A small line of thunderstorms developed in a near tropical atmosphere north of a warm from across southern Iowa into central Illinois. One storm became pulse severe in Muscatine County uprooting large oak trees southwest of Stockton, Iowa at the junction of county routes Y26 and F65.
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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.
A small line of thunderstorms developed in a near tropical atmosphere north of a warm from across southern Iowa into central Illinois. One storm became pulse severe in Muscatine County uprooting large oak trees southwest of Stockton, Iowa at the junction of county routes Y26 and F65. The storm weakened rapidly by the time it entered Scott County Iowa but managed to blow over some temporary construction signs weighted down by sandbags just south of Walcott on county route Y40. KDVN 88D velocity data suggests winds around 43 knots (50 mph) were reaching the surface. An RWIS 5 miles east northeast at the junction of Interstates 80 and 280 recorded 35 knots (40 mph winds).Boundaries left over from earlier thunderstorms allowed another pulse severe storm to develop in Bureau County Illinois. This storm produced nickel sized hail in Cherry, Illinois.
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 25, 8:10 AM CST, 1 hour 36 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 910 AM CDT MON JUL 25 2005 .UPDATE... UPDATING GRIDS/ZONES TO INCREASE COVERAGE OF PRECIP THIS MORNING WITH CONVECTIVE DEVELOPMENT IN THE SOUTHWEST CWA. DID NOT CHANGE TEMP GRIDS AS CLOUD COVERAGE IS STILL SCATTERED TO BROKEN AND AREAS SOUTH OF THE WARM FRONT IN PARTICULAR ARE WARMING QUICKLY. ..MAYES.. && .PREVIOUS UPDATE (ISSUED AT 720 AM)... SENDING ZONE/GRID UPDATE TO ADJUST FIRST PERIOD PCPN TO ACCOUNT FOR LATEST TRENDS WITH NEW CONVECTION RECENTLY FLARING UP ON OUTFLOW IN THE NORTHWEST ZONES. CAPPING WEAKER WITH INFLUX OF MOISTURE.. SO CAN/T RULE OUT CONVECTION AT ANY TIME.. THOUGH MOST FAVORABLE TIL MID MORNING AND AGAIN MID-LATE AFTN. MORE WIDESPREAD PCPN THOUGH STILL ON TAP FOR LATER THIS EVE AND OVERNIGHT ESP WEST OF THE MISSISSIPPI AS COLD FRONT MOVES INTO EASTERN IA. ALSO ADJUSTED MAX TEMPS DOWN A FEW DEGS MOST LOCATIONS DUE TO CONVECTIVE DEBRIS. KEPT HEAT ADVISORY BUT COULD BE MARGINAL WITH CLOUDS. ..05.. && .PREVIOUS DISCUSSION... .SYNOPSIS... HERE WE GO AGAIN.. THE RICH GET RICHER AND THE POOR GET POORER... :-( MCS PRODUCING HEFTY RAIN AMOUNTS IN NORTHWEST IA MOVING VERY SLOWLY E ALONG H850 FRONTAL ZONE.. WITH ZIPPER EFFECT DOWNSTREAM WITH NEW CONVECTION FIRING OVER NORTHEAST IA AND SOUTHWEST WI. CONVECTION ALSO ONGOING OVER EASTERN NE WITHIN THETA-E AND LLJ AXIS.. AND MOVING SLOWLY E/NE. ISOLD SHRA/TSRA HAVE BEEN DEVELOPING ACROSS FAR SOUTHEAST IA AND WEST CENTRAL IL AS PROFILERS SHOW BRANCH OF LLJ VEERING INTO THIS REGION. LATEST SFC ANALYSIS PLACES FRONTAL ZONE JUST INTO THE NORTHERN SECTIONS OF THE CWA AND EXTENDS WESTWARD TO LOW PRESSURE OVER NORTH CENTRAL NE. UPPER AIR CHARTS SHOW ZONAL FLOW ACROSS THE NORTHERN PLAINS AND UPPER MIDWEST WITH SEVERAL SHORTWAVES EMBEDDED WITHIN MEANWHILE...CENTER OF LARGE HEAT DOME HAS SHIFTED INTO THE LOWER MISSISSIPPI VALLEY. ..05.. && .SHORT TERM...