CAE Winter Weather Forecasts

Probabilistic Snowfall Forecasts
Ice Accumulation Forecasts
Other Snow/Ice Information
Long-Range Forecast
Local Winter Weather Info

Snow Amount Potential Experimental - Leave feedback
Expected Snowfall - Official NWS Forecast Point Range What's this?	High End Amount 1 in 10 Chance (10%) of Higher Snowfall What's this?
	Low End Amount 9 in 10 Chance (90%) of Higher Snowfall What's this?
Low End Amount - 9 in 10 Chance (90%) of Higher Snowfall This map depicts a reasonable lower-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This lower amount is an unlikely scenario with a 9 in 10, or 90% chance that more snow will fall, and only a 1 in 10, or 10% chance that less snow will fall. This number can help serve as a lower-end scenario for planning purposes. Expected Snowfall - Official NWS Forecast This map is the official NWS snowfall forecast in inches during the time period shown on the graphic. This snowfall amount is determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations. High End Amount - Only a 1 in 10 Chance (10%) of Higher Snowfall This map depicts a reasonable upper-end snowfall amount for the time period shown on the graphic, based on many computer model simulations of possible snowfall totals. This higher amount is an unlikely scenario, with only a 1 in 10, or 10% chance that more snow will fall, and a 9 in 10, or 90% chance that less snow will fall. This number can help serve as an upper-end scenario for planning purposes.

The purpose of these experimental probabilistic snowfall products is to provide customers and partners a range of snowfall possibilities, in complement to existing NWS deterministic snowfall graphics, to better communicate forecast uncertainties during winter weather events. For more information visit this project's Product/Service Description Document, and please provide us your feedback here.

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Percent Chance That Snow Amounts Will Be Greater Than...

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Percent Chance That Snow Amounts Will Be Greater Than

This series of maps shows the probability (that is, the likelihood) that snowfall will equal or exceed specific amounts during the time period shown on the graphic. These forecasts are based on many computer model simulations of possible snowfall totals.

Hover over thumbnails below to view larger image.

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

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Snowfall Totals by Location

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Snowfall Totals by Location

These tables show the snowfall forecast for individual locations. The tables provide the same information as the maps on this web page, just shown in a different way. The "Exceedance" option shows the chance that snow will exceed a certain threshold. The "Range" option shows the likelihood of snowfall being within a certain range. All of these values are valid for the same time period as depicted on the graphics.

Switch to: Range Exceedance

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Expected Ice Accumulation - Official NWS Forecast
Ice Accumulation Potential
What's this?
Most Likely Ice Accumulation Represents our official ice forecast in inches within the next one to three days. The ice accumulation amounts are provided in ranges.

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. 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. Reported As snow and/or ice reports come into the NWS (you can email reports to cae.webmaster@noaa.gov or Tweet to %twitterHandle%), 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.

Columbia Products
HAZARDOUS WEATHER OUTLOOK	FORECAST DISCUSSION	SPECIAL WEATHER STATEMENT	PUBLIC INFORMATION STATEMENT

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

Local Winter Weather Info

Click here to View the Latest Weather Briefing (pdf)

	Storm Total Snow - High End Amount Forecast graphic for 1 in 10 (10%) chance of Higher Snowfall.		Storm Total Snow - Low End Amount Forecast graphic for 9 in 10 (90%) chance of Higher Snowfall.
	Storm Total Snowfall - SC Midlands and CSRA Forecast graphic for Storm Total Snowfall SC Midlands and the CSRA.		Storm Total Snowfall - SC Forecast graphic for Storm Total Snowfall South Carolina.
	Storm Total Ice - SC Midlands and CSRA Forecast graphic for Storm Total Ice SC Midlands and the CSRA.		Storm Total Ice Graphic - SC Forecast graphic for Storm Total Ice for SC.
	Observed Total Snowfall Graphic - SC Midlands and CSRA Graphic for Observed Total Snowfall.		Observed Total Snowfall Graphic - SC Graphic for Observed Total Snowfall.
	Observed Total Ice Graphic - SC Midlands and CSRA Graphic for Observed Total Ice Accumulation.		Observed Total Ice Graphic - SC Graphic for Observed Total Ice Accumulation.
	Text Products Winter Weather Message Local Storm Reports Public Information Statement Current Observations Check date/time to ensure the product is current.
	Snow/Ice Probability Graphics Probability of snow reaching or exceeding 4, 8 and 12 inches and the probability of freezing rain reaching or exceeding 0.25 inches (from the NWS Weather Prediction Center) Day 1 \| Day 2 \| Day 3		National Impact Graphics Experimental products depicting model-derived winter weather impacts
	Report Snow/Ice Amounts and Damage To Us caewx@noaa.gov Facebook Twitter: @NWSColumbia