The National Weather Service issued a Flood Watch on August 14 at 2:09 PM CDT, effective until August 15 at 10:00 AM CDT, for portions of Illinois, southeast Iowa, and northeast Missouri. The watch warns that excessive rainfall from rounds of thunderstorms could cause flash flooding, with the hardest hit areas north of Highway 34 potentially receiving 5 to 8 inches of rain. The alert remains in effect through Saturday morning.
KEY FACTS
- The Flood Watch covers specific counties in Illinois, Iowa, and Missouri, including Hancock, Henderson, Des Moines, and Clark.
- Peak hourly rainfall rates of 1 to 2 inches are possible from the strongest storms.
- Rainfall totals will vary considerably, but areas north of Highway 34 could see 5 to 8 inches, with isolated higher amounts.
- Excessive runoff may lead to flooding of rivers, creeks, streams, and low lying areas, as well as poor drainage and urban flooding.
- The watch is in effect through Saturday morning, with an increased probability of river and creek flooding.
CONTEXT
The National Weather Service issued the Flood Watch for a broad region spanning three states. The affected areas include Hancock, Henderson, McDonough, Mercer, and Warren counties in Illinois; Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa, Van Buren, and Washington counties in Iowa; and Clark and Scotland counties in Missouri. The watch is based on forecasts of repeated rounds of rain and embedded thunderstorms through Saturday morning. The NWS notes that rainfall totals will vary considerably across the watch area, with the most significant amounts expected north of Highway 34. The alert emphasizes that flash flooding is a risk, and there is an increased probability of river and creek flooding. Residents in flood prone locations should monitor conditions and be prepared to act if flooding develops. The NWS advises that some flooding may be significant, particularly in areas with poor drainage or urban settings.
WHY IT MATTERS
This Flood Watch signals a heightened risk of flash flooding that could threaten life and property in a multi state region. The potential for 5 to 8 inches of rain in a short period can overwhelm drainage systems and cause rapid rises in creeks and rivers. Understanding the scope and timing of the watch helps residents and local authorities prepare for possible evacuations or road closures. The alert also underscores the importance of heeding weather warnings, as flash flooding is one of the leading causes of weather related deaths in the United States.
WHAT TO WATCH
- Monitor local weather updates and any additional warnings or advisories issued by the National Weather Service.
- Pay attention to rainfall amounts and river levels, especially in areas north of Highway 34 where the heaviest rain is expected.
- Be prepared for possible flash flooding in low lying, poor drainage, and urban areas, and avoid driving through flooded roadways.
- Check on neighbors and family members who may be vulnerable or in flood prone locations.