US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
309 PM EST Mon Jan 04 2021
 
Valid Thursday January 07 2021 - Monday January 11 2021
 
Hazards:
- Heavy snow across portions of the Southeast, the Mid-Atlantic, and the Southern Appalachians, 
Thu-Fri, Jan 7-Jan 8.
- Heavy rain across portions of the Pacific Northwest and California, Thu-Fri, Jan 7-Jan 8.
- Flooding occurring or imminent across portions of the Southeast, the Southern Plains, the 
Mid-Atlantic, and the Pacific Northwest.
- Flooding likely across portions of the Mid-Atlantic.
 
Detailed Summary:

The Medium Range period (Thursday, Jan. 7th - Monday, Jan. 11th) will be quiet across the CONUS and 
Alaska. A closed upper-level low will sweep through the Southeast on Thursday as its associated 
surface low spreads rain showers across the region. Some heavy rain areas may develop over the 
Southeast and Carolinas through Friday. Heavy snow may develop over the Southern Appalachians 
between Thursday evening and Friday morning as the low slides into the Southeast coast and cold air 
filters down the Appalachians on the backside of the system. In the meantime, rain and snow will 
impact the Northern Rockies and Pacific Northwest as a short wave and deep area of low pressure 
enter the region on Thursday and Friday, respectively. Heavy rain will impact the California to 
Oregon coastal region on Thursday and Friday, as a result. This may be hazardous due to current 
severe drought and burn scar conditions. High pressure will begin expanding from the northwest into 
much of the rest of the U.S. this weekend. Another pair of cold fronts may bring high elevation 
snow and lower elevation rain to the Pacific Northwest at the beginning of next week. Temperatures 
will drop between 10-15 degrees below average over parts of the Southern Plains on Sunday as a low 
pressure system glides across southern Texas and into the Gulf of Mexico by Monday.

Coastal Alaska, from the Kenai through the Panhandle, will remain wet through the medium range as a 
series of low pressure systems impact the region. Isolated areas may see heavy precipitation as a 
result.

Kebede