Weather Underground midday recap for Tuesday, July 16, 2013.
Wet weather continued for the Southern Plains and the Southwest on Tuesday as an upper low over the Southern Plains shifted to the west. This system, combined with moist, favorable environmental conditions, kick up moderate to heavy rainfall and slow moving thunderstorms, especially in parts of west Texas from the southern Panhandle to Big Bend country. Excessive rainfall increased the potential for runoff and flooding. A Flash Flood Watch has been issued for the region in anticipation of Tuesday¼'s precipitation.
In the East, hot and humid conditions developed across the East and parts of the Midwest as a subtropical ridge of high pressure over the Eastern U.S. shifted westward. Hot temperatures and high heat index values led to various Heat Advisories and Excessive Heat Warnings from areas of southeastern New Hampshire through northern Delaware. Additional Heat Advisories were issued in upstate New York, Michigan, southwestern Wisconsin, southeastern Minnesota, and northeastern Iowa. Elsewhere in the East, scattered showers and thunderstorms with areas of localized flooding continued in the Southeast.
Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 41 degrees at West Yellowstone, Mont. to a midday high of 106 degrees at El Centro, Calif.