90 Day Weather Outlook for The U.S. Warmer Than Normal as The Jet Stream Drops
Much of the country is forecast to see warmer than average temperatures in the latest 90-day forecast issued from NOAA’s Climate Prediction Center (CPC). The outlook, which covers October to December, also has the South and East seeing above average precipitation. The Northwest is expected to see drier than normal weather.
The drought expanded and intensified across the Pacific Northwest and northern Plains during the past month, and those conditions are expected to continue through December. Heavy to excessive rainfall resulted in major drought reduction throughout the middle to lower Mississippi Valley and the southern half of the Great Plains, where continued improvement is in the forecast.
The CPC is expecting an El Nino to form in the coming months. That is the main factor leading to above average temperature forecast, along with wetter weather in the South. Warmer water temperatures are already being observed in the Central Pacific, but the warming is not widespread or significant. The El Nino is now expected to be a weaker event, which can have implications on the positioning of the subtropical and polar Jet Streams. This can lead to other weather patterns influencing climate trends, with a diminished El Nino effect.