US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
416 PM EST Tue Nov 12 2019
 
Valid Friday November 15 2019 - Tuesday November 19 2019
 
Hazards:
- Heavy precipitation across portions of the Cascades, Sun-Tue, Nov 17-Nov 19.
- Heavy rain across portions of the Pacific Northwest, Sat-Sun, Nov 16-Nov 17.
- Heavy rain across portions of the Mid-Atlantic, Fri-Sat, Nov 15-Nov 16.
- Flooding occurring or imminent across portions of the Northern Plains.
- High winds across portions of the Southeast, the Mid-Atlantic, and the Northeast, Sat-Mon, Nov 
16-Nov 18.
- Much below normal temperatures across portions of the Mississippi Valley, the Central/Southern 
Appalachians, the Tennessee Valley, the Great Lakes, the Mid-Atlantic, the Southeast, the Southern 
Plains, and the Ohio Valley, Fri, Nov 15.
- Much below normal temperatures across portions of the Northeast, the Central Appalachians, the 
Middle Mississippi Valley, the Mid-Atlantic, the Southeast, the Great Lakes, and the Ohio Valley, 
Sat, Nov 16.
- Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Fri-Tue, Nov 
15-Nov 19.
- High winds across portions of mainland Alaska, Fri-Sat, Nov 15-Nov 16.
- High significant wave heights for coastal portions of the Aleutians, Sun-Tue, Nov 17-Nov 19.
 
Detailed Summary:

Cold air associated with high pressure over Central Canada and lingering cold air associated with 
another area of high pressure over Middle/Lower Mississippi Valley into parts of the Southern 
Plains/Western Gulf Coast will aid in producing and area of much below normal temperatures over 
parts of the Great Lakes to the Ohio/Tennessee Valleys, and Southeast westward to parts of the 
Southern Plains and parts of the Middle/Lower Mississippi Valley on Friday.  On Saturday, the area 
of cold high pressure will move eastward to Lake Huron moving the area of much below normal 
temperatures eastward to the Northeast, Mid-Atlantic, and parts of the Southeast and extending 
westward to parts of the Great Lakes/Ohio Valley.  In addition, as low pressure along the Southeast 
Coast moves into the northeastward to the Carolina Coast will produce rain that will create an area 
of heavy rain over parts of the North Carolina Coast on Friday into Saturday.     

A front moving into the Pacific Northwest and associated plume of moisture will aid in producing an 
area of heavy rain over the Olympic Peninsula on Saturday into Sunday.  Behind the front, onshore 
flow off the Pacific and deepening upper-level trough will aid in keeping and area of heavy 
precipitation over the Cascades with higher elevation snow and lower elevation rain on Sunday into 
Tuesday when the onshore flow ends.  Furthermore, with deep low pressure along the Southeast Coast 
and strong high pressure building over the Northeast, strong wind will develop along the East Coast 
from Maine to Northeastern Florida starting on Saturday and gradually tapering off by Monday.  The 
hazard of high winds will be depicted on the hazards map from Saturday into Monday.  For Hawaii, 
very humid air and upper-level energy will aid in producing heavy rain over parts of the Hawaiian 
Island on Saturday into Monday.  

Over Alaska, deep low pressure near Kodiak Island and strong high pressure over Chukchi Sea will 
produce a strong pressure gradient that will produce strong wind from Pt. Hope to Norton sound and 
associated areas of the mainland leading to the placement of an area of high winds over the region 
from Friday into Saturday.  Multiples areas of deep low pressure moving into Alaska and associated 
plumes of moisture will aid in producing and area of heavy precipitation from just north of Juneau 
to the Kenal Peninsula on Friday into Tuesday.  An area of rain and snow will develop just north of 
Juneau to just east of Yakutat on Friday that will slowly expand westward to the Kenal Peninsula by 
Monday.  The area of rain and snow will taper off to an area along the mainland coast near the 
Chugach Mountains by Tuesday.     

Ziegenfelder