|Heavy rainfall, damaging winds, and large hail were associated with some of the stronger storms.
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 low pressure system tracking along a cold front draped across the region sparked the development of some showers and thunderstorms over eastern Iowa and Northwest Illinois during the early morning hours of August 5.|Heavy rainfall, damaging winds, and large hail were associated with some of the stronger storms.
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 5, 1:56 AM CST, 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 256 AM CDT TUE AUG 5 2008 .SYNOPSIS... COLD FRONT EXTENDS FROM NORTHWEST IL TO EASTERN IA TO NORTHWEST MO WILL MOVE THROUGH THE CWA TODAY. THEN NORTHWEST FLOW ALOFT DOMINATES FOR THE REMAINDER OF THE WEEK FOR AN EXTENDED PERIOD OF QUIET WEATHER. ECMWF HINTS AT STRONG WARM FRONT RETURNING ABOUT SUNDAY WITH DECENT WARM AIR ADVECTION THUNDERSTORMS DEVELOPING. && .SHORT TERM...TODAY AND TONIGHT... COLD FRONT EXTENDS FROM NORTHWEST IL TO EASTERN IA TO NORTHWEST MO AND WILL CONTINUE SLIDING TO THE SOUTHEAST TODAY. THUNDERSTORMS HAVE ERUPTED LAST COUPLE OF HOURS IN OUR IA CWA AHEAD OF FRONT FROM I-80 SOUTHWARD. CAP ERODING AS COOLER MID LEVEL TEMPERATURES SPREAD SOUTH INTO THE AREA...WITH LOW LEVEL JET POINTED INTO SOUTHERN IA. THUNDERSTORMS FEEDING ON VERY UNSTABLE AIR WITH MSAS SHOWING LI OF -9 IN SOUTHEAST IA AND DEWPOINT OF 78 AT BRL. ALREADY GETTING SEVERE WEATHER REPORTS AND WILL HAVE SEVERE MENTIONED IN GRIDS FOR THIS MORNING. POTENTIAL EXISTS FOR SIGNIFICANT WIND DAMAGE AS LARGER BOW ECHO BEGINNING TO TAKE SHAPE. WILL ALSO HAVE LIKELY POPS ESPECIALLY SOUTH OF I-80. MAIN ACTION SHOULD SHIFT OFF THE EAST OF THE CWA LATER THIS MORNING AND WILL CARRY ONLY SMALL CHANCE IN OUR FAR SOUTHERN CWA THIS AFTERNOON. WILL GO WITH HIGHS THIS AFTERNOON IN THE 80S WITH GRADUALLY LOWERING HUMIDITY VALUES. THEN COOLER AND DRIER AIR FEEDING INTO THE CWA OVERNIGHT BEHIND FRONT. .LONG TERM...WEDNESDAY THROUGH NEXT MONDAY... WEDNESDAY THROUGH SATURDAY...NORTHWEST FLOW ALOFT DOMINATES THIS PERIOD WITH BELOW NORMAL TEMPERATURES AND COMFORTABLE HUMIDITIES. RATHER LARGE CANADIAN HIGH PRESSURE BUILDS INTO THE REGION SO QUIET WEATHER EXPECTED. 850 MB TEMPERATURES ARE PROGGED BY THE ECMWF MODEL TO BE 12 TO 14C ACROSS THE CWA WHICH SUPPORTS RATHER PLEASANT TEMPERATURES FOR AUGUST. SUNDAY...ECMWF INDICATES STRONG WARM FRONT LIFTING TOWARDS THE MIDWEST WITH SIGNALS SUPPORTING AN MCS DEVELOPING IN THE DVN CWA. WILL PASS CONCERNS TO THE NEXT SHIFT TO EVALUATE FOR ADDING POPS ON SUNDAY. && .AVIATION... THUNDERSTORMS THIS MORNING SHOULD AFFECT KMLI/KBRL SITES AS COLD FRONT MOVES INTO THE REGION. DRIER AIR FILTERING INTO THE AREA FROM THE NORTH THIS AFTERNOON SHOULD ENSURE VFR CONDITIONS...WHICH WILL CONTINUE THROUGH TUESDAY NIGHT. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && HAASE
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1025 PM CDT MON AUG 4 2008 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-050900- 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- 1025 PM CDT MON AUG 4 2008 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...TONIGHT SCATTERED THUNDERSTORMS WILL BE FOUND TONIGHT MAINLY ALONG AND SOUTH OF INTERSTATE 80. THERE IS A SLIGHT RISK THAT A FEW STORMS COULD BECOME SEVERE. THE MAIN THREAT WILL BE LARGE HAIL UP TO QUARTER SIZE TO POSSIBLY GOLF BALL SIZE... WITH DAMAGING WINDS A SECONDARY THREAT. ASIDE FROM THE STORMS...AREAS OF FOG WILL DEVELOP OVERNIGHT. THE FOG MAY BE LOCALLY DENSE REDUCING VISIBILITIES TO LESS THAN ONE QUARTER MILE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SATURDAY TUESDAY AND TUESDAY NIGHT...THUNDERSTORMS WILL CONTINUE TO OCCUR ALONG AND AHEAD OF THE SLOW MOVING COOL FRONT. ADDITIONAL STRONG TO SEVERE STORMS WITH DAMAGING WINDS AND LARGE HAIL MAY ALSO OCCUR IN THE STRONGEST STORMS IN THE AFTERNOON AND EVENING HOURS SOUTH OF I- 80. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT MAINLY ALONG AND SOUTH OF INTERSTATE 80.
