Wake Up Portland, We Have A Snowstorm!

8:30am Sunday…

We’ve had an early “pre-show” of snow today, but the main event is still on!  Everything in the previous posting is still valid.  We have a snow/ice “event” beginning in Portland this morning and for the first time in almost 2 years we actually have a cold & snowy day for the kids (and adults).

ORE213 at Powell Blvd N_pid2708

HIGHLIGHTS FOR WESTERN VALLEYS

(Includes all lowland areas from Longview to Albany)

  • NO THAWING…Temperatures remain in 20s or around 30.
  • Light snow at times through 10am
  • Increasing snow midday/afternoon
  • Possibly freezing rain/ice pellets mixed in by late afternoon/evening.  An icy glaze MAY develop on top of snowy roads.  If we’re lucky it’ll remain as mainly snow.
  • 1-4″ total, by late this evening, depends on whether we switch to ice pellets/freezing rain at some point.
  • Blowing and drifting snow east metro in the gusty gorge wind areas.  Yes it’s possible to get 1 foot drifts out of 2-3″ of snow.
  • Roads snow-covered & icy through Monday morning commute

Sorry about the early arrival, a band of light/moderate snow worked it’s way north ahead of the main moisture this morning.  I got almost an inch out of that one here at home.  Radar shows that decreasing now but the radar is already beginning to “backfill” with additional precipitation.

The short-term HRRR model shows precipitation picking up and coming down steadily from 11am onward into the evening.  Once again it has increased total precipitation up into the .30 to .40″ range.  IF that were all snow, that’s up to 4″.

hrrr_t_precip_portland_16

12z WRF-GFS gives us .20-.30″ precipitation and our RPM has around .30″.  Basically all models are giving us enough for 2-4″ of snow…assuming there is not a widespread switchover to freezing rain or ice pellets.  The WRF-GFS says only a narrow tongue of warmer air moves up the east side of the valley, keeping the mid Willamette Valley in the snow all day too.

Enjoy!

For the purposes of the Oregon AMS “first snow” contest we do at the Winter Weather Conference each year, it finally happened this morning.  The first observation of snow at PDX was at 7am.  Technically 6:53am.  Notice the -S  means LIGHT SNOW.  If you chose January 3rd, you are a winner!  I’m not, I chose NO SNOW.  Always a good bet generally, but apparently not this year.

Capture

79 Responses to Wake Up Portland, We Have A Snowstorm!

  1. Marc (East Vancouver) says:

  2. Greg Meier says:

    Hi Mark,
    I’m going to be hauling logs off Larch mtn this week for the Bakers. What can I expect for weather conditions?
    Thanks,
    Greg

    • Mark Nelsen says:

      Road (first 2 miles at least) icy probably through Wednesday morning. It should thaw from Louden Rd. on up either tomorrow or Wed.

    • Hi, Greg – I take it from your post that you drive log truck… I am partners with a guy in Camas that buys firewood logs, and occasionally has need of a self-loader. Could you contact me offline? jgilmor at pacifier.com or 360-two-one-six-5802.

  3. Lurkyloo says:

    2 blks South of Rose City Golf Course — crispy rain and crackly trees. I’m not trying to drive anywhere in this. I expect a mess tomorrow … SNOW DAY for the kids!!!

  4. 225' Tigard says:

    It was all freezing rain but now back to all sleet with a couple (ok one) flake mixed in…

  5. Katrina says:

    Tiny ice pellets near skyline and Cornell rd, forming a crust on the snow. 800′.

  6. Sapo says:

    29 in Tigard and it’s probably only going to get colder…Tons of precipitation out there and it is all falling as freezing rain and ice, this could be a pretty big ice storm by the time it’s over. Sounds like most meteorologists thought at least some of this band of precip would be snow, but it’s all ice…scary and the roads are extremely slippery.

    If this was snow we would be getting 2-3 more inches, maybe it’ll switch back but we’ll see. At this rate will be a big ice storm

  7. umpire says:

    Pretty steady ice pellets/freezing rain on the skylights right now, NE Portland. Nice accompaniment to the Seahawks blowout.

  8. WEATHERDAN says:

    30.1 in Salem with light snow and zr. About 1/2 inch on ground. Mainly zr with a few flakes mixed in. GFS Meteogram shows another cold blast between the 12-16. That is for you model riders out there. So I have had light snow twice this Winter. Light zr twice this Winter. Several windstorms over 50MPH this Winter topping out at 64MPH. Record rains in December and a Tornado 70 miles away. And we will likely see more Winter weather before March. So please no more Winter was a bust posts. The ski resorts are happy and so are the marinas. The tv mets have something to talk about this Winter so just enjoy Winter. And hey MLB Spring training is only 6 weeks away and Daylight Savings Time is only 10 weeks away. In the meantime I will enjoy the cold and the snow. Peace.

  9. Max in Fairview says:

    A few ice pellets with some light snow working back in here.

    • Aleta- West Gresham says:

      And if my front window is anything to go by freezing rain can be added to the list! Ice pellets are bouncing around everywhere here.

  10. Longview 400 ft says:

    Steady small flake snow shower for the last 30 minutes. Currently 31.1

  11. Jonathan SEPDX says:

    All zr in inner se currently. Roads are pretty messy. Lots of stuck cars and people sliding all over. Hope it switches to snow but that seems unlikely at this point

  12. Andrew says:

    Looks live our first wave of heavier precip is now moving into the south metro.

  13. Andrew says:

    Why would the NWS cancel the winter weather advisory saying temperatures have warmed above freezing when most obs are in the upper 20’s??? Do these guys even check our local observations?

  14. paulbeugene says:

    Stubborn nature of this cold air mass is being apparent here in Eugene. Temp got up to 32.9F at my house then dropped back to 30.8F. Not sure how much precip is left to fall today but thought it was worth a mention about temps down south in the valley

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