A stationary frontal boundary draped across north-central Illinois triggered scattered severe thunderstorms during the morning of July 11th. Some of the storms produced wind gusts of 60-70 mph and localized damage, particularly across portions of Logan, DeWitt, Champaign, and Vermilion counties.
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 stationary frontal boundary draped across north-central Illinois triggered scattered severe thunderstorms during the morning of July 11th. Some of the storms produced wind gusts of 60-70 mph and localized damage, particularly across portions of Logan, DeWitt, Champaign, and Vermilion counties.
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 Jul 11, 5:00 AM CST, 3 hours 10 minutes earlier.
Area Forecast Discussion National Weather Service Lincoln IL 600 AM CDT Tue Jul 11 2017 .SHORT TERM...(Today and tonight) ISSUED AT 330 AM CDT Tue Jul 11 2017 Summer heat wave will continue during mid week along with daily chances of showers and thunderstorms through Thu night (and isolated chances in southeast IL still on Friday). MCS that brought some severe thunderstorms and heavy rains to parts of central IL during late Monday afternoon and Monday evening, has pushed se into central and se parts of IN/OH. Another MCS was over western IA and eastern NE. SW winds were keeping mild temps in the 70s across CWA early this morning with muggy dewpoints in the upper 60s and lower 70s. A series of short waves will ride over top of subtropical mid/upper level high pressure ridge that stretches from the 4 corners eastward into the TN river valley. Very unstable airmass lingers over area through Thu along with some wind shear and will support periodic chances of showers and thunderstorms along with threat of more severe storms. Chances of convection appear greatest this afternoon especially over central and ne CWA then a possible lull in activity after sunset tonight into Wed morning. SPC day1 outlook has marginal risk of severe storms across area this afternoon and early evening. Highs in the upper 80s and lower 90s this afternoon with heat indices peaking in the upper 90s to lower 100s this afternoon similar to what we had yesterday and warmest in sw CWA. Cap in place on Wed, but more convection possible late Wed afternoon and especially Wed night as more short waves approach with highest pops from I-74 north where SPC day2 has slight risk of severe storms and marginal risk rest of CWA except southern 6 counties. Highs in the low to mid 90s Wed with dewpoints in the 70s giving heat indices Wed afternoon peaking from 100-105F and will may need a heat advisory then especially sw CWA. A cold front to shift southward into central IL on Thu and maintains chances of showers and thunderstorms and SPC day3 has marginal risk of severe storms Thu afternoon/evening. Another very warm and humid day Thu with highs in mid 80s nw of IL river and lower 90s in southeast IL. Heat indices will peak in upper 90s and lower 100s from I-55 se Thu afternoon, warmest se of I-70. .LONG TERM...(Wednesday through Monday) ISSUED AT 330 AM CDT Tue Jul 11 2017 The upper level ridge is forecast to retrograde back into the Rockies late this week allowing upper level driving into the Great Lakes and Ohio river valley on Friday and into this weekend. This will push the frontal boundary south of CWA on Friday as it moves into the TN river valley. Have isolated convection south of Charleston/Mattoon on Friday, otherwise a dry forecast this weekend through early next week. Weak 1020 mb surface high pressure settles into the area on Saturday and over the Ohio river valley on Sunday. Seasonable highs in the mid to upper 80s Friday through Sunday then climbing into the upper 80s to around 90F on Monday. Dewpoints generally in the 60s Friday through Monday, except lower 70s on Friday in southeast IL. Extended forecast models showing the 595 dm 500 mb upper level ridge starting to shift back east into the central plains and eventually toward from Monday through Wednesday, and this to bring warmer and more humid wx back to the area. && .AVIATION...(For the 12Z TAFS through 12Z Wednesday morning) Issued at 555 AM CDT Tue Jul 11 2017 A cluster of thunderstorms ne of CMI at dawn will mainly affect Vermilion county/Danville area early this morning. A band of isolated showers was over central IL along and north of I-72 while thunderstorms were over southeast IA and tracking ESE. The HRRR model tracks this convection to near the IL river by PIA by 14Z/9 am and develops/spreads quickly ESE to near BMI, DEC and CMI around 15Z. Most of this convection should shift north of central IL later today and through tonight. SW winds of 7-12 kts today to become south 5-10 kts tonight by sunset. && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...07 LONG TERM...07 AVIATION...07
