Summary of the June 28 Derecho

Overview

Two rounds of severe thunderstorms occurred on Thursday, June 28. The first round during the midday hours was relatively minor. The more significant outbreak occurred during the evening hours, when a thunderstorm complex raced southward across southern Illinois and western Kentucky. Widespread wind damage occurred with this complex, which met the definition of a derecho.

Tornado
Photos
Radar
Storm Reports
Environment

Tornadoes:

As of late June 29, one tornado has been confirmed. A weak EF-0 tornado occurred near Johnston City, Illinois in Williamson County. Straight-line winds in excess of 65 mph were responsible for most of the damage in our region. Derechos can contain winds of 100 mph or more, as we saw during the "super-derecho" that struck pasts of southern Illinois and southeast Missouri in May, 2009.

Tornado - Johnston City, IL
Williamson County

Date	June 28, 2018
Time (Local)	7:12-7:13 PM CDT
EF Rating	EF-0
Est. Peak Winds	85 mph
Path Length	0.25 miles
Max Width	75 yards
Injuries/Deaths	0/0
Summary: A softwood tree was snapped in front of a single story house and Peterson Avenue, and several shingles were blown off of the roof. Two garage buildings were blown off their foundation, and debris was scattered a couple hundred yards downstream. A tree fell onto power lines, causing a wooden power pole to snap at the base. An eyewitness reported watching a tornado destroy the two garage buildings. The tornado continued on the ground a few hundred yards onto his property, where he saw a cedar tree that was briefly lifted and other numerous trees snapped.

Track Map

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Photos:


Shelf cloud at NWS Paducah (Ashley Ravenscraft)	Gallatin County IL High School (Shawneetown Fire Dept)	Shelf cloud at Jackson, MO (Rachel Trevino)

Radar:

Radar loop link below is from 11 AM to 11 PM. The main event was from 6 PM to 10 PM as the derecho moved from south to north.

Click here for a radar loop of this event

Storm Reports

Below is a map of just some of the damage that occurred during the evening derecho on June 28. A nearly continuous damage area encompassed the Interstate 57 corridor of southern Illinois down through the Purchase area of western Kentucky. Damage was more sporadic on either side of this area. One fatality occurred in Carlisle County, Kentucky, where a motorcyclist was killed after striking a fallen tree.

Map of storm reports on June 28

0535 PM     HAIL             E SESSER                38.09N 89.05W
06/28/2018  E0.88 INCH       FRANKLIN           IL   EMERGENCY MNGR

0650 PM     TSTM WND DMG     TAMAROA                 38.14N 89.23W
06/28/2018                   PERRY              IL   EMERGENCY MNGR

            MULTIPLE TREES REPORTED DOWN ACROSS TOWN. ENTIRE TOWN
            WITHOUT POWER.

0655 PM     TSTM WND DMG     MOUNT VERNON            38.32N 88.91W
06/28/2018                   JEFFERSON          IL   EMERGENCY MNGR

            POWER OUTAGES REPORTED THROUGHOUT THE COUNTY.

0658 PM     TSTM WND DMG     PINCKNEYVILLE           38.08N 89.38W
06/28/2018                   PERRY              IL   TRAINED SPOTTER

            MULTIPLE REPORTS OF TREES DOWN IN THE PINCKNEYVILLE AREA.
            AT LEAST ONE TREE DOWN ON POWER LINES.

0700 PM     TSTM WND GST     SESSER                  38.09N 89.05W
06/28/2018  E70.00 MPH       FRANKLIN           IL   PUBLIC

            ESTIMATED WIND GUSTS OF 70 MPH AS IT MOVED THROUGH TOWN.

0700 PM     TSTM WND DMG     DU QUOIN                38.00N 89.24W
06/28/2018                   PERRY              IL   LAW ENFORCEMENT

            MULTIPLE REPORTS OF TREES AND LIMBS DOWN ACROSS TOWN.

