Ice Storm In Progress

9pm…

Whew…it has been WAY too close for comfort here in the metro area.  Some of the hills and areas east of I-205 north of about Foster are seeing plenty of ice on objects, but so far very few reports of ice forming on roadways.  Latest temps:

PLOT_Temps_Metro

Generally you need temperatures down to about 30 for roads to turn icy while it’s pouring down liquid rain.  We’ve seen that a few times in the past.  Ice will accumulate on other surfaces but it’s tough to get solid ice on pavement in this situation.  I highlighted the areas in which we are VERY close to roads freezing up.   I noticed West Hills temps have bottomed out and a few other spots have finished with evaporational cooling as well.  ODOT road temperature sensors show temps 34 or higher across the metro area except 32 at Troutdale on I-84. As a result…

I don’t expect any significant icing of roads anywhere west of Troutdale/Gresham areas.  We are just about as cool as we are going to get right now.

I put this graphic on Facebook and Twitter just before 7pm when it became obvious ice was coming closer into the metro area…make sure you are following us on FOX12WEATHER for both of those.  I frequently get information out much more quickly on those two sites.

MarkFreezingRain_Metro

Chief Meteorologist Mark Nelsen

23 Responses to Ice Storm In Progress

  1. merwoman says:

    Mark, I think your wind gauge is out too. Your graphic says wind right now is 0, but it’s howling at my house and the wind is usually lower here in Springdale than it is up by you.

  2. merwoman says:

    The wind is howling here in Springdale and my concrete-block house is shuddering. It seems the wind sensor at the Corett school is out too. I had glazing on everything above ground-level when I got home at 8:00; I still don’t have glazing on the ground but everything else (including outside door mats) has a good coating. It’s so nasty out there the sheepdogs don’t even want to be out in it, and they mostly don’t care about weather.

  3. High Desert Mat says:

    Moderate sleet now. Temp is 19.9. First time I’ve seen zr/sleet with a temp that low. Usually its at least 25-26 with these, but those were usually in NE Pdx. Pretty cool out, I hope people are being safe. Nice glaze on everything and seems to be picking up.

  4. GTS1K' says:

    Yeah, I don’t know much except that my wife had to wait for someone to cut up a fallen tree on NW Skyline about 10:30 in order to get home. AND ice on all surfaces except the roads, mercifully.

    Windy and rainy and power has gone out momentarily three times in the last 30 minutes…

    …whoopeee.

  5. schmit44 says:

    12/1/2015 Oregon (All) Temperature Summary

    Warmest:
    High:62 at BANDON( 79 ft)
    Low: 53 at Port Orford(0 ft)

    Coldest:
    High:17 at MORGAN MOUNTAIN(4200 ft)
    Low: -2 at MALHEUR RIVER BE (3305 ft )

    Largest Diurnal Change: 40 degrees
    DW9630 La Pine (44/4 ) (4256 ft )

    Heaviest Rainfall:
    1.13″ at SOUTH FORK(2257ft)
    1.11″ at CW9822 Dallas(459ft)
    1.00″ at EW6020 Yamhill(203ft)
    1.00″ at Astoria Regional(10ft)
    1.00″ at SADDLE MOUNTAIN(3110ft)
    0.99″ at MEARES Cape Mear(1421ft)
    0.95″ at HEBOWX Mt. Hebo(3160ft)
    0.93″ at Tillamook Airpor(36ft)
    0.93″ at RYE MOUNTAIN(2000ft)

  6. Rob - S.E. Portland says:

    Just did another ice check and I’ve got more than .10″ accumulation now. I can clearly see that all the trees are heavily coated in ice and are now sagging. Powerlines are coated with icicles hanging off of them. With east winds gusting over 30mph I’m starting to get a little concerned about tree damage and maybe we see more power outages east of I-205. Hopefully not.

    Also, perhaps not as exciting as the evolving ice event/storm, but we need to keep an eye on the low pressure system for Thursday, especially Portland to Salem. Both the 00z GEM/EURO have latched onto a solution bringing a nice compact 985mb low scooting north just off the Oregon Coast. Looks like a strong PDX-EUG gradient of 8-10mb may setup. WRF was the same with track, but not as strong/compact with the low. We’re within 48 hours of this possibility, so seeing both models nearly in-step with each other is something that can’t be ignored. The GFS/WRF may catch onto this by 12z tomorrow. IF so, this would be a quick-hitting south wind event/storm.

  7. alohabb says:

    Car is all iced up now and branches falling at PCC Slyvania

  8. The Dalles is getting mostly pellets, with a few semi-melted-refrozen snowflakes mixed in. Not bad for the end of a Fake Cold event!

  9. The IR satelite looks like there’s plenty of clearing behind the rain…

  10. Rob - S.E. Portland says:

    It’s an ice storm 2 inches off the road surfaces and above!

    • Boydo3 N. Albany says:

      We had that last year before Thanksgiving. It was really weird because of how dependent upon elevation it was. Just fifty feet below my elevation (about 500′) it was all rain while we had a nasty tree wrecking event and power outages.

  11. Jerry says:

    Mark, I live in Carson. Will I make it to Portland for work tomorrow?

  12. Jerry says:

    Heavy ZR here in Carson, Wa

  13. alohabb says:

    I beg to differ ! The entire PCC Slyvania campus is iced up! Trees are hanging, rails are iced up, all vegetation is covered in heavy ice all the way to 26! The roads are fine , but you gotta be careful! I found out the hard way.

  14. Jason Hougak says:

    Drive home safe Mark

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