Expected

* WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Avery, Mitchell, and Yancey Counties. * WHEN...From midnight tonight 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. In-ground sprinkler systems should be drained. Remove hoses and cover above- ground pipes.

* WHAT...Heavy snow above 7000 feet. Snow accumulations of 6 to 12 inches above 7000 feet with up to 18 inches on highest mountain peaks. 1 to 5 inches of snow possible for communities along Highway 395. Southerly wind gusts of 40 to 50 mph across lower elevations with gusts up to 60 mph in wind prone locations. Wind gusts up to 90 mph along ridges. * WHERE...Mono County. * WHEN...From 5 AM Tuesday to 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult through Sierra passes.

* WHAT...Heavy snow above 6500 feet. Snow accumulations of 4 to 10 inches above 6500 feet with 12 to 18 inches along highest mountain peaks. 1 to 4 inches of snow possible at lake level, highest on the western shores. Wind gusts of 30 to 35 mph across lower elevations, including Lake Tahoe where wave heights reach 1 to 3 feet. Ridgetop winds gusting up to 90 mph at times. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 AM Tuesday to 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult through Sierra passes.

* WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Granville and Person Counties. * WHEN...From 2 AM to 8 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Low temperatures of 28 to 32 in sheltered valleys will allow for a light freeze tonight. Taller ridges should remain above freezing, but patchy frost is still possible. * WHERE...Portions of east central, northeast, and southeast Kentucky. * 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.

* WHAT...Temperatures in the mid to upper 20s expected. * WHERE...Portions of northwest North Carolina, southwest Virginia, and southeast West Virginia. * WHEN...From midnight tonight to 9 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation, and they may possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Temperatures near 30 expected. * WHERE...Caswell, Rockingham, Stokes, Surry, Wilkes, and Yadkin counties in northwest North Carolina. * WHEN...From midnight tonight 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.

...Forecast flooding changed from Moderate to Major severity for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, Kane and McHenry Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater, Montgomery...Major flooding is forecast. * WHAT...Moderate flooding is occurring and major flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge.

* WINDS...South-southwesterly with sustained speeds near 15 to 20 mph and gusts near 25 to 30 mph. * RELATIVE HUMIDITY...As low as 10 to 15 percent for areas west of Highway 281, as low as 15 to 20 percent for areas along and east of Highway 281. * IMPACTS...Any fire that develops will spread quickly. Outdoor burning is not recommended. A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of

* WHAT...Heavy snow possible. Total snow accumulations 3 to 5 inches above 7,000 feet, with 12 to 18 inches possible at the highest elevations of the Sierra Nevada. Winds could gust as high as 75 mph along the Sierra crest. * WHERE...Kaiser to Rodgers Ridge, Kings Canyon NP, Sequoia NP, Upper San Joaquin River, and Yosemite NP outside of the valley. * WHEN...From 2 AM Tuesday to 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult to impossible. The