Weather Underground midday recap for Wednesday, May 25, 2016

Multiple clusters of thunderstorms broke out across the Plains and the Mississippi Valley on Wednesday, while a ridge of high pressure focused over the Southeast.

A deep trough of low pressure transitioned slowly across the Southwest. Temperatures remained 10 to 20 degrees below normal across the Pacific Northwest, the Southwest and the Intermountain West. Grand Canyon, Ariz., recorded a morning low of 26 degrees. Big Bear City, Calif., also recorded a morning low of 26 degrees. Cool air, combined with daytime heating, triggered showers and isolated thunderstorms from the Sierra Nevada to the upper Intermountain West.

Just to the east, strong to severe thunderstorms fired up across portions of the central Plains, the northern Plains, the middle Mississippi Valley, the upper Mississippi Valley and the Tennessee Valley. Flood warnings were issued from the northern high Plains to the lower Mississippi Valley. Okmulgee, Okla., reported a midday total of 2.93 inches of rain. Siloam Springs, Ark., reported a midday total of 2.09 inches of rain.

Most of the East Coast experienced dry weather on Wednesday due to a ridge of high pressure over the southern Mid-Atlantic. Temperatures rose into the 80s and 90s across the Deep South and the Southeast. Kingsville, Texas, recorded a midday high of 89 degrees with a heat index of 106 degrees. Alexandria, La., recorded a midday high of 88 degrees.

Temperatures in the Lower 48 states Wednesday have ranged from a morning low of 24 degrees at Bryce Canyon, Utah to a midday high of 97 degrees at Midland, Texas