Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
423 PM EDT Tue Oct 25 2016
Valid 00Z Wed Oct 26 2016 - 00Z Fri Oct 28 2016
...Heavy rain possible over parts of the Upper Mississippi Valley...
...Heavy rain possible over parts of the Pacific Northwest and Northern
...Snow over parts of the Northern Appalachians...
Low pressure over the Northern/Central Plains will move eastward to the
Lower Great Lakes/Ohio Valley by Thursday. The system will produce rain
north of the low and showers and thunderstorms south of the low over parts
of the Northern Plains into parts of the Upper/Middle Mississippi Valley
on Tuesday evening. The showers and thunderstorms will expand into the
Central/Southern Plains by Wednesday morning that will move eastward into
the Central Appalachians and parts of the Ohio/Tennessee Valleys by
Thursday morning. The rain will move eastward into the Great Lakes and
parts of the Ohio Valley/Mid-Atlantic/Northeast by Thursday morning, too.
Meanwhile, upper-level energy over parts of the Northern Intermountain
Region into parts of the Great Basin will move northward into West-Central
Canada by Wednesday evening. The energy will produce rain over parts of
the Northern Rockies/Intermountain Region into parts of the Central
Rockies that will move northward into parts of the interior Pacific
Northwest and Northern Intermountain Region on Wednesday, ending by
Wednesday evening. Additionally, a plume of moisture will move into the
Pacific Northwest/Northern California Coast Tuesday evening into Thursday
as the next front moves onshore over the West Coast Wednesday into
Thursday. Rain will develop along the Pacific Northwest/Northern
California Coast Tuesday evening into Thursday.
Elsewhere, upper-level energy over the Northeast will aid in producing
rain and snow over the highest elevations of the Northern Appalachians and
parts of Northern New England through Wednesday evening. In addition,
easterly flow off the Atlantic will trigger showers and thunderstorm over
parts of southeastern Florida Wednesday morning into Thursday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php