A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across parts of the Gulf Coast into central/northern Florida early this week. Abnormally hot, potentially record-breaking, temperatures will continue for southern California and stretch north toward the Bay Area and Central Valley this week. Read More >
Overview
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A derecho (long-lived line of thunderstorms with intense winds) produce widespread wind damage across Iowa, northern Illinois, and northern Indiana on August 10, 2020. Many areas had hurricane-force wind speeds in excess of 75 mph, including some 100-115 mph wind gusts in eastern Iowa. Eleven tornadoes also occurred across northern Illinois. Between the winds and the tornadoes, a widespread region of the Midwest saw extensive damage to trees, power lines, buildings, and vehicles. Event summaries from elsewhere along the track can be found at the following links:
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 Radar progression of the derecho between 8 am and 7 pm CDT. Image courtesy NWS Chicago. |
Radar
Progression of derecho across northern Illinois (courtesy NWS Quad Cities):
Storm Reports
Interactive map from the Storm Prediction Center
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
1048 PM CDT MON AUG 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0155 PM TSTM WND GST GALESBURG AIRPORT 40.94N 90.43W
08/10/2020 M51.00 MPH KNOX IL AWOS
0200 PM TSTM WND DMG GALESBURG 40.95N 90.38W
08/10/2020 KNOX IL FIRE DEPT/RESCUE
SEVERAL POWER LINES AND TREE BRANCHES DOWN.
0215 PM TSTM WND DMG ELMIRA 41.18N 89.83W
08/10/2020 STARK IL LAW ENFORCEMENT
SEVERAL POWER LINES AND TREES BLOWN DOWN BETWEEN
210-220PM.
0215 PM TSTM WND DMG BRADFORD 41.18N 89.66W
08/10/2020 STARK IL LAW ENFORCEMENT
SEVERAL POWER LINES AND TREES BLOWN DOWN BETWEEN
210-220PM.
0215 PM TSTM WND DMG WYOMING 41.06N 89.77W
08/10/2020 STARK IL LAW ENFORCEMENT
SEVERAL POWER LINES AND TREES BLOWN DOWN BETWEEN
210-220PM.
0215 PM TSTM WND DMG TOULON 41.09N 89.86W
08/10/2020 STARK IL LAW ENFORCEMENT
SEVERAL POWER LINES AND TREES BLOWN DOWN BETWEEN
210-220PM.
0217 PM TSTM WND GST MARIETTA 40.50N 90.39W
08/10/2020 E55.00 MPH FULTON IL EMERGENCY MNGR
0220 PM TSTM WND DMG 2 SSW ELMWOOD 40.76N 89.99W
08/10/2020 PEORIA IL EMERGENCY MNGR
TEN INCH TREE ACROSS IL-78 NEAR GRAHAM CHAPEL ROAD.
DELAYED REPORT.
0222 PM TSTM WND GST CUBA 40.49N 90.19W
08/10/2020 E55.00 MPH FULTON IL EMERGENCY MNGR
0223 PM TSTM WND GST FARMINGTON 40.70N 90.00W
08/10/2020 E60.00 MPH FULTON IL EMERGENCY MNGR
REPORTED WIND GUSTS OF 50-60 MPH. WIND GUSTS REMAINED AT
THIS LEVEL FOR ABOUT FIVE MINUTES.
0225 PM TSTM WND DMG WNW DUNLAP 40.86N 89.68W
08/10/2020 PEORIA IL EMERGENCY MNGR
TREE WAS ON HOME AT 4TH ST AND BIRCH AND TREE BRANCHES ON
HOME AT 5TH AND BIRCH. DELAYED REPORT.
0228 PM TSTM WND DMG KICKAPOO 40.80N 89.75W
08/10/2020 PEORIA IL BROADCAST MEDIA
LARGE TREE UPROOTED
0229 PM TSTM WND DMG 5 NNW PEORIA 40.81N 89.64W
08/10/2020 PEORIA IL EMERGENCY MNGR
EIGHT INCH TREE DOWN ON HOUSE ON 3300 BLOCK ALTA LANE.
DELAYED REPORT.
