…Heavy mountain snow continues for portions of the Central Rockies
through Sunday morning…
…Heavy rain expected for the Central/Southern High Plains and portions
of the Pacific Northwest this weekend…
…Warm temperatures expand across the northern tier states….
An anomalous upper-level cut-off low will continue to produce moderate to
heavy rainfall, scattered thunderstorms and high elevation snow across
portions of the Central Rockies and Southern High Plains this weekend.
Heavy snow will remain confined to portions of the Wasatch, Kaibab
Plateau, San Juans and Sangre de Cristos over the next two days. The
Sangre de Cristo mountains can expect anywhere between 1-2 feet of snow
and up to 3 feet over the San Juans by Monday morning. Rain showers and
thunderstorms will focus along a slow moving cold front in the Southern
High Plains this weekend. A few inches of rain may cause instances of
flash flooding over portions of southeastern Colorado down through eastern
New Mexico where a Slight Risk of Excessive Rainfall is in effect for
today. Moisture diminishes notably by Sunday, but the threat of an
isolated instance of flash flooding can’t be ruled out over parts of the
aforementioned areas as well as the Texas/Oklahoma panhandle.
A deep and positively tilted upper trough will generate a weak yet
prolonged atmospheric river event across the Pacific Northwest over the
next couple of days. Most of the precipitation that occurs, save for the
highest elevations of the Cascades, will fall in the form of rain.
Anywhere between 1-3 inches of rain is expected for the Northwest, with
isolated higher amounts in far northwestern Washington State, this
weekend.
A northern stream ridge shifting into south-central Canada will phase with
the southern stream ridge and generate unseasonably warm conditions over
the northern tier states this weekend. The greatest anomalies of 20-30+
degrees will occur over parts of the Upper Midwest, where high
temperatures will be in the upper 70s to low 80s on Sunday and Monday.
High pressure in the East will promote pleasant Fall weather ahead of what
will be another warming trend next week. Freeze Warnings are in effect for
portions of southeastern Arizona, Wyoming and the Snake River Valley
tonight and Sunday night. A High Wind Warning is in effect for parts of
the Southern Rocky Mountain front and adjacent foothills and plains today.
Kebede
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
