A cluster of showers and thunderstorms moved through the area producing damaging wind.
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.
A cluster of showers and thunderstorms moved through the area producing damaging wind.
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 Aug 7, 8:41 PM CST, 39 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
941 PM CDT TUE AUG 7 2007
.UPDATE...
CONVECTIVE COMPLEX MOVING THROUGH SOUTHERN CWA ATTIM IN ASSOCIATION
WITH MCV LIFTING UP INTO SOUTHERN IA. NEWLY DEVELOPED CONVECTION
BLOSSOMING ON WARM ADVECTION WING ALONG THE I 80 CORRIDOR AND
LOOKS TO INTERSECT COMPLEX. ALSO...RECENT CONVECTION DEVELOPING IN
SOUTHWEST IA AS INCREASING LLVL JET RIDES UP AND OVER COLD POOL.
THIS CONVECTION LOOKS TO MOVE BACK IN OVERNIGHT. HIGH MOISTURE LEVELS
(DEWPTS 74-79 AND PW/S IN EXCESS OF 2 INCHES) AND WEAK WINDS
FAVOR SLOW MOVING STORMS CONTAINING TORRENTIAL RAIN (RATES UP TO
2 INCHES/HR) WITH POTENTIAL FOR BACKBUILDING/TRAINING AS LOW LEVEL
JET VEERS AND IMPINGES ON BOUNDARY OVERNIGHT. POTENTIAL FOR 4+ INCHES
OF RAIN IN AREAS THAT SEE REPEATED DEVELOPMENT. HAVE GONE AHEAD AND
ISSUED A FLASH FLOOD WATCH FOR AREAS ALONG AND JUST NORTH OF THE
BOUNDARY ... OR ROUGHLY BETWEEN HIGHWAY 30 AND HIGHWAY 34.
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...FLASH FLOOD WATCH UNTIL 7 AM CDT WEDNESDAY FOR CEDAR-CLINTON-DES
MOINES-HENRY IA-IOWA-JEFFERSON-JOHNSON-KEOKUK-LOUISA-
MUSCATINE-SCOTT-WASHINGTON.
HEAT ADVISORY UNTIL 7 PM CDT THURSDAY FOR DES MOINES-HENRY IA-
JEFFERSON-LEE-VAN BUREN.
IL...FLASH FLOOD WATCH UNTIL 7 AM CDT WEDNESDAY FOR BUREAU-HENDERSON-
HENRY IL-MERCER-PUTNAM-ROCK ISLAND-WARREN-WHITESIDE.
HEAT ADVISORY UNTIL 7 PM CDT THURSDAY FOR HANCOCK-HENDERSON-
MCDONOUGH-WARREN.
MO...HEAT ADVISORY UNTIL 7 PM CDT THURSDAY FOR CLARK-SCOTLAND.
&&HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 445 AM CDT TUE AUG 7 2007 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-080945- 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- 445 AM CDT TUE AUG 7 2007 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 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT...MAINLY SOUTH OF HIGHWAY 20. ONGOING STORMS THIS MORNING WILL DIMINISH AND EXIT THE AREA BY MIDDAY. THUNDERSTORMS ARE EXPECTED TO DEVELOP AGAIN IN EVENING HOURS MAINLY WEST OF THE AREA AND MOVE IN THROUGH THE LATE EVENING AND OVERNIGHT HOURS...WITH THE HIGHEST CHANCES SOUTH OF HIGHWAY 30. THE MAIN THREAT FROM THESE STORMS WILL BE FROM HEAVY RAINFALL. WITH THE WARM AND MOIST AIRMASS IN PLACE...THE RISK FOR HAIL IS LOW...WITH WIND THE MOST LIKELY SEVERE WEATHER THREAT. A HEAT ADVISORY IS IN EFFECT SOUTH OF A LINE FROM FAIRFIELD TO GALESBURG AS OPPRESSIVELY HOT AND HUMID AIR WILL REMAIN IN PLACE. IN ADDITION...LOCATIONS ALONG AND SOUTH OF INTERSTATE 80 BUT NORTH OF THE ADVISORY MAY SEE HEAT INDEX READINGS OVER 100 TODAY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WEDNESDAY...MAINLY FOR THE EVENING AND OVERNIGHT HOURS WEDNESDAY NIGHT. INSTABILITY IN THE WARM AND MOIST AIRMASS OVER THE AREA...ALONG WITH A NEARLY STATIONARY FRONT PROVIDING A FOCUS FOR ACTIVITY...WILL AID THUNDERSTORMS MOVING ACROSS THE AREA LATER ON WEDNESDAY. THE MAIN THREATS AGAIN WILL BE HEAVY RAINFALL AND DAMAGING WINDS. THUNDERSTORMS ARE ALSO POSSIBLE ON THURSDAY...THOUGH THE CHANCE OF SEVERE THUNDERSTORMS IS LOWER. THE HEAT ADVISORY REMAINS IN EFFECT THROUGH THURSDAY EVENING...WHEN A WEAK COLD FRONT MAY PROVIDE TEMPORARY RELIEF FROM AT LEAST THE HUMIDITY. HOT TEMPERATURES AND INCREASING HUMIDITY ARE EXPECTED THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND OVERNIGHT. ALSO...ANY REPORTS OF HEAVY RAINFALL OVER 1 INCH OR FLOODING ARE ENCOURAGED. MAYES