(TODAY AND TONIGHT)... MAIN CONCERNS ARE WITH TEMPS AND HEAT ADVISORY...AND SEVERE WX POTENTIAL. MODELS SUGGEST SFC FRONT SHOULD LIFT NORTH TODAY AS LEAD SHORTWAVE AND ASSOCIATED SFC LOW LIFTS FROM NORTHERN PLAINS INTO THE UPPER MIDWEST. BUT.. CONCERNED THAT ONGOING CONVECTION AND OUTFLOW WITH LARGE BUBBLE HIGH DEVELOPING IN NORTHWEST IA MAY IMPEDE NORTHWARD MOVEMENT SOME... MORE THAN CURRENTLY FORECAST BY MODELS AND CLOSER TO 06Z ETA/NAM WHICH SUPPRESSES IT BACK SOUTH EVEN TO NORTH OF INTERSTATE 80 AND CONSEQUENTLY BRINGS CONVECTIVE COMPLEX INTO THE NORTH/WEST LATE THIS MORNING AND AFTN. ATTIM.. BASED ON MSAS 3 HR PRESSURE CHG PLOT SHOWING BUBBLE HIGH WEAKENING HAVE DISCARDED THIS SOLUTION. FOLLOWED BLEND OF GFS/UKMET FOR FORECAST DETAILS... WHICH SUGGEST BULK OF CONVECTION TODAY AND THIS EVE WILL BE TO OUR NORTH/WEST WITH CAP HOLDING MUCH OF AREA WITH LITTLE FORCING ASIDE FROM LLJ AND ISOLD ELEVATED CONVECTION THIS MORNING IN THE SOUTH. MAIN IMPACTS FROM MID LEVEL SHORTWAVE EJECTING FROM THE NORTHERN PLAINS TO BE FELT TO OUR NORTH... BUT HAVE CONTINUED WITH CHC POPS FAR NORTH BEING IN CLOSER PROXIMITY TO WAVE AND TO ACCOUNT FOR POTENTIAL OF SOME HOLD UP ON FRONTAL ZONE LIFTING NORTH DUE TO OUTFLOW. WILL BE FAIR AMOUNT OF CONVECTIVE DEBRIS ACROSS THE NORTH WHICH WILL LIMIT MAX TEMPS THERE.. SO WILL HANG ON TO HEAT ADVISORY SOUTH OF HIGHWAY 30...BUT EXTEND THROUGH THIS EVE WITH MANY AREAS HOLDING ABOVE 80 DEGS ON HEAT INDEX VALUES PER HOURLY GRIDS. WILL HAVE TO WATCH THE I 80 CORRIDOR.. AS EXPECT SOME DEBRIS THIS MORNING BUT HOPING TO CLEAR OUT ENOUGH TO BOOST TEMPS TO NEAR WARM END OF GUIDANCE THIS AFTN... WHICH ALONG WITH DEWPTS NR 70/ L70S SUPPORTS HEAT INDICES NEAR 105. WILL BE CLOSE. THE SOUTH LOOKS PRETTY SAFE TO SEE HIGH TEMPS AT/JUST ABOVE WARM END OF GUIDANCE AND CONSEQUENTLY HIT HEAT ADVISORY WITH PEAK INDICES OF 105-110 DEGS. SHOULD ISOLD CONVECTION PERSIST LONGER .. OR MORE CONVECTIVE DEBRIS BE FOUND... THEN THEY TOO COULD STRUGGLE. MID LEVEL WAVE AND ASSOCIATED SFC LOW WILL PASS TO OUR NORTH TONIGHT WITH COLD FRONT MOVING INTO THE NORTH/WEST AFTER MIDNIGHT...REACHING VICINITY OF MISSISSIPPI RIVER 12Z TUE. UNFORTUNATELY THIS TIMING AS WE HAVE SEEN IN RECENT MONTHS NOT BENEFICIAL FOR SUSTAINING HEAVY RAINS IN DROUGHT STRICKEN AREAS OF FAR EASTERN IA AND NORTHWEST/WEST CENTRAL IL. THOUGHTS ARE MCS WITH HEAVY RAIN WITH POTENTIAL FOR SEVERAL INCHES TO MOVE INTO NORTH/WEST LATE EVE/EARLY MORNING BUT THEN LIKELY TO SEE PROPAGATION TO THE SOUTH AS IT DIVES INTO MORE MOIST/UNSTABLE