In years past by September, Iowa no longer expects rain. However that is obviously not the case with heavy rainfall the past 10 days and more expected in the forecast. Professor Gabriele Villarini, a faculty affiliate of the Iowa Flood Center at the University of Iowa, paired with Assistant Research Scientist Wei Zhang to develop the images above for context around the rain we are currently experiencing.
The top left panel shows that from 1981 to 2010 Iowa could expect at most 2 inches of rain in August and September. The bottom left panel shows that we are currently expecting 8-10 inches.
The top right panel shows that in this time period, Iowa is experiencing the most rainfall since 1948. The bottom right panel shows that in some areas there is more than 80% rain now than the second largest rainfall.
This weeks segment talks about why Iowa and other mid-latitude states are experiencing hotter summers.
Summers in mid-latitudes, including Iowa, are warming faster than other seasons, a recent study found.
This is the Iowa Environmental Focus.
Between forty and sixty degrees latitude in the Northern Hemisphere, an area from the southern Iowa border to mid Canada warmed more rapidly in the summer than in the winter over a thirty-eight-year-period,
The study published in the journal Scienceattributed this finding to the fact that a substantial amount of Earth’s land mass is concentrated in this zone, and land tends to heat up more quickly than the ocean. This can have serious implications on agriculture, because much of this land is used to grow crops in the summer, particularly in Iowa.
This study was conducted using a fingerprint method, meaning the researchers could distinguish natural climatic warming from increased temperatures due to human activity.
North and South Carolina have both issued evacuation warnings in anticipation of a very destructive weekend. The eye of Hurricane Florence is made landfall this afternoon, though her rain bands touched land late Thursday.
As of Thursday morning, Florence’s strongest sustained winds of 105 mph put her in Category 2 classification for wind. As of Friday afternoon, she has downgraded to Category 1. Forecasters say her storm surge, the swell of water pushed onshore by hurricane winds, will be a Category 4. The National Hurricane Center predicts floods over 9 feet above ground in some areas.
States as far inland as Indiana may receive the tail end of the hurricane, which will most likely have weakened to a less windy but still wet tropical storm or depression by then.
Experts debate whether climate change will increase the frequency and severity of tropical storms and hurricanes in coming years, and whether it already has. It is difficult to separate natural variability from human-induced effects when examining any specific storm, but many of the conditions needed to spawn hurricanes are certainly undergoing change.
To many experts, it seems to many that rising sea levels exacerbate storm surge, that rising sea surface temperatures could add more fuel to storms, and that a warmer, wetter atmosphere increases rainfall. Just look to 2017’s especially devastating season for evidence that these storms are getting nastier.
Other experts say that climate change will increase wind shear, friction between upper and lower level winds moving in different directions, which could actually stop more hurricanes from forming. Only time will tell which factors
As climate change is variable over the Earth’s surface, models show both increase and decrease of all those different factors in different locations. While climate change will almost certainly impact hurricanes, only time will tell the nature of that impact.
On July 19th of this year, Marshalltown, IA was hit with a devastating tornado. 89 homes were destroyed and 525 sustained major damage. The tornado struck a low income part of town making it very difficult for the small town to bounce back. Many people in the area had little to no insurance.
Lennox and JBS Swift & Co., the two largest employers have made sizable donations to help rebuild property. With disaster relief help, several employers have been able to continue to provide health insurance to their employees despite no longer having jobs for them. However, the process is slow and there are many people in the town still living in destroyed homes despite the tornado occurring months ago. Marshall County Family Long Term Recovery Committee is currently going door to door to evaluate which homes can still be lived in long term. Greg Smith, chairman of the Iowa Disaster Human Resource Council, stated, “It is not unusual for the poorest of the community to become poorer after a disaster.”
There is also large concern from business owners they may not have the insurance money to rebuild their company. It is a city requirement to use the original materials instead of replacing it with something cheaper, like wood. The collapse of these business will leave many people unemployed.
Even after the physical damage is cleared away Marshalltown will likely face a difficult couple years. Jim Zaleski, the city’s economic development director and tourism marketer, has helped with tornado relief in other towns. He believes,” the tornado was a catalyst, ” and will “force the community to take some hard looks at what was going to happen over the next decade.”
Citizens of Iowa know that with heavy rainfall comes flooding. The last few weeks of rain have served as a very real reminder around the state.
The Iowa Flood Center is a great source of information on current, forecasted and potential floods. Their Iowa Flood Information System in particular offers tools for researchers, city planners, and even for concerned or curious private citizens.
At first glance, the IFIS may seem overwhelming. Fortunately for the everyday user, the IFIS homepage includes a tutorial video and links to some of the most universally useful features of the system. These basic tools can be layered with additional information like rainfall, national parks and zip code boundaries, if users so choose.
The Inundation Maps feature shows current conditions at IFS water sensors . Zoom in on a selected area of the state and click on a blue “USGS” box along the water to view the water level at that sensor. Click “More Info” to view the level over time. You can play with the slider in the panel to the right to see how higher or lower water levels would affect your community.
The Flood Alertsfeature shows flood alerts at different stages, from “action” to “major” across the state. Clicking on the triangular alert symbols pulls up the same information about water level that the Inundation Maps feature does.
The River Communitiesfeature dots the state with purple squares representing communities near rivers. Clicking on each will pull up information about future flood outlook and put a border around the upstream watershed so users can see what may be headed their way.
Use these tools during current and future flood hazards to stay informed, keep safe, or simply marvel at the power of nature and technology.
Mayor Brad Hart held a press conference yesterday stating that preparations were in place. City workers are preparing for 18 feet to be safe. Hart stated, “I’m confident that no matter how high the river gets this week, that we’ll rise above it and protect the community as best we possibly can.”
Right now there is expected to be no damage. City Public Works Director Jen Winter’s biggest concern is “water coming back into our storm sewer system and backing up.” “Unless something fails, we anticipate that no, that there would not be damage,” she said. “In some cases, depending on the age of a building, some people do get water in their basements despite the fact that we have kind of plugged off the river from backing up.”
Within Iowa, the heaviest damage occurred in the Iowa City and Quad Cities areas. Flash floods soaked homes, businesses and even the University of Iowa’s Kinnick Stadium, which was drained almost immediately.
As of the morning of Thursday, Aug. 30, the National Weather Service forecasts a chance of more storms every day until Monday. Climate change projections warn Iowans to expect more wet weeks and severe rain events in coming years.
Three tornado warnings sounded across eastern Iowa Tuesday night as well: southwest of Williamsburg, Iowa County; in Iowa City; and and in De Witt, Clinton County. The National Weather Service reported wind of 83 miles per hour at the Iowa City Municipal Airport.
Strong storms are hammering the Midwest AGAIN today. This is of a tornado warned storm as it approached Iowa City just hours ago. pic.twitter.com/9dTnjDYfpx
Tuesday’s storm came less than a week after the Federal Emergency Management Agency denied Gov. Kim Reynold’s request for funding to help private individuals and businesses recover from severe storms earlier this summer, as reported by the Des Moines Register. FEMA did grant Iowa funding to repair public infrastructure.