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
940 PM CDT MON AUG 04 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0455 PM TSTM WND GST MONTICELLO 42.24N 91.19W
08/04/2008 E60.00 MPH JONES IA LAW ENFORCEMENT
0455 PM HAIL HOPKINTON 42.34N 91.25W
08/04/2008 E0.88 INCH DELAWARE IA EMERGENCY MNGR
DIME TO QUARTER SIZE HAIL
0500 PM HAIL CASCADE 42.30N 91.01W
08/04/2008 E0.25 INCH DUBUQUE IA EMERGENCY MNGR
0505 PM TSTM WND GST MONTICELLO 42.24N 91.19W
08/04/2008 M53.00 MPH JONES IA AWOS
0525 PM TSTM WND GST 1 N MONMOUTH 42.09N 90.88W
08/04/2008 M45.00 MPH JACKSON IA TRAINED SPOTTER
0530 PM TSTM WND DMG 3 SE GALENA 42.39N 90.39W
08/04/2008 JO DAVIESS IL CO-OP OBSERVER
SIDING BLOWN OFF WEST SIDE OF HOUSE DUE TO STRONG WINDS.
1.26 INCHES OF RAIN MEASURED AS OF 625 PM.
0536 PM HAIL BELLEVUE 42.26N 90.43W
08/04/2008 E0.25 INCH JACKSON IA TRAINED SPOTTER
0542 PM HEAVY RAIN 5 E GALENA 42.42N 90.33W
08/04/2008 M0.50 INCH JO DAVIESS IL TRAINED SPOTTER
RAIN FELL IN PAST 15 MINUTES
0542 PM TSTM WND DMG 5 E GALENA 42.42N 90.33W
08/04/2008 JO DAVIESS IL TRAINED SPOTTER
BRANCHES AND SMALL TREES DOWNED BY STRONG WIND GUSTS
0542 PM TSTM WND GST 5 E GALENA 42.42N 90.33W
08/04/2008 E60.00 MPH JO DAVIESS IL TRAINED SPOTTER
0550 PM HAIL CASCADE 42.30N 91.01W
08/04/2008 E0.88 INCH DUBUQUE IA EMERGENCY MNGR
TIME ESTIMATED
0552 PM TSTM WND GST 4 ESE MAQUOKETA 42.05N 90.60W
08/04/2008 E60.00 MPH JACKSON IA TRAINED SPOTTER
0555 PM TSTM WND GST MILES 42.05N 90.32W
08/04/2008 E70.00 MPH JACKSON IA TRAINED SPOTTER
0600 PM TSTM WND DMG MOUNT CARROLL 42.10N 89.98W
08/04/2008 CARROLL IL EMERGENCY MNGR
TIME IS APPROXIMATE...EIGHT TREES DOWN AT FAIR
GROUNDS...SOME FELL ON CARS. NUMEROUS TREES AND POWER
LINES DOWN ACROSS THE ENTIRE COUNTY...MANY COMMUNITIES
WITHOUT POWER.
0607 PM TSTM WND GST STOCKTON 42.32N 90.00W
08/04/2008 M52.00 MPH JO DAVIESS IL CO-OP OBSERVER
0608 PM TSTM WND GST 4 E FULTON 41.87N 90.08W
08/04/2008 M40.00 MPH WHITESIDE IL AMATEUR RADIO
0608 PM TSTM WND GST CLINTON 41.84N 90.23W
08/04/2008 E60.00 MPH CLINTON IA LAW ENFORCEMENT
WIND BLOWING VEHICLE ON HWY 67 NORTH SIDE OF TOWN
0620 PM TSTM WND GST 2 E MILLEDGEVILLE 41.96N 89.74W
08/04/2008 E50.00 MPH CARROLL IL TRAINED SPOTTER
TREES DOWN
0620 PM TSTM WND GST MILLEDGEVILLE 41.96N 89.78W
08/04/2008 E60.00 MPH CARROLL IL EMERGENCY MNGR
WINDS ESTIMATED 40 TO 60 MPH...TREE BRANCHES AND POWER
OUT.
