Warmest May In 18 Years; More This Weekend

We’ve seen 3 days at/above 80 degrees and we have at least one more (possibly Saturday but more likely Sunday) on the way this weekend.

Nora 80 in May

May has been very warm, and it appears it’ll be our 2nd warmest of the past 18 years here in Portland;  the warmest since…last year!

An upper-level low offshore is going to “open up” and swing up over us Sunday night and Monday.  That means some showers return and we get a major marine push…a sort of “hangover Monday” on the way.  Ahead of that, Sunday is looking like the warmer of the two weekend days.

With the warm weather the river temperatures are sure running above last year!  This is due to lack of a melting snowpack and drier than normal spring rainfall.  I was shocked to see High Rocks water temp is running in the low-mid 60s already.  Here are some numbers compared to last year.

MarkRiverTemps_CompareLastYear3

MarkRiverTemps_CompareLastYear2

MarkRiverTemps_CompareLastYear

This weekend is also the anniversary of the Vanport Flood, when a large city (pictured)

vanportfromair1943

was erased off the map in a few hours, just miles north of downtown Portland.  I’ve written about it in a previous blog here, so I won’t go over the details again.  It’s a fascinating story; check it out if you’re new to this area and have never heard it.

Chief Meteorologist Mark Nelsen

34 Responses to Warmest May In 18 Years; More This Weekend

  1. EY (Oak Grove) says:

    Potentially a quickly growing cell around 2am moving north out of Redland/Oregon City is now bee lining through Jennings Lodge and Oak Grove. Milwaukie could potentially get hit by a thunderstorm, albeit not a strong one. Better than nothing, though.

    Windier than normal for nocturnal storms, well, windier than I remember.

    • Lee Wilson says:

      We just got missed by a thunderstorm. But we are seeing some light rain. Which is needed for the garden.

      Our tomatoes have grown fast in the last 4 days and we have some popping up 🙂

    • Lee Wilson says:

      At least we’re no like Texas with their food in an hour not like Southern California having to rip out their lawns as they turn to desert.

      And here is that cell that just missed us.

  2. schmit44 says:

    5/31/2015 Oregon (All) Temperature Summary

    Warmest:
    High:93 at MERLIN SEED ORCH(1144 ft) & LAKE OWHEE AND O(2400 ft)
    Low: 67 at BLALOK(277 ft)

    Coldest:
    High:53 at Port Orford (US(90 ft)
    Low: 35 at CROW FLAT (5172 ft )

    Largest Diurnal Change: 40 degrees
    CROW FLAT (75/35 ) (5172 ft )

    Heaviest Rainfall:
    0.70″ at IMBLER(2749ft)
    0.62″ at MT. WILSON(4002ft)
    0.60″ at MT. YONCALLA(1822ft)
    0.41″ at Pendleton, Easte(1493ft)
    0.36″ at Meacham(3724ft)
    0.32″ at EW6078 La Pine(4259ft)

  3. Eugene Dave says:

    Lots and lots of thunder and lightning down here in Eugene. Easily in the hundreds of strikes, although most have been to the south or west. Been going on for over an hour. Best lightning show I’ve seen in years.

    • Dave in south Salem (500') says:

      Got to us about quarter to one. Still happening. Lots of water too. This counts as June rain I believe…

  4. Tyler Mode in Battle Ground says:

    What a sunset tonight! Instability made for a nice evening.

    • Lurkyloo says:

      Tyler, I find it really odd how you can capture all the beautiful pictures that you do. You have a superpower of some sort, I think?

    • Tyler Mode in Battle Ground says:

      Haha no. I don’t post all of the times things dud out!

      I left a get together early because I thought this might be a nice sunset!

    • Benjamin (West Salem) says:

      Very nice pics!!!! I’m hoping for a good light show tonight!

    • boydo3 N Albany says:

      Perfect!

  5. W7ENK says:

    Lots of ACCAS exploding in all directions around The Dome. Somebody other than Milwaukie (and probably Portland) may see some lightning overnight…

  6. Hal in Aims says:

    may be getting a bit serious just on the other side of the hill in places…….

  7. runrain says:

    Careful what you wish for. 88° for the parade on Saturday, and 92° on Sunday! This is getting serious.

    • PurpleHaze says:

      Reminds me of the late 90s when there was one really hot year.

      We went to the Rose thing three times and the first time was really hot outside while the others were cloudy and one of them was actually light rain the entire time.

      On the hot weather year in particular I remember touring navy ships going up and down and to each ship. There was no air conditioning so it was miserable after a while.

      At the parking garage we had to put up our cover over the windscreen to block the sun though the other years we didn’t have to do it.

      Do they still have those navy ships or did 9/11 prevent tours?