Hazardous Weather Outlook National Weather Service Lincoln IL 656 AM CDT Tue Jul 11 2017 ILZ027>031-037-038-043>046-121200- Champaign-De Witt-Knox-Marshall-McLean-Peoria-Piatt-Stark- Tazewell-Vermilion-Woodford- 656 AM CDT Tue Jul 11 2017 This Hazardous Weather Outlook is for portions of central Illinois, east central Illinois and west central Illinois. .DAY ONE...TODAY AND TONIGHT... There is a marginal risk of severe thunderstorms with large hail and damaging winds today and this evening, along with frequent lightning and heavy rains. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... Thunderstorm chances will continue Wednesday through Thursday evening. There is a slight risk of severe storms Wednesday north of I-74, with a marginal risk elsewhere on Wednesday. A marginal risk of severe weather will be present on Thursday as well, with hail and damaging winds the primary hazards. Frequent lightning and heavy rains will be possible. High temperatures and humidity from this afternoon through Thursday will result in afternoon heat indices from 95 to 103 degrees, with Wednesday being the hottest day. These temperatures will be very dependent on the evolution of several storm systems that may alter cloud cover in the afternoon hours. Use caution when planning any outdoor activities through mid week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. ILZ036-040>042-047>057-061>063-121200- Cass-Christian-Clark-Coles-Cumberland-Douglas-Edgar-Fulton-Logan- Macon-Mason-Menard-Morgan-Moultrie-Sangamon-Schuyler-Scott-Shelby- 656 AM CDT Tue Jul 11 2017 This Hazardous Weather Outlook is for portions of central Illinois, east central Illinois and west central Illinois. .DAY ONE...TODAY AND TONIGHT... There is a marginal risk of severe thunderstorms with large hail and damaging winds today and this evening, along with frequent lightning and heavy rains. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... Thunderstorm chances will continue Wednesday through Thursday evening. There is a marginal risk of severe storms both days, with hail and gusty winds the primary hazards. Frequent lightning and heavy rains may also occur. High temperatures and humidity from this afternoon through Thursday will result in afternoon heat indices from 95 to 105 degrees, with Wednesday being the hottest day. These temperatures will be very dependent on the evolution of several storm systems that may alter cloud cover in the afternoon hours. Use caution when planning any outdoor activities through mid week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. ILZ066>068-071>073-121200- Clay-Crawford-Effingham-Jasper-Lawrence-Richland- 656 AM CDT Tue Jul 11 2017 This Hazardous Weather Outlook is for portions of southeast Illinois. .DAY ONE...TODAY AND TONIGHT... There is a marginal risk of severe thunderstorms with large hail and damaging winds this afternoon and this evening, along with frequent lightning and heavy rains. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... Thunderstorm chances will continue Wednesday through Thursday evening. There is a marginal risk of severe storms on Wednesday, with hail and gusty winds the primary hazards. Frequent lightning and heavy rains may also occur. High temperatures and humidity from this afternoon through Thursday will result in afternoon heat indices from 98 to 105 degrees, with Wednesday being the hottest day. These temperatures will be very dependent on the evolution of several storm systems that may alter cloud cover in the afternoon hours. Use caution when planning any outdoor activities through mid week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated through tonight. Shimon
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
802 AM CDT TUE JUL 11 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN MORTON 40.61N 89.47W
07/11/2017 M3.22 INCH TAZEWELL IL CO-OP OBSERVER
0600 AM HEAVY RAIN 5 SSW AVON 40.60N 90.47W
07/11/2017 M5.15 INCH MCDONOUGH IL CO-OP OBSERVER
&&
JRPPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
813 AM CDT TUE JUL 11 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY RAIN 5 NW PEORIA 40.80N 89.68W
07/11/2017 M1.35 INCH PEORIA IL CO-OP OBSERVER
&&
JRPSpecial Weather Statement
National Weather Service Lincoln IL
816 AM CDT TUE JUL 11 2017
ILZ028>031-037-038-041>043-048-051-053-111400-
Logan-Tazewell-Marshall-Peoria-Sangamon-Mason-Macon-Woodford-Stark-
Menard-McLean-De Witt-
816 AM CDT TUE JUL 11 2017
...SIGNIFICANT WEATHER ADVISORY FOR MARSHALL...MENARD...LOGAN...
