Storm Summary Posted

February 10, 2014

It’ll be permanent, I put it as a PAGE above…feel free to comment on the event up there.  Any other comments can continue here:

Chief Meteorologist Mark Nelsen


ECMWF Maps: Mild, Cool, Mild

February 10, 2014

Spent most of today cleaning up emails and dealing with post-storm stuff.  I’m working on a page detailing how the storms went last week forecast-wise.  The 4 weekly maps from last night’s ECMWF run are almost the same as they have been for a week, or maybe even 10 days.  Mild westerly flow this week, cooler flow then real chilly trough next week.  Then the last few days of February into early March ridging comes back

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500za_week2_bg_NA

500za_week3_bg_NA

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The 00z GFS seems to support that idea with snow levels down to the “hilltop level” about 10 days from now, then milder again.

tseries_850t_000-384_Portland


Freezing Rain Threat Ends; Temperatures Warming

February 10, 2014

9:30am Monday…

It seems like all 4 of the weather systems that have moved through our area the past week have been ahead of schedule.  That happened this morning too.  Rain arrived around 7-8am.  Luckily, clouds had moved in and temperatures warmed a bit during the night.  Portland was up to 32-33 once the rain arrived, keeping new ice accumulation to a minimum.

Now the best news:

Road temperatures have warmed enough that any ice accumulation is done…it’s back to normal rain

Air temperatures are mainly 32-33 degrees and heading uphill slowly

The last of the Gorge wind (our open freezer door) is dying down

Southerly pressure gradient in the valley is increasing, about 5 millibars from Eugene to Olympia.  That means fresh (milder) air is moving in and out of the western valleys.  I notice Kelso has seen a gusty SE wind all morning keeping those temps above freezing.  Eventually south wind will develop between Salem and Portland too.

The freezing rain threat is pretty much finished now in the metro area, it’ll be confined to the Columbia River Gorge the rest of the day.  And after a few more hours it’ll only be east of Multnomah Falls

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Check out the latest road surface temps:

  • I205/Division:  34
  • Canemah/Oregon City:  37
  • Hwy 26/Sunset Transit Center:  37
  • RockyPt. US 30:  37

All of those were at or below freezing a few hours ago…the melt is finally on!  And today it’ll be much faster than yesterday.

Chief Meteorologist Mark Nelsen