Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
256 PM EDT Wed Sep 27 2023

Valid 00Z Thu Sep 28 2023 - 00Z Sat Sep 30 2023

...A cool and wet weather pattern to persist across the Pacific
Northwest...

...No changes to the wet pattern across Florida...

...Showery pattern to continue through the Ohio Valley and Lower Lakes and
develop along the Mid-Atlantic coast into Southern New England...

...Warm dry conditions expected across much of the central portion of the
nation...


The recent wet weather along the Northwest coast will continue into middle
to later portions of the week as the recent series of northeast Pacific
frontal boundaries continue to push inland.  Scattered showers in the wake
of the strong front moving inland into the Northwest Wednesday/Wednesday
night will be followed by another area of low pressure, associated frontal
boundaries and additional precipitation, moving toward the Northwest coast
on Thursday.   While precipiation has been above average over the past
week in this wet pattern, longer term drought conditions still plague the
Northwest with large portions of Oregon and Washington State in severe to
exceptional drought.  The wet weather across the Northwest is also
supporting continued below average temperatures from northern California,
through the Pacific Northwest and into the Northern Rockies.  Across these
areas, high temperatures are expected to be 10 to 20 degrees below average
over the next several days.

A wet weather pattern also expected to continue across much of Florida for
the next few days.  A stationary frontal boundary is forecast to remain
across the northern portion of the peninsula while a mid to upper level
trof over the Gulf of Mexico helps to stream above average moisture values
across the state.  Additional heavy rains are possible across much of
Florida Thursday and Friday, with isolated flash flooding possible,
especially in urbanized regions. 

A slow moving mid to upper level low across the Mid-West will continue its
slow slog eastward through the Lower Lakes into the end of this week.  The
showery pattern in association with this system will continue to produce
area of moderate to heavy rainfall from the Ohio Valley, northward into
portions of the Lower Great Lakes.  Isolated flash flooding is possible
with these rains, with the greatest threat across portions of west central
Kentucky where the heaviest rainfall is forecast.  As this mid to upper
level low pushes eastward, it will begin to draw moisture northwestward
off the western Atlantic and into areas from the coastal Mid-Atlantic to
southern New England Thursday night into Friday, with increasing rain
chances across these areas.

While several area of the nation will be wet over the next few days, dry
and warm weather will occur across large portions of the nation from the
Southwest, through much of the Great Plains, Mississippi Valley and
western to central Gulf Coast.  Across these areas, summer like
temperatures are expected, with day time highs between 10 and 20 degrees
above average.

Oravec


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