AIRMASS. SO THE RICH (WESTERN CWA) GET RICHER AND THE POOR (REST OF US) MAYBE NOT GET ANY POORER BUT LIKELY ONLY TO SEE LIGHT TO POSSIBLY SOME MODERATE QPF. WILL HAVE SEVERE THREAT WITH MCS MAINLY NORTH/WEST FOR DAMAGING WINDS WITH ISOLD LARGE HAIL POSSIBLE. MIN TEMPS TRICKY WITH FRONT.. HAVE 10+ DEG GRADIENT FROM NORTHWEST (COOLEST) TO SOUTHEAST (WARMEST). ..05.. .LONG TERM (TUESDAY THROUGH SUNDAY)... COLD FRONT SHOULD BE IN THE FAR NORTHWEST OR NORTHWEST THIRD OF THE CWFA AT 12Z TUESDAY...AROUND THE MISSISSIPPI BY 18Z AND OUT OF THE CWFA BY 00Z WEDNESDAY. FRONT WILL BE ARRIVING DURING THE DIURNAL MINIMUM SO PRECIP AMOUNTS WILL BE QUITE LIGHT FOR THE SOUTHEAST 2/3RDS OF THE CWFA. THE LIKELY POPS REFLECT THAT MOST AREAS SHOULD SEE A LITTLE RAINFALL. HELD ON TO POPS TUESDAY EVENING JUST IN CASE FRONT IS SLOWER THAN EXPECTED. WEDNESDAY THROUGH SUNDAY TO BE QUIET AND DRY. DIURNAL CHANGE IN TEMPS ON TUESDAY SHOULD NOT BE ALL THAT MUCH WITH EXPECTED LIGHT RAIN. PLEASANT TEMPS/HUMIDITY LEVELS FOR WED/THURS WITH TEMPS WARMING WITH TIME FRIDAY THROUGH SUNDAY. ..08.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...HEAT ADVISORY FOR EASTERN IOWA SOUTH OF HIGHWAY 30 UNTIL 12 AM TUESDAY. IL...HEAT ADVISORY FOR NORTHWEST AND WEST CENTRAL ILLINOIS SOUTH OF HIGHWAY 30 UNTIL 12 AM TUESDAY. MO...HEAT ADVISORY FOR SCOTLAND AND CLARK COUNTIES UNTIL 12 AM TUESDAY. && 05/08
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 749 AM CDT MON JUL 25 2005 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-261100- 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- 749 AM CDT MON JUL 25 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL IOWA...SOUTHEAST IOWA...NORTHWEST ILLINOIS...NORTHEAST MISSOURI... NORTHEAST IOWA...WEST CENTRAL ILLINOIS AND NORTH CENTRAL ILLINOIS. .DAY ONE...TODAY AND TONIGHT A HEAT ADVISORY IS IN EFFECT TODAY AND THIS EVENING FOR AREAS SOUTH OF HIGHWAY 30. HOT TEMPERATURES COMBINED WITH HIGH HUMIDITY WILL RESULT IN DANGEROUS AFTERNOON HEAT INDICES OF 105 TO 110 DEGREES. HEAT INDICES THIS EVENING WILL SLOWLY COOL INTO THE 80S BEFORE FALLING BELOW 80 DEGREES AFTER MIDNIGHT. ISOLATED TO SCATTERED THUNDERSTORMS WILL BE FOUND OVER THE OUTLOOK AREA THIS MORNING. NO SEVERE WEATHER IS ANTICIPATED WITH THIS ACTIVITY. ADDITIONAL SCATTERED THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON AND EARLY EVENING...MAINLY NORTH OF HIGHWAY 30. AN ISOLATED SEVERE THUNDERSTORM WILL BE POSSIBLE...WITH THE MAIN THREAT BEING DAMAGING WINDS OF 60 MPH. