…Strong to severe thunderstorms will be possible over the holiday
weekend from the Southern Plains to the High Plains; more flooding remains
possible over saturated west-central Texas…
…Threat of heavy rain increasing for coastal Carolinas due to T.D. Three
located off the southeast U.S. coast…
…Heat and humidity will be migrating eastwards across the Great Lakes
region towards the East Coast through the Holiday weekend, with notable
population centers entering the Major Heat Risk category…
On this 4th of July and into the holiday weekend, stormy weather will
likely be found across the northern Rockies, High Plains, and into the
upper Midwest ahead of a lifting warm front, followed by a cold front
marching through the region. For tomorrow, the Storm Prediction Center has
a tarted Slight Risk from Montana and Wyoming eastward to the High Plains.
The main threats will be damaging winds and large hail. Additional
thunderstorms across the Plains on Sunday may also produce hail with steep
lapse rates noted by the Storm Prediction Center.
In terms of flooding and heavy rain, west-central Texas will have the
biggest threat for impacts from flash flooding. A MCS, associated with the
remnants of Barry, across parts of Texas has dropped several inches of
rainfall across the region from Thursday night and this afternoon.
Saturated soils and river flooding make this area sensitive to more
rainfall. The forecast calls for locally heavy rainfall to persist into
tomorrow as anomalous moisture and mid-level energy provide a conducive
atmosphere for possible continued flooding. Therefore, WPC has issued a
Slight Risk for Excessive Rainfall across the area on Saturday. Other
areas of heavy rain for Saturday will again focus on Florida and the
Carolina coastline as high moisture content in the atmosphere from a
tropical low being monitored by the Hurricane Center will support heavy
rainfall rates within rain bands and diurnal thunderstorms. The threat for
heavy rain will continue for the Carolinas on Sunday with the tropical
low. Additionally, clusters of storms that form ahead of a cold front in
the High Plains and Upper Midwest on Saturday and across the Central
Plains and Mississippi Valley on Sunday will also be be capable of
producing heavy rainfall and potential flash flooding.
Near the coast of the southeastern U.S., T.D. Three has formed along a
surface trough. In general, locally heavy rainfall and squally weather
will be the main weather hazards across the Southeast coastline. See the
latest forecast from the National Hurricane Center for more information.
Temperatures will be on the rise from the Great Lakes to the East Coast as
mid-level ridging shifts across the region. This weekend will see cities
such as Chicago, Detroit, Indianapolis, and Boston entering the Major Heat
Risk category. High temperatures in the low to middle 90s may produce
dangerous heat impacts. Stay hydrated and take cool breaks.The West will
generally be cooler than average, at least relative to July standards, as
a trough and surface front are located over the region.
Kong/Wilder
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
