DISCUSSION: As the latest Springtime low pressure system begins to gradually pull away from sections of the central United States, there are many lasting memories implanted to the minds of millions of people across this part of the nation. Over the past four to five days, there is no debate that there was an assault of persistently heavy rainfall which impacted many populated across states such as (but not limited to) Missouri, Oklahoma, and Arkansas. As a result of this tremendous (and in some cases near-historic) rainfall in many places, there were numerous road closures as many roads went underwater due to excessively large amounts of rainfall piling up in many lower-lying areas across these and other states across the central United States.
As shown in the graphic attached above (courtesy of WeatherBELL Analytics LLC before being re-shared by Meteorologist Wes Peery), as of earlier in the evening on Sunday (04/30/2017), there were radar estimated total precipitation volume estimates on the order of 6.8 trillion + and 4.2 trillion gallons plus spread across the states of Missouri and Arkansas respectively. Hence, there were unprecedented amounts of rainfall which fell during the course of the last 96 to 120 hours across these areas which left many highways as well as many cities and towns being isolated as "islands within a larger state" as a result of ponding of major rainfall totals.
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©2017 Meteorologist Jordan Rabinowitz