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 723 PM CDT TUE AUG 7 2007 IAZ076-087-098-080300- JEFFERSON IA-KEOKUK IA-VAN BUREN IA- 723 PM CDT TUE AUG 7 2007 ...STRONG THUNDERSTORMS WITH TORRENTIAL RAIN... NUMEROUS THUNDERSTORMS OVER SOUTH CENTRAL IOWA WILL DRIFT EAST AT 15 TO 20 MPH INTO MUCH OF THE AREA BY 10 PM. A SEVERE THUNDERSTORM WITH DAMAGING STRAIGHT LINE WINDS IN EXCESS OF 60 MPH WILL BE POSSIBLE. THE MAIN THREAT HOWEVER WILL BE TORRENTIAL RAIN AND THE POTENTIAL FOR FLASH FLOODING...WITH RAINFALL RATES OF 2 INCHES OR MORE IN AN HOUR. AS THE STORMS MOVE IN...EXPECT EXTREMELY HEAVY RAIN GREATLY REDUCING VISIBILITY... AND LEADING TO FLOODING OF LOW LYING OR POORLY DRAINED AREAS SUCH AS DITCHES AND UNDERPASSES. 05
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 811 PM CDT TUE AUG 7 2007 IAZ051-063-064-076-077-087-088-098-099-MOZ009-010-080300- BENTON IA-CLARK MO-HENRY IA-IOWA IA-JEFFERSON IA-JOHNSON IA- KEOKUK IA-LEE IA-SCOTLAND MO-VAN BUREN IA-WASHINGTON IA- 811 PM CDT TUE AUG 7 2007 ...THUNDERSTORMS WITH TORRENTIAL RAIN AND STRONG WINDS... NUMEROUS THUNDERSTORMS OVER SOUTH CENTRAL IOWA WILL MOVE EAST NORTHEAST AT 15 TO 25 MPH INTO MUCH OF THE AREA BY 10 PM. THE MAIN THREATS WITH THESE STORMS WILL BE TORRENTIAL RAIN WITH RATES OF 2 INCHES IN AN HOUR...STRONG GUSTY WINDS OF 30 TO 50 MPH...AND DANGEROUS AND FREQUENT LIGHTNING. AS THE STORMS MOVE IN...EXPECT EXTREMELY HEAVY RAIN GREATLY REDUCING VISIBILITY...AND LEADING TO FLOODING OF LOW LYING OR POORLY DRAINED AREAS SUCH AS DITCHES AND UNDERPASSES. 05
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 916 PM CDT TUE AUG 7 2007 IAZ051-063-064-076-077-087-088-098-099-MOZ009-010-080500- BENTON IA-CLARK MO-HENRY IA-IOWA IA-JEFFERSON IA-JOHNSON IA- KEOKUK IA-LEE IA-SCOTLAND MO-VAN BUREN IA-WASHINGTON IA- 916 PM CDT TUE AUG 7 2007 ...THUNDERSTORMS WITH TORRENTIAL RAIN AND STRONG WINDS... THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE AREA THROUGH MIDNIGHT. THE STRONGEST STORMS WILL BRING TORRENTIAL RAIN WITH RAINFALL RATES OF 1 TO 2 INCHES IN LESS THAN AN HOUR...STRONG GUSTY WINDS OF 30 TO 50 MPH...AND DANGEROUS AND FREQUENT LIGHTNING. AS THE STORMS MOVE IN...EXPECT EXTREMELY HEAVY RAIN GREATLY REDUCING VISIBILITY...WITH SOME FLOODING OF LOW LYING OR POORLY DRAINED AREAS SUCH AS DITCHES AND UNDERPASSES. IAZ065-067-068-078-089-ILZ015-016-024-025-034-080500- CEDAR IA-DES MOINES IA-HANCOCK IL-HENDERSON IL-HENRY IL-LOUISA IA- MERCER IL-MUSCATINE IA-ROCK ISLAND IL-SCOTT IA- 916 PM CDT TUE AUG 7 2007 ...THUNDERSTORMS WITH VERY HEAVY RAIN DEVELOPING... THUNDERSTORMS WILL CONTINUE TO DEVELOP AND BECOME WIDESPREAD THROUGH MIDNIGHT. THE STRONGEST STORMS WILL BRING TORRENTIAL RAIN WITH RAINFALL RATES OF 1 TO 2 INCHES IN LESS THAN AN HOUR...LEADING TO SOME FLOODING OF LOW LYING OR POORLY DRAINED AREAS. DANGEROUS AND FREQUENT LIGHTNING CAN ALSO BE EXPECTED...WITH STRONG GUSTY WINDS OF 30 TO 50 MPH AND SMALL HAIL ALSO POSSIBLE. 05
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
934 PM CDT TUE AUG 07 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0930 PM HEAVY RAIN WHAT CHEER 41.40N 92.35W
08/07/2007 M1.55 INCH KEOKUK IA TRAINED SPOTTER
RAINFALL TOTAL FROM 830 TO 930 P.M. LIGHT RAIN STILL
FALLING.
