…Considerable flooding associated with Tropical Storm Debby to impact
portions of South and North Carolina…
…Monsoon storms continue across the Southwest and Four Corners regions…
…Excessive heat from the Southern Plains to the Lower Mississippi Valley
through Thursday…
Tropical Storm Debby is forecast to restrengthen a bit and re-curve toward
the Southeast today before making landfall along the central South
Carolina coast tonight. Debby is expected to produce an additional 3 to 9
inches of rainfall with locally higher amounts, leading to maximum amounts
as high as 25 inches in South Carolina and 15 inches in southeast North
Carolina through Friday. There is a High Risk (at least 70%) of Excessive
Rainfall leading to Flash Flooding over portions of the Carolina coast
today before expanding into inland areas on Thursday as Debby moves
onshore. The Storm Prediction Center issued a Slight Risk of Severe
Thunderstorms for portions of eastern North Carolina and southeast
Virginia for Thursday with a risk of tornadoes present.
Evening storms produced by tropical moisture from Debby interacting with a
cold front from the north will support heavy rainfall over parts of
eastern Maryland, Delaware, southeastern Pennsylvania and southern New
Jersey this evening. A Slight Risk (at least 15%) of Excessive Rainfall is
in effect for the aforementioned areas to account for some instances of
flash flooding from the evening convection. Elsewhere, monsoonal storms
are expected to continue across the Southwest and Four Corners regions
through the latter part of this week. Flash flooding concerns increase on
Thursday and Friday over portions of the Central/Southern High Plains
including the Sangre De Cristo Mountains, where a Slight Risk of Excessive
Rainfall is in effect. Scattered showers and thunderstorms will track
across the Northern Plains and Upper Midwest over the next couple of days
beneath a strengthening upper-level low.
A unseasonably cool air mass will descend upon the Great Plains behind a
strong cold front beginning today. High temperature anomalies between
15-25 degrees below average are expected to expand from the Northern
Plains today into the Central Plains on Thursday. Meanwhile, a heat wave
will grip portions of the Southern Plains and Lower Mississippi Valley
through the end of the work week, with highs in the 100s and lows in the
upper 70s to low 80s creating widespread Major to isolated Extreme
HeatRisk. The lack of overnight relief in these areas will pose a
potential risk to those without effective cooling and/or adequate
hydration. Heat Advisories are in effect for today.
Kebede
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
