Isolated storms developed across the area. One storm caused some wind damage in Quincy.
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 LSX wrote it up.
Isolated storms developed across the area. One storm caused some wind damage in Quincy.
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 St. Louis, MO wrote its last area forecast discussion before the first event at Jun 11, 6:04 PM CST, 3 hours 46 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 704 PM CDT Thu Jun 11 2015 .SHORT TERM: (Through Late Tonight) Issued at 352 PM CDT Thu Jun 11 2015 Remnant showers from morning convection were moving eastward through portions of northeast and central MO. Stronger convection has recently developed over southeast Nebraska, northwest MO, and southwest IA. This latter activity was associated with a shortwave trough moving through the northern Plains, and a surface low over northeast KS. Most of the convection tonight is expected across northern MO and west central IL as the surface low moves northeastward through northern MO and southern IA. A southwesterly low level jet is also forecast across this region southeast of the 850 mb low moving eastward through IA. As the convection continues to develop it may form into an MCS over north central and northeast MO capable of strong wind gusts during the late evening into the overnight hours as well as heavy rainfall. GKS .LONG TERM: (Friday through Next Thursday) Issued at 352 PM CDT Thu Jun 11 2015 Weakening convection is expected along and just ahead of a cold front which will be dropping southeastward through our area southwest of the surface low moving eastward through northern IL. Convection may redevelop Friday afternoon along this front, although upper level support may be lacking. This front should make it down to central MO and southern IL Friday night. At least slightly cooler temperatures are expected behind this front in northeast MO on Friday and across northeast MO and west central IL Friday night. This front should shift back northward as a warm front on Saturday as a weak surface ridge over the Great Lakes region moves further east while an upper level ridge centered over the southeast US tries to build northwestward towards our region. The best potential for convection will likely occur over northeast MO Saturday night and Sunday as southwest flow shortwaves move northeastward through the Plains up the backside of the upper level ridge. Another cold front is forecast to drop slowly southeastward through our forecast area Monday and Monday night which will be the focus for more convection. The GFS is a little more progressive with this front than the ECMWF and tries to shift most of the convection south of our forecast area by Tuesday. GKS && .AVIATION: (For the 00z TAFs through 00z Friday Evening) Issued at 704 PM CDT Thu Jun 11 2015 Thunderstorms in the vicinity of KUIN will move away from the terminal shortly. Thunderstorms along a front over northwest Missouri will move east toward KUIN and will likely affect the terminal around 06Z. This same front will bring scattered thunderstorms into central Missouri that may affect KUIN after 09Z and the St. Louis metro TAF sites by midday tomorrow. Otherwise...expect mainly VFR conditions outside thunderstorms. Specifics for KSTL: Expect mainly dry and VFR conditions through about 15Z. Then scattered showers and thunderstorms will move into the area as a cold front moves across eastern Missouri. Will maintain just VCTS as coverage is just expected to be scattered at this point. Britt && .LSX WATCHES/WARNINGS/ADVISORIES: MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 406 PM CDT THU JUN 11 2015 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-121130- GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL- CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX MO- LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO- AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO- LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO- MADISON MO-REYNOLDS MO- 406 PM CDT THU JUN 11 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TONIGHT THUNDERSTORMS ARE LIKELY ACROSS NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS WITH A CHANCE OF THUNDERSTORMS ELSEWHERE. A FEW STORMS MAY BE SEVERE ACROSS NORTHEAST MO AND WEST CENTRAL ILLINOIS WITH THE PRIMARY THREAT BEING DAMAGING WINDS. LOCALLY HEAVY RAINFALL MAY ALSO OCCUR WITH THESE STORMS ACROSS NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF THUNDERSTORMS ACROSS MOST OF THE AREA FROM FRIDAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ACROSS PARTS OF NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS TONIGHT. GKS
The St Louis radar (KLSX), 152 km away, was scanning. The volume nearest the first event began at 03:51 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds blew down a couple of trees and tree limbs on the north side of Quincy. One large tree on 6th Street between Spruce and Sycamore Streets fell onto a telephone pole knocking it down as well.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2015Every state in 2015This day in weather historyWarnings in Illinois, June 2015
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: 589912.