A low pressure system developing over the plains and an associated front extending from Eastern Wyoming to Northern Missouri brought warmer air and thunderstorms to the region during the morning of June 24. One storm cell surpassed severe limits producing damaging winds.
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 developing over the plains and an associated front extending from Eastern Wyoming to Northern Missouri brought warmer air and thunderstorms to the region during the morning of June 24. One storm cell surpassed severe limits producing damaging winds. Copious amounts of small hail also accompanied the storm.
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 Jun 24, 5:57 AM CST, 3 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 657 AM CDT SUN JUN 24 2012 .UPDATE... SHIFTING AXIS OF ELEVATED THETAE CONVERGENCE ON A 35KT SW JET AT 850 MB HAS REFOCUSED THUNDERSTORMS INTO A LINE FROM ABOUT MASON CITY TO THE QUAD CITIES AS OF 12Z. THIS LINE WAS VERY SLOWLY PROGRESSING EAST TO SOUTHEAST AND WILL AFFECT MUCH OF THE FORECAST AREA NORTH OF I-80 AND WEST OF THE MS RIVER OVER THE NEXT COUPLE HOURS. WITH THE DIURNAL WEAKENING LOW LEVEL JET...WILL ANTICIPATE THE COMPLEX TO WEAKEN CONSIDERABLY AS IT MIGRATES EASTWARD INTO IL THIS MORNING. RADAR HAS INDICATED SOME BRIEF INTENSE CELLS IN THIS LINE CAPABLE OF PRODUCING PEA SIZE TO POSSIBLY DIME SIZE HAIL. THE HIGH PW AIRMASS IS ALSO LIKELY RESULTING IN LOCALIZED HEAVY RAINFALL RATES. RADAR RAINFALL ESTIMATES HAVE INDICATED SWATHS OF .75 TO OVER 1 INCH AMOUNTS ALONG AND EAST OF A WEST LIBERTY THROUGH CEDAR RAPIDS TO INDEPENDENCE AXIS. && .AVIATION... SCATTERED SHOWERS AND THUNDERSTORMS THAT DEVELOPED OVERNIGHT WILL IMPACT THE MLI AND DBQ TERMINALS BEFORE 15Z WITH HEAVY DOWNPOURS AND BRIEF MVFR CONDITIONS. OTHERWISE...VFR CONDITIONS ARE EXPECTED TODAY WITH SCATTERED SHOWERS AND THUNDERSTORMS REDEVELOPING AS A COLD FRONT DROPS SOUTH INTO THE AREA IN THE AFTERNOON INTO EARLY EVENING. THIS IS HANDLED WITH PROB30 GROUPS FOR NOW. LIGHT SOUTH TO SOUTHWEST WINDS WILL VEER TO NORTHEAST AND THEN EAST OVERNIGHT FOLLOWING THE FROPA AND INCREASE TO 10 TO 15 KTS. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && SHEETS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 415 AM CDT SUN JUN 24 2012 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-250915- 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- 415 AM CDT SUN JUN 24 2012 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 LOW POTENTIAL FOR SEVERE STORMS THIS AFTERNOON AND EVENING... MAINLY ALONG AND SOUTH OF A LINE FROM STERLING ILLINOIS TO WILLIAMSBURG IOWA...WHERE THE STORM PREDICTION CENTER HAS OUTLINED A SLIGHT RISK. THE MAIN SEVERE WEATHER THREATS WILL BE DAMAGING WINDS AND LARGE HAIL. VERY WARM AND SOMEWHAT HUMID AIR WILL RESULT IN HEAT INDEX READINGS APPROACHING 100 THIS AFTERNOON AND EARLY EVENING ALONG AND SOUTH OF A LINE FROM FAIRFIELD TO MACOMB. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HEAT INDEX READINGS BETWEEN 95 AND 100 DEGREES WILL BE POSSIBLE THURSDAY AND FRIDAY THIS WEEK. OTHERWISE...A LOW CHANCE FOR THUNDERSTORMS IS EXPECTED THURSDAY NIGHT THROUGH SATURDAY. IT IS TOO EARLY TO DETERMINE COVERAGE OF RAINFALL...OR SEVERE WEATHER THREATS FROM THESE POTENTIAL STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE TODAY. SHEETS/ERVIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
751 AM CDT SUN JUN 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0624 AM HEAVY RAIN ANAMOSA 42.11N 91.28W
06/24/2012 M1.29 INCH JONES IA CO-OP OBSERVER
24HR RAINFALL TOTAL
&&
TEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
910 AM CDT SUN JUN 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0909 AM HAIL SE MOUNT UNION 41.06N 91.39W
06/24/2012 M0.75 INCH HENRY IA TRAINED SPOTTER
PEA SIZE ALSO
&&
TEOSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
917 AM CDT SUN JUN 24 2012
IAZ077-078-087>089-098-099-ILZ016-024>026-034-035-MOZ010-241515-
CLARK-DES
MOINES-HANCOCK-HENDERSON-HENRY-JEFFERSON-LEE-LOUISA-MCDONOUGH-MERCER-
VAN BUREN-WARREN-WASHINGTON-
917 AM CDT SUN JUN 24 2012
...THUNDERSTORMS WITH SMALL HAIL AND HEAVY RAINFALL...
