The nor'easter, warned vs. measured — 22–28 September 2026

Peak water at 51 NOAA tide gauges by NWS flood category, NWS coastal flood warnings and advisories; zoom in to see modeled flood depth at the measured peaks

Legend

Gauge: major flooding

Gauge: moderate flooding

Gauge: minor flooding

Gauge: below flood stage

Gauge: no NWS flood thresholds

Outline: NWS Coastal Flood Warning zone

Outline: NWS Coastal Flood Advisory zone

Blue shading: MODELED depth (NOAA), at the half-foot level at or below each stretch's lowest flooded peak

Green: low-lying, not connected to the water (NOAA)

Data: NOAA CO-OPS tide gauges and NWS flood thresholds; NWS coastal flood products via Iowa Environmental Mesonet; NOAA OCM inundation data.