Summary:
- Warmer than average during September with western US temperatures 3-7°F above normal*.
- A stubborn upper-level cut-off low that moved slowly across the region brought significant rainfall to northern California and even some to southern Oregon. The remnants of a tropical storm brought rain to southern California while monsoon moisture continued in the southwest, while the rest of the west was dry.
- Warm/dry start to October over the western US. Temperatures over the short-term will be quite warm, although cool nights hint at the fall to come. Continued monsoon moisture for the southwest, dry elsewhere.
- Glorious weather is helping the PNW catch up and finish out the vintage. The first half of October is expected to continue the warmer than average temperatures, while the second half appears to cool to more seasonal temperatures. No rain in sight till mid-month, with models hinting at typical fall rain patterns in the second half of the month.
- The 90-day forecast is hinting at an average to warm first half of the winter in the west, with the PNW likely to see a wet start to the winter while California and the southern tier of states are likely to remain dry.
