Significant flooding occurred on the mainstem Mississippi largely due to the record snowfall this winter in Minnesota and Wisconsin, frozen ground, rapid snowmelt during the middle of April, and saturated soils.  Major flooding was observed at all sites along the Mississippi north of Keokuk Iowa and most sites saw one of their top 10 crests on record.
This flooding had numerous impacts, with many roads, businesses, homes, and people affected.

Flood in MERCER, ILLINOIS
From 26-APR-23 04:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: NEW BOSTON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at New Boston rose above its major flood stage of 18.5 feet during the early morning hours of April 26th,  The river continued to rise to 20.6 feet late in the day on April 30th.
The Mississippi River at Keithsburg rose above its major flood stage of 17.0 feet during the early morning hours of April 26th and continued to rise to 18.88 feet by the end of the month.

Flood in HENDERSON, ILLINOIS
From 26-APR-23 19:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: HEAPSVILLE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at Burlington rose above its major flood stage of 18.0 feet during the evening hours of April 26th.  The river continues to rise to 19.68 feet on the evening of April 30th.

Flood in JO DAVIESS, ILLINOIS
From 22-APR-23 18:37:00 to 30-APR-23 23:59:00 (CST-6)
Location: EAST DUBUQUE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rapid snow melt across Minnesota and Wisconsin caused the Mississippi River at Dubuque Lock and Dam 11 to rise above its major flood stage of 20.5 feet during the evening hours of April 22nd. The river crested at 25.59 feet on April 27th.  The river began to gradually fall but remain above major flood stage.

Flood in CARROLL, ILLINOIS
From 25-APR-23 01:48:00 to 30-APR-23 23:59:00 (CST-6)
Location: MS PALLISADES SP
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rapid snow melt from Minnesota and Wisconsin to rise quickly above its major flood stage. The river upstream at Bellevue rose above its major flood of 20.0 feet during the early morning hours of April 25th and remained above its major flood stage through the end of the month. Downstream at Fulton Illinois, the Mississippi River rose above its major flood stage of 20.0 feet on April 26th and remained above its major flood stage through the end of the month.

Flood in ROCK ISLAND, ILLINOIS
From 24-APR-23 12:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: ROCK IS
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at Rock Island Lock and Dam 15 rose above its major flood stage of 18.0 feet around mid day on  April 24th and continued to rise to its crest of 21.41 on the evening of April 30th.

Flood in HENDERSON, ILLINOIS
From 27-APR-23 04:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: GLADSTONE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at Gladstone rose above its major flood stage of 14 feet during the early morning hours of April 27th. It continued to rise to 15.6 feet during the evening hours of April 30th.

Flood in WHITESIDE, ILLINOIS
From 25-APR-23 23:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: FULTON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at Fulton Lock and Dam 13 rose above its major flood stage of 20.0 feet during late night hours of April 25th and continued to rise to its crest of 22.06 on the evening of April 30th.

Flood in JO DAVIESS, ILLINOIS
From 25-APR-23 01:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: BLANDING
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Rapid snow melt across Minnesota and Wisconsin caused the Mississippi River at Bellevue Lock and Dam 12 to rise above its major flood stage of 20.0 feet during the early morning hours of April 25th. The river crested at 20.87 feet on April 29th.  The river began to gradually fall but remain above major flood stage.

Flood in ROCK ISLAND, ILLINOIS
From 25-APR-23 16:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: LOUD THUNDER PARK
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at Illinois City rose above its major flood stage of 18 feet during the afternoon of April 25th.  It continued to rise to 1.05 feet during the evening hours of April 30th.

Flood in ROCK ISLAND, ILLINOIS
From 25-APR-23 08:00:00 to 30-APR-23 23:59:00 (CST-6)
Location: PORT BYRON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Mississippi River at Le Claire Lock and Dam 14 rose above its major flood stage of 13.5 feet during the morning hours of April 25th and continued to rise to its crest of 16.12 on the evening of April 30th.