Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
334 PM EDT Fri Oct 20 2023

Valid 00Z Sat Oct 21 2023 - 00Z Mon Oct 23 2023

...Rain from the Great Lakes to the Northeast and over the Northwest...

...Temperatures will be 15 to 25 degrees above average over the parts of
the Northern Intermountain Region/Southwest into the Plains and
Middle/Lower Mississippi Valley...

A front extending from the Lower Great Lakes to the Mid-Atlantic and then
southwestward to the Gulf Coast on Friday will advance off the Eastern
Seaboard by Saturday. The system will produce rain over parts of the Great
Lakes/Ohio Valley into the Northeast and southward to the Carolinas. The
rain will continue over the Northeast into parts of the Central
Appalachians on Saturday.

Furthermore, on Friday, a second front over the Upper Mississippi
Valley/Northern Plains will move southeastward off the Southeast Coast by
Sunday. The system will keep light rain over parts of the Upper
Mississippi Valley/Upper Great Lakes Friday evening into Saturday. As the
front moves southeastward, rain moves into the Lower Great Lakes/Ohio
Valley overnight Saturday. In addition, the rain showers continue over
parts of the Northeast. On Sunday, the rain showers continue over the
Northeast, with wet snow at the higher elevations of New York State.

Meanwhile, upper-level troughing and a weak boundary over the West will
aid in creating light rain over parts of the Pacific Northwest and
Northern/Central California overnight Saturday into Sunday.

Further, upper-level ridging extending from the Rio Grande Valley to the
Northern Intermountain Region will slowly creep eastward into the
Middle/Lower Mississippi Valley by Sunday. The upper-level ridging will
allow temperatures to be 15 to 25 degrees above average over the Northern
Intermountain Region/Southwest into the Plains and Middle/Lower
Mississippi Valley.


Ziegenfelder


Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php