NWS Sterling, VA - Winter Weather page
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Winter Weather Page

Winter weather updates will resume in 2014-2015 Winter season.


Expected Snow/Ice Accumulations
Onset of Wintry Precipitation
Reported Snow/Ice Totals
NWS does not expect measurable snow within the next 36 hours.
Onset graphic is provided when there is an active warning or advisory.
Snow Totals Map is generated as snow reports are received by NWS.
What's this?
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Forecast

Represents our official snow and ice forecast, in inches, within the next one to two days.
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Precipitation Onset

Most likely time of winter precipitation onset (snow, sleet, freezing rain). Rain is not included here. Time is from a 24 hour clock (e.g. 15 = 15:00 = 3:00 P.M.; 23 = 23:00 = 11:00 P.M.). Uncertainty is not included here so allow for a slightly early or late arrival.

This information is provided when we issue a Warning or Advisory for expected snow or ice – typically six to 24 hours in advance. Times are only given for places that are under a Warning or Advisory. They will be blank in areas outside Warnings or Advisories.

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Reported

As snow and/or ice reports come into the NWS (you can email reports to LWX-report@noaa.gov or Tweet to @NWS_BaltWash), we will pass them on here. With the map linked here, and the supporting reports below it, you can keep tabs on how much has fallen.


Active Watches/Warnings/Statements
Click on the map below for the latest forecast.
Last map update: Sat, Oct. 25, 2014 at 11:48:21 pm EDT
Read watches, warnings & advisories
National Weather Service Pittsburgh, PA National Weather Service State College, PA
National Weather Service Charleston, WV
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National Weather Service Philadelphia, PA
National Weather Service Blacksburg, VA National Weather Service Wakefield, VA
Small Craft Advisory
Special Weather Statement
Hazardous Weather Outlook
Short Term Forecast


The next three sections are for snow only, and do not include any information on ice/freezing rain.
Snow Accumulation Potential
Experimental - Leave feedback
Probabilities forecast not in effect.
Minimum MOST LIKELY Maximum
Expect at least this much: Potential for this much:
Probabilistic range of possibilities for storms are generated for planning ahead of the storm. These images are not currently available while snow is ongoing in our forecast area. NWS does not expect measurable snow within the next 36 hours -OR - the entire duration of the storm covered by max/min is not forecast yet. Probabilistic range of possibilities for storms are generated for planning ahead of the storm. These images are not currently available while snow is ongoing in our forecast area.
What's this?
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Minimum Potential Accumulation

Expect at least this much. This is what we see as the least amount of snow the storm can produce.

The range between maximum and minimum typically shrinks as the storm nears, and the outcome becomes more certain. “Most Likely” (the forecast) will remain between the two.

This information is for advance planning ahead of the storm. It is provided out as far as three days. However, when the snow starts to fall, this will be discontinued to focus on the forecast snow amount.

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Most Likely Accumulation

Represents our official snow forecast in inches within the next one to two days. The snowfall amounts are provided in ranges (1-2”, 2-4”, etc.).

What's this?
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Maximum Potential Accumulation

What you should be prepared for. This is what we see as the storm’s maximum potential snowfall accumulation.

The range between maximum and minimum typically shrinks as the storm nears, and the outcome becomes more certain. “Most Likely” (the forecast) will remain between the two.

This information is for advance planning ahead of the storm. It is provided out as far as three days. However, when the snow starts to fall, this will be discontinued to focus on the forecast snow amount.

shapefiles kml


Chance That Snow Accumulation Will Be Greater Than...
Experimental - Leave feedback
Probabilities forecast not in effect.
What's this?
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Exceedence Probabilities

Represents the likelihood of exceeding a specific snowfall amount. Thresholds are 0.1”, 1”, 2”, 4”, 8”, 12”, and 18”. This product is designed to indicate high or low confidence in the official snowfall forecast.

Example: An 80% chance of exceeding 2” means that we have a high confidence that it will snow at least 2”. Conversely, a 10% chance of exceeding 18” means that we have high confidence that it will snow less than 18”.

Probabilistic range of possibilities for storms are generated for planning ahead of the storm. These images are not currently available while snow is ongoing in our forecast area.


Chance of Snow Accumulation
Experimental - Leave feedback
Probabilities forecast not in effect.
What's this?
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Snow Accumulation

Ranges

Represents the likelihood of various snowfall ranges. Amounts ranges are 0”, 1-2”, 2-4”, 4-8”, 8-12”, 12-18” and 18”+. This product is designed to indicate high or low confidence in the official snowfall forecast.

Exceedence

Represents the likelihood of exceeding a specific snowfall amount. Thresholds are 0.1”, 1”, 2”, 4”, 8”, 12”, and 18”. This product is designed to indicate high or low confidence in the official snowfall forecast.

Probabilistic range of possibilities for storms are generated for planning ahead of the storm. These ranges are not currently available while snow is ongoing in our forecast area.

Long-Range Precipitation Forecast
Days 4-5 Forecast Precipitation Days 6-7 Forecast Precipitation
Days 4-5 Precip Days 6-7 Precip


Baltimore-Washington Products
HAZARDOUS WEATHER OUTLOOK
FORECAST DISCUSSION
SHORT TERM FORECAST
SPECIAL WEATHER STATEMENT
PUBLIC INFORMATION STATEMENT


RADAR Products
Adjacent Radars:
Go to the adjacent radar site to the northwest, Pittsburgh, PA Radar Go to the adjacent radar site to the north, State College, PA Radar Go to the adjacent radar site to the northeast, Mt. Holly, NJ Radar
Go to the adjacent radar site to the west, Blacksburg, VA Radar LWX Go to the adjacent radar site to the east, Dover Air Force Base, DE Radar
Go to the adjacent radar site to the southwest, Raleigh/Durham, NC Radar Go to the adjacent radar site to the south, Wakefield, VA Radar blank


Recent Events
March 17, 2014
March 3, 2014
February 13, 2014
February 3, 2013
January 21, 2014
January 18, 2014
January 2, 2014
December 15, 2013
December 8, 2013
Other Archived Events
Past Snow Amounts


Useful Winter Weather Information
Historic Mid-Atlantic
Winter Storms
Winter/Snowfall
Statistics
El Niño and
DC/Baltimore Winters
Watches, Warnings,
& Advisories
How to
Measure Snow
La Niña and
DC/Baltimore Winters
** BE PREPARED! **
At Home
On the Road
Outside in the Cold

National Weather Service
Weather Forecast Office Baltimore/Washington
43858 Weather Service Rd.
Sterling, VA 20166
Phone: (703) 996-2200
Webmaster: lwxwebmaster@noaa.gov
Page last modified: October 29, 2013 8:00 PM
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