Sunday Morning Weather Quickie

Not a lot of time this morning, but I woke up at 3am, 5am, 7am and now I’m really awake checking out the windows just like the rest of you.   I had snow at some point (1000′ near Corbett) because there is slush on the deck even though it’s raining.

I just checked the KPTV tower temps at 1400 & 1800′ and they have both jumped into the mid-upper 30’s so the pre-frontal snow threat is over. 

As you folks below have discussed in GREAT detail, the low is about to move onshore.  Maybe between Astoria & Hoquiam.  GFS once again was much better than NAM on low placement.

Cold air  behind the front sure looks impressive doesn’t it?  That will arrive late this afternoon and overnight.   In a way that’s easier forecasting than snow levels ahead of the low.  It’ll be a well-mixed airmass since onshore flow will be strong.  I see buoy #46036 is 39 degrees and dropping about 300 miles  west of Forks, WA.  pretty chilly temp for sitting just 10 feet above a 50 degree ocean.

I didn’t look at a ton of maps this morning, but I feel generally pretty good about the forecast for tonight/Monday.  It’ll be the snow shower pattern through tomorrow.  Hard to get sticking snow into the city with breezy south wind continuing, but easy to get lots of snow as you head up towards 1000′.   NAM-WRF says freezing level is down to 1800′ by 10pm tonight and stays below 1000′ from then through Wednesday.  I don’t think actual modified arctic air (switch to easterly Gorge wind) arrives until late Tuesday.  So we’ll stay pretty moist through Tuesday morning.

I’ll be in with Drew at 5pm tonight and again at 10pm.  Another busy weather day…Enjoy!  Mark

454 Responses to Sunday Morning Weather Quickie

  1. B1900 Pilot says:

    Latest Report From Seattle: Thundersnow! This report from SeaTac is showing occasional lightning in cloud and visibilities down to less than 1/2 mile with heavy snow. Wow!
    KSEA 280259Z 36010KT 1/2SM R16C/2600VP6000FT -TSSN BKN002 OVC032 M01/M02 A2978 AO2 TWR VIS 3/4 TSB59 OCNL LTGIC OHD TS OHD MOV S P0000

  2. Matthias - North Portland says:

    The peaks of the coast range, that is.

  3. Jennifer says:

    Mark has an evening update up…

  4. xd2005 - Vancouver says:

    FYI…new post by Mark

%d bloggers like this: