9:15AM WEDNESDAY. AUG. 11
More Danger Headed Our Way
While the main severe weather threat today will come this evening, storms are expected to move through much of the area this morning (Wednesday, Aug. 11).
Some of these storms will feature winds strong enough to down a few tree limbs and possibly some hail.
A line of thunderstorms is expected to develop northwest of the area late this afternoon and track across northern Illinois and northwest Indiana this evening. Damaging winds capable of uprooting trees will be possible with this line.
Locally large hail and a brief embedded tornado cannot be ruled out.
Very warm and humid conditions will be in place again today, with heat index values of 105 to 110 degrees. Strenuous outdoor activity should be limited and include frequent breaks to stay hydrated.
Check on those who may have a more difficult time with the heat and humidity including pets.
Storms Won’t Quit
Warm and very humid conditions will continue through Thursday, before somewhat cooler and less humid air arrives into the weekend.
Periodic thunderstorm chances continue through Friday. Severe thunderstorms are possible again very late this afternoon and evening.
Understand NWS Warnings
Tuesday Storm Overview
Fast Facts: Thunderstorms erupted over eastern Iowa during the mid afternoon on Tuesday, Aug. 10. in an extremely unstable air mass over the region.
Clusters of thunderstorms continued to track and develop across northern Illinois into northwest Indiana through the evening hours, producing areas of notable wind damage.
Storm Damage Tuesday
0712 PM TSTM WND DMG WEST DUNDEE 42.10N 88.28W 08/10/2021 KANE IL PUBLIC DELAYED REPORT RELAYED VIA SOCIAL MEDIA. MULTIPLE LARGE TREES AND TREE LIMBS BLOWN DOWN THROUGHOUT TOWN. TIME ESTIMATED BY RADAR. 0711 PM TSTM WND DMG SLEEPY HOLLOW 42.09N 88.32W 08/10/2021 KANE IL PUBLIC DELAYED REPORT. RELAYED VIA SOCIAL MEDIA. LARGE TREE LIMBS BLOWN DOWN AND LARGE TREE BLOWN DOWN OR UPROOTED NEAR BEAU BRUMMEL DR AND SLEEPY HOLLOW RD. 0711 PM TSTM WND DMG ELGIN 42.04N 88.29W 08/10/2021 KANE IL PUBLIC NUMEROUS REPORTS OF TREE BRANCHES DOWNED IN ELGIN AND VICINITY. RELAYED VIA MPING. TIME ESTIMATED BY RADAR.
8PM TUESDAY, AUG. 10
EF1 Tornado Touched Down in Burlington
The National Weather Service Chicago has confirmed a preliminary total of seven tornadoes that occurred with Monday’s storms.
The preliminary ratings for these tornadoes are as follows:
- North of Esmond: EF-0
- South of Kirkland: EF-U*
- McHenry: EF-1
- South of Esmond: EF-0
- Burlington: EF-1
- Paw Paw: EF-U*
- Sycamore to Virgil: EF-1
*A rating of EF-U designates that a tornado was rated as “EF-Unknown” because it did not produce any damage to qualified damage indicators from which a wind speed can be estimated from.
Note: The Sycamore to Virgil EF-1 tornado track may still be split into two or three separate tornado tracks as we are still piecing together the details of where, when,
4:30PM TUESDAY, AUG. 10
Severe Thunderstorms Expected This Afternoon, Evening
After being hit by tornadoes on Monday, Kane County could be in for another big storm late this afternoon or this evening.
A Severe Thunderstorm Watch is in effect until 10 p.m., according to the National Weather Service Chicago.
Thunderstorms are developing across eastern Iowa and will track across the area this evening. Each storm will be capable of producing winds strong enough to uproot trees, damaging hail, brief tornadoes, and torrential downpours.
The primary thunderstorm threat will be between 6 p.m. and 11 p.m.
Dangerous heat will continue this afternoon with heat related illness probable after 30 minutes of being in direct sunlight. Additional thunderstorms may develop after midnight and produce torrential downpours with a threat for flash flooding.
At this point, it appears such renewed thunderstorms will be south of Interstate 80.
Rainfall Totals
NATIONAL WEATHER SERVICE CHICAGO IL 1000 AM CDT TUE AUG 10 2021 COCORAHS PRECIPITATION REPORTS THESE REPORTS ARE CONSIDERED SUPPLEMENTAL AND UNOFFICIAL VALUES ARE FOR THE PREVIOUS 24 HOURS ENDING AROUND 7 AM LOCAL TIME :COCORAHS PRECIPITATION REPORTS IN ILLINOIS : SNOW SNOW WATER : PCPN FALL DEPTH EQUIV IL-MCH-33 : WOODSTOCK 3.8 SW * : 5.11 / MM / MM / MM IL-MCH-87 : MARENGO 0.7 NNW * : 4.71 / MM / MM / MM IL-MCH-52 : WOODSTOCK 0.8 SSW * : 3.96 / MM / MM / MM IL-WN-48 : ROCKFORD 3.8 NNW * : 3.89 / MM / MM / MM IL-MCH-13 : BULL VALLEY 2.5 WNW * : 3.67 / 0.0 / 0.0 / 0.00 IL-MCH-77 : WONDER LAKE 1.4 NE * : 3.32 / MM / MM / MM IL-WN-43 : ROCKFORD 3.8 S * : 3.05 / MM / MM / MM IL-DK-27 : KINGSTON 2.3 WNW * : 3.00 / MM / MM / MM IL-KN-86 : ELGIN 7.5 WSW * : 2.98 / MM / MM / MM IL-MCH-96 : HUNTLEY 1.6 SW * : 2.84 / MM / MM / MM IL-WN-44 : WINNEBAGO 5.4 SE * : 2.79 / MM / MM / MM IL-MCH-80 : HUNTLEY 0.1 SSE * : 2.64 / 0.0 / 0.0 / MM IL-MCH-83 : CRYSTAL LAKE 1.0 WSW * : 2.56 / MM / MM / MM IL-WN-41 : SOUTH BELOIT 1.5 ESE * : 2.54 / MM / MM / MM IL-WN-51 : MACHESNEY PARK 1.5 SSW * : 2.42 / MM / MM / MM IL-BN-14 : CAPRON 0.1 N * : 2.37 / MM / MM / MM IL-MCH-94 : MCHENRY 2.4 E * : 2.36 / MM / MM / MM IL-WN-26 : ROCKFORD 1.5 ENE * : 2.36 / MM / MM / MM IL-MCH-43 : ALGONQUIN 0.7 N * : 2.35 / 0.0 / 0.0 / 0.00 IL-WN-45 : MACHESNEY PARK 0.9 W * : 2.33 / MM / MM / MM IL-MCH-102: ALGONQUIN 3.4 W * : 2.25 / MM / MM / MM IL-LK-100 : LONG LAKE 0.4 S * : 2.23 / MM / MM / MM IL-KN-67 : ST. CHARLES 6.0 NW * : 2.14 / 0.0 / 0.0 / MM IL-MCH-34 : PISTAKEE HIGHLANDS 0.4 SW* : 2.12 / MM / MM / MM IL-KN-98 : GILBERTS 0.5 N * : 2.10 / MM / MM / MM IL-BN-19 : BELVIDERE 5.0 NNW * : 2.10 / MM / MM / MM IL-LK-114 : ROUND LAKE HEIGHTS 0.5 NE* : 2.02 / MM / MM / MM IL-MCH-103: HARVARD 4.4 NNE * : 2.01 / MM / MM / MM IL-KN-95 : ELGIN 2.5 W * : 1.94 / 0.0 / MM / MM IL-CK-317 : HOFFMAN ESTATES 0.6 ESE * : 1.93 / MM / MM / MM IL-LK-81 : LAKE VILLA 2.3 WSW * : 1.93 / MM / MM / MM IL-WN-40 : ROCKFORD 4.5 WSW * : 1.92 / MM / MM / MM IL-MCH-95 : CARY 0.5 SSW * : 1.92 / MM / MM / MM IL-MCH-35 : LAKEMOOR 1.9 NW * : 1.84 / MM / MM / MM IL-CK-150 : ARLINGTON HEIGHTS 1.2 S * : 1.77 / MM / MM / MM IL-DP-124 : BARTLETT 1.4 SE * : 1.77 / MM / MM / MM IL-LK-9 : LAKE VILLA 1.1 SSW * : 1.77 / MM / MM / MM IL-DP-100 : BARTLETT 1.1 SE * : 1.76 / MM / MM / MM IL-LK-121 : LIBERTYVILLE 0.4 ESE * : 1.75 / MM / MM / MM IL-WN-50 : ROCKTON 3.1 SW * : 1.69 / 0.0 / 0.0 / MM IL-LK-54 : MUNDELEIN 0.5 NNE * : 1.67 / MM / MM / MM IL-CK-75 : ELK GROVE VILLAGE 2.2 WSW* : 