Driest May in 20+ Years

11pm Tuesday…

We’ve only seen .59″ in May so far and it appears we probably won’t see anymore before the end of the month (Sunday Night).  It’s going to go down as the driest May since 1994.  We typically see 13 days with measurable rain this month and so far we’ve only seen 5!  Of course there were 4 days Friday-Monday with sprinkles or drizzle but that wasn’t measurable so it doesn’t count.


If we take the 3 spring months, March-April-May, this will be the driest in 8 years.  The last time we’ve been so dry was in 2007.  So keep watering, assuming you’ve started already.

There is no sign of a wet pattern either.  Although we’ll probably see some showers coming up Monday and Tuesday, the passing upper-level trough doesn’t stick around long.  Both the GFS and ECMWF 10 Day meteograms show no significant rain through the first week of June:



Enjoy the warm weather coming up the next few days.  Weaker onshore flow means more sunshine and warmer temps.  We sure don’t have a hot weather pattern with offshore flow so you don’t have to worry about that.  Highs 80-85 at the warmest.

Starlight Parade is looking good Saturday evening with comfortable late May weather.  I’ll be riding in a car with my kids and Wayne/Amy will be emceeing from a (very high) scaffolding.  All 3 parades are on FOX12 again this year, and will be for at least the next several years in case you’d like to watch from home.


Chief Meteorologist Mark Nelsen

26 Responses to Driest May in 20+ Years

  1. runrain says:

    All of a sudden, some interesting mid-level clouds moving in.

  2. runrain says:

    Some interesting mid-level clouds moving in all of a sudden.

  3. W7ENK says:

    Lots of Altocumulus Wishcastellanus floating around this morning.

    That’s… unexpected.

  4. schmit44 says:

    5/28/2015 Oregon (All) Temperature Summary

    High:92 at BLALOK( 277 ft) & JOHN DAY RIVER A(399 ft) & Hood River(571 ft) & MEDFORD PORT #2(1900 ft) & CW6811 Grants Pa(947 ft) & MERLIN SEED ORCH(1144 ft) & BROOKS(187 ft)
    Low: 63 at Celilo, East of(225 ft) & JUNIPR(359 ft)

    High:52 at Newport(30 ft) & ALAKES Haines(7979 ft)
    Low: 23 at CROW FLAT (5172 ft )

    Largest Diurnal Change: 49 degrees
    CROW FLAT (72/23 ) (5172 ft )

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

    What a beautiful summer-like day… 85.7° for my high temp this afternoon; 83° currently. Rinse & repeat tomorrow & Saturday. Great weather for viewing the International Space Station, too:


  6. Uh-oh….looks like rain is creeping into Sunday afternoon/evening now on the 7-day. Could it be enough rain to piss out our bragging rights for “Driest May in 20+ years” ?

  7. FilbertMike says:

    Over two inches of precip. in May so far in Newberg, at the base of Chehalem Mt. 1.08 inches in half an hour in one amazing thunderstorm…….

  8. WEATHERDAN says:

    80 at 1:34 PM. 85 looks likely for today. Sure feels like late June or early July this week. Now the ridge which has been over Alaska the last few weeks will be centered more over the West coast. This should allow for a warmer and drier West and less in the way of heavy rains in the Southern Plains. This pattern should evolve within the next 10 days. This presages a dry and warm June for us. This May should wind up as the second warmest May ever just slightly behind 2014. Peace.

    • Joshua says:

      Warmer and drier west? Isn’t this a comment on a post about the driest May in 20 years? Isn’t this umpteenth month in a row with above average temperatures? How much warmer and drier could it get?

    • WEATHERDAN says:

      Even though we haven’t received a great deal of rain from these upper level lows that have plagued us recently they have played a large part in the flooding rains over the Southern plains. But with more ridging in the West it should help to alleviate the heavy rainfall back there. As for how much warmer it can get for June we shall have to wait. But it is expected to be a warm and dry June out here. 81 in Salem at 3:15 PM. Lots of high clouds around. Peace.

  9. schmit44 says:

    5/27/2015 Oregon (All) Temperature Summary

    High:89 at Celilo, East of( 225 ft) & ROWENA(116 ft)
    Low: 60 at John Day River B(305 ft) & BLALOK(277 ft)

    High:42 at HOWARD Mt Howard(8150 ft)
    Low: 23 at CROW FLAT (5172 ft )

    Largest Diurnal Change: 47 degrees
    MAZAMA (74/27 ) (4596 ft )
    DIMLKE (72/25) (4726 ft)

    Heaviest Rainfall:
    0.63″ at BLUE CANYON(4200ft)
    0.60″ at SCHNEIDER MEADOW(5400ft)
    0.31″ at Joseph State Air(4120ft)
    0.30″ at ANEROID LAKE #2(7400ft)
    0.30″ at MT. HOWARD(7910ft)
    0.26″ at HOWARD Mt Howard(8150ft)
    0.25″ at ELK CREEK(6576ft)

  10. Joshua says:

    Warmest, driest, warmest, driest… this is getting very old. Not just warmer and drier than average, but record or near-record month after month. I’m moving to Greenland.

    • W7ENK says:

      Hey, relax. It was just a mere 3-4 years ago we were having a run of coldest, wettest, coldest, wettest, latest 60, latest 70, latest 80… remember?

      Everything equals out in the end.

    • Joshua says:

      I do remember that. It was beautiful. Moss, slugs, and mushrooms as far as the eye could see. It still makes me feel better to complain when it’s the opposite though.

  11. W7ENK says:

    0.90″ at my place in Milwaukie so far this month.

    This brings back up my old question of: How many traces does it take to add up to 0.01″? I arbitrarily chose 3 for my records, but that’s by no means official.

  12. As I stated before, it will be my driest May ever recorded(in 41 years of observations). However for official records, the driest May in Vancouver,BC was in 1946 at 8.4 mm.(0.34 inches). I had a little more than that.

  13. Longview 400 ft says:

    This weather makes for good baseball games to be played. Go Clatskanie Tigers!!!

  14. High Desert Mat says:



    • High Desert Mat says:

      Since we’ve all gotten to be first at one point or another, maybe it will be more of a challenge to maybe post a “last” comment. As long as Mark doesn’t give up when he’s about to start a new post.

      Wait a minute, theres no prizes or pats on the backs either,,,, I’m really tired, goodnight all.

    • pappoose in scappoose says:



    • Mark Nelsen says:

      That’s great Mat…you never know when I’m going to post do you?

    • WEATHERDAN says:

      Not childish, just a tradition. Nothing wrong with that. Peace

    • W7ENK says:

      Waiting up all night to catch a glimpse of Santa Claus, Tooth Fairy and the Easter Bunny are all traditions, too…

      …just sayin’.

    • High Desert Mat says:

      Well Mark we have an idea. Usually about a week in the summer and almost fail in the winter or every other day. Thanks for the email lol.

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