12/01/2022, 12:46 pm EST

U.S. 16-20 Day Extended-range Forecast

Highlight: Not as cold across the North (yesterday below). Extended-range discussion: The cold regime is a little weaker especially in the Northwest U.S. in today’s extended-range forecast. The East chill moderates slightly and is strongest early in the period. The Northeast Corridor is at risk of widespread snow while the remainder of the nation is mostly dry.
12/01/2022, 9:10 am EST

U.S. Medium-range Forecast: Broadening cold (not excessive) pattern in the 11-15-day period.

Highlight: Broadening cold (not excessive) pattern in the 11-15-day period. Charts of the day: Climate Impact Company DEC/JAN/FEB 2022-23 monthly U.S. temperature anomaly outlooks. Medium-range 6-10 Day Forecast Valid December 6-10, 2022 (24-hour change right) Discussion: In the 6-10-day forecast, the East resists cooling while the West and central continent stay very cold. The Gulf States are unusually warm and humid. Medium-range 11-15 Day Forecast Valid December 11-15, 2022 (24-hour change right) Discussion: In the 11-15-day period, a broad colder than normal pattern emerges across the U.S. The Central/East chill lacks extremes. The Northwest chill trends less cold. U.S. Medium-range Precipitation Forecast Discussion: A Southwest to Mid-south U.S. storm track is intact in the 6-10-day period while the 11-15-day forecast maintains a drier national view. Extended-range Days 16-20 Day Forecast Valid December 16-20, 2022 Discussion: NCEP CFS V2 may be too cold in the Central U.S. in the extended-range outlook. The southern tier is where the broken storm track is located according to the model. Climate Impact Company will issue a 16-20-day outlook later this morning.