A large complex of severe thunderstorms developed along a stationary frontal boundary across eastern Iowa during the afternoon of June 30th, then tracked eastward along the boundary across north-central Illinois during the evening. These storms produced damaging wind gusts of around 60 mph and locally heavy rainfall along and north of a Canton to Minonk line.
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 ILX wrote it up.
A large complex of severe thunderstorms developed along a stationary frontal boundary across eastern Iowa during the afternoon of June 30th, then tracked eastward along the boundary across north-central Illinois during the evening. These storms produced damaging wind gusts of around 60 mph and locally heavy rainfall along and north of a Canton to Minonk line. Additional strong thunderstorms developed further south in Missouri and pushed into the area during the evening, producing widely scattered wind damage along and west of I-55. Very high rainfall rates led to flash flooding across parts of Marshall and Stark County. The flooding continued into the morning hours of July 1st.
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 Lincoln, IL wrote its last area forecast discussion before the first event at Jun 30, 2:39 PM CST, 1 hour 52 minutes earlier.
Area Forecast Discussion National Weather Service Lincoln IL 339 PM CDT Mon Jun 30 2014 .DISCUSSION... ISSUED 338 PM CDT Mon Jun 30 2014 Not many changes overall to the expected weather scenario for the next week. Discussion will be abbreviated due to ongoing severe weather preparedness & operations. SHORT TERM...Tonight through Thursday: Lingering uncertainty exists with respect to the evolution of the storm complex heading east across Iowa. Most of forecast area remains in a Moderate Risk for severe weather through tonight, although the main threat should be over this evening. Current bow echo, surging east into northwest Illinois, is expected to stay north of the forecast area as flow backs southwest ahead of an advancing upper trof. However, additional development remains possible, and is suggested by many mesoscale models, along the boundary extending southwest from the main bow in a strongly sheared and highly unstable environment. Very heavy rain remains a threat with any storms the impact the area tonight, with precipitable water values in excess of 1.5 inches, though rapid storm movement should mitigate the flooding threat to some degree. Expect storms to taper off overnight with the loss of diurnal instability and as the surface cold front sweeps through the area. The bulk of the remainder of the short term period should be quiet and cooler than normal. Northwest upper level flow will predominate, with high pressure at the surface more often than not. Still signs of a spoke of energy moving through the mean upper trof around Wednesday, which may bring a chance of rainfall to the area. However, most of the models are less bullish than they have been. LONG TERM...Friday through Monday: Temperatures will begin to moderate heading into the weekend as low level flow turns southerly on the back side of the surface high. The turning flow will also help richer moisture to return to the area. A northwest flow wave is still expected by late in the weekend, and this will result in our next organized risk of showers/storms. Bak && .AVIATION... ISSUED 1255 PM CDT Mon Jun 30 2014 Early morning convection has moved out of the area and dissipated, leaving behind partly sunny skies. Latest obs generally show MVFR ceilings and forecast soundings support this for the balance of the afternoon. Main aviation challenge will be approaching severe convection later today into tonight. Still quite a bit of uncertainty concerning exact track and timing: however, storms are already organizing across western Iowa. High-res model guidance has a poor handle on the situation, with most solutions appearing too slow. Based on latest satellite/radar trends, think a line of strong storms will arrive at KPIA between 23z and 03z...then push eastward to KCMI between 03z and 07z. Have included a TEMPO group featuring wind gusts to 45kt at the western terminals accordingly, but have tempered the winds down to 35kt further east at KDEC and KCMI as storms should weaken overnight. Once convection clears the area, skies will clear and winds will become westerly late tonight into Tuesday morning. Barnes && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 325 PM CDT MON JUN 30 2014 ILZ027>031-036-037-011100- FULTON-KNOX-MARSHALL-PEORIA-STARK-TAZEWELL-WOODFORD- 325 PM CDT MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS. .DAY ONE...TONIGHT A LINE OF SEVERE THUNDERSTORMS WILL TRACK EASTWARD ACROSS NORTH-CENTRAL ILLINOIS DURING THE LATE AFTERNOON AND EVENING. WHILE THE MOST INTENSE STORMS MAY TEND TO STAY FURTHER NORTH ALONG THE I-80 CORRIDOR...DAMAGING WIND GUSTS WILL LIKELY IMPACT AREAS ALONG AND NORTH OF A CANTON TO MINONK LINE. IN ADDITION...FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL WILL OCCUR WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED BETWEEN 4 PM AND 8 PM. ILZ038-040>057-061-011100- CASS-CHAMPAIGN-CHRISTIAN-COLES-DE WITT-DOUGLAS-EDGAR-LOGAN-MACON- MASON-MCLEAN-MENARD-MORGAN-MOULTRIE-PIATT-SANGAMON-SCHUYLER-SCOTT- SHELBY-VERMILION- 325 PM CDT MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS AND EAST CENTRAL ILLINOIS. .DAY ONE...TONIGHT A LINE OF SEVERE THUNDERSTORMS WILL TRACK EASTWARD ACROSS NORTH-CENTRAL ILLINOIS DURING THE LATE AFTERNOON AND EVENING. WHILE THE MOST INTENSE STORMS MAY TEND TO STAY FURTHER NORTH ALONG THE I-80 CORRIDOR...ADDITIONAL STORMS MAY DEVELOP FURTHER SOUTHWEST ACROSS SOUTHERN IOWA AND NORTHERN MISSOURI THAT MAY IMPACT CENTRAL ILLINOIS THIS EVENING. ANY STORMS THAT OCCUR WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS...FREQUENT LIGHTNING...AND LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY FOR INTERESTS ALONG THE ILLINOIS RIVER...MINOR FLOODING WILL CONTINUE FROM HAVANA DOWNSTREAM THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED BETWEEN 6 PM AND MIDNIGHT. ILZ062-063-066>068-071>073-011100- CLARK-CLAY-CRAWFORD-CUMBERLAND-EFFINGHAM-JASPER-LAWRENCE-RICHLAND- 325 PM CDT MON JUN 30 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ILLINOIS AND SOUTHEAST ILLINOIS. .DAY ONE...TONIGHT A LINE OF SEVERE THUNDERSTORMS WILL TRACK EASTWARD ACROSS NORTH-CENTRAL ILLINOIS DURING THE LATE AFTERNOON AND EVENING. WHILE THE MOST INTENSE STORMS MAY TEND TO STAY FURTHER NORTH ALONG THE I-80 CORRIDOR...ADDITIONAL STORMS MAY DEVELOP FURTHER SOUTHWEST ACROSS SOUTHERN IOWA AND NORTHERN MISSOURI THAT MAY IMPACT SOUTHEAST ILLINOIS LATE THIS EVENING INTO THE OVERNIGHT HOURS. ANY STORMS THAT OCCUR WILL BE CAPABLE OF PRODUCING GUSTY WINDS...FREQUENT LIGHTNING...AND LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED BETWEEN 8 PM AND 2 AM. BARNES
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1152 AM CDT MON JUN 30 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0745 AM HEAVY RAIN 3 NE BLOOMINGTON 40.51N 88.93W
06/30/2014 M1.45 INCH MCLEAN IL NWS EMPLOYEE
RAIN FELL FROM 530-745 AM.
&&
OUSLEYThe Quad Cities radar (KDVN), 87 km away, was scanning. The volume nearest the first event began at 22:31 UTC.
12 thunderstorm wind, 2 flash flood, 2 flood. Local standard time, as filed.
Two trees were blown down onto Route 93. Considerable crop damage was also noted in the area.
Two large trees were blown down.
A tree was blown down across Highway 18. Considerable crop damage was also noted in the area.
Persistent thunderstorms produced several periods of heavy rainfall. Total accumulations of up to 3.00 of rain were common in northern and western Marshall County. Big Sandy Creek, about 2 miles southeast of Henry overflowed its banks. Numerous rural roads in northwest Marshall County were impassable.
Persistent thunderstorms produced several periods of heavy rainfall. Total accumulations of up to 4.00 of rain were common in most of Stark County. Rainfall rates in Toulon were nearly 4.00 per hour between 2000 and 2015 LST. Many rural roads were closed across Stark County, as were parts of Illinois Routes 17, 40 and 93.
Four 8 to 10-inch diameter trees were blown down.
A 5 to 6-inch diameter tree branch was blown down.
Power lines were blown down in Brimfield.
Numerous tree limbs were blown down along US 150 in Kickapoo.
A tree was snapped in half and numerous large branches were blown down.
Several trees were blown down.
Several tree tops were broken off and tree limbs were blown down. A large cottonwood tree was blown down along Pokeberry Road. Damage occurred to tents at the fairgrounds northeast of Rushville.
Tree limbs were blown down onto Highway 78 near Matanzas Beach.
A semi was blown over at I-55 mile marker 126 in Lincoln.
Persistent thunderstorms produced several periods of heavy rainfall. Total accumulations of up to 3.00 of rain were common in northern and western Marshall County. Big Sandy Creek, about 2 miles southeast of Henry overflowed its banks. Numerous rural roads in northwest Marshall County were impassable. Additional rainfall late in the evening of June 30th caused creeks to stay out of the their banks and roads remained closed through the early morning hours of July 1st.
Persistent thunderstorms produced several periods of heavy rainfall. Total accumulations of up to 4.00 of rain were common in most of Stark County. Rainfall rates in Toulon were nearly 4.00 per hour between 2000 and 2015 LST. Many rural roads were closed across Stark County, as were parts of Illinois Routes 17, 40 and 93. Additional rainfall late in the evening of June 30th caused roads to remain closed through the early morning hours of July 1st.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2014Every state in 2014This day in weather historyWarnings in Illinois, June 2014
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: 527315, 527316, 527320, 531409, 531413, 527321, 527322, 527333, 527334, 527324, 527332, 527330, 527331, 527323, 531417, 531419.