5 feet on April 9th around 815 am. 53 feet around 430 pm April 9.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS DVN wrote it up.
Heavy rains during the first week or so of April resulted in the Iowa River at Marengo going above the moderate flood stage level of 15.5 feet on April 9th around 815 am. It crested around 15.53 feet around 430 pm April 9. It fell below the moderate flood stage level around 145 am April 10.
The local office's own words before the first event, 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 the first event at Apr 9, 1:30 AM CST, 6 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 230 AM CDT FRI APR 9 2010 .SYNOPSIS... HIGH PRESSURE RIDGE FROM WESTERN WISCONSIN TO ARKANSAS BRINGING CLEAR BUT COLD TEMPERATURES TO THE REGION. TEMPERATURES CURRENTLY WERE MAINLY IN THE 30S ACROSS THE DVN CWA. MEANWHILE...READINGS WERE MOSTLY IN THE 40S IN THE PLAINS DUE TO RETURN SOUTHERLY FLOW AHEAD OF LOW PRESSURE IN THE WESTERN DAKOTAS. ..HAASE.. && .SHORT TERM...TODAY AND TONIGHT... HIGH PRESSURE RIDGE WILL GRADUALLY PUSH OFF TO THE EAST BRINGING WARMER TEMPERATURES AS WINDS TURN WEST TO SOUTHWEST THIS AFTERNOON AND THEN SOUTHEAST TO SOUTH TONIGHT. WALL TO WALL SUNSHINE TODAY WITH DRY AIRMASS IN PLACE WITH CU RULE SUGGESTING LITTLE IF ANY FAIR WEATHER CU. TEMPERATURES SHOULD REBOUND NICELY FROM THE COLD START EARLY THIS MORNING...WITH MAX READINGS THIS AFTERNOON RANGING FROM THE MID 50S IN OUR FAR NORTHEAST CWA TO THE MID 60S IN OUR FAR SOUTHWEST CWA. TONIGHT...THERE WILL BE A WEAK COLD FRONT PUSHING INTO WESTERN WI TO NORTHWEST IA BY 12Z SATURDAY. THERE WILL BE SOMEWHAT OF AN INCREASE IN MID AND HIGH CLOUDS ACROSS THE NORTHERN CWA LATER TONIGHT...BUT THE BULK OF THE CLOUDS AND ANY PRECIPITATION SHOULD REMAIN WELL TO OUR NORTH AS SHORT WAVE TRACKS ACROSS NORTHERN MN. MIN TEMPERATURES SHOULD BE MAINLY IN THE LOWER TO MID 40S. ..HAASE.. .LONG TERM...SATURDAY THROUGH THURSDAY... THE BACKDOOR FRONT SHOULD SAG SOUTHWARD THROUGH THE CWA TOWARD LATE SATURDAY AFTERNOON. AHEAD OF THE EXPECTED FRONT...DECENT SUNSHINE AND MIXING SHOULD ALLOW FOR A SOLID WARM UP INTO THE MID 60S NORTH TO LOWER 70S CENTRAL AND SOUTH. THE FRONT INITIALLY SHOULD AMOUNT TO ONLY A WIND SWITCH BY LATE AFTERNOON. HOWEVER...SOME MOISTURE CONVERGENCE IS SHOWN BY MODELS TOWARD EVENING...AND INCREASES OVERNIGHT. SATURATION LOOKS MOST LIKELY AFTER 00Z SUNDAY OVER THE NORTH...WHERE LIGHT RAINFALL IS POSSIBLE. SUNDAY...THE EXPECTATION FOR RAIN LOOKS LIMITED DUE TO THE MAIN FOCUS FOR LIFT FOUND TOO FAR EAST AND WEST. DESPITE BEING NEAR THE FRONT...THIS LOOKS TO BE A QUIET DAY. SUNDAY NIGHT INTO MONDAY HOWEVER LOOK POTENTIALLY MORE UNSETTLED AS MODELS SHOW A SHORT WAVE OVER TOPPING THE FLAT RIDGE AS WE BEGIN AN WAA REGIME WHICH CARRIES INTO THE WEEK AHEAD. THIS COULD FIRE SOME ELEVATED THUNDERSTORMS AND SHOWERS SUNDAY NIGHT...LASTING INTO MONDAY. FROM HERE...MODELS DIVERGE ON THE STRENGTHENING UPPER RIDGE AND ITS POSITION. THE GFS SEEMS TO ERROR SIGNIFICANTLY IN TAKING A TEXAS MCS AND CREATING A GULF UPPER LOW FROM IT...THUS RESULTING IN A MID WEEK REX BLOCK PATTERN. THE ECMWF HAS A SUSPICIOUSLY STRONG EAST COAST UPPER LOW RESULTING IN ADDITIONAL BLOCKING. THE UKMET IS LESS BLOCKY WITH NEITHER FEATURE SHOWN TO BE STRONG. THAT SAID...THERE IS LITTLE CONFIDENCE IN THE PATTERN BEYOND A GENERAL WARM UP STARTING MONDAY. NO CHANGES HAVE BEEN MADE BEYOND MONDAY. ..ERVIN.. && .AVIATION... VFR CONDS TODAY AND TONIGHT. SKC TODAY WITH AN INCREASE IN MID AND HIGH LEVELS CLOUDS TONIGHT ESPECIALLY NORTH OF HIGHWAY 30. WINDS VRB03KT OR CALM THIS MORNING...THEN WEST TO SOUTHWEST LESS THAN 10 KNOTS THIS AFTERNOON. SOUTHEAST TO SOUTH WINDS LESS THAN 10 KNOTS TONIGHT. ..HAASE.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && HAASE/ERVIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 357 AM CDT FRI APR 9 2010 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-100900- BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- 357 AM CDT FRI APR 9 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS SUNDAY NIGHT AND MONDAY. SEVERE WEATHER APPEARS UNLIKELY AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. ERVIN
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Heavy rains during the first week or so of April resulted in the Iowa River at Marengo going above the moderate flood stage level of 15.5 feet on April 9th around 815 am. It crested around 15.53 feet around 430 pm April 9. It fell below the moderate flood stage level around 145 am April 10.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2010Every state in 2010This day in weather historyWarnings in Iowa, April 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 219570.