An upper level disturbance combined with outflow boundaries from early morning convection to initiate thunderstorms in a near tropical atmosphere. Two storms pulsed severe and produced a couple of severe wind reports and marginally severe hail.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
An upper level disturbance combined with outflow boundaries from early morning convection to initiate thunderstorms in a near tropical atmosphere. Two storms pulsed severe and produced a couple of severe wind reports and marginally severe hail.
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 Jul 3, 2:30 PM CST, 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 330 PM CDT MON JUL 3 2006 .DISCUSSION... THUNDERSTORM COVERAGE AND STRENGTH/SEVERE POTENTIAL MAIN CONCERN THIS EVE...THEN FOCUS SHIFTS MAINLY TO TEMPS REST OF THE WEEK AS UNSEASONABLY STRONG CANADIAN HIGH SET TO DOMINATE AND BRING REFRESHING AIRMASS TO REGION. LATEST SFC ANALYSIS PLACES COLD FRONT FROM WESTERN WI TO WEAK LOW INVOF KCID. PRESSURE FALLS SUPPORTIVE OF LOW TRANSLATING EASTWARD INTO THE EARLY EVE. AIRMASS VERY UNSTABLE (MLCAPES 2500-3500 J/KG... LI/S -4 TO -7) WITH 0-6KM BULK SHEAR OF 30 TO 40 KTS INCREASING FROM NORTH TO SOUTH. 18Z DVN SOUNDING SHOWS WEAK CAP IN PLACE AND WILL EASILY BE OVERCOME BY STRENGTHENING LARGE SCALE ASCENT FROM RRQ OF H3 JET STREAK AND MID LEVEL SHORTWAVE MOVING INTO NORTHWEST IA ATTIM... AND IN FACT KDMX WSR-88D SHOWS CONVECTION NOW BREAKING OUT RAPIDLY IN NORTH AND WEST CENTRAL IA AND LIKELY TO MOVE IN A BIT LATER ON... WITH ADDITIONAL DEVELOPMENT POSSIBLE OUT AHEAD AT ANY TIME... WITH ONE FAVORED AREA IN PORTIONS OF EAST CENTRAL IA AND NORTHWEST IL AHEAD OF WEAK SFC LOW. HIGH FREEZING LEVEL SUPPORTS MAIN THREAT BEING DAMAGING STRAIGHT LINE WINDS OR MICROBURSTS WITH COLLAPSING CORES WITH BLEP USING TEMP/DEWPT SUGGESTS WINDS 60 TO 70 MPH... FEW LOCATIONS NEAR 90 DEGS COULD SEE HIGHER WINDS OF AROUND 80 MPH. PCPN CHCS GRADUALLY DIMINISH FROM NORTH TO SOUTH LATER THIS EVE AND OVERNIGHT WITH FRONTAL PASSAGE. KEPT PCPN CHCS IN THE SOUTH TOMORROW WITH FRONT EXITING FAR SOUTH EARLY AFTN. FIREWORKS LOOK TO BE A GO ALL AREAS FOR THE 4TH AND PERFECT TIMING WITH INFLUX OF DRIER AIR AND LIGHT NORTH WINDS MAKING FOR FANTASTIC VIEWING CONDITIONS. BASED ON TEMPS THIS AFTERNOON IN MN AND WI...WENT TOWARD WARM END OF GUIDANCE FOR MAXES ON TUE... FEW DEGS COOLER FOR WED. AS FOR LOWS WENT WITH BLEND FOR TONIGHT FAVORING WARMER SIDE SOUTHERN 1/3 TO 1/2... AND THEN SIDED GENERALLY AT OR BELOW LOW END OF GUIDANCE TUE NIGHT AND WED NIGHT WITH INCOMING CANADIAN ANTICYCLONE. LONG TERM...THURSDAY THROUGH MONDAY... LARGE CANADIAN SFC HIGH WILL PROVIDE GORGEOUS SUMMER WX WITH DRY CONDITIONS AND LOW HUMIDITY INTO THE WEEKEND. THE DRY AIR AND LIGHT FLOW WILL AID LARGE DIURNAL SWINGS. WITH THE HIGH PRESSURE OVERHEAD EXPECT WIDESPREAD 50S FOR LOWS BOTH THURS AND FRI MORNINGS... AND MIN TEMP FCST TECHNIQUE USING PROGGED H85 TEMPS SUGGESTS POTENTIAL FOR FEW U40S TO AROUND 50 DEGS IN FAVORED SHELTERED LOCALES. TEMPS TO MODERATE OVER THE WEEKEND INTO EARLY NEXT WEEK AS UPPER HEIGHTS INCREASE AND H85 TEMPS WARM ON BACKSIDE OF RETREATING RIDGE. INTRODUCED CHC POPS LATE SUN-MON WITH SFC TROUGH IN PLAINS AND ENERGY TRAVERSING NORTHERN TIER OF STATES WITHIN MAIN WESTERLIES. NORTHWEST FLOW WILL PROVIDE POTENTIAL FOR REMNANTS OF CONVECTIVE COMPLEXES TO SPILL DOWN INTO CWA. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. 05