WOODFORD...NORTHEASTERN SANGAMON...SOUTHEASTERN STARK...WESTERN DE
WITT...TAZEWELL...SOUTHWESTERN MCLEAN...EASTERN MASON...EASTERN
PEORIA AND NORTHWESTERN MACON COUNTIES UNTIL 900 AM CDT...
At 815 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Camp Grove to near Kilbourne. Movement was
east at 65 mph.
Half inch hail and wind gusts up to 50 mph will be possible with
these storms.
Locations impacted include...
Peoria, Pekin, Lincoln, Eureka, Mason City, Lacon, East Peoria,
Morton, Washington, Bartonville, Chillicothe, Creve Coeur, West
Peoria, Sherman, Metamora, Germantown Hills, Marquette Heights,
Henry, Petersburg and Tremont.
This includes the following highways...
Interstate 155 between mile markers 0 and 31.
Interstate 39 between mile markers 26 and 40.
Interstate 474 between mile markers 0 and 14.
Interstate 55 between mile markers 105 and 151.
Interstate 74 between mile markers 83 and 124.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4115 8933 4112 8933 4110 8935 4110 8905
4093 8905 4092 8904 3990 8913 3990 8997
4115 8964
TIME...MOT...LOC 1315Z 278DEG 56KT 4101 8963 4016 8991
HJSPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
828 AM CDT TUE JUL 11 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0830 PM HEAVY RAIN 4 SSE PEKIN 40.51N 89.60W
07/10/2017 M1.79 INCH TAZEWELL IL COCORAHS
RAIN FELL IN 2.5 HOURS
0835 PM TSTM WND GST 2 E LINCOLN 40.15N 89.33W
07/10/2017 M59.00 MPH LOGAN IL AWOS
0845 PM HEAVY RAIN 1 N MORTON 40.63N 89.47W
07/10/2017 M1.60 INCH TAZEWELL IL BROADCAST MEDIA
RAIN FELL IN 30 MINUTES. DELAYED REPORT, RELAYED BY
BROADCAST MEDIA.
0855 PM HEAVY RAIN 2 E LINCOLN 40.15N 89.33W
07/10/2017 M1.62 INCH LOGAN IL AWOS
RAIN FELL IN ONE HOUR
0900 PM HEAVY RAIN 2 ENE PEKIN 40.58N 89.59W
07/10/2017 M1.83 INCH TAZEWELL IL MESONET
RAIN FELL IN 2.5 HOURS
1000 PM TSTM WND DMG SHERMAN 39.89N 89.61W
07/10/2017 SANGAMON IL TRAINED SPOTTER
4-5 INCH LIMBS OFF TREES IN FLAGGLAND SUBDIVISION...ONE
TREE UPROOTED IN GEORGETOWNE SUBDIVISION ON WILLIAMSBURG
STREET.
1004 PM TSTM WND DMG SPRINGFIELD 39.78N 89.64W
07/10/2017 SANGAMON IL AMATEUR RADIO
POWER LINES DOWN
1025 PM TSTM WND DMG ROCHESTER 39.75N 89.54W
07/10/2017 SANGAMON IL AMATEUR RADIO
4 INCH DIAMETER TREE LIMB BLOWN DOWN
1030 PM TSTM WND DMG STONINGTON 39.64N 89.19W
07/10/2017 CHRISTIAN IL PUBLIC
LARGE TREE BRANCH BLOWN DOWN ON A GARAGE. NUMEROUS TREE
LIMBS BLOWN DOWN IN YARD.
