Baltimore/Washington

Weather Forecast Office

WINTER TEMPLATE (FOR TESTING ONLY)

Winter forecast will resume next season.

Minimum	MOST LIKELY SNOWFALL	Maximum
Snow Accumulation Potential Experimental - Leave feedback
Expect at least this much:	Point / Range	Potential for this much:

What's this?	What's this?	What's this?
Minimum Potential Accumulation Expect at least this much. This is what we see as the least amount of snow the storm can produce. 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. Close Most Likely Snow Accumulation Represents our official snow forecast in inches within the next one to three days. The snowfall amounts are provided in point (single number) and ranges (1-2", 2-4", etc.). You can toggle between the two by hovering over the "Point" and "Range" text above the image. The point amount is our forecast but the range for the "most likely" represents the forecast uncertainty in predefined ranges. Close Maximum Potential Accumulation What you should be prepared for. This is what we see as the storm's maximum potential snowfall accumulation. 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. Close

Storm Track		Reported Snow/Ice Totals
Other Snow/Ice Information

What's this?		What's this?
Low Tracks Graphic The graphic depicts the forecast location of significant surface lows impacting the 48 contiguous United States in 12 hour increments out to 72 hours into the future. The low position and track forecast by NCEP WPC meteorologist is in white. Each low position is accompanied by a lead time (Eastern Time). The circles around each low represents a 75% probability the observed low will be located with the circle. Note: The probability is derived using previous season's verification data. For reference, existing surface lows are depicted with a red marker without yellow circles. Close Precipitation Onset Most likely time of winter precipitation onset (snow, sleet, freezing rain). Rain is not included here. This information is provided when we issue a Warning or Advisory for expected snow or ice accumulation; 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. Close 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. Close

Active Watches/Warnings/Statements

Percent Chance That Snow Accumulation Will Be Greater Than...
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Exceedance Probabilities

Represents the likelihood of exceeding a specific snowfall amount. Thresholds are 0.1", 1", 2", 4", 6", 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".

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Hover over thumbnails below to view larger image.

>=0.1"	>=1"	>=2"	>=4"	>=6"	>=8"	>=12"	>=18"

Chance of Snow Accumulation
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What's this?

Snow Accumulation

Ranges

Represents the likelihood of various snowfall ranges. Amounts ranges are 0", 1-2", 2-4", 4-6", 6-8", 8-12", 12-18" and 18" +. This product is designed to indicate high or low confidence in the official snowfall forecast.

Exceedance

Represents the likelihood of exceeding a specific snowfall amount. Thresholds are 0.1", 1", 2", 4", 6", 8", 12", and 18". This product is designed to indicate high or low confidence in the official snowfall forecast.

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Long-Range Forecast

Days 4-5 Forecast Precipitation	Days 6-7 Forecast Precipitation


Days 6-10
Temperature	Precipitation


Days 8-14
TEMPERATURE	PRECIPITATION


Week 3-4
TEMPERATURE	PRECIPITATION

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

RADAR Products

Baltimore-Washington

Northeast Radar

Full U.S. Radar

Adjacent Radars:


	LWX

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