Expected

* WHAT...Sub-freezing temperatures as low as 26 to 30 degrees expected. * WHERE...Portions of central, north central, northeast, and northern Maryland, central, northern, northwest, and western Virginia, and panhandle West Virginia. * WHEN...From 2 AM to 10 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until further notice. * IMPACTS...Numerous roads, yards, structures, and park land are expected to flood along the Fox River Chain of Lakes. * ADDITIONAL DETAILS... - At 438 PM CDT, River gauges along the Fox River Chain of Lakes indicated water levels continuing to rise slowly. Water levels exceeded moderate flood stage earlier today. The

* WHAT...Sub-freezing temperatures in the mid 20s to around 30. * WHERE...Portions of east central Ohio, western Pennsylvania, and northern West Virginia. * WHEN...From 11 PM this evening to 9 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. Take steps now to protect tender plants from the cold.

At 501 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm over Intersection Krome And U.S. 27, or near Miramar, moving east at 10 mph. HAZARD...Wind gusts of 45 to 50 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Pembroke Pines, Miramar, Davie, Miami Lakes, Cooper City,

* WHAT...Southwest winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Portions of northwest, southwest, and west central Colorado and east central, northeast, and southeast Utah. * WHEN...From 9 AM to 9 PM MDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

* WHAT...Heavy snow likely above 5000 feet. Total snow accumulations of up to 12 to 18 inches, with up to 2 feet at the highest peaks. Minor accumulations of up to 2 inches possible down to 4500 feet. Southwest winds could gust as high as 50 mph. * WHERE...Sierra (El Dorado-Amador) Above 5000 ft, Lassen Volcanic NP, Sierra (Cal-Tuo) Above 5000 ft, Sierra (Sierra-Placer) Above 5000 ft, and Sierra (Tehama-Plumas) Above 3000 ft Counties. * WHEN...From 2 AM Tuesday to 5 PM PDT Wednesday.

Clear skies and weak northeasterly flow late tonight may cause isolated frost in our northeastern counties, specifically in river valleys that may dip into the low to mid 30s before sunrise. Probabilities are low (

* WHAT...South winds 25 to 40 mph with gusts up to 60 mph are expected. * WHERE...The Shasta Valley in Central Siskiyou County. This includes the portion of Interstate 5 from Weed to Hilt, including the cities of Yreka, Grenada, and Montague. * WHEN...Until 6 PM PDT this evening. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. People are urged to secure loose objects that could be blown around

* WHAT...South winds 230 to 40 mph with gusts up to 50 mph are expected. * WHERE...The Shasta Valley in Central Siskiyou County. This includes the portion of Interstate 5 from Weed to Hilt, including the cities of Yreka, Grenada, and Montague. * WHEN...Until 6 PM PDT this evening. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. People are urged to secure loose objects that could be blown around

* WHAT...Wet snow expected. Total snow accumulations 5 to 10 inches above 5000 feet. Winds gusting as high as 45 mph over high and exposed terrain. * WHERE...The higher terrain of southern Siskiyou County near the Trinity Alps. This includes Highway 3 south of Callahan. * WHEN...Until 11 AM PDT Tuesday. * IMPACTS...Travel may be very difficult. The hazardous conditions could impact the Monday evening and Tuesday morning commutes. Gusty winds could bring down tree branches.