0620 PM TSTM WND DMG LENA 42.38N 89.83W
08/04/2008 STEPHENSON IL BROADCAST MEDIA
1 TO 2 INCH DIAMETER LIMBS DOWN
0625 PM TSTM WND GST 5 SW FREEPORT 42.24N 89.70W
08/04/2008 M65.00 MPH STEPHENSON IL EMERGENCY MNGR
0628 PM TSTM WND DMG STOCKTON 42.35N 90.01W
08/04/2008 JO DAVIESS IL BROADCAST MEDIA
TIME OF OCCURANCE UNSPECIFIED...5 INCH DIAMETER LIMBS
DOWN...METAL POLE WIND SOCK BENT IN HALF...METAL TABLE
BLOWN OFF DECK.
0628 PM TSTM WND DMG 3 N FREEPORT 42.33N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
POWER POLES DOWN...VERY HEAVY RAIN
0628 PM TSTM WND DMG PEARL CITY 42.27N 89.83W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
POWER POLES DOWN
0628 PM TSTM WND GST 2 W FREEPORT 42.29N 89.67W
08/04/2008 M65.00 MPH STEPHENSON IL EMERGENCY MNGR
0630 PM HEAVY RAIN FREEPORT 42.29N 89.63W
08/04/2008 M2.50 INCH STEPHENSON IL EMERGENCY MNGR
AT EM OFFICE.
0630 PM TSTM WND DMG FREEPORT 42.29N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
1/4 MILE NORTH ON EDWARDSVILLE ROAD, 14 INCH TREE LIMBS
DOWN.
0630 PM TSTM WND DMG FREEPORT 42.29N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
3000 BLOCK OF ROCK CITY ROAD, 3 TO 6 INCH TREE LIMBS
BLOWN DOWN.
0630 PM TSTM WND DMG FREEPORT 42.29N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
INTERSECTION OF HIGHWAY 20 AND ROCK CITY ROAD, METAL
STORAGE SHED BLOWN OVER.
0630 PM TSTM WND DMG GERMAN VALLEY 42.22N 89.48W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
8 TO 12 INCH TREE LIMBS DOWN IN MANY AREAS OF TOWN. POWER
OUT TO ENTIRE CITY.
0630 PM TSTM WND DMG FREEPORT 42.29N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
ON ROCK CITY ROAD IN THE 3400 BLOCK, 25 ROWS OF CORN
FLATTENED ON BOTH SIDES OF THE ROAD.
0630 PM TSTM WND GST MILLEDGEVILLE 41.96N 89.78W
08/04/2008 M60.00 MPH CARROLL IL TRAINED SPOTTER
WINDS SUSTAINED AT 40 MPH FOR APPROXIMATELY 10 MINUTES
0633 PM TSTM WND DMG 2 NE STERLING 41.82N 89.66W
08/04/2008 WHITESIDE IL TRAINED SPOTTER
LARGE TREE LIMBS ACROSS THE ROAD 8 INCHES IN DIAMETER.
DAMAGE EXTENDED FROM 2 NE OF STERLING TO 5 NE OF STERLING
AND EXTENDED ACROSS COUNTY LINE FROM WHITESIDE COUNTY TO
LEE COUNTY.
0635 PM HEAVY RAIN STOCKTON 42.35N 90.01W
08/04/2008 M1.25 INCH JO DAVIESS IL CO-OP OBSERVER
RAINFALL IN 25 MINUTES
0635 PM TSTM WND DMG STOCKTON 42.35N 90.01W
08/04/2008 JO DAVIESS IL CO-OP OBSERVER
TREE ON HOUSE
0645 PM TSTM WND DMG 1 W FREEPORT 42.29N 89.65W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
2 16 INCH DIAMETER TREES BLOWN DOWN.
0650 PM TSTM WND DMG GERMAN VALLEY 42.22N 89.48W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
24 INCH DIAMETER TREE BLOWN DOWN.
0650 PM TSTM WND DMG FREEPORT 42.29N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
BETWEEN 645 AND 650 PM. ON FAIRVIEW ROAD TREE BLOWN DOWN
ON HOUSE.
