East Coast Slammed by Powerful Nor’easter as Bomb Cyclone Intensifies
A rapidly intensifying nor’easter has battered the East Coast of the United States, with heavy snow, fierce winds, and reported coastal flooding. The winter storm, now named Gianna, strengthened into a bomb cyclone after its central pressure dropped drastically in 24 hours, fueling severe conditions from the Carolinas to New England. Parts of North Carolina recorded over a foot of snow, with significant totals along the I‑85 corridor between Charlotte and Greensboro. Eastern Carolinas, including Myrtle Beach and Wilmington, also saw 6–12 inches of snow, the highest in 2 years, creating hazardous travel and widespread power outages.
Along the coast, wind gusts reached 70 mph in eastern North Carolina and southeast Virginia, while New England faced gusts above 40 mph. The high tide cycle worsened flooding, producing moderate to major inundation from the Virginia Tidewater to the Outer Banks. Conditions are expected to gradually improve as the system moves offshore.
The NWS highlighted the potential for powerful onshore winds and near-blizzard, flood conditions along coastal Virginia and North Carolina, with reduced visibility expected.
Actionable Analytics on EigenPrism
Forecast
Winter Storm Dataset
All EigenPrism® users can assess the forecasts associated with this event using the following report templates:
This report template enables you to assess the forecast of the winter storm based on footprints from NWS. The report consists of 72-hr Forecast Freezing Rain Accumulation, 72-hr Forecast Snow Accumulation, Potential Winter Storm Overall Impact, and 6-Day outlook of the pipe-freeze risk for CONUS by Adiabat. The pages auto-update with the latest available data.
This report template enables you to assess the summary level forecast (Potential Overall Winter Storm Impact) and four component WSSI (Winter Storm Severity Index) footprints from NWS. The four component WSSI footprints consist of Potential Snow Amount Impact, Snow Load Impact, Ice Accumulation Impact, Blowing Snow Impact. The report template pages auto-update with the latest available data.
Flood Dataset
All EigenPrism® users can assess the forecast of this severe weather event using the following report template:
The report template auto-updates with the latest available footprints, which include: WPC 3-Day Excessive Rainfall Outlook from NWS, US Flood Outlook from NWS, North America 3-day and 5-day Flood Potential from Adiabat.
Alerts
Users who have alerts set on their exposures for the relevant event sets (severe weather and winter storm) like those from NWS and Adiabat will receive alerts (if the event footprints impact these exposures).
To learn more about how to set an alert on a specific event set, check out this help center article.
Feel free to contact us at Prism.Support@eigenrisk.com or reach out directly to your Customer Success Manager with any questions or concerns. Our team is here to assist you with setting alerts, understanding report templates, and maximizing the actionable insights available through EigenPrism®.
Not an EigenPrism User? Here’s a Quick Way to Check ZIP-Level Impact
For underwriters, brokers, and portfolio managers who need fast visibility into impacted ZIP codes, we’ve built a tool called ZIP Response on our website. It’s a free, no-login tool that highlights the top ZIP codes that are most impacted during active events, such as hurricanes, floods, wildfires, and severe storms.
You can request the complete ZIP list by simply filling out a short form and get it delivered straight to your inbox.
If you’d like to explore the impacted ZIP codes for this event, visit ZIP Response.
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