0700 PM     TSTM WND DMG     3 W WHITTINGTON         38.09N 88.96W
06/28/2018                   FRANKLIN           IL   EMERGENCY MNGR

            ESTIMATED AT LEAST 60 MPH WINDS. MULTIPLE POWER POLES
            DOWN INCLUDING ONE TRAPPING A VEHICLE ON STATE HWY 154 AT
            REND LAKE.

0700 PM     TSTM WND DMG     DU QUOIN                38.00N 89.24W
06/28/2018                   PERRY              IL   EMERGENCY MNGR

            TREE DOWN ON AN ATTACHED GARAGE

0705 PM     TSTM WND DMG     WEST CITY               38.00N 88.95W
06/28/2018                   FRANKLIN           IL   TRAINED SPOTTER

            MULTIPLE TREES DOWN IN THE WEST CITY AREA.

0705 PM     TSTM WND GST     WAYNE CITY              38.35N 88.59W
06/28/2018  E75.00 MPH       WAYNE              IL   BROADCAST MEDIA

            75 MPH GUST MEASURED BY WUNDERGROUND PERSONAL WEATHER
            STATION.

0705 PM     TSTM WND DMG     BENTON                  38.01N 88.92W
06/28/2018                   FRANKLIN           IL   TRAINED SPOTTER

            TREES DOWN ON POWER LINES. UP TO 2 FOOT DIAMETER TREE
            BRANCHES DOWN ON NORTH SIDE OF TOWN. STREET FLOODING
            OCCURRING.

0712 PM     TORNADO          1 E JOHNSTON CITY
06/28/2018                   WILLIAMSON         IL   NWS STORM SURVEY

            A BRIEF EF-0 TORNADO OCCURRED APPROXIMATELY 1 MILE EAST OF 
            JOHNSTON CITY. TWO GARAGE BUILDINGS WERE BLOWN OFF THEIR 
            FOUNDATIONS AND NUMEROUS TREES WERE UPROOTED OR SNAPPED WITHIN 
            THE DAMAGE PATH. ESTIMATED PEAK WIND AT 85 MPH.

0713 PM     TSTM WND GST     CARBONDALE              37.72N 89.22W
06/28/2018  M67.00 MPH       JACKSON            IL   ASOS

            67 MPH WIND GUST RECORDED AT SOUTHERN ILLINOIS AIRPORT IN
            CARBONDALE.

0715 PM     TSTM WND DMG     CARTERVILLE             37.76N 89.08W
06/28/2018                   WILLIAMSON         IL   TRAINED SPOTTER

            SHINGLES BLOWN OFF ROOF, TREES DOWN, POWER OUT IN
            PORTIONS OF TOWN.

0715 PM     TSTM WND DMG     BURNA                   37.26N 88.39W
06/28/2018                   LIVINGSTON         KY   PUBLIC

            SEVERAL TREES UPROOTED ON HWY 60 NEAR INTERSECTION OF HWY
            135

0715 PM     TSTM WND GST     CARTERVILLE             37.76N 89.08W
06/28/2018  E60.00 MPH       WILLIAMSON         IL   TRAINED SPOTTER

            WINDS ESTIMATED AT 60+ MPH IN CARTERVILLE

0715 PM     TSTM WND DMG     HERRIN                  37.80N 89.03W
06/28/2018                   WILLIAMSON         IL   PUBLIC

            NUMEROUS REPORTS OF TREES, POWER LINES, AND LARGE TREE
            LIMBS DOWN. WIDESPREAD POWER OUTAGES.

0718 PM     TSTM WND DMG     CARBONDALE              37.72N 89.22W
06/28/2018                   JACKSON            IL   TRAINED SPOTTER

            MULTIPLE TREES DOWN IN CARBONDALE. SPOTTER REPORTED A
            POSSIBLE FUNNEL CLOUD.

0720 PM     TSTM WND GST     2 W MARION              37.73N 88.98W
06/28/2018  E65.00 MPH       WILLIAMSON         IL   TRAINED SPOTTER

            65 MPH WIND GUSTS ON WEST SIDE OF MARION

0720 PM     TSTM WND DMG     RALEIGH                 37.83N 88.53W
06/28/2018                   SALINE             IL   LAW ENFORCEMENT

            LARGE TREE BLOCKING ILLINOIS RT 34 NORTH OF TOWN.

