Another Wild Day…To the South

A Severe Storm Moving Into the Sweet Home Area This Afternoon

A Severe Storm Moving Into the Sweet Home Area This Afternoon

This must have been a nice storm (maybe not if you were right under it I suppose) to watch moving through Linn County this afternoon.  Can anyone count the 15 minutes worth of cloud to ground lightning strikes?  Must have been at least 50.

The storms were located slightly farther north today and mesoscale models look even better for tomorrow. 

I didn’t work yesterday, so it’s nice to not have to explain the mostly cloudy forecast that turned sunny, hot, and 90 degrees.  But it was a tough forecast, that’s for sure.  We did hit 90 at PDX today, the first of the year.  I was out running errands this afternoon and can attest to the warmth.  So why so warm?  Well, look at the observations.  The offshore flow surfaced across most of the Metro area today.  Notice the easterly breezes at PDX, TTD, and HIO.  And cloud cover remained to the south today.

For Tonight:  The big storms should die down, but I notice our RPM shows some weak instability drifting up over us late (like 2-5am) and generates a few light showers.  Then skies clear out around daybreak.  If we get incredibly lucky maybe some flashes of lightning late tonight.

Tomorrow:  There is good news for convection tomorrow.  Looks to me like tomorrow COULD be the big day with several things lining up for a good outbreak right here in the city.  It appears the offshore flow will continue until late afternoon, promising another very warm day.  Then a sudden southwesterly marine surge arrives in the Metro Area in the evening at about the same time CAPE values reach 1500-2000.  Lifted index of -2 to -4 along with precipitable water well above 1″ too.  I think it’s the WRF-GFS that generates over 1″ of rainfall close by in the 5-10pm timeperiod.  Our RPM model shows something similar except down closer to Salem.    Can’t wait for the 00z data.  Forecasting thunderstorms is even harder than snow in some ways, but I have a feeling someone between Salem and Longview in the valleys could get nailed tomorrow afternoon/evening.

Friday and Beyond:  Our 2+ week spell of unusual warmth is going to come to an end with a big marine push pushing lots of low clouds inland Friday and the weekend.  Not much chance for rain, but much more typical temps (highs 70-75) .

Mark Nelsen

262 Responses to Another Wild Day…To the South

  1. Seems like the radar is all “lit up” regardless of what radar (KRTX, KPDT or KMAX) site you choose….

    78.5F Td 61.5 RH 56%

  2. Snow-Zone/Monmouth-Elv200' says:

    Constant thunder and lightning, raining very heavy easily 1inch an hour truly amazing

  3. Sarah (E Gresham) says:

    I hope the golf course I live next to is watching this storm. It’s still sunny here but a lot of people are setting off for a round of golf….

  4. Jethro / South of Canby says:

    It’s getting a little crazy out here… thunder, lightning, gusty winds. Makes me wonder how long I should be hanging out in this single-wide trailer of an office…

  5. Jackfrost says:

    Former KATU weathergal just called KATU to report seeing a funnel cloud down by Salem.

  6. Snow-Zone/Monmouth-Elv200' says:

    Haven’t seen a storm like this in my life.

  7. boydo3, N. Albany 500' says:

    Wow that was a good one! Somewhere in the neighborhood got hit. Simultaneous strike and boom! Got about a 1/4″ of rain. Still some stuff going on but lessening.

  8. Timmy_Supercell (Hillsboro) says:

    Does anybody see a shelf cloud of some sort? This storm is very similar to the June 19 2005 storm, that one had an intense shelf.

  9. Tyler in Hazel Dell says:

    Storms seem to be forming a line…could really aid in stir up very strong winds.

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