…Moderate to heavy lake-effect snow downwind from Lake Ontario on
Friday; light to moderate lake-effect snow downwind from most of the Great
Lakes Thursday evening into Friday…
…Moderate to heavy snow over parts of the Sierra Nevada Mountains and
the Northern Intermountain Region on Friday evening into Saturday; 0.10
inches of rain/freezing rain over parts of the Middle Mississippi Valley
on Friday evening into Saturday…
…Temperatures will be 10 to 20 degrees below average over parts of the
Upper Midwest…
A front over parts of the Southwest/Southern California will move eastward
to the Middle/Lower Mississippi Valley and Southern Plains by Saturday.
Moisture associated with the system will produce coastal rain and
higher-elevation snow over parts of the Pacific Northwest and Northern
California on Thursday afternoon. Overnight Thursday, the rain and
higher-elevation snow will move into Central California. The rain and
higher-elevation snow will continue into Saturday over parts of the
Northwest and California.
On Friday, another front over the Eastern Pacific will move onshore over
parts of the Northwest and California and move inland as far eastward as
the Northern Intermountain Region by Saturday. The storm will produce more
coastal rain and higher-elevation snow over parts of the Pacific Northwest
and Northern California. Additional moisture will move onshore Friday
evening, producing moderate to heavy snow over parts of the Sierra Nevada
Mountains and the Northern Intermountain Region through Saturday.
Meanwhile, on Friday into Saturday, as the lead front moves into the
Middle/Lower Mississippi Valley and Southern Plains, return flow off the
Gulf of Mexico will start to stream northward over parts of the Southern
Plains, producing showers and thunderstorms. The showers and thunderstorms
will expand north and eastward into the Middle/Lower Mississippi Valley on
Saturday. In addition, rain will move into the Ohio and Tennessee Valleys
on Saturday.
Additionally, overnight Friday, as the moisture streams farther northward
over the Mississippi Valley, rain/freezing rain will develop over parts of
the Middle Mississippi Valley. Slightly farther north, light snow will
develop over parts of the Upper Mississippi Valley on Saturday.
Furthermore, on Thursday evening, cold high pressure over the Upper
Mississippi Valley will move eastward to the Northeast by Saturday.
Moreover, cold air associated with the high will bring temperatures 10 to
20 degrees below average over parts of the Upper Midwest. Upper-level
energy moving over the Great Lakes will produce light to moderate
lake-effect snow downwind from most of the Great Lakes Thursday evening
into Friday. However, moderate to heavy lake-effect snow will develop
downwind from Lake Ontario on Thursday evening into Friday. By Saturday,
most of the lake-effect snow will wane.
Elsewhere, easterly flow off the Atlantic will produce light rain over
parts of Florida s east coast, starting on Friday into Saturday.
Ziegenfelder
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php