Many people across the United States have outdoor events planned for Labor Day,the unofficial end to summer. The nation's midsection is at greatest risk forthe weather to spoil those activities.Vigorous low pressure trailing a cold front through the nation's midsectionwill spark a few showers and thunderstorms over the Upper Midwest to centralPlains this Labor Day. Some thunderstorms threaten to turn severe during theafternoon in an area centered upon southern and eastern Iowa, including CedarRapids.
A few showers will spill well eastward from this low, perhaps putting a damperon outdoor activities from the upper Great Lakes to northern Maine.
A steadier rain, locally heavy, will wet much of the Dakotas. On top of this,temperatures across these two states will be generally held to the 60s.
Cooling will sweep into western Kansas and eastern Colorado behind the coldfront, but 90-degree heat spread over the southern Plains will reach as farnortheast as about Kansas.
The expanse of cool air will also reach across the northern and central Rockiesto the Pacific Northwest, holding temperatures well below highs that aretypical for early September.
California and Arizona will feel little or no cooling. Instead, bright sunshinewill abound. Southern California will have a cooling onshore flow and also somelow clouds.
Eastern high pressure will begin a warm-up from the Ohio Valley and southernGreat Lakes to the Eastern Seaboard. It will start cool, and humidity will stayfairly low, but temperatures will recover enough to benefit beachgoers.
Low humidity and strong sunshine will also dominate most of the South with lowhumidity offsetting the above-normal daytime temperatures.
Farther south, steamy air will remain in placeWeather HeadlinesSun, 05 Sep 2010 14:18:11 ESTIWS0Sun, 05 Sep 2010 13:52:16 ESTLabor Day Weather OutlookVigorous low pressure trailing a cold front through the nation's midsectionwill spark a few showers and thunderstorms over the Upper Midwest to centralPlains this Labor Day. Some thunderstorms threaten to turn severe during theafternoon in an area centered upon southern and eastern Iowa, including CedarRapids.A few showers will spill well eastward from this low, perhaps putting a damperon outdoor activities from the upper Great Lakes to northern Maine.
A steadier rain, locally heavy, will wet much of the Dakotas. On top of this,temperatures across these two states will be generally held to the 60s.
Cooling will sweep into western Kansas and eastern Colorado behind the coldfront, but 90-degree heat spread over the southern Plains will reach as farnortheast as about Kansas.
The expanse of cool air will also reach across the northern and central Rockiesto the Pacific Northwest, holding temperatures well below highs that aretypical for early September.
California and Arizona will feel little or no cooling. Instead, bright sunshinewill abound. Southern California will have a cooling onshore flow and also somelow clouds.
Eastern high pressure will begin a warm-up from the Ohio Valley and southernGreat Lakes to the Eastern Seaboard. It will start cool, and humidity will stayfairly low, but temperatures will recover enough to benefit beachgoers.
Low humidity and strong sunshine will also dominate most of the South with lowhumidity offsetting the above-normal daytime temperatures.
Farther south, steamy air will remain in place across the Florida Peninsula tothe western Gulf Coast, providing fuel for scattered, drenching thunderstorms.
Low pressure having tropical characteristics near eastern Mexico, being watchedfor further development, could unleash numerous drenching storms over SouthTexas.
Story by AccuWeather.com Senior Meteorologists Kristina Pydynowski and JimAndrews
