US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
319 PM EDT Fri Apr 12 2019
 
Valid Monday April 15 2019 - Friday April 19 2019
 
Hazards:
- Heavy precipitation across portions of the Northeast, the Central Great Basin, the Northern 
Plains, the Northern Rockies, the Central Rockies, the Northern Great Basin, and the Pacific 
Northwest, Mon-Tue, Apr 15-Apr 16.
- Heavy precipitation across portions of the Central Great Basin, California, and the Southwest, 
Tue, Apr 16.
- Heavy precipitation across portions of the Central Rockies and the Central Plains, Wed-Thu, Apr 
17-Apr 18.
- Heavy precipitation across portions of the Great Lakes and the Upper Mississippi Valley, Thu, Apr 
18.
- Heavy rain across portions of the Lower Mississippi Valley, the Tennessee Valley, the Great 
Lakes, the Middle Mississippi Valley, the Upper Mississippi Valley, and the Ohio Valley, Wed-Thu, 
Apr 17-Apr 18.
- Flooding possible across portions of the Great Lakes, the Southern Plains, the Upper Mississippi 
Valley, and the Northern Plains.
- Flooding occurring or imminent across portions of the Lower Mississippi Valley, the Northern 
Plains, the Northern Great Basin, the Middle Mississippi Valley, the Upper Mississippi Valley, the 
Pacific Northwest, and the Ohio Valley.
- Flooding likely across portions of the Pacific Northwest, the Upper Mississippi Valley, and the 
Northern Plains.
- High winds across portions of the Central Plains, the Middle Mississippi Valley, the Great Lakes, 
the Upper Mississippi Valley, and the Northern Plains, Thu-Fri, Apr 18-Apr 19.
- Heavy rain across portions of the Alaska Panhandle, Wed-Fri, Apr 17-Apr 19.
 
Detailed Summary:

By the middle of next week, a strong storm system is forecast to develop and track across the 
south-central U.S., which will likely bring another round of heavy rainfall from the central Gulf 
Coast to Michigan for the middle of the week, with the potential for 1 to 2 inches of rainfall with 
locally higher amounts. Severe weather is becoming increasingly likely with this event across parts 
of the south-central U.S. for Wednesday and Thursday.

Across the western U.S., a series of systems will move across the Pacific Northwest and 
northern/central Intermountain region during the first half of this forecast period. The model 
consensus here generally supports a marginal threat for heavy precipitation (mostly snow) across 
parts of the northern Rockies and across parts of Idaho and the Sierra Nevada as an upper trough 
amplifies after crossing the West Coast. Elevation dependent snow is also likely for the Washington 
and Oregon Cascades.

Over Alaska, there is the possibility for heavy precipitation across the southeast Panhandle region 
for the second half of next week as a plume of enhanced Pacific moisture is advected inland and is 
orographically enhanced by the terrain, with QPF generally on the order of an inch expected.

Hamrick