US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
337 PM EDT Thu Oct 29 2020
 
Valid Sunday November 01 2020 - Thursday November 05 2020
 
Hazards:
- High winds across portions of the Great Lakes and the Upper Mississippi Valley, Sun, Nov 1.
- Heavy precipitation across portions of the Alaska Panhandle, Sun, Nov 1.
- Heavy precipitation across portions of the Alaska Panhandle, Sun-Tue, Nov 1-Nov 3.
- Flooding possible across portions of the Alaska Panhandle, Sun, Nov 1.
- Much below normal temperatures across portions of mainland Alaska, Sun-Thu, Nov 1-Nov 5.
- Much below normal temperatures across portions of the Alaska Panhandle and mainland Alaska, 
Tue-Thu, Nov 3-Nov 5.
 
Detailed Summary:

The medium range period (Sunday, November 1st - Thursday, November 5th) should be reasonably quiet 
across the contiguous U.S. compared to the weather lately. The main hazard forecast is high winds 
across the Great Lakes region Sunday, as a potent surface low pressure system tracks to its north 
over eastern Canada. The high winds are expected over water in particular, and could cause trouble 
for boaters.

Associated with this surface low, a cold front will move across the central and eastern U.S. early 
next week, causing notable but not necessarily hazardous colder than average temperatures. Minimum 
temperatures could be 10 to 15 degrees below normal from the Southern Plains into the Mississippi 
and Ohio Valleys on Monday, with the Eastern Seaboard seeing temperature departures around that 
magnitude Tuesday. Cool high temperatures in the 30s and 40s are expected to spread from the Great 
Lakes region Sunday toward the Ohio Valley and Northeast by Monday/Tuesday. Some record low minimum 
and maximum temperatures are in the forecast. Meanwhile, warmer than average temperatures by 5 up 
to 20 degrees are possible for much of the West early in the week, spreading east into the 
Northern/Central Plains toward the Midwest closer to midweek.

Only light precipitation is forecast in the East through the period, with dry conditions in the 
central U.S. The main area of potentially heavy precipitation is across the Pacific Northwest 
Tuesday through Thursday, but the amounts of valley rain/mountain snow that could occur seem pretty 
typical for this time of year, and the past two weeks have been drier than normal there.

Alaska, on the other hand, can expect a busy pattern through next week. Sunday in particular looks 
to be an incredibly wet day across the Panhandle as above normal moisture interacts with a low 
pressure system, and areas of significant flooding are possible. There is some potential for gusty 
winds coming into the Panhandle especially Sunday night. Moderate to potentially heavy rain could 
linger especially over the southeastern parts of the Panhandle on Monday and Tuesday; while amounts 
may not be as high as Sunday, the additional precipitation could exacerbate flooding concerns.

Temperatures in Alaska are expected to be below normal for southern into central parts of the 
mainland early next week. By Tuesday into Wednesday, those cool temperatures should track into 
western portions of the Panhandle as well. Then, moderating temperatures are forecast to spread as 
far east as Anchorage by Thursday as relative warmth comes into the western part of Alaska as the 
upper-level pattern shifts to ridging. The North Slope should have above average temperatures 
through the period.

Tate