US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
156 PM EST Tue Nov 26 2019
 
Valid Friday November 29 2019 - Tuesday December 03 2019
 
Hazards:
- Heavy precipitation across portions of the Central Great Basin, California, and the Southwest, 
Sat-Mon, Nov 30-Dec 2.
- Heavy rain across portions of California, Sat-Mon, Nov 30-Dec 2.
- Heavy rain across portions of the Central Plains, the Lower Mississippi Valley, the Central 
Appalachians, the Tennessee Valley, the Middle Mississippi Valley, the Southern Appalachians, the 
Southern Plains, and the Ohio Valley, Fri-Sun, Nov 29-Dec 1.
- Heavy snow across portions of the Central Plains, the Central Rockies, the Central Great Basin, 
the Northern Plains, the Northern Rockies, the Southern Rockies, the Northern Great Basin, the 
Southern Plains, and the Southwest, Fri-Sat, Nov 29-Nov 30.
- Heavy snow across portions of the Central Plains, the Great Lakes, the Upper Mississippi Valley, 
and the Northern Plains, Fri-Sun, Nov 29-Dec 1.
- Heavy snow across portions of the Mid-Atlantic, the Northeast, and the Great Lakes, Sun-Mon, Dec 
1-Dec 2.
- Severe weather across portions of the Central Plains, the Lower Mississippi Valley, and the 
Southern Plains, Fri, Nov 29.
- Severe weather across portions of the Lower Mississippi Valley and the Southern Plains, Sat, Nov 
30.
- Flooding occurring or imminent across portions of the Northern Plains.
- High winds across portions of the Central Plains, the Central Rockies, the Central Great Basin, 
the Northern Plains, the Southern Rockies, the Middle Mississippi Valley, the Upper Mississippi 
Valley, the Southern Plains, and the Southwest, Fri-Sun, Nov 29-Dec 1.
- High winds across portions of the Great Lakes and the Upper Mississippi Valley, Sun-Mon, Dec 
1-Dec 2.
- Much below normal temperatures across portions of the Central Plains, the Central Rockies, the 
Central Great Basin, the Northern Plains, the Northern Rockies, the Southern Rockies, California, 
the Northern Great Basin, the Pacific Northwest, and the Southwest, Fri-Sun, Nov 29-Dec 1.
- Heavy precipitation across portions of mainland Alaska, Fri, Nov 29.
- Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Mon-Tue, Dec 
2-Dec 3.
 
Detailed Summary:

The medium range period (Friday Nov. 29 through Tuesday Dec. 3) will feature multiple weather 
hazards across the country. The most impactful system of the period is forecast to be found across 
the central Rockies on Friday, before exiting eastward across the Northern Plains and Midwest 
Saturday and Sunday. Precipitation will mostly fall as snow from the Mogollon Rim in Arizona 
northward through the northern Rockies, where a foot or more of snow is possible in the higher 
elevations. As the system enters the Great Plains, heavy snow is forecast to spread from eastern 
Montana to the Upper Great Lakes. High winds will also accompany the low pressure system across the 
High Plains, extending into the Northern and Central Plains on Saturday and Sunday. This 
combination of heavy snow and strong winds could lead to blizzard conditions. Given this is a very 
busy weekend for travel, it is important to consider alternate plans across this region. Further 
south, heavy rain and severe thunderstorms are possible across the Southern Plains and Deep South 
on Friday and Saturday ahead of the approaching cold front. The heavy rain threat extends east 
across the Ohio and Tennessee Valleys on Saturday, although models have trended drier with rainfall 
amounts there is still a decent signal for 1 inch or more of rain. 

By Sunday and Monday, the aforementioned system is expected to move into the Northeast and could 
bring heavy snow across the interior Northeast. Significant model spread still exists on timing and 
location of the heaviest snow, however the highest probabilities for impactful snowfall remain 
across portions of northeast Pennsylvania, Upstate New York, and into southern New England. High 
winds behind the system will be found across the Great Lakes by Sunday. Meanwhile, another round of 
active weather is forecast to bring rain and mountain snow to the western U.S. by Saturday. The 
highest amounts are currently forecast to be across northern and central California.

Across Alaska, heavy precipitation is forecast along the southern coast of mainland Alaska on 
Friday. Another round of heavy coastal rain and inland/mountain snow is possible on Monday and 
Tuesday across similar areas, as well as down the Alaskan Peninsula.

Snell