While the rain is forecast to taper off after 6 a.m. today, showers and thunderstorms overnight were expected to dump another 2-3 inches of rain on an already drenched Quad-Cities, making the forecasting of river crests virtually impossible until later today.
Meteorologist Linda Engebretson of the National Weather Service, Davenport, said the Quad-Cities set a record for rainfall for the day Wednesday.
“The old record for the day was 1.10 inches set on April 17, 1912,” Engebretson said. “As of 7 p.m., we were at 1.65 inches and counting.”
The official measurement was recorded at the Quad-City International Airport in Moline, although rainfall amounts varied widely across the region.
Engebretson said the Quad-Cities is under a very slow moving system that is combining moisture from the Gulf of Mexico with another system that is moving east over the Rocky Mountains.
The center of the system should move across the Quad-Cities today.
While there is a 90 percent chance of rain today, Engebretson said the amounts will be much lighter.
The mercury is expected to climb to about 68 degrees today, then cold air moves in.
Temperatures will plummet to a low of about 35 overnight tonight. The high Friday is expected to reach only into the middle 40s, while the overnight low will be about 28 degrees.
A mix of rain and snow is likely before 1 p.m. Friday, she said.
“The rain should shut off by Friday night,” Engebretson said. “Saturday is expected to be sunny with a high of 51 degrees.”
But a chance of rain returns to the forecast Saturday night and continues through Wednesday.
“I don’t think we’ll get much added to what we’ve already gotten by those systems, but what we do get could slow the rivers dropping,” Engebretson said.
With so much rain still yet to fall, Engebretson said that as of Wednesday night, too much was in flux to determine when the local rivers will crest. Additionally, all of Iowa and Illinois north of the Quad-Cities is getting hit by the storms.
The Mississippi River at Lock and Dam 15, Rock Island, was just above the 15-foot flood stage at 7 p.m. Wednesday, when it was recorded at 15.1 feet, Engebretson said. The forecast was for the river to rise to 18.9 feet by Saturday evening. “But, that’s not a crest number,” she added.
The Rock River at Joslin was at 13.5 feet at 7 p.m. Wednesday. Flood stage there is 12 feet. It is expected to rise to 17.6 feet Sunday. The Rock River at Moline had risen to 12.1 feet as of 7 p.m. Wednesday. Flood stage there is 12 feet. It was expected to rise to 15.3 feet Sunday. It is not yet known when the Rock will crest.
The Wapsipinicon at DeWitt stood at 11.6 feet at 7 p.m. Wednesday. Flood stage there is 11 feet. It is expected to rise to 13.2 feet by this evening.