…Heavy rain and flash flooding possible across the western Gulf coastal
region and across coastal Washington, Oregon and northwest California…
…Wild fire threat across the Central and Southern Plains…
…Much above average temperatures from the Rockies, east to the East
Coast, while much cooler air settles south into the Northern Plains, Upper
Lakes into northern New England…
…Winter weather with heavy snow possible for Northern New England and
portions of the Central to Northern Plains toward the Upper Mississippi
Valley/Upper Great Lakes…
There is a wide variety of weather hazards expected across the Lower 48 as
the work week ends and the weekend begins. A slow moving mid to upper
level low moving across northern Mexico and into the Southern Plains will
focus a heavy rain and flash flood threat across areas from South and East
Texas into southern Louisiana. There is expected to be rounds of
thunderstorms and heavy rains from Thursday afternoon/ Thursday night into
Friday across these areas where atmospheric moisture values are forecast
to remain well above average. Areas of South Texas have already received
rainfall totals ranging from 2 to over 7 inches in the past 24 hours. The
additional rounds of thunderstorms will pose an increasing flood and flash
flood risk, especially over areas that see repeat rounds of heavy rains.
Heavy rain is also possible along coastal portions of Washington State,
Oregon and northwest California from Thursday afternoon into Friday as a
slow moving area of low pressure meanders off the Pacific Northwest coast.
This additional rainfall will not have the severe potential that the
rains of the past 24 hours did for the Pacific Northwest, but there will
be a low end risk of flooding. The area of low pressure off the Pacific
Northwest coast and the associated cold front that has moved inland, will
be bringing much cooler conditions for the Northwest compared to the past
few days, which saw much above and record high temperatures.
While temperatures cool across the Northwest over the next two days, much
above average temperatures will push eastward from the Rockies/Plains
region Thursday, eastward to large sections of the East coast Friday into
Saturday. This will be a warming trend for large sections of the east
from the Lower Lakes, Ohio Valley, Central to Southern Appalachians and
Mid-Atlantic which have seen below average temperatures over the past few
days.
The exception to the above warming trend, will be along the northern tier
of the Lower 48 from the Northern Plains, across the Upper Lakes and into
far northern New York State and northern New England. A strong front
oriented from west to east across these regions will separate the much
above average temperatures to the south of this front from the below
average temperatures to its north. Winter weather is possible on the cold
side of this front, with accumulating snows possible from far northern New
York State, across northern Vermont, northern New Hampshire and southwest
Maine. This will be followed by another area of accumulating snow
potential Saturday into Sunday from the Central to Northern Plains toward
the Upper Mississippi Valley and Upper Lakes region.
To the south of the winter weather areas across the Central to Northern
Plains, windy,warm and dry conditions will continue across the remainder
of the Central to Southern Plains, save for the wet weather across South
Texas. These conditions will continue to support a wild fire risk across
these areas over the next few days.
Oravec
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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