Aug 30, 2021
The most notable feature in regional analysis was Tropical Storm Ida that was centered over west central Mississippi around 20z on August 30th. Locally, what was a cold front had become more of a diffuse stationary boundary extending from central Indiana through portions of Illinois and into central Missouri. Light northerly flow settled in behind the front with gradually decreasing moisture. Surface dew points dropped from the low-70s near the I-70 corridor to the mid and upper 60s along the MO
Source: NOAA National Weather Service Storm Events Database (event 980376). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in St. Louis (c) County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.