Strong thunderstorms will continue to move through the area for the next several hours. The most concentrated storms will be along and east of Interstate 35...where rainfall rates of 1 to 2 inches per hour are likely. Strong storms north and west of Waterloo will track southeast through the Waverly...Cedar Falls...and Waterloo areas with winds in excess of 50 mph and hail up to dime size possible by 430 am.
Forecast for Grundy
Updated: 3:34 am CDT on July 10, 2009
Today
Thunderstorms likely in the morning...then scattered thunderstorms early in the afternoon. Thunderstorms likely late in the afternoon. High around 80. Southeast wind near 10 mph. Chance of thunderstorms 70 percent.
Partly cloudy. A chance of thunderstorms through midnight...then a slight chance of thunderstorms after midnight. Low around 60. Southeast wind near 10 mph shifting to the north after midnight. Chance of thunderstorms 40 percent.
Saturday
Mostly sunny. High in the lower 80s. Northeast wind 10 to 15 mph becoming north up to 5 mph in the afternoon.
Partly cloudy. Low around 60. West wind near 5 mph shifting to the north after midnight.
Sunday
Partly sunny with a 20 percent chance of thunderstorms. Breezy. High in the lower 80s. South wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon.
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for... northeastern Grundy County in central Iowa... southeastern Butler County in north central Iowa... Black Hawk County in northeast Iowa... Bremer County in northeast Iowa...
* until 415 am CDT
* at 326 am CDT... National Weather Service Doppler radar indicated a severe thunderstorm capable of producing quarter size hail... and damaging winds in excess of 60 mph. This storm was located near New Hartford... or 14 miles northwest of Waterloo... and was moving southeast at 40 mph.
* The severe thunderstorm will be near... Cedar Falls and Waterloo Airport by 340 am CDT... Waterloo and Hudson by 345 am CDT... Evansdale... Elk Run Heights and Raymond by 355 am CDT... Gilbertville by 400 am CDT... La Porte City by 410 am CDT...
This includes Interstate 380 between mile markers 57 and 73.
Precautionary/preparedness actions...
Move to an interior room and stay away from windows. If you live in a Mobile home... seek shelter in a sturdy building.