1.60 / MM / MM / MM IL-LK-112 : LINDENHURST 1.0 ENE * : 1.60 / MM / MM / MM IL-CK-106 : HOFFMAN ESTATES 4.6 W * : 1.59 / MM / MM / MM IL-KN-9 : ELGIN 1.0 S * : 1.59 / 0.0 / 0.0 / MM IL-LK-42 : GURNEE 1.6 W * : 1.58 / MM / MM / MM IL-LK-27 : WINTHROP HARBOR 0.7 SSW * : 1.58 / MM / MM / MM IL-BN-20 : CALEDONIA 1.4 W * : 1.57 / MM / MM / MM IL-LK-87 : LAKE ZURICH 1.3 N * : 1.57 / MM / MM / MM IL-KN-118 : SLEEPY HOLLOW 0.7 W * : 1.56 / MM / MM / MM IL-LK-78 : LIBERTYVILLE 1.8 ESE * : 1.55 / MM / MM / MM IL-CK-278 : HOFFMAN ESTATES 1.6 SE * : 1.51 / MM / MM / MM IL-CK-346 : PALATINE 1.2 NW * : 1.50 / MM / MM / MM IL-CK-294 : PALATINE 1.4 NNE * : 1.49 / MM / MM / MM IL-CK-192 : PARK RIDGE 0.7 WNW * : 1.42 / MM / MM / MM IL-CK-334 : EVANSTON 0.6 S * : 1.39 / MM / MM / MM IL-CK-180 : PARK RIDGE 0.5 SSW * : 1.38 / MM / MM / MM IL-CK-336 : EVANSTON 0.8 ESE * : 1.36 / 0.0 / 0.0 / 0.00 IL-LK-19 : WAUKEGAN 2.2 N * : 1.36 / MM / MM / MM IL-LK-16 : BUFFALO GROVE 1.5 N * : 1.32 / MM / MM / MM IL-CK-367 : MOUNT PROSPECT 0.2 NNE * : 1.32 / MM / MM / MM IL-CK-63 : ELK GROVE VILLAGE 0.6 ESE* : 1.29 / MM / MM / MM IL-CK-321 : EVANSTON 0.9 S * : 1.27 / MM / MM / MM IL-CK-121 : PALATINE 1.3 E * : 1.26 / 0.0 / 0.0 / MM IL-DP-155 : MEDINAH 1.0 SSW * : 1.25 / 0.0 / 0.0 / 0.00 IL-CK-331 : NORTHFIELD 0.3 S * : 1.19 / MM / MM / MM IL-CK-193 : WINNETKA 0.8 ESE * : 1.18 / MM / MM / MM IL-LK-103 : BUFFALO GROVE 1.3 ESE * : 1.14 / MM / MM / MM IL-LK-23 : WINTHROP HARBOR 0.2 SSE * : 1.12 / MM / MM / MM IL-CK-326 : MORTON GROVE 1.2 WNW * : 1.05 / MM / MM / MM IL-CK-131 : SCHAUMBURG 2.0 E * : 1.05 / MM / MM / MM IL-CK-325 : MOUNT PROSPECT 1.3 SSE * : 0.99 / MM / MM / MM IL-LK-118 : HIGHLAND PARK 2.1 WNW * : 0.97 / MM / MM / MM IL-LK-39 : RIVERWOODS 0.4 ENE * : 0.91 / MM / MM / MM IL-CK-53 : GLENCOE 0.1 NW * : 0.88 / MM / MM / MM IL-CK-285 : HARWOOD HEIGHTS 0.4 NNE * : 0.84 / MM / MM / MM IL-LK-15 : BANNOCKBURN 0.5 ESE * : 0.81 / MM / MM / MM IL-CK-94 : LINCOLNWOOD 1.8 E * : 0.78 / MM / MM / MM IL-KN-130 : ST. CHARLES 0.2 NNW * : 0.77 / MM / MM / MM IL-KD-119 : YORKVILLE 2.3 NNE * : 0.70 / MM / MM / MM IL-DP-117 : ELMHURST 2.0 SE * : 0.64 / MM / MM / MM IL-CK-214 : ROGERS PARK 1.5 SW * : 0.64 / MM / MM / MM IL-DP-42 : CAROL STREAM 0.3 SSE * : 0.64 / MM / MM / MM IL-DP-40 : LOMBARD 1.0 NNW * : 0.63 / MM / MM / MM IL-DP-150 : BLOOMINGDALE 1.2 ESE * : 0.63 / MM / MM / MM IL-CK-345 : FRANKLIN PARK 0.5 SSE * : 0.58 / MM / MM / MM IL-KN-96 : ELBURN 0.3 NW * : 0.58 / MM / MM / MM IL-DP-173 : LOMBARD 1.2 N * : 0.56 / MM / MM / MM IL-KN-121 : GENEVA 1.3 NW * : 0.56 / 0.0 / 0.0 / 0.00 IL-DP-132 : WHEATON 2.0 NNE * : 0.53 / 0.0 / 0.0 / 0.00 IL-KN-134 : MAPLE PARK 3.9 S * : 0.52 / MM / MM / MM IL-DP-163 : LOMBARD 1.2 E * : 0.52 / MM / MM / MM IL-DK-36 : DE KALB 3.5 WSW * : 0.47 / MM / MM / MM IL-WL-73 : WILMINGTON 2.6 SE * : 0.44 / MM / MM / MM IL-KN-119 : MAPLE PARK 3.1 SE * : 0.43 / MM / MM / MM IL-LS-49 : NORTH UTICA 6.3 N * : 0.38 / MM / MM / MM IL-KN-133 : GENEVA 0.9 E * : 0.37 / MM / MM / MM IL-KD-106 : YORKVILLE 2.8 NE * : 0.37 / MM / MM / MM IL-LS-57 : MENDOTA 0.4 ENE * : 0.35 / MM / MM / MM IL-DP-38 : ELMHURST 0.4 SW * : 0.33 / MM / MM / MM IL-CK-74 : OAK PARK 1.3 NNE * : 0.32 / 0.0 / MM / MM IL-DP-27 : NAPERVILLE 2.1 ESE * : 0.32 / MM / MM / MM IL-KN-78 : GENEVA 1.3 SSW * : 0.32 / 0.0 / 0.0 / 0.00 IL-CK-361 : GLENVIEW 0.7 SE * : 0.31 / MM / MM / MM IL-DP-172 : WEST CHICAGO 3.0 SSE * : 0.31 / MM / MM / MM IL-CK-61 : OAK PARK 1.0 SW * : 0.30 / MM / MM / MM IL-KN-128 : BATAVIA 3.4 WSW * : 0.30 / MM / MM / MM IL-CK-323 : CHICAGO 6.8 NW * : 0.29 / MM / MM / MM IL-DP-176 : WINFIELD 0.6 SSW * : 0.29 / MM / MM / MM IL-KN-127 : GENEVA 0.6 SSE * : 0.28 / MM / MM / MM IL-KN-104 : GENEVA 3.9 WSW * : 0.28 / 0.0 / 0.0 / 0.00 IL-DP-30 : LISLE 0.5 WSW * : 0.27 / MM / MM / MM IL-DP-175 : NAPERVILLE 0.9 ENE * : 0.27 / MM / MM / MM IL-KN-22 : GENEVA 1.0 SSW * : 0.27 / MM / MM / MM IL-WL-42 : MOKENA 1.3 W * : 0.26 / MM / MM / MM IL-WL-164 : WILMINGTON 0.9 ENE * : 0.26 / MM / MM / MM IL-DP-101 : AURORA 3.8 SE * : 0.26 / 0.0 / 0.0 / 0.00 IL-KN-23 : BATAVIA 1.5 WNW * : 0.25 / MM / MM / MM IL-KD-5 : MONTGOMERY 0.8 SSE * : 0.24 / MM / MM / MM IL-KD-109 : YORKVILLE 1.0 N * : 0.24 / MM / MM / MM IL-WL-79 : PEOTONE 0.5 SE * : 0.24 / MM / MM / MM IL-WL-97 : NEW LENOX 3.3 E * : 0.23 / 0.0 / 0.0 / 0.00 IL-DP-16 : AURORA 3.6 SE * : 0.23 / MM / MM / MM
10AM TUESDAY UPDATE
Weather updates are still coming from the National Weather Service Chicago after the series of tornadoes that blasted through Kane County late afternoon and early evening on Monday, Aug. 9, 2021.
Fast Facts: Two rounds of thunderstorms produced significant rainfall across portions of Northern Illinois. The thunderstorms were supercells that produced numerous tornadoes, some of which caused noteworthy tree and structural damage in portions of Ogle, DeKalb and Kane counties.
As you can see by the NWS graphic above, the northern part of Kane County received up to 3 inches of rain while most of the southern portion of the county had an inch or less.
This article will be updated as it comes in from the National Weather Service.