0650 PM TSTM WND DMG GERMAN VALLEY 42.22N 89.48W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
60 FOOT HAM RADIO TOWER BLOWN DOWN.
0650 PM TSTM WND DMG SE MILLEDGEVILLE 41.96N 89.78W
08/04/2008 CARROLL IL EMERGENCY MNGR
LARGE BRANCHES AND POWER LINES DOWN
0653 PM TSTM WND DMG FREEPORT 42.29N 89.63W
08/04/2008 STEPHENSON IL EMERGENCY MNGR
SW PART OF TOWN BUILDINGS DAMAGED BY STRONG
WIND...MULTIPLE POWER OUTAGES ACROSS THE COUNTY
0700 PM HEAVY RAIN MOUNT CARROLL 42.10N 89.98W
08/04/2008 M2.00 INCH CARROLL IL TRAINED SPOTTER
RAIN FELL IN PAST HOUR
0710 PM TSTM WND DMG 4 S ROCK FALLS 41.71N 89.69W
08/04/2008 WHITESIDE IL TRAINED SPOTTER
THOME ROAD BLOCKED BY TREES. TREES 8 TO 12 INCHES IN
DIAMETER. TELEPHONE POLES ALSO DOWN IN SAME AREA.
&&
WEPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1014 PM CDT MON AUG 04 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM TSTM WND GST GOOSE LAKE 41.97N 90.38W
08/04/2008 M76.00 MPH CLINTON IA PUBLIC
RELAYED BY BROADCAST MEDIA. DELAYED REPORT.
0600 PM TSTM WND DMG GOOSE LAKE 41.97N 90.38W
08/04/2008 CLINTON IA PUBLIC
TREES DOWN. RELAYED FROM BROADCAST MEDIA. DELAYED REPORT.
&&
JH2SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 205 AM CDT TUE AUG 5 2008 IAZ076>078-087>089-098-099-MOZ009-010-050930- CLARK MO-DES MOINES IA-HENRY IA-JEFFERSON IA-KEOKUK IA-LEE IA-LOUISA IA- SCOTLAND MO-VAN BUREN IA-WASHINGTON IA- 205 AM CDT TUE AUG 5 2008 ...STRONG THUNDERSTORMS TO SEVERE THUNDERSTORMS DEEVLOPING... A DEVELOPING AREA OF STRONG TO SEVERE THUNDERSTORMS WILL MOVE ACROSS THE REGION THROUGH 430 PM. STRONG TO DAMAGING WINDS OF 45 TO OVER 65 MPH...HEAVY RAIN AND SMALL HAIL WILL ACCOMPANY THESE STORMS. VERY HEAVY RAINFALL RATES OF UP TO TWO INCHES AN HOUR MAY PRODUCE PONDING OF WATER IN LOW LYING LOCATIONS. NICHOLS
SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 207 AM CDT TUE AUG 5 2008 IAZ076>078-087>089-098-099-MOZ009-010-050930- CLARK MO-DES MOINES IA-HENRY IA-JEFFERSON IA-KEOKUK IA-LEE IA-LOUISA IA- SCOTLAND MO-VAN BUREN IA-WASHINGTON IA- 207 AM CDT TUE AUG 5 2008 ...STRONG THUNDERSTORMS TO SEVERE THUNDERSTORMS DEVELOPING... A DEVELOPING AREA OF STRONG TO SEVERE THUNDERSTORMS WILL MOVE ACROSS THE REGION THROUGH 430 PM. STRONG TO DAMAGING WINDS OF 45 TO OVER 65 MPH...HEAVY RAIN AND SMALL HAIL WILL ACCOMPANY THESE STORMS. VERY HEAVY RAINFALL RATES OF UP TO TWO INCHES AN HOUR MAY PRODUCE PONDING OF WATER IN LOW LYING LOCATIONS. NICHOLS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
240 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0236 AM TSTM WND GST SIGOURNEY 41.33N 92.21W
08/05/2008 E50 MPH KEOKUK IA LAW ENFORCEMENT
0224 AM TSTM WND GST SIGOURNEY 41.33N 92.21W
08/05/2008 M54 MPH KEOKUK IA DEPT OF HIGHWAYS
MEASURED BY RWIS.
&&
BILLNThe Quad Cities radar (KDVN), 114 km away, was scanning. The volume nearest the first event began at 08:01 UTC.
4 thunderstorm wind, 2 hail. Local standard time, as filed.
Wind gusts estimated to be 60 mph blew down some tree branches in Brighton, IA around 300 am August 5. A power outage was also observed.
Wind gusts estimated to be 60 to 70 mph were observed in Keota, IA at 305 am August 5.
Wind gusts estimated to be 70 mph blew down seven large trees up to 3 feet in diameter in Keota, IA at 305 am August 5.
Penny-sized hail fell 1 mile west of Middletown, IA at 337 am August 5.
Wind gusts estimated to be 65 mph were observed in Burlington, IA at 338 am August 5.
Penny-sized hail fell in Eldridge, IA at 525 am August 5. The hail covered the ground.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2008Every state in 2008This day in weather historyWarnings in Iowa, August 2008
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: 130368, 130369, 130370, 130371, 130372, 130373.