Spotted Wing Drosophila (SWD) degree-days (DDs) for selected western locations (updated daily)
Station Location (S to N) SWD DDs September 22, 2018
  Mtn View Moffett Fld CA   2985 DDs
18 days behind 2017
25 days behind 2016
7 days behind normal
  Medford OR   2765 DDs
11 days behind 2017
12 days behind 2016
DDs now EXCEED full year normal DDs
  Corvallis OR   2252 DDs
11 days behind 2017
9 days behind 2016
26 days ahead of normal
  Salem: McNary Field OR   2611 DDs
2 days ahead of 2017
7 days behind 2016
DDs now EXCEED full year normal DDs
  Aurora OR   2499 DDs
7 days behind 2017
11 days behind 2016
44 days ahead of normal
  Forest Grove OR   2412 DDs
4 days behind 2017
2 days behind 2016
DDs now EXCEED full year normal DDs
  Vancouver Pearson Fld WA   2650 DDs
4 days ahead of 2017
7 days ahead of 2016
DDs now EXCEED full year normal DDs
  HOOD RIVER OR   2577 DDs
5 days ahead of 2017
5 days ahead of 2016
DDs now EXCEED full year normal DDs
  Kelso-Longview Airport WA   2340 DDs
11 days ahead of 2017
4 days behind 2016
DDs now EXCEED full year normal DDs
  Prosser Barricade Hanf WA   3092 DDs
2 days behind 2017
11 days behind 2016
31 days ahead of normal
  BurlingtonMount Vernon WA   1726 DDs
2 days ahead of 2017
12 days behind 2016
25 days ahead of normal
  Bellingham Int Apt WA   1863 DDs
6 days ahead of 2017
10 days behind 2016
DDs now EXCEED full year normal DDs
  Abbotsford: B. C. BC   2056 DDs
5 days ahead of 2017
8 days behind 2016
DDs now EXCEED full year normal DDs
  Agassiz Auto RePting S BC   2168 DDs
5 days ahead of 2017
6 days behind 2016
DDs now EXCEED full year normal DDs

In presenting this information, we wish to stress that errors can occur. Use the information with caution. Predictive models do not replace the need for monitoring in the field. If you observe conditions that differ substantially from model predictions, please contact Len Coop to determine if the model inputs were incorrect, if the model functioning or weather data are in error, or if the model is inappropriate for your conditions.