Gusty Cold Front This Morning!

The cold front moved through right on schedule this morning with a good burst of rain, although totals so far today aren’t all that impressive, just 1/3rd to 1/2″

PLOT_Rain_Metro_Autoplot

Neither the rain, wind, or temperature change by themselves were impressive, but what was most impressive was the sharpness of the front.  By that I mean a quick and dramatic arrival with peak gusts between 30-40 mph central/west valley and a few minutes of extremely heavy rain.  A nice 5 degree temp drop was the “icing on the cake” for the weather geeks like me.  We tend to have a lot of weak cold and occluded fronts around here.   Notice the peak gusts were nothing special for November:

PLOT_Wind_Metro_PeakGusts_MANUAL

I noticed the cold front lost some of it’s “wind power” as it headed into the east side of the valley.  Not many gusts even to 30 mph east of I-205.  Near the Gorge part of that was probably due to the last of the east wind dying off, but even up around Happy Valley, Sandy, and Damascus it wasn’t too windy.

I have seen reference to some areas getting a  “downburst” or “possible tornado” this morning.  At this point it appears neither one occurred, at least according to the NWS.

What did happen is that in at least two spots (Gervais and Dallas), much stronger wind surfaced and caused damage.  In both areas the wind was strong enough to damage farm buildings.  Here’s the storm report from Portland NWS on the Dallas one:

0830 AM     NON-TSTM WND GST 4 ESE DALLAS            44.90N 123.24W
 11/07/2013  E70.00 MPH       POLK               OR   PUBLIC          

             BARN HEAVILY DAMAGED AND SEVERAL LARGE TREES WERE SNAPPED
             RESULTING IN DOWN POWERLINES. TIME IS UNKNOWN...BUT 
             GROUND REPORTS SUGGEST BETWEEN 830 AND 910 AM...EVEN 
             THOUGH FRONTAL PASSAGE ACCORDING TO RADAR WAS CLOSER TO 
             810 AM. STORM ASSESSMENT ESTIMATED 70 MPH WINDS.

Apparently no downburst or tornado because no evidence of swirling debris and/or outward pointing damage signature.  Part of the damage intensity might be due to direction the wind came from.  The wind gusts were southwest to west with the cold front, similar to a March 2011 event that brought a 55mph gust to PDX.  That one caused 50,000 PGE power outages.  We don’t see a strong west wind like that or today’s very often.

A very busy day in the weather center since we recorded our “year-end” weather special.  It plays on Thanksgiving and Christmas.  Then a school visit, then an all-day long food drive with the Portland Rescue Mission in the other studio.

Chief Meteorologist Mark Nelsen

 

 

13 Responses to Gusty Cold Front This Morning!

  1. It’s NOT….F. Grove….it is Forest Grove

  2. Peak gust of 26 mph here in BG at 8:34 AM, 33 mph at my parents.

  3. Jeff Raetz says:

    Had a rain rate of 5.67″ an hour here today!!!

  4. BoringOregon says:

    You in!!

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