Coldest Night of the Season So Far For Tonight

November 3, 2015

How exciting, for the first time in over a month we actually had a below average day!  The high of 57 was normal, but the low of 40 at PDX was below normal.  This was the first below average day since October 2nd.

MarkTempsColdDay

Note that the west metro area cleared out, allowing temps to drop well into the 30s last night while the east side under cloud cover was in the 40s.

PLOT_Lows_Metro

Different story tonight with mainly clear skies, light wind, drier air, and a chilly airmass.  That should allow all of us to drop into the 30s with a killing frost in the coldest outlying areas.  Here’s my forecast for low temps:

FCST_Tonight_Metro

Frost is overdue this year…which seems reasonable after the warmest October on record.

Looking ahead, a weak system moves through our area Thursday dropping less than .25″ rain and just a few inches snow in the mountains.  Then a colder/stronger system for Sunday/Monday as an upper-level trough drops in for a visit.  So probably a foot of snow on the higher parts of Timberline and Mt. Hood Meadows over the next week:

MarkSnow_MtHoodFcst_2013

Now the ECMWF showed any later systems next week splitting and heading into California, implying that days 7-10 will be mainly dry around here…we’ll see.

Chief Meteorologist Mark Nelsen