Rain Showers Then Clearing = Icy Roads!

10pm Tuesday…

The ice all melted today, except in spots at the top of the hills and in the Gorge.  That was great…life has resumed.

But something we see from time to time in the winter means we may have more school delays and icy roads for a different reason.

A band of showers passed over the metro area around 8-9pm.  Now skies are clearing behind it.  Temperatures are dropping quickly:

PLOT_Temps_Metro

Check out the dropping road surface temps as of 9:45pm:

MarkODOT_RoadTemps

Not good.  This is a classic situation of rain showers and then roads that freeze during the night.

It’s quite possible we get school delays in the morning due to the icy roads.  Click for a larger image.

Stay safe if you are out driving between now and morning!

31 Responses to Rain Showers Then Clearing = Icy Roads!

  1. JohnD says:

    Yeah ‘just don’t see an optimal set up for low elevation snow on Saturday–at least outside of the Gorge. Not nearly as conducive as last weekend. As alway, ‘hope I’m wrong! Also, of course holding out for last minute positive changes. Always possible!

  2. Sapo says:

    As others have mentioned on here, things are shaping up for an interesting Saturday. Almost all the models are forecasting some sort of precipitation on Saturday. Like last Sunday, the models are all varied in precipitation amounts and timing. Looks like the upper air temps would be a little colder this time and it might fall as all snow, if the surface temps are cold enough…We’ll see.

    • Boydo3 N. Albany says:

      There is a huge difference between last weekend and the up coming weekend… . Last weekend followed a full week of really cold temps east of the mountains and strong east winds down the gorge and over the Cascade passes. Plus the air mass was very dry.
      Granted the 850mb temps will be a tad cooler this weekend, the surface temps are going to be barely freezing at best. Last Sunday morning we were starting at the low 20s. We will be lucky if we are below freezing come this Saturday when the moisture moves in.
      Maybe the gorge gets some snow but the valley? Nix 🙂

    • Sapo says:

      Yep definitely differences as there isn’t too much of a cold air mass in place, models show some colder air moving in around Friday..Yeah looks warmer this time on the surface..maybe a rain/snow mix, or maybe cold rain.

    • Tyler Mode in Battle Ground says:

      18z shows 925 mb temps of +2 or +3…that’s too warm for snow. Surface temps around 35, too warm for freezing rain.

      This could all change, but I don’t see a great chance at this point in time.

    • W7ENK says:

      Indeed. If anything, we may see a repeat of the previous Sunday. Snow on the far Westside, mix on the inner Westside, rain only (even at elevation) on the Eastside.

      Only time will tell… we shall see.

  3. WEATHERDAN says:

    Looks like some more Winter weather for us this weekend. Maybe snow or maybe ZR. January 2016 looking like our coldest month since December of 2013. And it’s not really all that cold compared to normal, just in comparison to the last two years. 41 at 1:00 PM. This weather pattern reminds me of December 1987. An El Nino year and one of the analog years that keeps getting used. No real cold blast but some snow and ZR. This pattern lasted from about December 10th 1987 to January 10th 1988. It followed a real hot Summer. Peace.

  4. Washougal 1100ft says:

    gfs hinting moisture now for the weekend? Could get interesting?

  5. Pete says:

    43 degrees. That’s it for the last splotches of ice on the sidewalks of North Tabor.

  6. Andrew says:

    A large part of the west metro area is still below freezing with this line of moderate prcip moving towards us. Could get interesting in the next hour with Hillsboro only up to 29 degrees so far!

  7. W7ENK says:

    Super icy all over Milwaukie this morning, the hills were a bit tricky. But the worst of it was getting into the TriMet garage, Holé Chips and Molé!!

    BTW, if you missed this morning’s sunrise, I’ve got you covered…

  8. Chris s says:

    12z sure looks interesting for Saturday… Could be another this past Sunday repeat from about Salem north.

    • pappoose in scappoose says:

      NATIONAL WEATHER SERVICE PORTLAND OR
      853 AM PST WED JAN 6 2016

      THE MODELS…ESPECIALLY THE ECMWF AND TO A LESSER
      DEGREE THE GEM BUT NOT THE GFS…HAVE BEEN HINTING AT A WEAK SYSTEM
      BRUSHING THE FORECAST AREA FROM THE SOUTHWEST AROUND SATURDAY. HAVE
      INTRODUCED SOME LOW POPS FOR FRIDAY NIGHT AND SATURDAY IN COORDINATION WITH NEIGHBORING OFFICES…BUT THERE IS QUITE A BIT OF
      UNCERTAINTY. THE GFS COULD END UP BEING CORRECT WITH THE FEATURE SPLITTING AND FALLING APART AND DIVING SOUTH OF OUR AREA.
      HOWEVER…IF ANY PRECIPITATION DOES OCCUR…IT COULD BE OF THE WINTER VARIETY INLAND.

    • Chris s says:

      Wondering if the national weather circus will go all in on this one, since they botched the last?? Hope not, cause then it will of course not happen!!😄😄

    • pappoose in scappoose says:

      For sure. Undoubtedly risky business just having this discussion!

  9. Farmer Ted says:

    27 degrees at 7 AM

  10. schmit44 says:

    1/5/2016 Oregon (All) Temperature Summary

    Warmest:
    High:57 at Bullards Bridge( 23 ft) & North Bend Munic(16 ft) & EW6494 Florence(64 ft)
    Low: 51 at Gold Beach (US 1(60 ft)

    Coldest:
    High:24 at MIDDLE MTN(2544 ft)
    Low: 8 at Rome (4049 ft )

    Largest Diurnal Change: 26 degrees
    Rome (34/8) (4049 ft)

    Heaviest Rainfall:
    1.18″ at QUAIL PRAIRIE LO(3183ft)
    1.10″ at FOURMILE LAKE(5970ft)
    0.96″ at EW4856 Brookings(1365ft)
    0.94″ at RED MOUND(1753ft)
    0.71″ at RYE MOUNTAIN(2000ft)
    0.65″ at SISKIYOU MTN FIR(3156ft)

  11. Lolaswolf says:

    We still have some slick roads that didn’t melt much in Mountain Park. I drove to the store a couple hours ago, and I could definitely tell the slushy parts were starting to freeze again even though the temp was supposedly 36deg! We have our own micro weather up here. My weather app is never accurate up here.

  12. Jane says:

    I-5 at Capitol Hwy was fine at 10:30 pm, but once you exited onto SW Taylor’s Ferry and other side streets…complete sheet of ice, with at least one car spun out right there at the exit.

  13. Farmer Ted says:

    Clear skies now and the temperature is dropping fast! 30 degrees and freezing up fast, watch out for trouble in the morning.

  14. Marc (East Vancouver) says:

    24 hours ago, the conditions were exactly the same in East Vancouver. Approaching 30° with ice forming. Should be another interesting morning with wet covered roads.

  15. Shelly blark says:

    Clark county school delays? Could it be possible?

  16. Snow Maniac says:

    Icy roads everywhere on Bull Mountain. Car was sliding all over the place! 30 degrees.

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