0230 PM TSTM WND DMG CANTON 40.56N 90.04W
08/10/2020 FULTON IL PUBLIC
TREE SNAPPED AT BASE
0230 PM TSTM WND GST HANNA CITY 40.69N 89.79W
08/10/2020 M61.00 MPH PEORIA IL EMERGENCY MNGR
0232 PM TSTM WND DMG FARMINGTON 40.57N 90.18W
08/10/2020 FULTON IL EMERGENCY MNGR
TREE FELL ON HOUSE
0235 PM TSTM WND DMG CANTON 40.56N 90.04W
08/10/2020 FULTON IL MESONET
A PORCH ROOF WAS BLOWN OFF ON THE WEST SIDE OF CANTON.
0235 PM TSTM WND DMG 4 NW EAST PEORIA 40.72N 89.60W
08/10/2020 PEORIA IL BROADCAST MEDIA
LARGE BILLBOARD WAS BLOWN OVER NEAR THE INTERSECTION OF
GIFT AVENUE AND SHERIDAN ROAD. STEEL BEAMS SUPPORTING THE
BILLBOARD BENT ABOUT HALFWAY. DELAYED REPORT.
0235 PM TSTM WND DMG 4 NNW EAST PEORIA 40.73N 89.57W
08/10/2020 PEORIA IL EMERGENCY MNGR
EIGHT INCH TREE LIMBS DOWN AT WAR MEMORIAL DRIVE AND
GRAVE AVE. DELAYED REPORT.
0235 PM TSTM WND DMG 3 ENE PEORIA 40.76N 89.56W
08/10/2020 PEORIA IL EMERGENCY MNGR
MULTIPLE TREE LIMBS DOWN AND POWER POLE PARTIALLY DOWN ON
5400 BLOCK OF GALENA ROAD. DELAYED REPORT.
0235 PM TSTM WND DMG PEORIA HEIGHTS 40.75N 89.57W
08/10/2020 PEORIA IL BROADCAST MEDIA
DAMAGE TO A HOME UNDER CONSTRUCTION
0235 PM TSTM WND DMG 1 NW HOPEWELL 40.99N 89.47W
08/10/2020 MARSHALL IL PUBLIC
8 INCH DIAMETER TREE BLOWN DOWN. DELAYED SWOP REPORT.
0237 PM TSTM WND DMG WEST PEORIA 40.70N 89.63W
08/10/2020 PEORIA IL EMERGENCY MNGR
TWO TREES BLOWN DOWN. ONE RESULTED IN A ROAD BEING
BLOCKED.
0237 PM TSTM WND DMG BARTONVILLE 40.64N 89.66W
08/10/2020 PEORIA IL PUBLIC
PICNIC SHELTER DESTROYED. DELAYED REPORT.
0238 PM TSTM WND DMG 1 E GERMANTOWN HILLS 40.77N 89.45W
08/10/2020 WOODFORD IL BROADCAST MEDIA
PART OF THE GERMANTOWN HILLS MIDDLE SCHOOL ROOF WAS BLOWN
OFF. DELAYED REPORT.
0240 PM TSTM WND DMG GERMANTOWN HILLS 40.77N 89.47W
08/10/2020 WOODFORD IL BROADCAST MEDIA
ROOF DAMAGE TO MIDDLE SCHOOL. REPORTED BY WEEK-TV.
0240 PM TSTM WND DMG 1 SW ELMWOOD 40.77N 89.98W
08/10/2020 PEORIA IL EMERGENCY MNGR
TREE DOWN ON GRAHAM CHAPEL ROAD AND IL ROUTE 78.
0240 PM TSTM WND DMG WASHBURN 40.92N 89.29W
08/10/2020 WOODFORD IL EMERGENCY MNGR
MULTIPLE TREES AND POWER LINES DOWN. TREE DOWN ON A
HOUSE, RESIDENTS HAD TO BE HELPED OUT OF HOME.
