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Wet weather with threats of flooding continued from the Desert Southwest into the Central Great Basin today, while hot weather and chances of severe weather continued in the upper Midwest.

In the West, there have been 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 a chance 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 this afternoon through early evening.

Further east, an associated warm front and weak wave of low pressure are kicking 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.

MONDAY'S WEATHER EXTREMES:

-HIGHEST TEMPERATURE (DEGREES F).........................102 Venice, La.

-HIGHEST HEAT INDEX (DEGREES F)..........................119 Venice, La.

-LOWEST TEMPERATURE (DEGREES F)..........................32 Truckee-Tahoe, Calif.

-LOWEST WIND CHILL (DEGREES F)...........................15 Anaktuvuk Pass, Alaska

-HIGHEST WIND GUST (MPH).................................61 Mt. Washington, N.H.

-HIGHEST PRECIPITATION (INCHES)..........................2.40 Hayward, Wis.

ON THIS DATE:

-On this date in 1883, the East Indies volcano Krakatoa exploded, and was heard 2,500 miles away. The air wave from the explosion was recorded by every barograph in the world. The biggest effect of this event was that the global temperature was lowered by 1 degree over the next two years due to the airborne ash from the explosion.

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