Rain Returns

SnapshotI hadn’t really paid too close attention to the rainfall this month until tonight.  Wow, we were having a relatively dry March so far…until this evening.  Looks like PDX picked up over .50".  I was fortunate to spend 4-5 days at home working in the yard during the mild dry days lately too, so that took care of the last of the winter blues for me.  Of course that’s good since officially the astronomical spring begins tomorrow evening.  A chilly airmass moves inland tomorrow, dropping snow down to 2000′ by evening in the foothills.  Normally, during late March, this pattern would produce heavy downpours, hail, and possible thunderstorms.  But all model info says the airmass will not be very unstable tomorrow.  Lifted Indexes are too high and CAPE values aren’t very impressive either.  I dried out the forecast for Wednesday-Friday due to weak ridging developing with warmer temps by Friday.  Unfortunately the 00z GFS has the Thursday system clipping us, so hopefully that will correct itself in future runs…Mark

18 Responses to Rain Returns

  1. Derek-West Gresham says:

    Actually Antipex this is the season for snow to mix in at way warm temperatures. Honestly up at 2000ft it was probably upper twenties, but the surface warms so quickly that you get incredible lapse rates so that the snow doesnt have time to melt. Its easier to see snow at warmer temps in the spring for that very reason. By the way at about 1200ft in central Washington there is 6 inches of snow where the c-zone hit.

  2. Cherie – I would believe snow falling at 40 degrees. Here in Gresham, however, it was far too warm for snow of any type. I do think, however, that some of the hail was very light and/or small and looked like snow at some points, but there were definitely no real snowflakes mixed in here. It can be quite easy to mistake hailstones for snowflakes, especially in Oregon where we’re used to sloppy snow falling that’s half melted!

  3. Tornado Aly says:

    I think it’s funny that the IGES GFS shows snow for the end of march, beg of April. It’ll probably do that in June too.
    http://www.cascadeaccess.com/~mnelsen/mrfiges.htm

  4. kirk says:

    Wow chilly outside only 41.8 here.

  5. Derek-West Gresham says:

    http://www.nco.ncep.noaa.gov/pmb/nwpara/analysis/
    This is a new GFS model.

  6. Cherie_in_Vernonia says:

    Sorry Jerry…but it was ALL snow in the last showere that moved thru. I know it is 40 but it WAS snow. Did not say it was sticking….just said it was snowing :~)

  7. SnowFlake says:

    Raining pretty good here at just over 500′ in Tigard/Bull Mtn… Got a lot of hail and (believe it or not) a couple of sloppy flakes (or maybe sleet). Patio is a gray/white now… Fun!

  8. Derek-West Gresham says:

    Doubt all you want but during a heavy shower I saw a good amount of flakes mixed in. And I very much know what I am talking about.

  9. Jerry says:

    I highly doubt there is snow falling. Temps are in the mid 40’s and 850 temps are not even close to low enough…

  10. Derek-West Gresham says:

    Knocked off 8 degrees with one shower! Saw some small hail, snow, and lots of rain with it.

  11. Cherie_in_Vernonia says:

    Lotsa snow in the last few showers…then sun breaks. Must be Spring in Oregon :~)

  12. Jesse says:

    Still hanging in the upper 40s today in Orchards, with breezy WNW winds making it feel quite chilly after all the days in the 60s to around 70. Probably won’t break 50 today with cold advection continuing and showers around. If you like cool weather, enjoy it. This may be our last day in the 40s until next October or November. Our window for days below 50 lasts into mid-April, but is becoming harder and harder as the days grow longer and the sun strengthens.

  13. Just had a bit of a hailstorm move through – the hail was very loud falling and I would estimate close to or around 0.5 inch in diameter! Some of the biggest hail I’ve seen in a while here. Temperature is mild though at 51 degrees – hopefully this is a sign of bigger storms to come this year!

  14. Christiana in Beaverton says:

    Got this in my e-mail box from Katu the forecast for tonight:
    It will remain cloudy. There is a slight chance for a bit of snow. Temperatures will drop from 41 early this evening to 35 by 8:00pm then rise back up to 38 late evening. Winds will be 10 MPH from the northwest turning from the southwest as the evening progresses.

  15. Sean (Lebanon, Indiana) says:

    I’m definitely glad it’s “Spring” now. Even though we’ve been having some springtime warmth over the last week or so. Even had some morning thunderstorms yesterday, unfortunatly I was still on the road in PA. But more thunderstorms are in the forecast for the rest of the week as a warm front moves through and pumps in warmer air and moisture from the Gulf of Mexico. Nothing severe, this is more like late spring/early summer type of thunderstorms.

  16. offroadjosh-aloha says:

    welcome back!! thanks for the update, hope this is a good year for T-Storms.

  17. Christiana says:

    Thanks Mark. Let’s hope the weather clears up for spring break. Welcome back. You were missed.

  18. Gregg-Troutdale says:

    Thanks for the update Mark, and welcome back!!!!

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