0240 PM TSTM WND DMG 5 NE EAST PEORIA 40.72N 89.48W
08/10/2020 TAZEWELL IL PUBLIC
TWO TREES BROKEN NEAR THE BASE
0240 PM TSTM WND DMG HENRY 41.11N 89.36W
08/10/2020 MARSHALL IL EMERGENCY MNGR
TREE FELL ON HOUSE ON MAIN ST. MANY 6-8 INCH DIAMETER
BRANCHES DOWN. SCHOOL ST BLOCKED BY DOWNED TREES.
0240 PM TSTM WND DMG METAMORA 40.79N 89.36W
08/10/2020 WOODFORD IL PUBLIC
SEVERAL TREES AND FENCES BLOWN DOWN
0240 PM TSTM WND GST 2 N PEORIA 40.77N 89.61W
08/10/2020 E60.00 MPH PEORIA IL BROADCAST MEDIA
WIND GUSTS UP TO 60MPH LASTED FOR APPROXIMATELY FIVE
MINUTES.
0240 PM TSTM WND DMG LACON 41.02N 89.41W
08/10/2020 MARSHALL IL EMERGENCY MNGR
TREES AND POWER LINES DOWN ON 2ND STREET.
0242 PM TSTM WND GST SPRING BAY 40.82N 89.53W
08/10/2020 E65.00 MPH WOODFORD IL EMERGENCY MNGR
0242 PM TSTM WND DMG CANTON 40.56N 90.04W
08/10/2020 FULTON IL TRAINED SPOTTER
MANY 6 INCH DIAMETER TREE BRANCHES DOWN.
0242 PM TSTM WND DMG SPRING BAY 40.82N 89.53W
08/10/2020 WOODFORD IL EMERGENCY MNGR
ROOF BLOWN OFF A LARGE SHED
0243 PM TSTM WND GST PEORIA INTERNATIONAL AI 40.67N 89.68W
08/10/2020 M59.00 MPH PEORIA IL ASOS
0245 PM TSTM WND DMG HAVANA 40.30N 90.06W
08/10/2020 MASON IL PUBLIC
TREES DOWN
0245 PM TSTM WND DMG HENRY 41.11N 89.36W
08/10/2020 MARSHALL IL EMERGENCY MNGR
TWO LARGE TREES, APPROXIMATELY 10 INCHES IN DIAMETER,
BLOWN DOWN.
0244 PM TSTM WND DMG BELLEVUE 40.69N 89.67W
08/10/2020 PEORIA IL EMERGENCY MNGR
TREE DOWN ON POWERLINES ON HEUERMANN RD. TIME ESTIMATED
BY RADAR.
0245 PM TSTM WND DMG BARTONVILLE 40.64N 89.66W
08/10/2020 PEORIA IL EMERGENCY MNGR
TREE DOWN ON POWERLINES ON FAIRVIEW DRIVE. TIME ESTIMATED
BY RADAR.
0247 PM TSTM WND DMG 1 NW MORTON 40.62N 89.48W
08/10/2020 TAZEWELL IL PUBLIC
POWER POLE SNAPPED NEAR JEFFERSON AND WESTSHORE
0248 PM TSTM WND DMG HAVANA 40.30N 90.06W
08/10/2020 MASON IL EMERGENCY MNGR
LARGE TREE BLOWN DOWN. POWER LINES ALSO DOWN.
0248 PM TSTM WND DMG EUREKA 40.72N 89.28W
08/10/2020 WOODFORD IL EMERGENCY MNGR
POWER LINES BLOWN DOWN, POWER OUT IN TOWN.
0249 PM TSTM WND GST GROVELAND 40.61N 89.53W
08/10/2020 M52.00 MPH TAZEWELL IL EMERGENCY MNGR
0250 PM TSTM WND DMG 1 S MORTON 40.60N 89.47W
08/10/2020 TAZEWELL IL NWS EMPLOYEE
SIX INCH TREE BRANCHES BLOWN DOWN
0250 PM TSTM WND GST 1 S MORTON 40.60N 89.47W
08/10/2020 E65.00 MPH TAZEWELL IL NWS EMPLOYEE
0253 PM TSTM WND DMG 1 SSW PEORIA 40.73N 89.62W
08/10/2020 PEORIA IL STORM CHASER
MULTIPLE LARGE TREE LIMBS, APPROXIMATELY 20 FEET LONG,
DOWN. POWER LINES ALSO DOWN. SOME STREETS BLOCKED BY
DOWNED TREES. NO STRUCTURAL DAMAGE REPORTED.
