US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
405 PM EDT Fri Mar 26 2021
 
Valid Monday March 29 2021 - Friday April 02 2021
 
Hazards:
- Heavy snow across the higher elevations of northwestern Montana, Mon, Mar 29.
- Flooding possible across portions of the interior Southeast, the southern Appalachians, into the 
Ohio and Tennessee Valley, as well as northern New England.
- Flooding occurring or imminent across portions of the lower Mississippi Valley.
- High winds across much of the northern Rockies into the northern High Plains as well as much of 
New England, Mon, Mar 29.
- Heavy precipitation across the Alaska Panhandle into the southern coastal ranges of mainland 
Alaska, Tue-Wed, Mar 30-Mar 31.
 
Detailed Summary:

The medium-range forecast period (Monday, March 29th to Friday, April 2nd) will begin with a rather 
strong low pressure system moving out of New England.  Strong and gusty winds behind the exiting 
system over much of New England Monday morning should gradually subside as the day progresses.  
Meanwhile, another strong low pressure system will be exiting the northern Rockies toward the 
Canadian prairies Monday morning.  The tight pressure gradient behind the strong storm and its 
associated sharp cold front will likely bring high winds across much of Montana into parts of 
Wyoming on Monday.  The higher elevations of northwestern Montana should also see moderate to heavy 
snowfall Monday morning before the snow gradually tapering off into Monday night.  The snow should 
then reach the Colorado Rockies Monday night with moderate snowfall before tapering off Tuesday 
night behind the departing cold front.

The aforementioned cold front will continue to push toward the eastern U.S. through the middle of 
next week.  The southern Appalachians and vicinity should see the greatest chance of receiving 
enhanced rainfall ahead of the front.  Although no areas of heavy rain is indicated on the chart, 
locally heavy rainfall is possible in this region during midweek next week.  By around next 
Thursday, there is good model signal for a low pressure wave to develop along the cold front which 
will be ready to exit the East Coast.  Interior New England should see the greatest chance for the 
rain to change over to snow before ending.  Meanwhile, much of the Northeast should experience 
rapidly falling temperatures and blustery winds behind the exiting front and the low pressure 
system.

For Alaska, a deep cyclone that is forecast to move over the Bearing Sea on Sunday will gradually 
push into mainland Alaska during the next few days.  Although no hazard areas are depicted on the 
chart, much of western and southwestern Alaska will likely experience moderate snowfall, blowing 
snow, as well as storm surges along the coast under blustery southerly winds on Monday followed by 
slow improvements through midweek.  Meanwhile, moisture from the Pacific will likely stream toward 
the Alaska Panhandle as a low pressure system is forecast to intensify on the trailing front.  This 
will bring the likelihood of heavy mountain snow and mixed rain and snow on the immediate coast 
across the Alaska Panhandle into the southern coastal ranges of mainland Alaska Tuesday and 
Wednesday.

Kong