Weather Underground midday recap for Monday,August 26,2013.
Wet weather with threats of flooding continued from the Desert Southwest
into the Central Great Basin on Monday, while hot weather and chances
of severe weather continued in the upper Midwest.
In the West, periods of widespread and frequent showers with embedded
thunderstorms and chances of locally heavy rainfall from parts of inland
southern California and Arizona into southern Nevada and Utah. Flood
and flash flood warnings and watches were issued for the region due to
recent and continued moderate to heavy rainfall. Burn areas from recent
fires were especially prone to flash flooding debris flow.
In the Central U.S., hot temperatures continued in the Midwest as an
upper level ridge of high pressure over the Central U.S. began to shift
to the east. Heat advisories remained in effect for portions of the
upper Midwest, from parts of the eastern Dakotas and eastern Nebraska
through western areas of Wisconsin and Illinois, as daytime highs
climbed into the 90s to near the 100 degree mark and heat indices
reached into the triple digits. An excessive heat warning was issued for
southern Minnesota as daytime maximum heat index values ranged between
100 and 110 across the region. Meanwhile, strong heating along and to
the southwest of a stalled frontal boundary extending form the Dakotas
eastward across central Minnesota triggered chances of thunderstorms in
South Dakota Minnesota and southwestern Wisconsin. Areas from the South
and North Dakota border through central Minnesota into Wisconsin
remained at slight risk of severe thunderstorm development with damaging
wind gusts and large hail from Monday afternoon through early Monday
night.
Further east, an associated warm front and weak wave of low pressure
kick up areas of showers in the Northeast as the disturbances trekked
toward the East Coast. To the south, showers and thunderstorms continued
near the Gulf Coast and across Florida.
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