0256 PM TSTM WND DMG PEKIN 40.57N 89.63W
08/10/2020 TAZEWELL IL EMERGENCY MNGR
LIVE TREE, OVER ONE FOOT IN DIAMETER, BLOWN DOWN.
0258 PM TSTM WND GST MORTON 40.61N 89.47W
08/10/2020 M53.00 MPH TAZEWELL IL PUBLIC
0258 PM TSTM WND GST 1 SSW MORTON 40.60N 89.48W
08/10/2020 M62.00 MPH TAZEWELL IL STORM CHASER
MEASURED WIND GUSTS BETWEEN 55-62MPH OCCURRED BETWEEN 250
AND 258PM.
0300 PM TSTM WND DMG 1 SW PEKIN 40.56N 89.64W
08/10/2020 TAZEWELL IL PUBLIC
LARGE TREE DOWN BLOCKING A ROAD
0300 PM TSTM WND DMG HOPEDALE 40.42N 89.42W
08/10/2020 TAZEWELL IL PUBLIC
GRAIN BIN DAMAGED
0306 PM TSTM WND DMG 3 E SOUTH PEKIN 40.50N 89.59W
08/10/2020 TAZEWELL IL STORM CHASER
10 INCH DIAMETER TREE BRANCHES DOWN
0306 PM TSTM WND GST 3 E SOUTH PEKIN 40.50N 89.59W
08/10/2020 E80.00 MPH TAZEWELL IL STORM CHASER
0310 PM TSTM WND DMG 2 NE HAVANA 40.32N 90.03W
08/10/2020 MASON IL EMERGENCY MNGR
DOWNED POWER LINES CAUSED A FOUR ACRE FIELD FIRE
0311 PM TSTM WND DMG 2 WNW BLOOMINGTON 40.49N 89.00W
08/10/2020 MCLEAN IL EMERGENCY MNGR
LARGE TREE LIMB WENT THROUGH ROOF ON 700 BLOCK OF W
WALNUT. RAFTERS DAMAGED. DELAYED REPORT. TIME ESTIMATED.
0311 PM TSTM WND DMG 1 WNW BLOOMINGTON 40.49N 89.00W
08/10/2020 MCLEAN IL TRAINED SPOTTER
LARGE TREE LIMB DOWN
0312 PM TSTM WND GST TOWANDA 40.56N 88.90W
08/10/2020 M58.00 MPH MCLEAN IL PUBLIC
0315 PM TSTM WND DMG NORMAL 40.52N 89.00W
08/10/2020 MCLEAN IL NWS EMPLOYEE
LARGE TREE UPROOTED AND DOWN ON TWO HOMES NEAR
CONSTITUTION TRAIL. ONE LARGE TREE BRANCH ALSO DOWN.
0315 PM TSTM WND DMG 3 S BLOOMINGTON 40.43N 88.96W
08/10/2020 MCLEAN IL EMERGENCY MNGR
20 INCH TREE LIMB DOWN. NO STRUCTURAL DAMAGE REPORTED.
TIME ESTIMATED.
0315 PM TSTM WND DMG DUNLAP 40.86N 89.68W
08/10/2020 PEORIA IL EMERGENCY MNGR
TREE DOWN ON HOUSE AT 1ST AND 4TH ST. TREE BRANCHES DOWN
AT 5TH AND ATLANTA.
0316 PM TSTM WND GST HAVANA 40.30N 90.06W
08/10/2020 E50.00 MPH MASON IL PUBLIC
0316 PM TSTM WND DMG EAST PEORIA 40.67N 89.55W
08/10/2020 TAZEWELL IL BROADCAST MEDIA
NUMEROUS MATURE BRANCHES DOWN NEAR VETERANS AND
BLOOMINGTON ROAD.
