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Flash Flood — Pocahontas, IA

May 13, 2023

Convection percolated along a warm front across the area through the morning. By afternoon, storms re-strengthened as as daytime heating helped enhance instability. Despite good instability with MLCAPE over nearing 2000 J/kg, lapse rates were modest and speed shear was weak. Despite this, directional shear was good and when combined with instability for brief stretching, allowed for a number of weak and short-lived tornadoes to develop. While 13 tornadoes occurred, they were confined to two smal

Source: NOAA National Weather Service Storm Events Database (event 1092806). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Pocahontas, IA

This event is one of many recorded floods in Pocahontas County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

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