Weather Underground midday recap for Friday, July 19, 2013.
Active weather continued across the nation on Friday, with showers and
thunderstorms across the Great Lakes, monsoonal storms in the Southwest,
and hot conditions over the East. A ridge of high pressure over the
Eastern Seaboard maintained northward flow from the Gulf of Mexico. This
maintained warm and humid conditions across the Eastern Valleys. Heat
advisories remained in effect from the Midwest through the Northeast as
high temperatures remained in the mid- to upper 90s, with heat index
values over 100 degrees. The highest heat index value was reported at
Lakehurst, New Jersey with a mid-day heat index value up to 121 degrees.
Just to the north, a low pressure system over eastern Canada created a
cold front that moved over the Great Lakes and into the Ohio River
Valley. Showers and thunderstorms developed along this front, some of
which turned severe with strong winds and large hail. Numerous trees and
power lines were reported down across Michigan. In the Southeast, warm
and humid conditions allowed for afternoon shower and thunderstorm
activity. Scattered storms developed from Texast through the Virginias,
while an area of low pressure in the Gulf of Mexico brought heavy
rainfall and strong storms to parts of western Florida and the panhandle
of Florida.
Meanwhile out West, a monsoonal moisture continued to stream northward
across the Desert Southwest. Periods of heavy rainfall were associated
with these storms, thus, flash flood watches have been issued for parts
of Colorado, Utah, and New Mexico.
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