There is a risk of regional damaging thunderstorms and flash flooding Thursday into Friday over the Great Plains to part of the Upper Midwest.
During Thursday into Thursday night, thunderstorms will organize into several complexes that can bring adverse impact to outdoor plans and travel from Oklahoma City to Kansas City, Omaha, Neb., and Minneapolis.
The storms will sprawl over an area more than 250,000 square miles and can affect approximately 10 million people over the Central states.
One or two groups of storms will affect parts of Kansas to Oklahoma and northern Texas Thursday into Thursday night. These storms bring an elevated risk of flash and urban flooding, as well is isolated damaging wind gusts.
Since the middle of May, Oklahoma City has received 2 feet of rain, which is more than double the city's average rainfall.
Farther north, one or two groups of storms will push out of the Dakotas and move across Minnesota and into Wisconsin, Iowa and Nebraska Thursday into Thursday night. These storms bring an elevated risk of damaging wind gusts and hail but can also bring isolated flash and urban flooding.
During Friday, the threat of strong to locally severe thunderstorms and the potential for flash and urban flooding will reach from northern Texas to Michigan. Cities that could be affected Friday include Dallas and Chicago.
A very small number of the storms throughout the Plains and Upper Midwest can also produce a short-lived tornado.
People should remain alert for rapidly changing weather conditions.
Remember never to drive through flooded roads, and seek shelter indoors at the first sign of a storm's approach. If you can hear thunder, you are at risk for being struck by lightning.
The storms are preceding a push of cooler air for the weekend taking aim over the northern and central Plains to the Midwest. Seasonable temperatures are in store for the southern Plains.
The worst of the ice headed to the eastern U.S. will focus on the I-81 corridor from Virginia to southern Pennsylvania.
While heavy snow and ice are not expected to fall over much of the Midwest Sunday into Monday, some slippery roads and travel disruptions are likely.
As the saying goes, no two snowflakes are exactly alike. Russian photographer Alexey Kljatov's collection of high-resolution magnified flakes makes this widely-held belief more convincing.
Fresh cold and the return of Santa Ana winds are in store for Southern California to start the new week.
Tropical Cyclone Madi has developed over the Bay of Bengal, northeast of Sri Lanka and east of India.
A magnitude 4.5 earthquake shook the ground near Jones, Okla., Saturday afternoon.
Louisville, KY (1885)
15.0" snow set 24 hour snowfall record and single storm total for city (7th-8th).
Cairo, IL (1917)
17.0" snow set 24 hour snowfall record and single storm total for city.
Connecticut River (1740)
Early snows and hard freeze followed by a thaw and heavy rains produced the greatest flood on Connecticut River in 50 years; on Merrimac in 70 years.