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A cold front interacted with a warm, humid air mass from the Gulf of Mexico today, bringing heavy rain and thunderstorms across a handful of states in the central Plains and lower Mississippi Valley.

Tornado warnings were issued in northeast Arkansas, while flash flood warnings were issued in southeast Arkansas. Flash flood watches were also issued across several other states, including southern Nebraska, Kansas, eastern Oklahoma, southwest Missouri, northeast Mississippi, central Tennessee and northern Alabama.

Greenwood, Mississippi, reported a midday total of 3.30 inches of rain, while Texarkana, Arkansas, reported a midday total of 2.55 inches. In addition, an area of low pressure ushered scattered showers across parts of the Ohio Valley and the Northeast, while conditions remained mostly clear across the remainder of the Eastern Seaboard.

A separate cold front extended across the northern Plains and the upper Midwest. A low pressure system along the eastern end of the frontal boundary pushed scattered showers across parts of northeast Minnesota. Meanwhile, high pressure kept conditions clear across the western third of the country.

Excessive heat warnings were issued in southeast California, southern Nevada and northwest Arizona. Blythe, California, recorded a midday high of 102 degrees, while Victorville, California, recorded a midday high of 100 degrees.

MONDAY'S WEATHER EXTREMES:

-HIGHEST TEMPERATURE (DEGREES F).........................102 China Lake, Calif.

-HIGHEST HEAT INDEX (DEGREES F)..........................106 Kingsville NAS, Texas

-LOWEST TEMPERATURE (DEGREES F)..........................24 Monarch Pass, Colorado

-LOWEST WIND CHILL (DEGREES F)...........................11 Wolf Creek Pass, Colorado

-HIGHEST WIND GUST (MPH).................................75 Jackson Hawkins Field, Mississippi

-HIGHEST PRECIPITATION (INCHES)..........................3.30 Greenwood, Mississippi

ON THIS DATE:

-Lightning struck "Tire Mountain" near Denver, Colorado in 1987, burning 2 million out of the 6 million tires stored at the facility. Two years later, a tornado crossed Ben Franklin Bridge over the Delaware River, but did not cause any damage to the bridge.

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