Winter Storm Severity Index

Winter Storm Severity Index

Winter Storm Severity Index Components

Snow Amount

WSSI Snow Amount

Blowing Snow

WSSI Blowing Snow

Ground Blizzard

WSSI Ground Blizzard

Ice Accumulation

WSSI Ice Accumulation

Flash Freeze

WSSI Flash Freeze
WSSI Description

The purpose of the Winter Storm Severity Index (WSSI) is to provide NWS partners and the general public with an indication of the level of winter precipitation (snow and ice) severity and its potential related societal impacts. The WSSI does not depict official warnings, and should always be used in context with official NWS forecasts and warnings. Because this is an experimental product, it may not update in a timely fashion.

Source:NOAA Weather Prediction Center.