|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, 1 hour 1 minute 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
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
310 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0305 AM TSTM WND GST KEOTA 41.37N 91.96W
08/05/2008 E70 MPH KEOKUK IA TRAINED SPOTTER
SPOTTER ESTIMATED 60 TO 70 MPH WIND GUSTS.
&&
MIKEZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
334 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0305 AM TSTM WND GST WASHINGTON 41.30N 91.69W
08/05/2008 M49 MPH WASHINGTON IA AWOS
0254 AM TSTM WND GST FAIRFIELD 41.01N 91.97W
08/05/2008 E46 MPH JEFFERSON IA AWOS
&&
BILLNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
339 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0338 AM TSTM WND GST YARMOUTH 41.03N 91.32W
08/05/2008 E55 MPH DES MOINES IA TRAINED SPOTTER
SPOTTER ALSO REPORTED HEAVY RAIN.
&&
MIKEZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
340 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0337 AM HAIL 1 W MIDDLETOWN 40.83N 91.28W
08/05/2008 M0.75 INCH DES MOINES IA TRAINED SPOTTER
&&
MIKEZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
342 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0338 AM TSTM WND GST BURLINGTON 40.81N 91.12W
08/05/2008 E65 MPH DES MOINES IA TRAINED SPOTTER
&&
MIKEZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
351 AM CDT TUE AUG 05 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0630 AM TSTM WND DMG 1 E FREEPORT 42.29N 89.62W
08/04/2008 STEPHENSON IL TRAINED SPOTTER
SEVERAL TREES UP TO 1 FOOT IN DIAMETER.POWER LINES DOWN.
DELAYED REPORT.
&&
BILLNThe Quad Cities radar (KDVN), 78 km away, was scanning. The volume nearest the first event began at 08:57 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
Wind gusts estimated to be 60 mph blew down some tree branches in Monmouth, IL at 357 am August 5.
Wind gusts estimated to be 70 mph blew down a two and a half foot diameter tree across a road 5 miles east of Roseville, IL at 410 am August 5.
Penny-sized hail fell in Galva, IL at 426 am August 5. Wind speeds were estimated to be between 35 and 40 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2008Every state in 2008This day in weather historyWarnings in Illinois, 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: 130374, 130375, 130376.