&&
MIKEZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
936 PM CDT TUE AUG 07 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0931 PM HEAVY RAIN VICTOR 41.73N 92.29W
08/07/2007 U0.00 INCH IOWA IA EMERGENCY MNGR
HEAVY RAINFALL CAUSING STREET FLOODING AROUND THE TOWNS
OF VICTOR AND MARENGO.
&&
MIKEZSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1000 PM CDT TUE AUG 7 2007 IAZ051-052-063-064-076-077-087-088-098-099-MOZ009-010-080500- BENTON IA-CLARK MO-HENRY IA-IOWA IA-JEFFERSON IA-JOHNSON IA- KEOKUK IA-LEE IA-LINN IA-SCOTLAND MO-VAN BUREN IA-WASHINGTON IA- 1000 PM CDT TUE AUG 7 2007 ...THUNDERSTORMS WITH TORRENTIAL RAIN AND STRONG WINDS... THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE AREA THROUGH MIDNIGHT. THE STRONGEST STORMS WILL BRING TORRENTIAL RAIN WITH RAINFALL RATES OF 1 TO 2 INCHES IN LESS THAN AN HOUR...STRONG GUSTY WINDS OF 30 TO 50 MPH...AND DANGEROUS AND FREQUENT LIGHTNING. AS THE STORMS MOVE IN...EXPECT EXTREMELY HEAVY RAIN GREATLY REDUCING VISIBILITY...WITH SOME FLOODING OF LOW LYING OR POORLY DRAINED AREAS SUCH AS DITCHES AND UNDERPASSES. IAZ053-065-067-068-078-089-ILZ015-016-024>026-034-035-080500- CEDAR IA-DES MOINES IA-HANCOCK IL-HENDERSON IL-HENRY IL-JONES IA- LOUISA IA-MCDONOUGH IL-MERCER IL-MUSCATINE IA-ROCK ISLAND IL- SCOTT IA-WARREN IL- 1000 PM CDT TUE AUG 7 2007 ...THUNDERSTORMS WITH VERY HEAVY RAIN BECOMING WIDESPREAD... THUNDERSTORMS WILL CONTINUE TO DEVELOP AND BECOME WIDESPREAD THROUGH MIDNIGHT. THE STRONGEST STORMS WILL BRING TORRENTIAL RAIN WITH RAINFALL RATES OF 1 TO 2 INCHES IN LESS THAN AN HOUR...LEADING TO SOME FLOODING OF LOW LYING OR POORLY DRAINED AREAS. DANGEROUS AND FREQUENT LIGHTNING CAN ALSO BE EXPECTED...WITH STRONG GUSTY WINDS OF 30 TO 50 MPH AND SMALL HAIL ALSO POSSIBLE. 05
The Quad Cities radar (KDVN), 38 km away, was scanning. The volume nearest the first event began at 03:19 UTC.
4 thunderstorm wind. Local standard time, as filed.
Winds estimated to be 70 mph blew down a large tree across a road on the north side of Osco, IL. Time estimated.
Winds were estimated to be gusting between 65 and 70 mph in Osco, IL.|
Winds estimated to be 60 mph blew down some tree limbs in Prophetstown, IL. Time estimated.
Winds estimated to be 70 mph blew down two trees in Prophetstown, IL. Time estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2007Every state in 2007This day in weather historyWarnings in Illinois, August 2007
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: 56821, 56822, 56824, 56825.