shoot for a September, blow the house off the foundation, blast. Hahaah!

    • I have looked at this run 6-7 times and its bonkers. This is the strangest run I’ve ever seen for August. Agreed?

    • 12z EURO near the end of the run shows a stronger jet gearing up near the Aleutians, so you never know. OH and maybe a t-storm pattern as well.

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      Bring ’em juicy pineapples!!! ^_^

    • pappoose in scappoose says:

      Right Timmy. Certainly would be fun to get some juicy pineapples expressed on in here! I’m sure I can find something to mix em with. Hahaah!

  13. Mike near Clackamas Town Center says:

    So what happened to the cloudy skies that was supposed to linger all day…The partial sunshine this morning is a little bit of a surprise πŸ™‚

  14. bgmike says:

    Here in nampa its 66 at 7:30 I’m going to twin falls later were the high should be around 90.

  15. A few thoughts(Weather related)

    I feel that temperature wise it has been the coldest/worst Summer of my life, but at the same time it has been very comfortable. I definitely do not miss needing to run the A/C 24 hours a day, the very warm difficult nights trying to sleep, or trying to cool the house off from 5-9 AM only needing to turn the A/C on by 10 AM that next day.

    • OH, and, since June I’d say the EURO has overwhelmingly outperformed the GFS. In fact the GFS has been horribly inaccurate beyond day 5. The GFS has tried it seems like a dozen times to build a ridge and at times you see some momentum build with several runs coming to a consensus, but only to see the EURO quickly disagree reverting to the dominant trough pattern we’ve been seeing. Then the GFS reverts back to the EURO solution. One might even wonder what’s wrong with the GFS? It has initialized poorly all Summer and been unusually unreliable. Feedback problems? Has the EURO just become that much more dominant? Not sure….

      Do you realize we haven’t even seen a Great Basin ridge yet? Nor have we seen a persistent ridge, or anything amplify yet. I keep wondering when will we begin to see the pattern shifting with higher 500Mb heights over the Great Basin, a strong, formidable ridge, the northerly jet weaker, shunted further north, and perhaps a ridge taking hold of the PNW. Looks like NEVER this Summer. I really wouldn’t hold my breath and would lean towards more of the same throughout August with some warming the last week of August to early September. We may reach 90 at that point. ….Just speculation of course.

    • pappoose in scappoose says:

      Unless I get surprised by a death ridge, this will be the first summer I’ve spent in this house, that I never used the A/C. We’re talking 20 years. Love it.

      Grass growth has slowed down, but it is still alive. The summer of green grass and resting heat pumps.

      Mostly sunny here but the clouds aren’t far off. Here comes the sun, here comes the sun…

    • Ryan (Walnut Grove) says:

      I haven’t turned on the A/C at my house at all this summer. The nights have been excellent for opening the windows and cooling everything off naturally. I’ve only cranked on my car’s A/C a couple times this year which has kept my fuel mileage up.

      I absolutely love how this summer has been playing out so far. Cloud in the AM, sunny and mild to warm by the afternoon/evening. It’s been a God send for someone that is just beginning to run in the mornings too.

      On top of all that my allergies haven’t been nearly as bad as usual.

    • Mark Nelsen says:

      No matter what a person thinks of this summer, we have to agree it’s been very comfortable. Almost any day one could be working outside and not be too hot. And once the rain finished in MID JULY, the dry weather has been nice too. If we had these cool temperatures with showers every few days it would be a totally different feel.

    • agreed mark, my friend yesterday was complaining cause it was cloudy ALL DAY here. my response: “at least it isnt raining”

      as with ANY kind of weather, it could always be worse.

    • Garron says:

      I’d call it the road runner (Euro) vs. the coyote (GFS). Every time the GFS paints a death ridge or snow storm on the canyon wall , the Euro sails right through like nothing happened, while the GFS hits the wall EVERY TIME!!! Time for the GFS to try those ACME jet stream rockets!!!!

    • Sean (Lebanon, IN) says:

      Yeah Rob, I couldn’t agree more our AC has been running nearly 24/7 for the last 3 weeks it seems (my utility definitely showed it). We just snapped our historic streak of 23 days AOA 90+. It looks like the Hot Dome should be migrating westward for the next 6-10 days (finally!) and hope for some HOT weather for you all. As we get a much deserved break from the relentless heat and humidity!

  16. Boydo3 N. Albany 500' says:

    If this were June, I’d be loving it! I bet we get a long protracted dry/sunny early fall. No significant rain until very late Oct. That’s based on a very accurate 8 Ball reading. Which at this point is just as good as any other analysis!

  17. 5:30 pm, and getting a couple spots of blue sky, even a couple rays of sunshine. wow

  18. Bill Gannon (Corvallis) says:

    INSTALLING Ninety Degrees…..

    β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘ 44% DONE.

    Install delayed….please wait.
    Installation failed. Please try again. 404 error: Ninety Degrees not found.
    Ninety degrees cannot be located. The Temperature you are looking
    for might have been removed, had its name changed, or is
    temporarily unavailable. Please try again.

    • ken says:

      They sell 90 degrees for Dummies at Borders! LOL. I am not referencing you as a dummy. Im sure you get the joke. I like yours πŸ™‚

  19. ughh, this is depressing, solid clouds, cool wind, 61 degrees.

  20. This is my coldest temp so far this month at 1 PM. It’s 60.5 degrees and completely cloudy. My coldest high so far this month is 70.4, and if it doesn’t clear in the next couple of hours, that number could be challenged.

