22 F was followed later in the day by a high of 76 F making for a diurnal range of 54 F just one day removed from the summer solstice. Less than 36 hours after dropping to 22 F the temperature climbed all the way to 83 F the next day (20 June 2016). A total of 11 RAWS sites in Oregon out of 132 total measured temperatures in the 20s yesterday morning at elevations ranging from 3231 to 5500 ft.
On 15 June 2016, 41 out of 132 RAWS sites in Oregon reported a minimum temperature at or below the freezing point (32 F) with 2 sites in Klamath and Deschutes Counties reporting 23 F. The 850 hPa temperature at Salem Oregon reached a low of -0.1 C at 12 UTC 14 June 2016. This was followed by +0.2 C the next morning at 12 UTC 15 June 2016.
Redmond Oregon reached 24 F on 15 June 2016 which tied the record low temperature for the month of June. This was the third such occurrence over the past 69 years of record.
Yesterday afternoon the vicinity of Salem was again visited by a genuine down-East rain storm, with thunder and lightning accompaniments. This is the second storm of this kind to visit this immediate section this season, and it is a remarkable fact that they are the first storms of this nature that ever made their presence know hereabouts. The memory of the oldest inhabitant retains no recollection of like storms. Many persons have seen it rain just as hard here as it did yesterday, but no such vivid flashes of lightning were ever seen here, nor was such loud and sharp thunder ever heard in the valley.
Can it be the climate is undergoing a change, or is this the exception that forms the rule? But this season is a remarkably peculiar one, anyhow. Winter held on unusually long, making a late spring, with rains well into summer. And now, in the midst of harvest, to be treated to an electric storm–well, it is an attraction not down on the bills.
Seattle Sand Point (SEW) has seen measurable precipitation on each of the past 14 days (26 Feb – 10 Mar 2016). This month, with 3.20 inches so far, is likely to be the 6th consecutive month with above normal precipitation at SEW, where March normal precipitation is 3.51 inches. We may reach the annual normal of 36.1 inches before the end of this month, with 6 months still remaining in the 2016 water year.
Eastern Washington has been a land of temperature extremes this past week. Earlier this week the temperature reached 106 F at Benton City on 8 June 2015 and several sites reached 105 F, including the Hanford climate station. Now just 5 days later, we are experiencing an unusually late freeze and frost near Spokane and Pullman. The Turnbull NWR Climate Reference Network site is reporting a very unusual June temperature in the 20s with 28.3 F reported early this morning (13 June 2015).
There seems to have been some strange climate change at work across San Francisco since 2000. Daily minimum temperature records are very difficult to achieve at the airport in this the 21st century but still quite common in downtown San Francisco over the past 15 years.