US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
334 PM EDT Tue Oct 15 2019
 
Valid Friday October 18 2019 - Tuesday October 22 2019
 
Hazards:
- Heavy precipitation across portions of the Pacific Northwest and the Northern Great Basin, 
Sat-Sun, Oct 19-Oct 20.
- Heavy rain across portions of the Southeast and the Central Gulf Coast, Sat-Mon, Oct 19-Oct 21.
- Heavy rain across portions of the Central Appalachians, the Tennessee Valley, the Middle/Lower 
Mississippi Valley, the Mid-Atlantic, the Southern Appalachians, the Southeast, the Great Lakes, 
and the Ohio Valley, Mon-Tue, Oct 21-Oct 22.
- Heavy snow across portions of the Pacific Northwest and the Northern Great Basin, Fri-Sun, Oct 
18-Oct 20.
- Heavy snow across portions of the Central Rockies, the Northern Rockies, and the Northern Great 
Basin, Sat-Sun, Oct 19-Oct 20.
- Flooding possible across portions of the Northern Plains.
- Flooding occurring or imminent across portions of the Northern/Central Plains, the Upper/Middle 
Mississippi Valley, and the Great Lakes.
- Flooding likely across portions of the Northern Plains.
- High winds across portions of the Central Rockies, the Northern/Central Plains, the Central Great 
Basin, the Upper Mississippi Valley, Sat-Mon, Oct 19-Oct 21.
- High winds across portions of the Great Lakes and the Upper Mississippi Valley, Sun-Tue, Oct 
20-Oct 22.
 
Detailed Summary:

A deep upper-level trough, onshore flow off the Pacific, and a front will aid in producing an area 
of heavy snow over parts of the Northern Cascades on Friday into Saturday.  In addition, the same 
weather system will aid in producing heavy precipitation over the Southern Cascades on Saturday.  

Deep low pressure over East-Central Canada and high pressure over the Northern/Central Rockies will 
aid in producing high winds over parts of the Norther/Central Pains into parts of the 
Northern/Central Rockies on Saturday into Sunday.  Additionally, the deep low pressure over 
East-Central Canada, on Saturday, and another area of low pressure approaching the Great Lakes from 
the Upper Mississippi Valley, on Sunday, will aid in producing an area of high winds over parts of 
the Upper Great Lakes on Saturday into Monday.  

The front associated with the low pressure over the Upper Mississippi Valley, on Monday, will move 
eastward to the Lower Great Lakes/Ohio Valley into the Central Gulf Coast by Tuesday.  The front 
will intersect moisture from the Gulf of Mexico over the Lower Mississippi Valley into the Ohio 
Valley producing an area of heavy rain over parts of the Ohio, Tennessee, Lower Mississippi Valleys 
on Monday into Tuesday.  Furthermore, the moisture and boundary will aid in producing another area 
of heavy rain over parts of the Southern/Central Appalachians, likewise, on Monday into Tuesday.  

Multiple fronts crossing the Central Gulf Coast and moisture moving northward out of the Gulf of 
Mexico will aid in producing an area of heavy rain over parts of the Central/Eastern Gulf Coast on 
Sunday into Monday.  

There are no hazards forecast over Alaska from Friday into Tuesday.

Ziegenfelder