0 - 0.39 in
0.39 - 2.0 in
2.0 - 3.9 in
3.9 - 9.8 in
9.8 - 20 in
20 - 39 in
39 - 59 in
59 - 98 in
98 - 197 in
197 - 295 in
295 - 394 in
394 - 787 in
Winter Storm Severity Index
WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”
- Winter Weather Area highest in this area
- Minor Impacts
- Moderate Impacts
- Major Impacts
- Extreme Impacts
Highest in this area, by day and by cause
- Day 1
- nothing drawn
- Day 2
- Winter Weather Area
- Day 3
- Winter Weather Area
- Snow amount, Days 1–3
- Winter Weather Area
- Snow load, Days 1–3
- nothing drawn
- Ice, Days 1–3
- nothing drawn
- Blowing snow, Days 1–3
- nothing drawn
Each day and cause on the Winter tab, with its own issue time
WPC’s WSSI, overall impact, Days 1–3, valid to , issued . WPC issues each day and cause on its own clock. Not a warning, and not a chance. Data: NOAA/NWS/WPC.