* WHAT. Northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft expected. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. From 1 PM this afternoon to 6 PM EST Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft expected. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. From 1 PM this afternoon to 6 PM EST Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft expected. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. Through 6 PM EST Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. An extended period of temperatures up to 30 degrees below normal. Very cold wind chills of 0 to 15 degrees below zero. * WHERE. Portions of north-central and western Maryland, northwest and western Virginia, and eastern West Virginia. * WHEN. From 4 AM Monday to 1 PM EST Tuesday. * IMPACTS. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. An extended period of well below freezing temperatures could cause pipes to rupture.

* WHAT. Northwest winds 15 to 20 kt with gusts up to 30 kt. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, and Patuxent River to Broomes Island MD. * WHEN. Until 6 PM EST Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft. For the Freezing Spray Advisory, moderate accumulation of freezing spray expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. For the Small Craft Advisory, until 6 PM EST Monday. For the Freezing Spray Advisory, from midnight tonight to 6 PM EST Monday. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft. For the Freezing Spray Advisory, moderate accumulation of freezing spray expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. For the Small Craft Advisory, until 6 PM EST Monday. For the Freezing Spray Advisory, from midnight tonight to 6 PM EST Monday. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft. For the Freezing Spray Advisory, moderate accumulation of freezing spray expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 6 PM EST Monday. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. Northwest winds 10 to 20 kt with gusts up to 30 kt. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, and Patuxent River to Broomes Island MD. * WHEN. Until 6 PM EST Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 4 ft. For the Freezing Spray Advisory, moderate accumulation of freezing spray expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 6 PM EST Monday. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. An extended period of temperatures up to 30 degrees below normal. Very cold wind chills as low as 15 degrees below zero. * WHERE. Portions of north central and western Maryland, northwest and western Virginia, and the eastern panhandle of West Virginia. * WHEN. From 4 AM Monday to 1 PM EST Tuesday. * IMPACTS. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. An extended period of well below freezing temperatures could cause pipes to rupture.

* WHAT. Very cold wind chills as low as 5 degrees below zero expected. * WHERE. Portions of DC, central, northeast, and northern Maryland, and central, northern, and northwest Virginia. * WHEN. From 7 PM this evening to 10 AM EST Tuesday. * IMPACTS. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. To prevent water pipes from freezing, wrap or drain or allow them to drip slowly.

* WHAT. Very cold wind chills as low as 10 degrees below zero expected. * WHERE. Carroll and Frederick MD Counties. * WHEN. Until 1 PM EST Tuesday. * IMPACTS. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. An extended period of well below freezing temperatures could cause pipes to rupture.

* WHAT. An extended period of temperatures up to 30 degrees below normal. Very cold wind chills as low as 15 degrees below zero. * WHERE. Portions of north central and western Maryland, northwest and western Virginia, and eastern and panhandle West Virginia. * WHEN. Until 1 PM EST Tuesday. * IMPACTS. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. An extended period of well below freezing temperatures could cause pipes to rupture.

* WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 4 ft. For the Freezing Spray Advisory, moderate accumulation of freezing spray. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. For the Small Craft Advisory, until 5 AM EST Tuesday. For the Freezing Spray Advisory, until 6 PM EST this evening. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 4 ft. For the Freezing Spray Advisory, moderate accumulation of freezing spray. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. For the Small Craft Advisory, until 5 AM EST Tuesday. For the Freezing Spray Advisory, until 6 PM EST this evening. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. Northwest winds 10 to 15 kt with gusts up to 25 kt. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN. Until 6 PM EST this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Northwest winds 10 to 15 kt with gusts up to 25 kt. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN. Until 6 PM EST this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 25 kt. For the Freezing Spray Advisory, moderate accumulation of freezing spray. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, and Eastern Bay. * WHEN. For the Small Craft Advisory, until 5 AM EST Tuesday. For the Freezing Spray Advisory, until 6 PM EST this evening. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 25 kt. For the Freezing Spray Advisory, moderate accumulation of freezing spray. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, and Eastern Bay. * WHEN. For the Small Craft Advisory, until 5 AM EST Tuesday. For the Freezing Spray Advisory, until 6 PM EST this evening. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

At 1253 PM EST, a snow shower was located over Ellicott City, moving east at 20 mph. Locations impacted include. Baltimore, Columbia, Severn, Elkridge, Baltimore-Washington Airport, Historic Ellicott City, Ellicott City, Catonsville, Woodlawn, Arbutus, Ferndale, Brooklyn Park, Pumphrey, South Gate, Ilchester, Linthicum, Lansdowne, Hanover, West Friendship, and Woodstock. This includes the following highways. Interstate 70 in Maryland between mile markers 80 and 93. Interstate 95 in Maryland between mile markers 41 and 54. Visibilities may drop quickly to less than one mile, and roads may briefly become snow covered in some locations. Conditions can deteriorate rapidly in winter weather situations. Be prepared for snow covered roads. Slow down and allow extra time when traveling.

* WHAT. Northwest winds 10 to 15 kt with gusts up to 25 kt. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN. Until 6 PM EST this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 25 kt. For the Freezing Spray Advisory, moderate accumulation of freezing spray. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, and Eastern Bay. * WHEN. For the Small Craft Advisory, until 5 AM EST Tuesday. For the Freezing Spray Advisory, until 6 PM EST this evening. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 25 kt. For the Freezing Spray Advisory, moderate accumulation of freezing spray. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, and Eastern Bay. * WHEN. For the Small Craft Advisory, until 5 AM EST Tuesday. For the Freezing Spray Advisory, until 6 PM EST this evening. * IMPACTS. Operating a vessel in freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Ice accretion on decks and superstructures may result in some loss of stability. Conditions will be hazardous to small craft.

* WHAT. Very cold wind chills as low as 5 degrees below zero expected. * WHERE. Portions of DC, central, northeast, and northern Maryland, and central, northern, and northwest Virginia. * WHEN. From 7 PM this evening to 10 AM EST Tuesday. * IMPACTS. The cold wind chills could result in hypothermia if precautions are not taken.

* WHAT. Very cold wind chills as low as 10 degrees below zero. * WHERE. Portions of north central and western Maryland, northwest and western Virginia, and eastern West Virginia. * WHEN. Until 1 PM EST Tuesday. * IMPACTS. The cold wind chills could result in hypothermia if precautions are not taken.

* WHAT. Very cold wind chills as low as 10 to 15 below zero expected. * WHERE. Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon, Perry, and York Counties. * WHEN. From 7 PM this evening to noon EST Wednesday. * IMPACTS. Frostbite and hypothermia are possible if precautions are not taken.