Weather SUNDAY April 28 2024...More severe weather Midwest , fair and warm northeast dry southern California

More rounds of excessive rainfall and severe weather expected to push
eastward across the southern Plains tonight reaching into lower
Mississippi Valley on Monday...

...Snow over central Colorado gradually tapers off tonight but
high-elevation snow is forecast to spread inland from the Pacific
Northwest into the northern Rockies on Monday...

...Critical Fire Weather Risk over portions of the Southern High Plains...

...Warmer than average temperatures spreads from Midwest into Mid-Atlantic
on Sunday while well below average temperatures shift from the Four
Corners and Rockies into the Northern Plains...

More active and unsettled weather is forecast to continue across the
mid-section of the country through the remainder of the weekend into
Monday.  Multiple disturbances embedded within a slow-moving upper-level
trough responsible for the active weather are currently developing another
low pressure system over the central Plains.  Showers and thunderstorms
are expected to erupt in the warm and unstable air ahead of the low
pressure system east of a dry line from northern Texas through central
Oklahoma into eastern Kansas.  A moderate risk of severe weather is
forecast through tonight per the Storm Prediction Center with the
possibility of large hail, damaging winds and multiple tornadoes.  In
addition to the severe weather, intense rainfall rates are expected to
accompany these thunderstorms at times, leading to a moderate to locally
high potential of flash flooding to occur in these areas through tonight. 
By Sunday, the main area of thunderstorms will push farther eastward
toward the mid- and lower Mississippi Valley with a slightly lower threat
of severe weather.  Meanwhile, the heaviest rains should push farther
southeast into the ArkLaTex region as the trailing cold front associated
with the low pressure system begins to weaken.  The center of the low is
forecast to track northeast across the central Plains on Sunday, reaching
into the upper Midwest on Monday.  Strong to locally severe thunderstorms
can be expected to extend northeast across these areas including the
Midwest ahead of a warm front to the east of the low pressure center. 
Meanwhile, the threat of heavy rain will push farther southeast into the
lower to mid-Mississippi Valley as the cold front pushes eastward.

Meanwhile, snow on the backside of the low pressure system is forecast to
gradually taper off tonight over central Colorado, and so will the areas
of mixed rain/snow extending into the Four-Corners as the system moves
farther away into the central Plains.  Meanwhile, another low pressure
system will begin to move away from the Great Lakes into Canada with
scattered showers ending over the upper Great Lakes but continuing from
the lower Great Lakes into New England.  Strong southerly flow behind a
high pressure system will bring very warm air northward into the East
Coast through the next couple of days with high temperatures climbing well
into the 80s to possibly near 90 degrees for the interior Mid-Atlantic. 
These temperatures will be in contrast to the cool temperatures expected
for the Pacific Northwest by Monday as the next upper-level trough from
the Pacific is forecast to push inland.  This trough will bring widespread
high-elevation snow and lower elevation rain across the Pacific Northwest
toward the northern Rockies on Monday with increasingly windy conditions
as a low pressure system begins to develop over the northern High Plains
into southern Canada.  Meanwhile, dry and warm winds sinking down the
southern Rockies will continue to keep a critical fire weather risk over
the southern High Plains.