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 255 PM CDT MON JUL 3 2006 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-041000- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO- CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL- HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA- JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA- MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL- SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL- WASHINGTON IA-WHITESIDE IL- 255 PM CDT MON JUL 3 2006 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...LATE AFTERNOON AND EVENING A SLIGHT RISK OF SEVERE THUNDERSTORMS CONTINUES OVER THE ENTIRE AREA FOR LATE THIS AFTERNOON AND THIS EVENING. LATEST INDICATIONS SUGGEST THE MAIN SEVERE WEATHER THREAT WILL FROM DAMAGING WIND GUSTS OF 60 TO 70 MPH. A SECONDARY THREAT MAY BE FROM HAIL UP TO THE SIZE OF QUARTERS...OR AN INCH IN DIAMETER. A COLD FRONT MOVING SOUTHEAST INTO A UNSTABLE AIRMASS OVER THE REGION WILL BE THE FOCUS FOR SCATTERED THUNDERSTORM DEVELOPMENT LATE THIS AFTERNOON AND THIS EVENING. SOME OF THESE STORMS MAY BE SEVERE...PRODUCING DAMAGING WIND AND LARGE HAIL. AT THIS TIME IT APPEARS THAT THE ENTIRE AREA IS AT RISK FOR SOME STRONG TO SEVERE THUNDERSTORM ACTIVITY THROUGH 9 PM THIS EVENING. AREAS ALONG AND SOUTH OF THE INTERSTATE 80 CORRIDOR IN EASTERN IOWA...AND IN FAR NORTHEAST MISSOURI INTO PORTIONS OF WEST CENTRAL ILLINOIS THAT HAVE WARMED CLOSE TO 90 DEGREES WITH DEWPOINTS IN THE LOWER 70S WILL BE MORE AT RISK OF EXPERIENCING SEVERE THUNDERSTORMS. THESE AREAS MAY ALSO HAVE A HIGHER DAMAGING WIND GUST POTENTIAL OF UP TO 80 MPH. STAY TUNED FOR POSSIBLE WATCHES AND WARNINGS THAT MAY BE ISSUED THROUGH THIS EVENING. .DAYS TWO THROUGH SEVEN...THE FOURTH OF JULY THROUGH SUNDAY A FEW THUNDERSTORMS WILL STILL BE POSSIBLE TUESDAY MORNING...SOUTH OF HIGHWAY 34. THESE STORMS ARE NOT EXPECTED TO BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED BY THIS EVENING. 12
The Quad Cities radar (KDVN), 90 km away, was scanning. The volume nearest the first event began at 21:01 UTC.
2 thunderstorm wind, 1 hail, 1 heavy rain. Local standard time, as filed.
corn flattened with pea size hail on the Bryan Lasek farm
corn flattened with pea hail on the Rick Gerot farm
dime size hail
measured 46 knot (53 mph) gust at 1532 CST along with pea size hail
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2006Every state in 2006This day in weather historyWarnings in Iowa, July 2006
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: 5527443, 5527444, 5527445, 5527446.