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Experimental Winter Storm Outlook (WSO)
 
The Winter Storm Outlook is experimental and does not depict official warnings, and should always be used in context with official NWS forecasts and warnings. Because this product is experimental, it may not update in a timely fashion. Always check the creation and valid times. For more information, please refer to the following links:Product/Service Description Document

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Probability of Exceeding Warning Criteria (Snowfall)

More InfoIndividual day forecasts are the maximum probability of exceeding the Proposed Event-based Winter Storm Warning Criteria for Snow Accumulation during the Valid Time Range from the Probabilistic Winter Precipitation Forecast (PWPF) for a 24-hour period from 12Z to 12Z. The data in the "Days 1-4" link are simply the maximum probabilities from all four days. These forecasts may include edits by forecasters.

Probability of Exceeding Warning Criteria (Freezing Rain)

More InfoIndividual day forecasts are the maximum probability of exceeding NWS Winter Storm Warning Criteria from the Probabilistic Winter Precipitation Forecast (PWPF) for a 24-hour period from 12Z to 12Z. The data in the "Days 1-4" link are simply the maximum probabilities from all four days. These forecasts may include edits by forecasters.
Map Overlays
CWAs Counties
RFCs FEMA Regions
States NWS Forecast Zones
Urban Areas ARTCC/FIR
WPC PWPF Snow Forecast   |   Proposed Event-based Winter Storm Warning Criteria: Criteria
WPC PWPF Ice Forecast   |   NWS Winter Storm Warning Freezing Rain Criteria: 12 HR / 24 HR

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WSO for Snow WSO for Freezing Rain


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