Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Tsunami impacts continue for portions of the Pacific basin. Wildfire smoke causes unhealthy air in Midwest to Great Lakes. Heat dome spans Mississippi Valley to Mid-Atlantic with excessive heat warnings and advisories. Critical fire weather in Great Basin to Pacific Northwest (dry thunderstorms). Cold front spawns severe storms/heavy rain in Central U.S. today, shifts to East Coast Thursday. Read More >

May 1-2, 2010
Thunderstorms & Flooding

A slow-moving cold front interacted with an unseasonably moist late-spring airmass over the Ohio Valley May 1 and 2. This led to numerous rounds of rain and thunderstorms, some of which produced widespread heavy rain. The heaviest rain fell across southern Ohio and Kentucky, where numerous reports of flooding were received. Rainfall amounts ranged from 1-2" across southern and central Ohio, to 2-4" near and south of the Ohio River, with some reports exceeding 5".