Jun 26, 2010
A very unstable airmass was in place over western Iowa and areas to the west. CAPE rose to over 6500 J/kg by late afternoon with the lifted indices falling to -12 to -15 C. Downdraft CAPE as quite high at around 1600 J/kg, while available CAPE in the -10 to -30 C layer of the atmosphere was between 700 and 1000 J/kg. The atmosphere had a strong shear present with 40 to 60 kts The freezing level was quite high, just below 15,000 feet. Precipitable water increased to around 1.5 inches. Stro
Source: NOAA National Weather Service Storm Events Database (event 227324). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Humboldt County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.