103 
FXUS01 KWBC 080838
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 AM EDT Thu Oct 08 2026

Valid 12Z Thu Oct 08 2026 - 12Z Sat Oct 10 2026

...Hurricane Isaias is forecast to intensify rapidly, bringing
damaging winds and torrential rain to portions of the Florida
Panhandle, southern Alabama and southern Mississippi, with storm
surge for coastal communities by late on Friday...

...October heatwave across central and southern California shows
sign of relief by Friday...

...High-elevation wet snow could reach the Canadian border of
Montana and Washington by early Saturday morning...

An increasingly active weather pattern is in store heading into
the weekend as tropical activity ramps up and gets caught amid
major changes in the upper-air pattern in the mid-latitudes. First
of all, tropical cyclone Isaias has intensified into the first
hurricane of the 2026 Atlantic hurricane season over the warm Gulf
water northwest of the Yucatan Peninsula early this morning.
Isaias is forecast to intensify further as it gradually turns
northward and makes landfall Friday evening when damaging
hurricane-force winds and torrential rain are expected to impact
areas from western Florida Panhandle to southern Alabama and
southern Mississippi with storm surge for the coastal communities.
As Isaias turns northward over the next couple of days, the
circulation of the hurricane will continue to interact with a
frontal boundary extending east through Florida. This interaction
will gradually shift the heaviest rainfall associated with Isaias
toward the east side of the hurricane circulation over time. The
Weather Prediction Center is highlighting a moderate risk of
excessive rainfall from across southern Alabama to the western
portion of the Florida Peninsula from Friday to Saturday morning,
with a slight risk extending much farther inland. Rainfall amounts
in the order of 5 inches can be expected closer to the coast,
along with locally higher amounts. By Saturday morning, the center
of Isaias is forecast to move well inland across central Alabama.
Isaias will begin to lose tropical characteristics but expand in
size to bring squalls, tropical-storm-force winds and torrential
rain well inland as the system continues to interact with the
front. Meanwhile, showers and thunderstorms will continue to
linger over the Florida Peninsula as the front begins to lift
northward on Friday. WPC will continue to collaborate with the
National Hurricane Center (NHC) on the rainfall aspects of Isaias.
Please refer to the NHC for the latest forecast track on Isaias at
https://www.nhc.noaa.gov.

Meanwhile, a long-duration October heatwave across portions of
California and the Desert Southwest is showing signs of easing as
a major shift in the upper-air pattern is in store for the western
U.S. High temperatures this afternoon in the Central Valley of
California are forecast to be below the century mark but they will
be high enough to once again challenge daily high temperature
records. From Friday into the weekend, a major dip in the jet
stream will bring a surge of much colder air through the Pacific
Northwest. This trough will allow the heat to moderate across the
Southwest but temperatures will remain above normal into the
weekend. A strong low pressure system is forecast to form in
western Canada and spread the warm air mass into the northern High
Plains on Friday with highs near 90 degrees possible along with
gusty winds. By Saturday morning, high-elevation wet snow could
reach the Canadian border of Montana and Washington behind a
potent cold front.

Conditions remain cooler and below average along the East Coast
and particularly for the Northeast, though temperatures will
moderate quite a bit over the next couple of days with much warmer
highs into the 70s expected for most locations by Thursday,
followed by a brief intrusion of cool air reaching interior New
England by Friday and lasting into the weekend. Elsewhere across
the nation, conditions will continue to stay mostly dry into the
weekend, except for some scattered showers across the central
Rockies and the Four Corners, and a frontal system crossing the
upper Great Lakes today. Lastly, a new round of showers will
develop over the north-central Plains early Friday morning ahead
of a warm front lifting northward ahead of the intensifying
low-pressure system centered over western Canada.


Kong


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






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