Friday 3 December – Wednesday 8 December
Extended outlooks are more general in nature than the daily short term forecasts. Beyond a week, there is often significant uncertainty in the location and intensity of specific weather events. I will note where there is less, or greater, confidence than normal in these extended outlooks.
For more information, check out the latest weather animations.
Here is the latest short term weather forecast.
- Weather pattern becomes more active next week with a series of strong storms moving quickly across the country.
- Some snow in the northern-most portions of the country; periodic high winds over the Rockies.
- Much of the US remains warmer than normal for early December.
Outlook for Friday – Sunday 3-5 December:
— Low pressure moves into Washington State early Saturday bringing rain to western WA.
— Snow spreads eastward Saturday and Sunday from the inter-mountain states to the western Great Lakes. Heaviest amounts along the US – Canadian border.
— High winds over the Northern Rockies and High Plains of MT and WY Saturday afternoon through early Sunday.
— Low pressure develops over WI Sunday, bringing rain to the Upper Mississippi River Valley and Midwest, and snow to the northern Great Lakes.
Outlook for Monday – Wednesday 6-8 December:
— Strong Pacific storm moves into the northwest and northern CA Monday and Monday night. Slightly cooler temperatures, so more snow at higher elevations.
— The low pressure strengthens on Monday and moves up the St. Lawrence Seaway, bringing strong winds, mostly rain, and some snow to the Northeast.
— Strong winds Monday afternoon and evening across the eastern Great Lakes States and central Appalachians.
— Lake effect snows likely Monday night and Tuesday.
— Snow spreads across the Northern Plains Tuesday and another storm develops over WI Tuesday night.
— Strong to high winds Tuesday across the CO and NM Rocky Mountain Front Ranges.
— On Wednesday a significant storm moves through the Great Lakes, bringing strong winds, rain and thunderstorms to the southeast and mid-atactic states, and snow, sleet, freezing rain and rain to the Northeast.
— Wednesday will be very windy across much of the Pacific Northwest, the Inter-mountain west and along the Rockies from MT southward to NM.
Here is the temperature and precipitation outlooks for Wednesday – Sunday 1-5 December
Average temperature difference, relative to normal, Wednesday – Sunday 1-5 December 
Percentage of precipitation, relative to normal, through Monday 6 December. Red and brown is drier than normal; green and blue is wetter than normal.
Here is the temperature and precipitation outlooks for Tuesday – Saturday 7-11 December
Here is the temperature and precipitation outlooks for Thursday – Wednesday 9-15 December
