Expected

* WHAT...Sub-freezing temperatures expected. * WHERE...Portions of southeast Maryland and central, east central, north central, and south central Virginia. * WHEN...From 2 AM to 9 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...Sub-freezing temperatures expected. * WHERE...Portions of northeast North Carolina and central, east central, south central, and southeast Virginia. * WHEN...From 2 AM to 9 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.

...Forecast flooding changed from Minor to Moderate severity for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. * WHAT...Minor flooding is occurring. * WHERE...Des Plaines River from Palatine Road in Prospect Heights downstream to Irving Park Road in Chicago, including the Des Plaines gauge. * WHEN...Until further notice. * IMPACTS...At 18.5 feet, Big Bend Road threatened in Des Plaines. * ADDITIONAL DETAILS... - At 10:45 AM CDT Monday the stage was 18.0 feet.

* AFFECTED AREA...Much of central and western Minnesota. * TIMING...Until 8 PM CDT this evening. * WINDS...South winds 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...15 to 25 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. A red flag warning is issued when we identify weather conditions that promote rapid spread of fire which may become life-threatening. This does not mean there is a fire. These conditions are either occurring

The combination of low relative humidity values and southerly winds will result in elevated fire weather conditions for this afternoon across portions of northeast Iowa. Afternoon relative humidity values will fall to around 25 to 30 percent with winds of 10 to 20 mph, gusting to 25 to 30 mph. Under these conditions, fires will start and spread easily. Please exercise caution with any activities that involve outdoor fires or create sparks, including campfires, grilling, and

* 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 Nevada and southern Cascades above 5000 feet, including Highway 50, Interstate 80 and Lassen National Park. * WHEN...From 2 AM Tuesday to 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday and Wednesday commutes.

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Delaware, Fairfield, Hocking, and Licking Counties. * WHEN...From 11 PM this evening to 10 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps to protect tender plants from the cold.

WHAT...Strong winds from the south/southeast at 15 to 20 mph with gusts to 25-30 mph, dry surface vegetation, and low relative humidity between 25 and 30 percent will lead to elevated fire danger today. WHERE...Northern into parts of north-central Iowa. WHEN...11am until 7pm. IMPACTS...Any fires that ignite will spread rapidly. PREPAREDNESS AND PRECAUTIONARY ACTIONS...Burning is discouraged under these conditions. Also, take care to prevent the start of accidental fires when smoking or operating vehicles around dry vegetation.

* WHAT...Sub-freezing temperatures as low as 21 expected. * WHERE...Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN...From 8 PM this evening 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.

At 1119 AM EDT, a trained weather spotter reported a shower with small hail near Medford. A larger cluster of showers also capable of producing small hail was off to the south from Sayville to Shirley, moving east at 25 mph. HAZARD...Pea size hail. SOURCE...Trained weather spotter. IMPACT...Minor hail damage to outdoor objects is possible. Locations impacted include... Riverhead, Shirley, Medford, Manorville, Patchogue, Middle Island, Center Moriches, Westhampton, Sayville, Mastic, Mastic Beach,