Weather Record In Jeopardy, Winter Recap & More…
Has it felt wet and cold across the Pacific Northwest lately? If you answered “yes” you would be correct. March is currently running approximately 1.5 degrees below normal at the Portland International Airport. February came in even colder at nearly 3 degrees below normal (40.3 degree average). That was the coldest February since 1993’s 40.0 degree average temperature. After a near-miss on Wednesday, the Portland International Airport is still in jeopardy of breaking a “chilling” record for latest date to ever reach 60 degrees for the first time in a given calendar year. Vancouver just inched past the 60 degree mark today (60.1 to be exact) so the record is over at that location. By this time last year, Portland had already recorded 8 days at or above 60 degrees, including a 70 degree high temperature on March 20th. April 1st is quickly approaching and this is also the date in which Portland typically reaches 70 degrees for the first time in a given year. Portland is a solid 30+ days behind schedule this year, struggling to get out of the 50’s. If the Portland International Airport stays below 60 degrees through this coming Sunday, March 27th we will have set a new all-time record for the latest 60 degree high temperature in a given year at that location. 1955 is the only other year that stands in the way of breaking this record. See data below.
Looking even further back at records that date back to 1871 in downtown Portland (140 years), the latest date to reach 60 for the first time in a given year was set on April 9th 1875. The current weather pattern looks conducive for topping the airport record set back in 1955, however the downtown Portland record is still in question. As you may recall, last June set the all-time Portland airport record for latest “first 80″ degree temperature of the year which now sits at June 12th. Additionally, the Portland International Airport has reached the 5″ mark for rainfall as of 5pm Wednesday, which currently ranks March as in the top 15 wettest since records began in 1940 at the airport. With additional rainfall in the forecast over the next week, Portland could easily move up to perhaps 5th place on the all-time list at the airport. Portland is currently 137% of normal on rainfall for the month of March with 5.09” recorded as of 5pm Wednesday. See data below.
Portland International Airport latest “first 60” degree temperature – 1940-2011 = 71 years
3/27/1955 – 60 degrees (all-time record latest)
Downtown Portland latest “first 60” degree temperature – 1871-2011 = 140 years
4/9/1875 – 62 degrees (all-time record latest)
4/8/1897 – 69 degrees
4/6/1880 – 63 degrees
4/5/1876 – 61 degrees
3/31/1904 – 61 degrees
3/31/1922 – 63 degrees
Wettest March’s at the Portland International Airport. 1940-2011 = 71 years
1957 7.52″
1997 7.14″
1983 6.80″
1989 6.73″
1961 6.04″
2003 5.75″
1974 5.65″
1943 5.54″
1972 5.41″
1945 5.30″
2011 5.09″ (through Wednesday 3/23/11 at 5pm)
Winter Recap Presentations Now Posted
The Oregon Chapter of the American Meteorological Society recently reviewed the winter of 2010/2011 at its monthly meeting last week. KPTV Fox-12 Chief Meteorologist Mark Nelsen and I presented some interesting data! The presentations can be downloaded at the following locations:
Part 1 (Mark) – http://www.ametsoc.org/chapters/oregon/Minutes/2011_3_16_Nelsen.pdf
Part 2 (Steve) – http://www.ametsoc.org/chapters/oregon/Minutes/2011_3_16_Pierce.pdf
April AMS meeting reminder — The Oregon Chapter of the AMS will be hosting its April meeting at Stark Street Pizza in N.E. Portland on Thursday, April 21st at 7pm. The general public is welcome to attend. Bonneville Power Administration Meteorologist Chris Karafotias will give a detailed presentation on the Madden-Julian Oscillation and the impact it had on this past winter’s weather. For more information on this meeting, click: http://www.ametsoc.org/chapters/oregon/
Stay tuned!
Steve