    • High Desert Mat says:

      The navy ships have all but disappeared thanks to 9/11. Dam that Bin Laden and all his ideologies. Kyle, I hope that you stay hidden in the darkness and shadows when the $hit hits the fan because we all know that the end is coming. Stock up on water and canned goods, this may be your last chance!!!. Goodnight all, I’m sleepy

    • PurpleHaze says:

      No I am serious. There actually was ships you could tour going into most of the rooms though of course sensitive areas were roped off but for the most part you could tour and learn about the navy ships.

      I don’t know if that still goes on though.

  8. WEATHERDAN says:

    79 already in SLE at 1:00 PM. 87 looks like a good possibility if the clouds hold off. This would beat out the 86 of Thursday for the warmest day of the years so far. We really need a good soaking of an inch or so but I think we might squeeze out .25 if we are lucky. By late Wednesday we look to be warmer and dryer and next weekend looks to be back in the 80,s. Summer has come early this year. Lawns are already starting to turn brown. Anyway enjoy your Sunday. Peace.

  9. Jason Hougak says:

    Some action starting over Clackamas County Cascades on radar. Come on we need some ⚡️storms.

  10. Farmer Ted says:

    I’m looking forward to summer and summer outdoor projects. The hotter it gets, the less clothes we have to wear, and more siestas in the shade.

  11. Jason Hougak says:

    Mt. Hood looks more like early July.
    These 80 degree days are awesome, I’d take this all summer. I’m hope we don’t have any heat waves this summer. The mountain doesn’t need it, the rivers don’t need it, the farms don’t need it and the woods don’t need it!

  12. pappoose in scappoose says:

    Relentlessly on watch for Stray Albino Donkeys wandering about!

    NATIONAL WEATHER SERVICE PORTLAND
    306 AM PDT SUN MAY 31 2015

    THERE IS A SHORT WAVE OR VORT CENTER DEVELOPING AT THE BASE OF THE OFFSHORE LOW THAT IS FORECAST TO SWING NORTH INTO OREGON TONIGHT AND
    MONDAY MORNING. THIS FEATURE WILL HELP INCREASE THE COVERAGE OF SHOWERS AND THUNDERSTORMS ACROSS OREGON INTO SOUTHERN WASHINGTON AS
    IT LIFTS NORTH OVERNIGHT. THERE IS AN ASSOCIATED 60 PLUS KT JET STREAK LIFTING NORTH INTO OREGON AS THIS SHORT WAVE MOVES IN…AND
    THIS COULD PROVIDE SOME SHEAR AND ORGANIZATION TO THE STORMS THAT DO DEVELOP. THE STRONGEST STORMS WILL PROBABLY BE EAST OF THE
    CASCADES…BUT SOME COULD REACH INTO OUR AREA AS WELL.

  13. schmit44 says:

    5/30/2015 Oregon (All) Temperature Summary

    Warmest:
    High:94 at BLALOK( 277 ft) & DW0069 Ferndale(840 ft)
    Low: 69 at BLALOK(277 ft)

    Coldest:
    High:53 at Newport(30 ft)
    Low: 41 at LAKEVIEW (4770 ft ) & CEDAR (2220 ft )

    Largest Diurnal Change: 38 degrees
    Lakeview, Lake C (81/43 ) (4734 ft )

    Heaviest Rainfall:
    0.36″ at LAGRANDE 1(3079ft)
    0.33″ at CW0732 Seneca(4665ft)
    0.33″ at EW6078 La Pine(4259ft)

  14. runrain says:

    Sunny and 82° for the Rose Festival parade Saturday??? Hmmmm. Strange weather indeed.

    • Purplehaze says:

      I remember sometime in the late 90s there was one year the Rose Festival had really warm weather and solid blue skies and it was the first time in a long time of such weather and every other year was cloudy and drizzle.

  15. schmit44 says:

    The past 34 years of June weather have provided at least one 90° day on exactly 50% of the years (17 of 34 years) at PDX. Looking at this chart one could say June 2015 has a very good chance of hitting it.

  16. Lee Wilson says:

    It Was a great day Saturday.

    I even Vented our green houses .

    We have cherry tomatoes popping up and a Romano that just popped up . both Greenhouses are doing well.

    Our garden really took off with all the sun we had . She rain will be a good thing as it will save us from having A water things , providing it gets into the soil .

  17. schmit44 says:

    5/29/2015 Oregon (All) Temperature Summary

    Warmest:
    High:96 at BLALOK( 277 ft) & MEDFORD PORT #2(1900 ft) & John Day River B(305 ft) & EW1140 Umatilla(364 ft) & Celilo, East of(225 ft)
    Low: 66 at JUNIPR(359 ft) & Celilo, East of(225 ft)

    Coldest:
    High:53 at Garibaldi(0 ft) & Newport(30 ft)
    Low: 27 at CROW FLAT (5172 ft )

    Largest Diurnal Change: 49 degrees
    CROW FLAT (76/27 ) (5172 ft )

  18. High Desert Mat says:

    Last!!

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