Historic Rainy Day In Portland

9pm Monday…

2.69″ rain so far today at PDX.  That’s the wettest December day you’ve lived through!  It’s also ties for the wettest day ANY month of the year:


In case you are thinking…”wait a minute…I’ve seen it wetter than this!“.  Yes, you are right; it has definitely been wetter in a 24 hour period but not by much!  Two other times in the past 20 years we’ve seen more than the 3.22” we’ve seen in the past 24 hours.


This will go down as the 3rd wettest 24 hour period.

Notice I said PDX.  Official Portland records have been taken at the airport since 1940…so about 75 years.  There are older records from various locations downtown, but that area tends to be wetter than PDX (by 15-20% in the wet season) so we’d be comparing apples/oranges.  Plus, we only get observations from that location once per day, no hourly info, and no calendar day info.  That’s why we always talk about PDX.

Here are the other totals from today in the metro area and the rest of the FOX12 viewing area.

Surprising numbers at Hood River and The Dalles!  Good news for you folks.  A soaking is always welcome out there.

The big issues today were mudslides and small creeks.  All sort of sliding and high water.  Johnson Creek hit its highest level ever this afternoon at 15.33′  That even beat out the 1996 flood.  That’s due to the intensity of the rain, definitely not the duration.  Here’s a mudslide just off I-84 on Corbett Hill Road…precarious position to be in!


What happens the next few days?

One more warm/wet system tomorrow night, then more typical “colder systems” for the end of the week and the weekend.

I DO NOT expect a repeat of the 2-3″ totals tomorrow night.  More like 1.00″ to 1.50″ as this time it moves through pretty quickly.  Here’s the RPM forecast, which tends to be too wet often.


More wind too, although not too crazy.  Should be similar to this afternoon’s wind.

We’re still looking for a huge snow dumping in the Cascades as those colder storms arrive starting Thursday.  I think the real ski season begins this weekend and early next week.  That should include the lower elevation resorts too.  Not bad for mid-December!

Chief Meteorologist Mark Nelsen

30 Responses to Historic Rainy Day In Portland

  1. Farmer Ted says:

    “2.69″ rain so far today at PDX. That’s the wettest December day you’ve lived through!” –NOT— And even if the record held for Portland, believe it or not folks do live and have lived in other places and even local micro-climates. “Figures lie and liars figure.”

  2. Jason Hougak says:

    So if Timberline received just shy of 6″ of precipitation I wonder how much snow fell further up on Mt Hood above the snow level. 5-6 feet? That had to be one crazy sight and too bad the snow level wasn’t down to Government Camp. At least there’s only another day of washout before the snowpack can rebuild.

    A big thanks to China and its out of control air quality. Maybe they’ll learn after being stuck under that heavy smog layer for a few days.

  3. runrain says:

    Detours both getting home last night and to work this morning. 110th near Foster (usual problem area), and 62nd and Johnson Creek (very unusual for that one).

  4. geo says:

    http://wxweb.meteostar.com/meteogram/over/link.shtml?KRDM Warmed up to 73 degrees last night in redmond!

  5. Not a whole lot of rain here yesterday (less than half an inch) but it’s the mild temperatures that I notice. It stayed just below 50F all night here (49.7F). My lowest temperature so far this month was 40F on the 4th.

  6. Tyler Mode in Battle Ground says:

    My low temp today (54) is 8 degrees above the average high…

    2 years ago today, the low temp was 8 degrees.

  7. Tyler Mode in Battle Ground says:

    The extra 0.01 needed to break the record came finally…25 minutes late…


  8. W7ENK says:

    Well, Rod Hill is calling for another 2-3″ of rainfall over the next 24 hours…

    I guess we’ll have to wait and see which is of you is right, Mark! lol

  9. schmit44 says:

    12/7/2015 Oregon (All) Temperature Summary

    High:67 at ECHO( 683 ft)
    Low: 57 at North Bend Munic(16 ft) & COOS BAY (P365)(89 ft) & USCRN SITE NEAR(39 ft)

    High:34 at Mt Hood Meadows(7300 ft)
    Low: 29 at ELK CREEK (6576 ft ) & Mt Hood Meadows (6540 ft ) & HARL BUTTE (6071 ft ) & Mt Hood Meadows (7300 ft )

    Largest Diurnal Change: 23 degrees
    BARNHT (65/42 ) (894 ft )
    EW3020 The Dalle (63/40) (1047 ft)
    DEE FLAT (60/37) (1260 ft)
    CW3808 Enterpris (57/34) (3927 ft)
    CW1102 Wallowa (56/33) (2946 ft)
    EW1810 Lostine (56/33) (3376 ft)

    Heaviest Rainfall:
    6.00″ at NORTH FORK(3060ft)
    5.92″ at Timberline Lodge(5880ft)
    5.80″ at RED HILL(4410ft)
    5.65″ at RED MOUND(1753ft)
    5.49″ at LOG CREEK(2800ft)
    5.00″ at LITTLE MEADOWS(4020ft)
    4.90″ at SADDLE MOUNTAIN(3110ft)
    4.70″ at BLAZED ALDER(3650ft)
    4.55″ at CANNIBAL MOUNTAI(1939ft)
    4.40″ at GREENPOINT(3310ft)
    4.40″ at NRAWS 6 (CORNET)(6626ft)
    4.37″ at HEBOWX Mt. Hebo(3160ft)
    4.37″ at CEDAR(2220ft)
    4.34″ at SOUTH FORK(2257ft)
    4.28″ at EW4856 Brookings(1365ft)

  10. muxpux (Longview) says:

    Storms like this I miss Oak Harbor, WA. Gust to 59 and only .09″ today

  11. marinersfan85 says:

    2.82 today in Newberg.

  12. Chris says:

    3.98″ rainfall in 24 hours at SE 141st & Clatsop (Eastridge Park/Johnson Creek watershed).

  13. W7ENK says:

    My 24 hour rainfall total today was π

    Easy as that.

    That’s a new all-time record for 24 hour rainfall since I started keeping track back in June 2010. Old record was 2.68″ on 11/19/2012

    Absolutely incredible!

  14. geo says:

    What the….. 65 at 10o’clock at nite!

  15. Mark bergal says:

    It sure has been interesting. I guess its still to warm to assume any if those cold storms could give the lowlands snow too

  16. Aleta-West Gresham says:

    It was awful going up 43 toward Lake Oswego this morning! Amazing amounts of water gushing off the hillside!

  17. Boring Oregon says:


  18. Aleta-West Gresham says:


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