Winter Storm Severity Index Web Display
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The Winter Storm Severity Index
WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.
Overall Winter Storm Impacts:
Maximum impact from any of the components.
Snow Amount:
Potential impact from snow amount and snow rate.
Snow Load:
Potential impact from the weight of snow on structures.
Ice Accumulation:
Potential impact from the ice accumulation and
wind.
Blowing Snow:
Potential impact from falling snow combined with
wind.
Select Zoom Area:
Change image opacity:
For a users guide and more information about the WSSI, please select from the dropdown menu below.
Product/Service Description Document
WSSI Users Guide
Interactive ESRI Story Map
Video Guide
Download Latest WSSI in GIS Format:
Download Data in KMZ
Download Data in SHP
REST Service Links
WSSI Static Image Archive:
WSSI Static Image Archive Data
WSSI Product Suite:
Rolling 24 HR WSSI
Probabilistic WSSI (WSSI-P)
Map Overlays
NWS County Warning Areas
River Forecast Center Boundaries
FEMA Boundaries
Counties Boundaries
State Boundaries
NWS Public Forecast Zones
Urban Areas
ARTCC/FIR
Retrieve Static Images
Select Zoom Area
Select WSSI Element
WSSI Overall
Blowing Snow
Ice Accumulation
Snow Amount
Snow Load
To retrieve static images please select a zoom area and WSSI element.
Day 1
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Day 3
Days 1 - 3
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