Past IEM Features tagged: ffg
Areas along the south central border of Iowa and Missouri received a significant amount of rainfall over the weekend leading to some flooding. The featured map displays the one hour precipitation guidance threshold before additional non-urban flash flooding is expected. Values are very low in the area, but thankfully additional rainfall is expected to hold off for a few days there. Additional heavy rain will work west to east over the state this week with subsequent chances of flooding.
Today wraps up Severe Weather Awareness Week in Iowa and today's topic is flooding. Flooding is one of the top weather related cause of fatalities in the United States. Flooding can happen quickly as a result of heavy rainfall and the featured map is a diagnostic on how much rainfall is needed over an hour to result in non-urban area flash flooding. This product is generated by the National Weather Service River Forecast Center and you can generate maps like these on the website for current and archived dates.
Tags: swaw ffg
The River Forecast Centers of the NWS issue Flash Flood Guidance for estimated rainfall totals over a given amount of time needed to begin flash flooding. These totals are not appropriate for steeped nor urban areas. The featured map presents the county/forecast zone estimates from last evening. Most of Iowa is in the 1.5 to 2 inch range. Our recent wet weather and upcoming storms have some concern for more flash flooding to occur.