Storm Reports
0658 PM TORNADO 1 WSW CAMPTON HILLS 41.93N 88.42W 08/09/2021 KANE IL TRAINED SPOTTER MULTIPLE REPORTS OF A BRIEF TORNADO NEAR CAMPTON HILLS. 0644 PM TORNADO 1 ESE LILY LAKE 41.95N 88.46W 08/09/2021 KANE IL AMATEUR RADIO MULTIPLE REPORTS OF A WEAK TORNADO NEAR LILY LAKE. 0631 PM TORNADO 1 S VIRGIL 41.93N 88.54W 08/09/2021 KANE IL AMATEUR RADIO RAIN-WRAPPED TORNADO REPORTED NEAR BEITH ROAD AND MEREDITH ROAD. 0629 PM FUNNEL CLOUD 3 NE MAPLE PARK 41.94N 88.56W 08/09/2021 KANE IL AMATEUR RADIO TORNADO ON THE GROUND NORTHEAST OF MAPLE PARK.
0526 PM TORNADO 2 WSW BURLINGTON 42.05N 88.58W 08/09/2021 KANE IL LAW ENFORCEMENT CORRECTS AND UPDATES PREVIOUS TSTM WND DMG REPORT FROM 2 WSW BURLINGTON. KANE COUNTY SHERIFFS OFFICE REPORTS DAMAGE TO A STRUCTURE ALONG PLANK ROAD NEAR EAGLE ROAD. CONFIRMED TORNADO WITH THIS DAMAGE GIVEN TORNADO DEBRIS SIGNATURE ON KLOT FROM ABOUT 5:24 PM UNTIL 5:33 PM. TIME ESTIMATED BY RADAR.
More Severe Weather Possible Today
Heat Advisory Tuesday
A Heat Advisory remains in effect from noon to 7 p.m. today (Tuesday, Aug. 10, 2021).
WHAT: Heat index values 102 to 109 expected, highest south and west of the Chicago urban corridor.
WHERE: North central Illinois, northeast Illinois, and northwest Indiana.
WHEN: From noon to 7 p.m.
IMPACTS: Hot temperatures and high humidity may cause heat illnesses to occur.
PRECAUTIONARY/PREPAREDNESS ACTIONS:
- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
- Young children and pets should never be left unattended in vehicles under any circumstances.
- Take extra precautions if you work or spend time outside.
- When possible reschedule strenuous activities to early morning or evening.
- Know the signs and symptoms of heat exhaustion and heat stroke.
- Wear lightweight and loose fitting clothing when possible.
- To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments.
- Anyone overcome by heat should be moved to a cool and shaded location.
- Heat stroke is an emergency! Call 9-1-1.
7:30 PM MONDAY UPDATE
As many as three tornadoes might have touched down today in Kane County, according to media reports.
One is confirmed near Maple Park.
Another tornado was spotted near Lily Lake.
Kane County is under a tornado warning until 7:30 p.m. A Tornado Watch is in effect until 10 p.m.
“At 617 PM CDT, a confirmed tornado was located near Sycamore, moving east at 25 mph. To repeat, a tornado is on the ground,” the National Weather Service said. “TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.”
“At 634 PM CDT, a confirmed large and extremely dangerous tornado was located 3 miles northeast of Maple Park, or 7 miles west of Campton Hills, moving east at 25 mph. Weather spotters report the tornado has become rain wrapped and will be difficult if not impossible to see!”
NBC is reporting a confirmed 4.3 tornado in Virgil moving toward Lily Lake as of 6:33 p.m.
Bookmark this article for additional information from the National Weather Service Chicago.
NWS Chicago on Twitter
Large Mutlivortex tornado right before getting rain wrapped near Virgil IL. #ilwx #wxtwitter @CherylScottWX @ReedTimmerAccu @NWSChicago @spann pic.twitter.com/N3xfM9MROH
— Owen Szarley (@OwenWxIllinois) August 9, 2021
Tornado Warning continues for Elburn IL, Lily Lake IL, Virgil IL until 7:00 PM CDT pic.twitter.com/g7LPocTAWZ
— NWS Tornado (@NWStornado) August 9, 2021
LARGE TORNADO IN SYCAMORE! pic.twitter.com/ja7AOc64bJ
— Diego Garcia (@dgarciawx) August 9, 2021
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August 11, 2021 at 09:21PM
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UPDATE: 7 Tornadoes Monday; Storm Damage Tuesday; More Danger Heading Our Way - kanecountyconnects.com
"danger" - Google News
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