AT 911 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MOUNT UNION...OR 13 MILES EAST OF MOUNT
PLEASANT...MOVING SOUTHEAST AT 30 MPH. OTHER STORMS WILL AFFECT
SURROUNDING AREAS THROUGH 10 AM...AND ARE LIKELY TO PRODUCE SMALL
HAIL AND FREQUENT LIGHTNING ALONG WITH A HEAVY DOWNPOUR.
* THE STRONGEST THUNDERSTORM WILL BE NEAR...
WEST BURLINGTON AROUND 930 AM CDT...
GULF PORT AND BURLINGTON AROUND 935 AM CDT...
CARMAN AROUND 945 AM CDT...
TERRE HAUTE AND STRONGHURST AROUND 950 AM CDT...
LA HARPE AROUND 1000 AM CDT...
BLANDINSVILLE AROUND 1005 AM CDT...
HAIL UP TO PENNY SIZE...WINDS GREATER THAN 35 MPH...FREQUENT CLOUD
TO GROUND LIGHTNING AND A BRIEF PERIOD OF HEAVY RAIN...ARE EXPECTED
WITH THIS STORM.
IF YOU HEAR THUNDER...MOVE IMMEDIATELY TO A STURDY BUILDING OR CAR
UNTIL THE STORM HAS PASSED.
LAT...LON 4019 9150 4024 9151 4026 9186 4117 9173
4116 9130 4118 9035 4115 9035 4114 9043
4028 9044 4028 9090 4019 9091
TIME...MOT...LOC 1413Z 320DEG 37KT 4100 9129PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
950 AM CDT SUN JUN 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0942 AM HEAVY RAIN 4 SSW CUTSHAW BRIDGE ST 42.48N 92.07W
06/24/2012 M1.25 INCH BUCHANAN IA TRAINED SPOTTER
24 HOUR RAIN TOTAL. SMALL HAIL AROUND 7AM
&&
TEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
951 AM CDT SUN JUN 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0944 AM HEAVY RAIN SSE TIPTON 41.77N 91.13W
06/24/2012 M2.80 INCH CEDAR IA TRAINED SPOTTER
OVERNIGHT TOTAL
&&
TEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1005 AM CDT SUN JUN 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0951 AM HAIL BUSHNELL 40.55N 90.50W
06/24/2012 M0.25 INCH MCDONOUGH IL TRAINED SPOTTER
VIA E-SPOTTER
&&
TEOThe Quad Cities radar (KDVN), 148 km away, was scanning. The volume nearest the first event began at 15:07 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
Wind gusts estimated to be 75 mph blew down several trees and six power poles were broken with power lines down in the Montebello Township area northeast of Hamilton, IL at 1007 am CDT June 24.
Wind gusts estimated to be 75 mph blew down a large tree about 3 miles northeast of Hamilton, IL at 1008 am CDT June 24.
Penny sized hail shredded leaves off of trees about 2 miles east of Tioga, IL at 1025 am CDT June 24. The hail covered about 50 to 70 percent of the ground.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2012Every state in 2012This day in weather historyWarnings in Illinois, June 2012
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: 386683, 386684, 386685.