…The effects from the remnants of Debby will begin to diminish this
evening as it races into southeastern Canada…
…Below average temperatures on tap this weekend across a large portion
of the Lower 48…
…Above average temperatures continue across the West into the South, but
no record highs expected…
…No changes to the fire weather threat and poor air quality across the
Northwest, Northern Rockies and Great Basin…
The remnants of Debby will continue its quick northeastward push from
northern NY State this evening into southeast Canada Friday night. This
will bring an end to what has been a highly impactful, wet and
destructive tropical system that has brought heavy rains, flash and river
flooding and tornadoes to areas from Florida into the Southeast, the
Mid-Atlantic, western and northern NY State into New England. The last
vestiges of heavy rains associated with Debby will be pushing quickly
eastward from northern NY State into New England from Friday evening into
Friday night and early Saturday morning.
In the wake of Debby pushing into southeast Canada, the associated cold
front will push cooler and much drier air eastward into the east coast
this weekend. This cold front marks the leading edge of an area of much
below normal temperatures that have been entrenched across large areas to
the east of the Rockies from the Northern to Central Plains, into the
Upper to Mid Mississippi Valley over the past few days. The cold airmass
has produced several record low maximum temperatures over the past 24
hours from Wyoming into Nebraska, South Dakota and Minnesota. Record low
morning temperatures in this airmass are also possible Saturday morning
across portions of Iowa, Illinois, Missouri and Oklahoma. In general
temperatures will be below average for morning lows and late afternoon
highs this weekend across a large part of the Lower 48 from the Northern
to Central Plains, eastward into the Upper to Mid Mississippi Valley,
Great Lakes, Ohio Valley and eventually Mid-Atlantic and Northeast.
Above average temperatures will continue into this weekend across the
Southeast, Florida, the Gulf Coast into the Southern Plains and westward
into the Southwest and across much of California and the Great Basin where
a mid to upper level ridge axis will stretch across. While these areas
will be above average temperature wise this weekend, records are not
expected.
Scattered monsoonal showers and thunderstorms will continue on the western
periphery of this mid to upper level ridge, with locally heavy rains and
isolated flash flooding for portions of the Southwest into the Southern
Rockies. More organized thunderstorm activity may push eastward into
portions of the Southern to Central High Plains late Friday night into
Saturday morning, producing more widespread heavy rain potential and
localized flash flooding.
No significant relief on tap for the dry conditions, low relative
humidities and gusty winds that are producing fire weather conditions from
the Northwest into the Northern Rockies and Great Basin. These fire
weather conditions expected to persist into the weekend, along with poor
air quality from smoke being produced by ongoing fires across these areas.
Oravec
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
