Showers and thunderstorms moved northeastward across the area April 30th, as a cold front pushed into central Iowa. Non-severe hail up to the size of a penny was reported in parts of northeast Missouri.
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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.
Showers and thunderstorms moved northeastward across the area April 30th, as a cold front pushed into central Iowa. Non-severe hail up to the size of a penny was reported in parts of northeast Missouri.
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 30, 11:20 AM CST, 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1220 PM CDT FRI APR 30 2010 .DISCUSSION...PRELIMINARY... THIS PRODUCT HAS BEEN SENT EARLY DUE TO IMPENDING SEVERE WEATHER. VERY STRONG SHEAR...MODEST INSTABILITY...AND EXCEPTIONALLY STRONG FORCING WILL CONTINUE TO DRIVE STRONG TO SEVERE CONVECTION ALONG AND JUST BEHIND THE COLD FRONT THROUGH LATE EVENING OVER THE CWA. A MODERATE RISK FOR SEVERE STORMS...WITH THE PRIMARY THREAT BEING DAMAGING WINDS WILL BE FOUND OVER THE AREA UNTIL MID EVENING...WHEN THE ATMOSPHERE STABILIZES THROUGH A SUFFICIENTLY DEEP LAYER TO PREVENT DOWNDRAFTS FROM PUNCHING THROUGH TO THE SURFACE. BY 00Z...THE LIKELY MODE OF CONVECTION WILL BE A SEVERE SQUALL LINE...WITH TORNADO POTENTIAL CONTINUING ON ANY DISCRETE CELLS AHEAD OF IT...AND THROUGH ANY NOTCHES IN THE LINE. A FAST MOVEMENT OF CELLS NORTHEAST AT 50 TO 70 MPH WILL CONTINUE...WITH A SLOWER EASTWARD TRANSLATION EXPECTED AS FORCING AND FRONT MOVE EAST. STORMS AND RAINFALL SHOULD BE LARGELY DONE BY MIDNIGHT IN THE EAST. SATURDAY CONTINUES TO LOOK BREEZY AND PARTLY TO MOSTLY SUNNY...THEN CLOUDING UP TOWARD LATE AFTERNOON AND EVENING. ANOTHER STRONG WAVE OF UPPER ENERGY AND ASSOCIATED SURFACE LOW PRESSURE IS STILL EXPECTED TO CLIP AT LEAST THE SOUTHEAST 1/2 OF THE CWA SATURDAY NIGHT....WITH LIGHT TO MODERATE RAINFALL AMOUNTS. NO MAJOR CHANGES MADE TO THE FORECAST BEYOND SUNDAY...AS THE ECMWF CONTINUES TO BE PREFERRED TO THE GFS AND NAM. THIS MORE OR LESS INDICATES A MILD FORECAST...WITH THE NEXT CHANCE FOR SIGNIFICANT RAINFALL BY THURSDAY NIGHT AND FRIDAY. ..ERVIN.. && .AVIATION... VFR CONDITIONS WILL ERODE QUICKLY FROM THE SOUTHWEST THROUGH 22Z THIS AFTERNOON WITH APPROACHING VERY FAST MOVING THUNDERSTORMS OUT OF NORTHERN MO. VERTICAL WIND PROFILES SUGGEST VERY TURBULENT AIRMASS ALOFT FROM 2K-12000 FT AGL...BUT GENERALLY UNIDIRECTIONAL FROM THE SOUTHWEST. PRIME CONVECTION WINDOW IMPACTING THE TERMINALS LOOKS TO BE FROM 22Z FRI THROUGH 03Z SAT. STORMS MAY MIX DOWN WIND GUSTS OVER 50 KTS FROM THE WEST TO SOUTHWEST AT BRL AND MLI AROUND 00Z SAT. AFTER STORMS EXIT...EXPECT SOUTHWEST SFC WINDS FROM 220-250 DEGREES AT 10-15 KTS AND CIGS RISING ABOVE 5K FT. ..12.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && ERVIN/12
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 528 AM CDT FRI APR 30 2010 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-011030- 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- 528 AM CDT FRI APR 30 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 SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS THE ENTIRE OUTLOOK AREA FROM LATE THIS AFTERNOON INTO THE EVENING HOURS. LARGE HAIL AND DAMAGING WIND WILL BE THE PRIMARY THREATS...WITH TORNADOES POSSIBLE AS WELL. THE STORM PREDICTION CENTER HAS PLACED THE ENTIRE AREA IN A SLIGHT RISK. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AROUND MID AFTERNOON AS A COLD FRONT APPROACHES FROM THE WEST. DEEP...STRONG WIND SHEAR AND MODERATE INSTABILITY WILL BE SUFFICIENT TO PRODUCE SCATTERED SUPERCELL THUNDERSTORMS. SOME OF THESE STORMS MAY BE CAPABLE OF PRODUCING VERY LARGE HAIL OVER 2 INCHES IN DIAMETER... WIND GUSTS OVER 60 MPH AND POSSIBLE TORNADOES...PRIMARILY LATE AFTERNOON WEST OF THE MISSISSIPPI RIVER. AFTER 7 PM...THE MAIN SEVERE WEATHER THREAT WILL SPREAD INTO ILLINOIS AND LIKELY TRANSITION TO DAMAGING WINDS...HEAVY DOWNPOURS AND HAIL AROUND 1 INCH IN DIAMETER AS STORMS ORGANIZE INTO MORE LINEAR COMPLEXES. THUNDERSTORMS ARE EXPECTED TO EXIT EAST OUT OF MOST OF WEST CENTRAL AND NORTHWEST ILLINOIS AFTER 1 AM. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE OF THUNDERSTORMS SATURDAY NIGHT...PRIMARILY SOUTH OF HIGHWAY 34. SEVERE WEATHER IS NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING. DLS
The Quad Cities radar (KDVN), 188 km away, was scanning. The volume nearest the first event began at 17:29 UTC.
1 hail. Local standard time, as filed.
Non-severe hail (<1.0) fell about 3 miles west of Memphis, MO at 1230 pm April 30.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2010Every state in 2010This day in weather historyWarnings in Missouri, 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: 218982.