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A fairly stagnant weather pattern remained over the nation on Tuesday and supported continued heat in the West and another round of showers and storms in the East.

Out West, another extremely hot day developed across parts of the western states as an expansive ridge of high pressure remained dominant over the Great Basin. Temperatures in parts of California, the Desert Southwest, and the Great Basin were expected to reach well past the century mark, while highs ranging from the upper 90s to the lower 100s were possible from parts of the Pacific Northwest interior through areas of western Montana.

Excessive Heat Warnings persisted from western Arizona through most of California and Nevada, as outside activities remained dangerous for the region. Heat Advisories also continued for areas of northwestern Nevada through parts of Washington, northern Idaho, and northwestern Montana.

Hot and dry conditions coupled with dry thunderstorm potential in parts of central Arizona, northwestern Nevada, southeastern Oregon, and extreme northeastern California kept fire danger high through the day. Meanwhile, chances of scattered storms will continued from parts of eastern Colorado into the Southern Rockies and western Texas. The Storm Prediction Center issued a slight risk of severe thunderstorm development for the Southern Rockies and Southern High Plains with primary threats of damaging wind gusts and possible tornadoes.

In the East, hot and humid weather continued for the eastern third of the nation as the region remained in between a retrograding upper trough of low pressure over the Mid-U.S. and a blocking ridge of high pressure in the western Atlantic Ocean. Ample warm, moist flow streamed in from the south-southwest into the Eastern Seaboard and led to muggy conditions with showers and storms through the day.

A variety of Flood Watches and Warnings were issued from parts of the Northeast through central Georgia in anticipation of heavy rainfall. Additional showers and thunderstorms developed in the Great Lakes and Ohio Valley.

TUESDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................109 Las Vegas, Nev.

HIGHEST HEAT INDEX (DEGREES F)..........................106 Redding, Calif.

LOWEST TEMPERATURE (DEGREES F)..........................35 Silver Bay, Minn.

LOWEST WIND CHILL (DEGREES F)...........................30 Kuparuk, Alaska

HIGHEST WIND GUST (MPH).................................60 China Lake, Calif.

HIGHEST PRECIPITATION (INCHES)..........................2.35 Morganton, N.C.

ON THIS DATE....... A few interesting facts occurred on this date in history. In 1843, an alligator reportedly fell from the sky during a Charleston, SC thunderstorm. Now that the absurd is out of the way, Santa Barbara, CA recorded its hottest ever temperature of 109 degrees in 1985.

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