The warmer than normal forecast begins with the April-May-June 90 day forecast and continues through its August-September-October forecast, with a significant signal coming in for the July-August-September period being warmer than normal.
And in what would be a significant change from past years, models suggest the April-May-June and May-June-July periods will be drier than normal. (See photo gallery to step through the forecasted maps.)
To localize this for the Portland area, NOAA recently has been translating these maps into exact percentages for individual cities. Here is the temperature anomaly for Portland:
The forecasters cite a blend of climate models for the increasing confidence in a toasty West, plus a 50/50 shot that current neutral conditions may trend into warming El Nino conditions by summertime. If that were to hold into autumn and winter, that would not bode well for winter fans next year. Then again, a big bad feared El Nino last winter didn't pan out.
Suffice to say, if the forecasts are correct, it would mean a greater reliance on water for irrigation and, sadly, likely wildfire fighting so that fresh batch of snow the past few weeks up in our mountains should help combat those challenges.