Past IEM Features tagged: flood2008
Major impact flooding continues along the major rivers in our area. Unlike the small Squaw Creek in Ames, these rivers have a long response time. Unfortunately, thunderstorms are expected to fire this afternoon and again this weekend.
The featured graph is of recent river flow observations from the Squaw Creek in Ames showing in cubic feet per second (cfs). The creek and basin are on the small side, so flooding tends to happen quickly and not last long. The recent stretch of dry weather has been helpful to allow the creek to receed to levels well within bankful.
The featured map is of stage4 precipitation estimates for the past three weeks. Northeastern Iowa has been hit particularly hard with a large area depicted over a foot of rain! The forecast for this week continues to be encouraging with dry weather expected.
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NWS flood severity forecasts
The featured map is a summary of current forecasted flooding impacts. A good portion of this map is or will be experiencing major flooding with river levels at or above 1993. The immediate impacts are to property along the rivers and closed roads due to washouts or water over the road. Another major impact is currently playing out in Iowa's water logged fields with the corn and soy crops not fully planted and well behind on growth. The crops need to see the bright sunshine and so do many of us.
The featured map is modelled soil moisture in a layer just below the ground surface. Most of the state is analyzed in the 40-50% range, which is saturated. This layer effectively prevents most of the rain water from seeping into the ground leading to efficient runoff or standing water. This situation will only get worse this week with numerous chances of heavy rainfall in the forecast including an ongoing event this morning.