US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
157 PM EST Mon Nov 25 2019
 
Valid Thursday November 28 2019 - Monday December 02 2019
 
Hazards:
- Heavy precipitation across portions of the Central Great Basin and California, Sun-Mon, Dec 1-Dec 
2.
- Heavy rain across portions of the Central Plains, the Lower Mississippi Valley, the Central Great 
Basin, the Tennessee Valley, the Middle Mississippi Valley, California, the Southern Plains, the 
Ohio Valley, and the Southwest, Thu-Fri, Nov 28-Nov 29.
- Heavy rain across portions of the Lower Mississippi Valley, the Central Appalachians, the 
Tennessee Valley, the Middle Mississippi Valley, the Southern Appalachians, the Great Lakes, and 
the Ohio Valley, Sat-Sun, Nov 30-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, Thu-Sat, Nov 28-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 Northeast and the Great Lakes, Sun-Mon, Dec 1-Dec 2.
- Severe weather across portions of the Central Plains and the Southern Plains, Fri, Nov 29.
- 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.
- High winds across portions of the Mid-Atlantic, the Northeast, the Central Appalachians, and the 
Ohio Valley, Thu, Nov 28.
- 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, Thu-Mon, Nov 28-Dec 2.
- Heavy precipitation across portions of mainland Alaska, Thu-Sat, Nov 28-Nov 30.
 
Detailed Summary:

The medium range period (Thursday Nov. 28 through Monday Dec. 2) is very busy with multiple weather 
hazards found across the country. Starting on Thanksgiving across the Northeast, a departing and 
restrengthening low pressure system will create a tight pressure gradient across the Northeast and 
northern Mid-Atlantic. This will result in High Winds from eastern Maine to northern Virginia.

The most impactful system of the period is forecast to be found across the Southwest and central 
Rockies on Thursday and Friday, before exiting eastward across the Northern Plains and Midwest 
Saturday and Sunday. Heavy rain is possible across portions of southern California, as well as 
southern Arizona on Thursday and Friday. Precipitation will mostly fall as snow from the Mongollan 
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 Wyoming 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 on Friday ahead 
of the approaching cold front. The heavy rain threat will shift east on Saturday and Sunday across 
the Ohio Valley and central Appalachians, with a widespread 1 to 2 inches of rain possible. 

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

Across Alaska, heavy precipitation is forecast across the southern coast of mainland Alaska between 
Thursday and Saturday. Several feet of snow is possible across the Kenai Mountains.   

Snell