Weather Underground midday recap for Thursday, July 21, 2016
Strong storms battered the Midwest on Thursday, while extreme heat impacted the Southwest.
A cold frontal boundary extended southwestward from the western Great Lakes to the Intermountain West. As this frontal system shifted eastward, it produced strong to severe thunderstorms across the Midwest. Wausau, Wis., reported 1.00 inch sized hail. Houghton, Mich., reported a midday total of 1.24 inches of rain. Anomalously warm temperatures also lingered over the Plains and the Midwest. Excessive heat warnings remained in effect for South Dakota, Nebraska, Kansas, Missouri, Iowa, southern Minnesota, western Wisconsin, Illinois and western Kentucky. Des Moines, Iowa, recorded a midday high of 93 degrees with a heat index of 106 degrees.
Subtropical moisture and daytime heating kept showers and thunderstorms in the picture for the Deep South and the Southeast. Severe thunderstorm warnings were issued for parts of the lower Mississippi Valley and the Southeast. Newnan, Ga., reported seven trees down due to strong winds.
Out west, isolated showers and thunderstorms fired up across the Four Corners due to monsoonal moisture and daytime heating. Flash flood watches were issued in northwest Colorado. High pressure brought very hot weather to the Southwest. Excessive heat warnings and heat advisories were issued in parts of southern California and Arizona. Palm Springs, Calif., recorded a midday high of 110 degrees. Phoenix, Ariz., recorded a midday high of 105 degrees.
Temperatures in the Lower 48 states Thursday have ranged from a morning low of 32 degrees at West Yellowstone, Mont. to a midday high of 111 degrees at Imperial, Calif.