I for one am Thankful it is Friday! I need a weekend pronto!
Of course we are still very concerned about flooding over the Midwest. it seems every day a new levee fails or gets over-topped by water. I was reading one of my favorite Weather Bloggers Dr. Jeff Masters over at www.wunderground.com, and he brought up some interesting points about why we are seeing such massive and historic floods this year. Here’s part of what he writes (and you can check out the full article here:
“The U.S. Geological Survey has preliminary data showing that this month’s floods on four of Iowa’s rivers–the Cedar, Iowa, Shell Rock, and Wapsipinicon–were 500-year floods. Back in 1993, many rivers in the Midwest also experienced 500-year floods, so the region has endured two 500-year floods in the past 15 years. How can this be? First of all a definition–a 500-year flood is an event that has only a 0.2% chance of occurring in a given year, based on available river flow data. Of course, reliable data only goes back a century at most, so designation of a 500-year flood event is somewhat subjective. Still, it seems rather improbable that two such huge floods should occur within such a short time span, raising the question of whether the floods were, in part, human-caused.
In a provocative story in the Washington Post today, it was pointed out that part of the flooding is due to the draining of wetlands for farming purposes. As nature’s natural buffers against flooding are drained and filled to provide room for more farmland, run-off and flooding are bound to increase. Furthermore, as more levees are built to protect more valuable farmland and new developments, flood waters are pushed out of the former areas they were allowed to spread out in and forced into river channels behind the new levees. Even higher levees must then be constructed to hold back the increased volume of water they are asked to contain. “
This is a story that is going to be with us for sometime to come. As for rain in the forecast, there’s a risk for thunderstorm across parts of the Midwest today and tomorrow, but certainly nothing that will bring the kind of floods we’ve seen over the last week.
Our other big story is the heat across the West. As a ridge of High Pressure continues to dominate the area, we have excessive heat warnings for much of southern California into Southwest Arizona where temperatures will top the century mark and shatter records this weekend.
Thank you for your responses to what I wrote last night with regards to changes on the blog, and more specifically to the U-Report features. I do want to give a shout out to our intern Krista who is helping upload the weather photos on a daily basis. I am Thankful to her for taking some of the workload off my plate for the next little while.
Have a great Friday!!
jd