…Record-breaking heat forecast across parts of the Southwest and
south-central United States…
…Developing storm system to bring unsettled weather to the Ohio Valley,
Great Lakes, and Northeast this weekend…
…Locally heavy rain possible over southeast Florida…
Predominant upper-level ridging stretching from the Southwest to the
southern High Plains will allow for another day of record-breaking heat
across parts of Nevada and Arizona today. High temperatures are forecast
to reach into the upper 90s and triple digits, with temperatures only
expected to be a few degrees cooler this weekend. Meanwhile, heat is
anticipated to expand across the south-central U.S. by Saturday as highs
into the mid-90s engulf the southern Plains. Well above average
temperatures should span into the central Plains and mid-Mississippi
Valley as well, with numerous daily record high temperatures possible.
Cooler and more fall-like temperatures will be found across the East
today, with areas of frost likely from the central Appalachians to the
Northeast early this morning.
The next autumn cold front to impact the Nation is forecast to cross the
Great Lakes and Northeast by Saturday before stalling over the
Mid-Atlantic on Sunday. An area of low pressure developing along this
frontal boundary is expected to deepen and move eastward over the Ohio
Valley and Lower Great Lakes. Areas of showers and thunderstorms
surrounding the system may dampen outdoor activities, with a few isolated
strong thunderstorms possible between eastern Kentucky and West Virginia.
Following in the wake of Hurricane Milton, strong northeasterly flow aided
by a high pressure system over the southern Appalachians will provide the
potential for continued coastal hazards as well as locally heavy rain
along the Atlantic Coast of Florida. Developing thunderstorms along the
southeast Florida coastline in particular may remain somewhat stationary
due to opposing flow aloft, while also containing intense rainfall rates.
A Marginal Risk (level 1/4) of Excessive Rainfall has been issued for this
region on Saturday and Sunday in order to highlight the threat of
localized flash flooding.
Snell
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
