…More wet weather expected for the Pacific Northwest and mountain snow
across the northern Rockies this weekend…
…Snow develops across the upper Midwest to the upper Great Lakes on
Sunday as severe weather and heavy rain threat emerge across the Deep
South on Sunday…
…Fire weather threat continues across large portions of the Central to
Southern Plains…
A progressive weather pattern will continue to send unsettled weather
onshore into the Pacific Northwest followed by the formation of a low
pressure system over the northern Plains for the remainder of the weekend.
The first wave of moisture will reach farther inland today across Idaho
and into the northern Rockies as mountain snows and lower-elevation rains.
This will allow the rain near the coast along the Pacific Northwest to
taper off temporarily today before the next wave of moisture arrives on
Sunday. This next moisture plume will aim mainly toward Washington state
where a period of moderate to heavy rain is expected later on Sunday. The
higher elevation of the northern Cascades can expect more than a foot of
new snow from this moisture plume.
Meanwhile, the upper-level trough associated with the first wave of
moisture will advance toward the northern Plains where a low pressure
system is forecast to develop and track eastward today. Snow can be
expected to move across the northern Rockies today with mixed rain/snow
showers moving downstream into the northern High Plains. The low pressure
system will continue its eastward track across the upper Midwest into the
upper Great Lakes on Sunday while deepening and expanding in size. This
system will bring a period of snow from the far northern Plains/northern
Minnesota on Sunday, spreading into the upper Great Lakes by Sunday night
as the system center passes just to the south. Upwards of 6 to 8 inches
of new snow with locally higher amounts can be expected near the upper
Great Lakes.
To the south of the system, a lack of moisture will initially suppress
thunderstorm activities across the southern Plains today. By tonight, a
batch of thunderstorms is forecast to develop and move across the Ozarks
and much of Missouri ahead of a low pressure wave. Showers and
thunderstorms are expected to expand across the Ohio Valley and lower
Great Lakes on Sunday as the low pressure wave merges with the main
system. By Sunday night into early Monday, a higher threat of severe
weather mainly in the form of high winds and hail can expected to develop
across the Deep South ahead of an intensifying cold front trailing south
from the low center. Monday morning could see the rain reaching the
northern Mid-Atlantic with some wintry mix over the Poconos.
A cold front and a weak wave of low pressure will bring a period of mixed
rain and snow across the Great Lakes today before moving into the interior
Northeast tonight. A brief cold snap into the single digits across
northern Minnesota this morning will be in contrast to Spring-like
temperatures reaching into the 60s and 70s for the Mid-Atlantic states by
this afternoon. Meanwhile, very dry conditions along with blustery winds
and warming temperatures will continue to raise fire weather danger across
much of the Central and Southern Plains today, with the threat lowering a
bit on Sunday.
Kong
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