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO OVERSPREAD AREAS WEST OF THE MISSISSIPPI RIVER LATE THIS EVENING AND OVERNIGHT...AS A COLD FRONT MOVES INTO EASTERN IOWA. THERE IS A SLIGHT RISK THAT A FEW STORMS COULD BE SEVERE...MAINLY WEST OF A LINE FROM DUBUQUE...TO IOWA CITY...TO FAIRFIELD. TIMING OF THE SEVERE WEATHER THREAT WILL GENERALLY BE FROM 9 PM THROUGH 3 AM. THE MAIN THREAT WILL BE DAMAGING STRAIGHT LINE WINDS OF 60 MPH. HAIL UP TO NICKEL SIZE WILL BE A SECONDARY THREAT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS WILL BE ONGOING NORTH AND WEST OF A LINE FROM FREEPORT ILLINOIS TO KIRKSVILLE MISSOURI...AND OVERSPREAD THE ENTIRE AREA DURING THE DAY. SEVERE STORMS MAY BE POSSIBLE AS WELL. IF SEVERE STORMS DO OCCUR...HIGH WINDS WOULD BE THE PRIMARY THREAT. ANY LINGERING THUNDERSTORMS TUESDAY EVENING SHOULD DISSIPATE WITH SUNSET. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY TONIGHT INTO TUESDAY MORNING.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1009 AM CDT MON JUL 25 2005 IAZ040>042-051>054-063>068-076>078-087>089-098>099- ILZ001>002-007-009-015>018-024>026-034>035 -252200- BENTON IA-BUCHANAN IA-CEDAR IA-CLINTON IA-DELAWARE IA- DES MOINES IA-DUBUQUE IA-HENRY IA-IOWA IA-JACKSON IA- JEFFERSON IA-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA- LINN IA-LOUISA IA-MUSCATINE IA-SCOTT IA-VAN BUREN IA- WASHINGTON IA-BUREAU IL-CARROLL IL-HANCOCK IL- HENDERSON IL-HENRY IL-JO DAVIESS IL-MCDONOUGH IL- MERCER IL-PUTNAM IL-ROCK ISLAND IL-STEPHENSON IL- WARREN IL-WHITESIDE IL- THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 678 IN EFFECT UNTIL 5 PM CDT FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 13 COUNTIES IN NORTH CENTRAL ILLINOIS BUREAU PUTNAM IN NORTHWEST ILLINOIS CARROLL HENRY JO DAVIESS MERCER ROCK ISLAND STEPHENSON WHITESIDE IN WEST CENTRAL ILLINOIS HANCOCK HENDERSON MCDONOUGH WARREN IN IOWA THIS WATCH INCLUDES 21 COUNTIES IN EAST CENTRAL IOWA BENTON CEDAR CLINTON IOWA JACKSON JOHNSON JONES LINN MUSCATINE SCOTT IN NORTHEAST IOWA BUCHANAN DELAWARE DUBUQUE IN SOUTHEAST IOWA DES MOINES HENRY JEFFERSON KEOKUK LEE LOUISA VAN BUREN WASHINGTON THIS INCLUDES THE CITIES OF...ALEDO...ANAMOSA...BETTENDORF... BURLINGTON...CARTHAGE...CEDAR RAPIDS...CLINTON...DAVENPORT... DUBUQUE...FAIRFIELD...FORT MADISON...FREEPORT...GALENA... HENNEPIN...INDEPENDENCE...IOWA CITY...KEOSAUQUA...KEWANEE... MACOMB...MANCHESTER...MAQUOKETA...MARENGO...MOLINE...MONMOUTH... MOUNT CARROLL...MOUNT PLEASANT...MUSCATINE...OQUAWKA... PRINCETON...ROCK FALLS...ROCK ISLAND...SIGOURNEY...STERLING... TIPTON...VINTON...WAPELLO AND WASHINGTON.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1042 AM CDT MON JUL 25 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1036 AM TSTM WND GST 5 NNE MUSCATINE 41.49N 91.04W
07/25/2005 50 MPH MUSCATINE IA TRAINED SPOTTER
&&
DLFThe Quad Cities radar (KDVN), 29 km away, was scanning. The volume nearest the first event began at 15:45 UTC.
1 thunderstorm wind. Local standard time, as filed.
Estimated gust based on 83% of KDVN 88D winds of 66 knots (76 mph) at 600 AGL.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2005Every state in 2005This day in weather historyWarnings in Iowa, July 2005
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: 5466135.