1040 PM TSTM WND DMG ROSAMOND 39.38N 89.16W
07/10/2017 CHRISTIAN IL PUBLIC
TREES BLOWN DOWN ON SEVERAL PROPERTIES IN ROSAMOND. AN
AWNING BLOWN DOWN.
1051 PM HEAVY RAIN CAPITAL AIRPORT 39.84N 89.68W
07/10/2017 M1.24 INCH SANGAMON IL ASOS
1 HOUR RAINFALL AT CAPITAL AIRPORT IN SPRINGFIELD
1155 PM HEAVY RAIN 1 E LINCOLN 40.15N 89.35W
07/10/2017 M1.41 INCH LOGAN IL OFFICIAL NWS OBS
MEASURED 1.41 INCHES OF RAIN SINCE 8 PM AT NWS ON EAST
SIDE OF LINCOLN
0330 AM HEAVY RAIN 1 NW LINCOLN 40.16N 89.38W
07/11/2017 M1.86 INCH LOGAN IL NWS EMPLOYEE
24 HOUR STORM TOTAL
0600 AM HEAVY RAIN SHERMAN 39.89N 89.61W
07/11/2017 M1.42 INCH SANGAMON IL CO-OP OBSERVER
0600 AM HEAVY RAIN 5 SSW AVON 40.60N 90.47W
07/11/2017 M5.15 INCH MCDONOUGH IL CO-OP OBSERVER
0600 AM HEAVY RAIN HAVANA 40.30N 90.06W
07/11/2017 M2.29 INCH MASON IL CO-OP OBSERVER
0700 AM HEAVY RAIN AVON 40.66N 90.44W
07/11/2017 M5.37 INCH FULTON IL CO-OP OBSERVER
0700 AM HEAVY RAIN BUFFALO 39.85N 89.41W
07/11/2017 M1.51 INCH SANGAMON IL CO-OP OBSERVER
0700 AM HEAVY RAIN MORTON 40.61N 89.47W
07/11/2017 M3.22 INCH TAZEWELL IL CO-OP OBSERVER
0800 AM HEAVY RAIN 5 NW PEORIA 40.80N 89.68W
07/11/2017 M1.35 INCH PEORIA IL CO-OP OBSERVER
&&
JRPPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
840 AM CDT TUE JUL 11 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN 1 N MACKINAW 40.55N 89.36W
07/11/2017 M1.04 INCH TAZEWELL IL CO-OP OBSERVER
&&
JRPPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
905 AM CDT TUE JUL 11 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN MORTON 40.61N 89.47W
07/11/2017 M3.01 INCH TAZEWELL IL NWS EMPLOYEE
&&
JRPThe Lincoln radar (KILX), 3 km away, was scanning. The volume nearest the first event began at 14:11 UTC.
13 thunderstorm wind. Local standard time, as filed.
Numerous trees and power lines were blown down across Lincoln.
Several trees and power lines were blown down across Clinton.
Multiple trees and power lines were blown down across Tolono.
Twenty five power poles were blown down near county roads 1200E and 900N about 4 miles west of Philo.
Several power poles were snapped.
Numerous trees were snapped or uprooted.
Tree damage and power outages were reported in Sidney.
Power poles were blown down on buildings.
Tree damage was reported northwest of Homer.
Trees were blown down on Route 1 blocking the road into Georgetown.
A tree was blown onto a car on the 600 block of South Paris Street.
Trees were blown down onto Route 1 and 14th Street in Tilton.
Several trees were snapped or uprooted across Danville.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2017Every state in 2017This day in weather historyWarnings in Illinois, July 2017
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: 708404, 708419, 708405, 708408, 708409, 708410, 708411, 708412, 708413, 708414, 708415, 708416, 708417.