  21. jbpdx says:

    Going out on a limb here (a strong limb), and it’s only the 9th of the month, but August will be the 7th month in a row with below average temperatures for Hillsboro. So far 6 of 8 days below average this month. And July was 4.4 degrees below average overall, a significant departure from normal.

    As for 1954, was that an anomaly or were there several (or even 2) years in a row with similar statistics? Because we’re already in the middle of a trend.

  22. Timmy_Supercell (Klamath Falls @ 4200') says:

    Interesting facts when I was watching TWC a little while ago.

    Severe Heat / Drought Statistics – August 9 2011

    92% of Texas is under severe to extreme drought

    11% of the United States under exceptional drought

    Dallas, TX reached over 100F for 39 consecutive days, breaking a 30+ year record.

    • lurkyloo says:

      Yep, they are hating it! No water, no crops, no feed for their cattle. They are having to sell off their herds because they can’t feed them. So sad. And 40 days of 100 degree temps? No thank you. I looked at the weather for OK yesterday (Tulsa, I think) and it was 104 with a heat index of 107 at 11am. Makes me feel so lucky to be here … even if our summer has been less than desirable.

  23. jonathan says:

    not shure if my last post worked. does anyone know when i should be able to see the aurora borealis here in anchorage?

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      I would watch the solar wind speeds given at the top left corner of this page I linked below, watch for speeds above 600 km/sec for a healthy chance at seeing the Aurora:

    • Timmy_Supercell (Klamath Falls @ 4200') says:

      And the image above shows the Auroral Activity Level. Watch for numbers in the 9/10 range for the best chance, sometimes 8 is good but does not occur as often.

  24. jonathan says:

    anyone know when i should be able to see the aurora borealis here in anchorage,ak?

  25. bgb41 says:

    Well i have seen 92,93,94,95 last 4 days here in Angels Camp, Calif. Heading back to BG Lake on friday night. The summer weather here is simply amazing.

    • Hey my dad near Angels Camp. Low 90’s is pretty nice for August. It’s been a cool-ish summer down there, too. Long stretches of 100+ are not unusual. Oh, and if you find yourself near Mi-Wuk Villiage, check out Pie in the Sky pizza!

    • Cherie in Vernonia says:

      If it gets too hot…head up the Sierras to Lake Alpine…..nice up there…just a little further is a glistening little lake that I seem to have forgotten the name of 😦

  26. PaulB/Eugene says:


    Looking at GFS and ECMWF….out to 15 and 10 days respectively….no real heat waves…general W to SW onshore flow regime…looks pleasant…but no 90s in sight for PDX or EUG.

    Even the ECMWF long range out to 30 days released last Thurs did not have any hot weather in store for us.

    Looking at SSTs…”hot tub” of “warm” water N of HI and S of AK…while we have cold SSTs off of PacNW Coast…would surmise that is related to enhanced upwelling from onshore flow.

    Much of W Atlantic warmer than normal…should see a interesting hurricane season toward early Sept. With the days getting shorter the frying pan called the Plains states will cool off..suspect the ridging will work more toward and off of the E coast…in turn the tendency will probably develop for West coast ridging for Indian Summer conditions for us come Sept/Oct. Will probably have some 90s in Sept in PDX.

    As for La Nina….Double La Ninas…(late 1916-1918, mid 50s, mid 70s..late 90s/early 2000s)…don’t bode well for PacNW Ice Age during the second wave of La Nina…don’t have that many examples to go off on…with an N of 4 could be wrong..but am not gung ho on snow and cold as I was a year ago and look what happened (at least down low in EUG).

    Anyway….enjoying the modest cooling bill this summer…although already have three ripe tomatoes on the vine (not cherries either). By the time the 90s may come in Sept…the days will be shorter and nighttime lows will be well into the low 50s.

    Will be in Cabo San Lucas first week of Sept….may be a little hurricane action? not likely…will be in Dallas the first weekend…hoping for some supercells.

    • Jbpdx says:

      I’d like to be able to save money on the heating bill, that’s the killer…

      As for tomatoes/peppers, this is the final year planting them here…

    • Jesse-Orchards says:

      I’m going to politely disagree with your thoughts for this winter, Paul. I think we have a good chance of scoring. Weak Nina/ negative neutral winters are often good to us, especially now that we are back in the -PDO phase.

      I feel better going into this winter than I did going into last winter.

    • Kyle From Silverton says:

      You always say that. πŸ™‚

    • Kyle From Silverton says:

      I am more on line with a big windstorm and I believe Feb will be our big month which anything halfway decent happens.

    • Jesse-Orchards says:

      Don’t think I’ve ever said that before Kyle.

  27. Karl Bonner says:

    Well the last couple weeks have been much more seasonable, and the upcoming week actually looks a little on the warm side. I wonder if it would be possible to have a year when September is warmer than July, at least in the western valleys?

  28. Check out this incredible time-lapse video of lightning, the northern lights, and even shooting starts all happening at once!

  29. Joshua in Lake Oswego says:

    It really didn’t seem that cold to me at all. Maybe it’s because we have had near normal temps for a little while now and no precipitation lately. In any event, I haven’t had to put in my huge window unit AC yet this year and I love every second of it.

    • Mark Nelsen says:

      Maybe “cold” isn’t the correct word. “Cool” would be better and like mentioned above, it was really May and June that “sealed the deal”. July was just the icing on the cake. Plus the last 7-10 days of July were great!

  30. The Oklahoma fact really amazes me! But then again, states like Arizona have a lot of high elevation areas and places in Texas have temperatures limited by more regular thunderstorms/higher humidity.

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