Please stay tuned to this page for updates and/or changes to this National Weather Service(NWS) Message. As the storm comes closer, the NWS will update or modify any existing warnings, and/or watches.
Calvert County
Charles County
St. Mary’s County
UPDATED Snow Totals in top image 9:00 p.m.
URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
435 AM EST Thu Jan 4 2018
Prince Georges-Anne Arundel-Charles...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM EST THIS
MORNING...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO NOON EST FRIDAY...* WHAT...Snow this morning. Very cold wind chills expected late
this evening through Friday morning. Plan on slippery road
conditions, including during the morning commute. Total
accumulations 1 to 3 inches expected. Expect wind chills to
range from 0 to 10 below zero late this evening through Friday
morning.
* WHERE...Portions of the Baltimore-Washington metro area along
and just east of Interstate 95.
* WHEN...For the Winter Weather Advisory, until 11 AM EST this
morning. For the Wind Chill Advisory, from 10 PM this evening
to noon EST Friday.
* ADDITIONAL DETAILS...Be prepared for reduced visibility at
times from snow this morning. The cold wind chills will cause
frostbite in as little as 30 minutes to exposed skin.
Northwest winds will average between 20 and 30 mph with gusts
around 40 mph through this evening...decreasing to 15 to 25
mph later tonight.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Winter Weather Advisory for snow and blowing snow means periods
of snow and blowing snow will cause primarily travel
difficulties. Be prepared for snow covered roads and limited
visibilities, and use caution while driving. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.
URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
435 AM EST Thu Jan 4 2018
St. Marys-Calvert...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM EST THIS
MORNING......WIND CHILL ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO NOON EST FRIDAY...
* WHAT...Snow through this morning. Very cold wind chills
expected late this evening through Friday morning. Plan on
difficult travel conditions, including during the morning
commute. Storm total snowfall of 3 to 6 inches expected.
Expect wind chills to range from 0 to 10 below zero late this
evening through Friday morning.
* WHERE...St. Marys and Calvert.
* WHEN...For the Winter Storm Warning, until 11 AM EST this
morning. For the Wind Chill Advisory, from 10 PM this evening
to noon EST Friday.
* ADDITIONAL DETAILS...Be prepared for significant reductions in
visibility through this morning from snow and blowing snow. The
cold wind chills will cause frostbite in as little as 30 minutes
to exposed skin. Northwest winds will average between 20 and 35
mph with gusts around 50 through this morning. Northwest winds
will gust around 40 to 45 mph this afternoon and evening before
decreasing to 15 to 25 mph later tonight. Gusty northwest winds
may cause downed trees and tree limbs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Winter Storm Warning for snow and blowing snow means severe
winter weather conditions are occurring. If you must travel, keep
an extra flashlight, food and water in your vehicle in case of an
emergency. The latest road conditions for the state you are
calling from can be obtained by calling 5 1 1.
A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.
Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
519 AM EST Wed Jan 3 2018
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George
This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and adjacent counties in
central Maryland and northern Virginia as well as the District of
Columbia.
DAY ONE...Today and Tonight
A Winter Weather Advisory is in effect for St Marys and Calvert
Counties...beginning at 10 pm late this evening. Accumulating snow
is expected late tonight across these areas. Elsewhere...a period
of light accumulating snow is likely after midnight across the
Washington and Baltimore Metropolitan areas. Any snow that does
fall will stick on paved surfaces, causing the potential for
hazardous conditions during the Thursday morning commute.
A Gale Warning is in effect for portions of the waters beginning
at 1 AM early Thursday Morning.
DAYS TWO THROUGH SEVEN...Thursday through Tuesday
A Winter Weather Advisory continues until 11 am for St Marys and
Calvert Counties for accumulating snow. Elsewhere...light snow
accumulation is likely for the Washington and Baltimore
Metropolitan areas Thursday morning and this may cause hazardous
conditions for the Thursday morning commute.
Sub-zero wind chills which could cause hypothermia and frostbite
are possible Thursday night through Saturday morning. Wind Chill
Advisories may be required.
A Gale Warningis in effect for the waters Thursday, and may need
to be extended through Friday.
There is a slight winter storm threat Sunday night into Monday.
If the threat materializes, it could cause travel disruptions.
UPDATED Snow Totals in top image 9:00 p.m.