0317 PM TSTM WND GST 2 WNW TOWANDA 40.57N 88.94W
08/10/2020 M57.00 MPH MCLEAN IL MESONET
APRS MESONET
0320 PM TSTM WND GST BLOOMINGTON AIRPORT 40.48N 88.92W
08/10/2020 M64.00 MPH MCLEAN IL AWOS
0326 PM TSTM WND GST NORMAL 40.52N 89.00W
08/10/2020 M51.00 MPH MCLEAN IL EMERGENCY MNGR
MEASURED AT ILLINOIS STATE UNIVERSITY
0328 PM TSTM WND DMG ALTA 40.82N 89.63W
08/10/2020 PEORIA IL EMERGENCY MNGR
EIGHT INCH TREE LIMBS DOWN
0330 PM TSTM WND DMG MASON CITY 40.20N 89.70W
08/10/2020 MASON IL EMERGENCY MNGR
ONE FOOT TREE LIMB DOWN ON CAR
0330 PM TSTM WND DMG MASON CITY 40.20N 89.70W
08/10/2020 MASON IL EMERGENCY MNGR
POWER POLE IN AMEREN PARKING LOT FELL ON CAR.
0340 PM TSTM WND DMG PEORIA 40.74N 89.61W
08/10/2020 PEORIA IL EMERGENCY MNGR
10 INCH TREE DOWN AND EIGHT INCH TREE BRANCHES DOWN
0345 PM TSTM WND GST W SPRINGFIELD 39.80N 89.64W
08/10/2020 M58.00 MPH SANGAMON IL TRAINED SPOTTER
0345 PM TSTM WND DMG 3 N SPRINGFIELD 39.85N 89.65W
08/10/2020 SANGAMON IL AMATEUR RADIO
18 INCH DIAMETER TREE UPROOTED.
0345 PM TSTM WND DMG BELLFLOWER 40.34N 88.53W
08/10/2020 MCLEAN IL EMERGENCY MNGR
POWER POLES DAMAGED
0345 PM TSTM WND DMG RIVERTON 39.85N 89.54W
08/10/2020 SANGAMON IL UTILITY COMPANY
POWER POLES DOWN ON S 9TH ST.
0345 PM TSTM WND DMG 1 NNW SPRINGFIELD 39.82N 89.66W
08/10/2020 SANGAMON IL EMERGENCY MNGR
POWER LINE DOWN DUE TO 36 INCH DIAMETER TREE BEING
UPROOTED. TREE WAS PARTIALLY ROTTEN IN THE MIDDLE. TIME
ESTIMATED BY RADAR.
0350 PM TSTM WND DMG 1 SE LANE 40.12N 88.84W
08/10/2020 DE WITT IL MESONET
TWO LARGE TREES WERE BLOWN DOWN...ONE OF WHICH FELL ONTO
A GRAIN BIN.
0350 PM TSTM WND DMG SPRINGFIELD 39.80N 89.64W
08/10/2020 SANGAMON IL EMERGENCY MNGR
POWER LINES DOWN AT 9TH AND CARPENTER. TIME ESTIMATED BY
RADAR.
0351 PM TSTM WND GST 1 N DAWSON 39.87N 89.46W
08/10/2020 M60.00 MPH SANGAMON IL STORM CHASER
MEASURED WITH HANDHELD ANEMOMETER
0357 PM TSTM WND DMG LE ROY 40.34N 88.76W
08/10/2020 MCLEAN IL TRAINED SPOTTER
6-8 INCH TREE LIMBS DOWN
0400 PM TSTM WND DMG WARRENSBURG 39.93N 89.06W
08/10/2020 MACON IL TRAINED SPOTTER
TREE DOWN ACROSS A ROAD. TIME ESTIMATED BY RADAR. DELAYED
REPORT.
0410 PM TSTM WND DMG BLUE MOUND 39.70N 89.12W
08/10/2020 MACON IL EMERGENCY MNGR
TREE FELL ON HOUSE
0410 PM TSTM WND DMG DECATUR 39.85N 88.93W
08/10/2020 MACON IL EMERGENCY MNGR
12 INCH LIMB DOWN. TIME ESTIMATED BY RADAR.
0420 PM TSTM WND DMG URBANA 40.11N 88.21W
08/10/2020 CHAMPAIGN IL PUBLIC
TWO LARGE TREES DOWN. SHINGLES DAMAGED.
