…Severe thunderstorms possible across the central to northern High
Plains through Wednesday with flash flood potential continuing over the
Southwest…
…Record breaking heat continues across Texas…
After several days of active and unsettled weather, the cold front across
the eastern U.S. has finally largely cleared the coast, aside from coastal
Maine where a few lingering showers will remain possible through this
morning. Otherwise, sprawling high pressure will encompass much of the
Great Lakes region through the East, bringing much drier conditions and
generally below normal temperatures for the next couple of days. High
temperature departures of 10 to nearly 20 degrees for mid-August are
expected for Great Lakes and Northeast. Plan on highs only in the 60s and
70s for many areas from the Midwest to northern Mid-Atlantic and
Northeast. This high pressure is expected to dominate the weather story
for the region through at least mid-week, from the Mississippi River to
the Appalachians.
A nearly stationary front will settle to its south across the Gulf Coast
region and then extending northward across the High Plains, along the
western periphery of the high pressure axis. This boundary, along with
interactions with another passing weather system passing through the
Northern Rockies, will bring threats for severe thunderstorms to much of
the central and northern High Plains through Wednesday. The Storm
Prediction Center is advertising a Slight Risk (Level 2 of 5) for severe
weather including damaging winds and large hail.
Meanwhile, deep monsoonal moisture persistent over the Southwest U.S. will
bring a daily threat of localized and isolated flash flooding. Slow moving
but intense rainfall producing thunderstorms are possible across portions
of Arizona, Utah, Colorado, and New Mexico. For today, the threat appears
to be fairly localized, a greater threat will exist for Wednesday across
northern Arizona where a Slight Risk (Level 2 of 4) of excessive rainfall
and flash flooding exists.
Finally, underneath a strong upper level ridge, record breaking heat will
continue for at least a couple more days across portions of Texas and
southern Oklahoma. Excessive Heat Warnings and Heat Advisories remain in
effect and many daily record high temperatures will be possible as
temperatures soar into the 90s and triple digits. Combined with the
oppressive humidity, daily maximum heat indices up to 110F will be
possible. This will create a dangerous situation for some groups,
particularly anyone spending large amounts of time outdoors. They will be
at a heightened risk of heat-related illness. Some of the heat is expected
to spread into eastern New Mexico by the middle/end of the week.
Taylor
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
