…Additional heavy rains possible across portions of the Central
Appalachians, but an end is in sight for the recent very wet pattern…
…Record heat to continue across California into the Desert Southwest…
…An elevated to critical fire weather threat continues from the Central
to Northern Plains into the Great Basin and Northwest…
The mid to upper level closed low initially across the Ohio to Tennessee
Valley region will continue to be a heavy precipitation producer over the
next two days as it pushes very slowly eastward and begins to weaken.
Areas of moderate to heavy rain are expected on the east and northeast
portion of this circulation where sustained low level east southeasterly
flow in an axis of much above average moisture values will impact areas of
the Central Appalachians from West Virginia into northwest Virginia and
far western Maryland. Across these areas, additional rainfall totals of 1
to 2 inches are possible, with localized totals approaching 5 inches.
These rains will be falling across areas that have received very heavy
rains over the past several days. With soils saturated and stream flows
well above average from these recent rains, flash and river flooding will
be a significant concern, with flood watches currently in effect across
these regions. The good news is that this mid to upper level low will
weaken and push off the Mid-Atlantic coast by late Tuesday/early
Wednesday, bringing a period of much drier weather for this area.
No let up in sight to the potential for record heat across large portions
of California into the Desert Southwest over the next few days. An upper
ridge is forecast to re-strengthen from California into the Great Basin
and Desert Southwest, supporting an expansion of major heat risk
conditions across much of California into southern Nevada and southwest
Arizona. High temperatures are expected to be 10 to 20 degrees above
average both Monday and Tuesday across these areas, supporting the
potential for numerous record high temperatures. Excessive heat warnings
are currently in effect across western to southwest Arizona into far
southern Nevada and portions of southeast California, while heat
advisories are in effect over portions of coastal central to northern
California. These Excessive Heat Warnings and heat advisories are
currently affecting nearly 21 million people.
An elevated to critical fire weather threat will continue today into
Monday from portions of the Northern Great Basin/Northern Rockies,
eastward into the Northern to Central Plains. A fast moving strong cold
front will be moving eastward across these areas with gusty winds both
ahead of and behind this front. Little if any precipitation is expected
with this front, with the low relative humidities and high winds
contributing to the significant threat of fire weather conditions.
Currently Red Flag warnings are in effect across these areas, affecting
over 3 million people.
Oravec
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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