0423 PM TSTM WND GST DECATUR AIRPORT 39.83N 88.87W
08/10/2020 M61.00 MPH MACON IL ASOS
0425 PM TSTM WND DMG URBANA 40.11N 88.21W
08/10/2020 CHAMPAIGN IL EMERGENCY MNGR
TREE DOWN ON A HOUSE
0425 PM TSTM WND DMG URBANA 40.11N 88.21W
08/10/2020 CHAMPAIGN IL EMERGENCY MNGR
TREE DOWN ON A GARAGE
0425 PM TSTM WND GST ROSSVILLE 40.38N 87.67W
08/10/2020 E60.00 MPH VERMILION IL EMERGENCY MNGR
WIND GUSTS ESTIMATED AT 50-60MPH.
0425 PM TSTM WND DMG CHAMPAIGN 40.11N 88.26W
08/10/2020 CHAMPAIGN IL EMERGENCY MNGR
TREE DOWN ON A HOUSE
0425 PM TSTM WND GST WILLARD AIRPORT 40.04N 88.28W
08/10/2020 M60.00 MPH CHAMPAIGN IL ASOS
0430 PM TSTM WND GST 3 SSE URBANA 40.07N 88.18W
08/10/2020 M62.00 MPH CHAMPAIGN IL MESONET
ARPS MESONET
0440 PM TSTM WND DMG 1 ESE OAKWOOD 40.10N 87.76W
08/10/2020 VERMILION IL EMERGENCY MNGR
TWO LARGE TREES DOWN BLOCKING US 150.
0443 PM TSTM WND GST 2 NNW DANVILLE 40.17N 87.63W
08/10/2020 M75.00 MPH VERMILION IL EMERGENCY MNGR
0450 PM TSTM WND DMG DANVILLE 40.14N 87.62W
08/10/2020 VERMILION IL EMERGENCY MNGR
NUMEROUS TREES AND POWER LINES DOWN THROUGHOUT DANVILLE.
SEVERAL STREETS BLOCKED.
0509 PM TSTM WND GST COLES COUNTY AIRPORT 39.48N 88.28W
08/10/2020 M60.00 MPH COLES IL ASOS
CORRECTED TIME
0527 PM TSTM WND DMG 10 SE PARIS 39.51N 87.56W
08/10/2020 EDGAR IL BROADCAST MEDIA
LARGE TREE LIMBS SNAPPED
0647 PM HAIL 1 NW XENIA 38.65N 88.65W
08/10/2020 E0.75 INCH CLAY IL EMERGENCY MNGR
DIME SIZED HAIL
0917 PM HEAVY RAIN CLINTON 40.15N 88.96W
08/10/2020 M1.00 INCH DE WITT IL NWS EMPLOYEE
Additional Information
The Forecast
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| Severe wind outlook from the Storm Prediction Center at 11 am. Hatched area indicates potential for winds >75 mph. | Severe Thunderstorm Watch issued at 11:25 am. This was labeled as a rare "Particularly Dangerous Situation" watch. | Locations of the severe weather reports vs. the 11 am outlook from the Storm Prediction Center |
About Derechos
According to the Storm Prediction Center, a derecho (pronounced duh-REY-cho) is a widespread, long-lived wind storm associated with a band of rapidly moving thunderstorms. The term was originated by Dr. Gustavus Hinrichs of the University of Iowa, first appearing in the American Meteorological Journal in 1888; he coined the term to distinguish straight-line winds from the damage caused by tornadoes (the word "derecho" comes from the Spanish term meaning "direct" or "straight ahead").
By definition, a derecho includes winds of at least 58 mph along most of its length. While most gusts are below 100 mph, occasionally gusts as high as 130 mph (the strength of a strong EF-2 tornado) have been recorded. The swath of wind damage is at least 250 miles in length.
Some Other Derechos Affecting Central Illinois
These summaries are courtesy of the Storm Prediction Center.
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Media use of NWS Web News Stories is encouraged! Please acknowledge the NWS as the source of any news information accessed from this site. |
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