Alert archive / Iowa / River Flood Warnings in 2026

River Flood Warning 22, NWS Quad Cities, IA

April 16, 2026Louisa County, Iowa; Mercer County, Illinois

NWS Quad Cities, IA issued this river flood warning at Apr 16, 2026, 11:30 AM CDT for Louisa County, Iowa; Mercer County, Illinois. It took effect at Apr 17, 2026, 10:38 PM CDT. It was in force for 20 days.

The area

The counties it named.

The facts

Issued: Apr 16, 2026, 11:30 AM CDT (16:30 UTC)
In effect from: Apr 17, 2026, 10:38 PM CDT
Expired: May 7, 2026, 11:30 AM CDT
In force: 20 days
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: Minor

Counties Louisa County, IA, Mercer County, IL

The radar

The Quad Cities radar (KDVN), 57 km from the middle of the area, began a volume at 16:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Mississippi River at New Boston (NBOI2).

Action stage: 14 ft
Minor stage: 15 ft
Moderate stage: 16.5 ft
Major stage: 18.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this river flood warning went out at Apr 16, 6:22 AM CDT, 5 hours 8 minutes earlier.

Area forecast discussion, Apr 16, 6:22 AM CDT, 5 hours 8 minutes before

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Hazardous weather outlook, Apr 16, 3:38 AM CDT, 7 hours 52 minutes before

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In the hours before

Special weather statement, Apr 16, 8:28 AM CDT, 3 hours 2 minutes before

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Local storm report, Apr 16, 10:36 AM CDT, 54 minutes before

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The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 15, 7:00 PM CDT	Flash Flood Warning	DVN	Buchanan, Delaware, Dubuque, Jackson, Jones, Linn	4 hr
Apr 15, 7:09 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Keokuk, Louisa, Washington	66 min
Apr 15, 7:51 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Louisa, Muscatine, Scott	54 min
Apr 15, 8:02 PM CDT	Tornado Warning Tornado observed	DVN	Louisa, Muscatine	28 min
Apr 15, 8:13 PM CDT	Tornado Warning	DVN	Lee	47 min
Apr 15, 8:14 PM CDT	Flash Flood Warning	DVN	Jackson, Jones	3 hr
Apr 15, 8:30 PM CDT	Tornado Warning	DVN	Muscatine, Scott	17 min
Apr 15, 9:17 PM CDT	River Flood Warning	DVN	Johnson, Washington	34 hr
Apr 15, 9:26 PM CDT	River Flood Watch	DVN	Louisa, Muscatine	21 days
Apr 16, 10:25 AM CDT	River Flood Warning	DVN	Louisa, Muscatine	6 days
Apr 16, 10:27 AM CDT	River Flood Warning	DVN	Louisa	7 days
Apr 16, 10:27 AM CDT	River Flood Warning	DVN	Louisa	68 hr
Apr 16, 11:30 AM CDT	River Flood Watch	DVN	Dubuque, Jackson	21 days
Apr 16, 11:30 AM CDT	River Flood Warning	DVN	Des Moines, Louisa	21 days
Apr 16, 11:30 AM CDT	River Flood Warning	DVN	Louisa, Muscatine	12 days
Apr 15, 7:14 PM CDT	Flash Flood Warning	DVN	Jo Daviess, Stephenson	3 hr
Apr 15, 7:59 PM CDT	Tornado Warning	DVN	Stephenson	20 min
Apr 15, 8:24 PM CDT	Tornado Warning	DVN	Mercer, Rock Island	39 min
Apr 15, 10:26 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	19 min
Apr 16, 10:43 AM CDT	River Flood Warning	DVN	Henry, Rock Island, Whiteside	16 days
Apr 16, 10:43 AM CDT	River Flood Warning	DVN	Henry, Rock Island	21 days
Apr 16, 10:43 AM CDT	River Flood Warning	DVN	Whiteside	6 days
Apr 16, 11:30 AM CDT	River Flood Warning	DVN	Hancock	21 days

Nearby

River Flood Warnings in Iowa, 2026 River Flood Warnings in Illinois, 2026 Every river flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.