0720 PM     TSTM WND DMG     CARBONDALE              37.72N 89.22W
06/28/2018                   JACKSON            IL   TRAINED SPOTTER

            MULTIPLE TREES BLOWN DOWN, POWER POLES DOWN, INTENSE
            LIGHTNING. OLD ROUTE 13 BLOCKED DUE TO MULTIPLE TREES
            ACROSS ROAD BETWEEN GIANT CITY RD AND REED STATION RD.

0720 PM     TSTM WND DMG     HARRISBURG              37.74N 88.55W
06/28/2018                   SALINE             IL   LAW ENFORCEMENT

            SIGN BLOWN APART AT THE HARRISBURG-RALEIGH AIRPORT.
            DELAYED REPORT.

0725 PM     TSTM WND DMG     JOHNSTON CITY           37.82N 88.93W
06/28/2018                   WILLIAMSON         IL   PUBLIC

            MULTIPLE TREES DOWN AND STRUCTURAL DAMAGE.

0728 PM     TSTM WND DMG     6 S MARION              37.65N 88.94W
06/28/2018                   WILLIAMSON         IL   PUBLIC

            PUBLIC REPORT OF A BOAT DOCK BEING RIPPED OFF BY WINDS.

0730 PM     TSTM WND DMG     CARBONDALE              37.72N 89.22W
06/28/2018                   JACKSON            IL   EMERGENCY MNGR

            TREE DAMAGE AND POWER LINES DOWN IN CARBONDALE.

0730 PM     TSTM WND DMG     MARION                  37.73N 88.94W
06/28/2018                   WILLIAMSON         IL   EMERGENCY MNGR

            MULTIPLE POWER OUTAGES, TREES AND POWER LINES DOWN
            THROUGHOUT THE COUNTY. STRUCTURAL DAMAGE AS WELL.

0735 PM     TSTM WND DMG     HARRISBURG              37.74N 88.55W
06/28/2018                   SALINE             IL   LAW ENFORCEMENT

            NUMEROUS TREES DOWN IN SALINE COUNTY.

0735 PM     FLASH FLOOD      PINCKNEYVILLE           38.08N 89.38W
06/28/2018                   PERRY              IL   EMERGENCY MNGR

            NUMEROUS REPORTS OF FLASH FLOODING ON SEVERAL COUNTY
            ROADWAYS THROUGHOUT THE COUNTY.

0740 PM     TSTM WND DMG     BUNCOMBE                37.47N 88.97W
06/28/2018                   JOHNSON            IL   TRAINED SPOTTER

            TREE SPLIT IN HALF AND LANDED ON A HOME. RESIDENT OKAY.

0742 PM     TSTM WND DMG     WEST FRANKFORT          37.90N 88.93W
06/28/2018                   FRANKLIN           IL   PUBLIC

            NUMEROUS TREES AND LARGE LIMBS DOWN AS WELL AS POWER
            LINES.

0745 PM     TSTM WND DMG     EDDYVILLE               37.50N 88.59W
06/28/2018                   POPE               IL   TRAINED SPOTTER

            SEVERAL TREES BLOCKING HWY 145 BETWEEN DELWOOD AND
            EDDYVILLE. ALSO SEVERAL TREES DOWN BLOCKING EDDYVILLE
            BLACKTOP BETWEEN FLICK HILL AND HWY 146 IN GOLCONDA.

0745 PM     TSTM WND DMG     JUNCTION                37.72N 88.24W
06/28/2018                   GALLATIN           IL   LAW ENFORCEMENT

            REPORT OF ROOF BLOWN OFF OF GALLATIN COUNTY SCHOOL. TIME
            ESTIMATED BY RADAR.

0750 PM     TSTM WND DMG     PERRYVILLE              37.73N 89.87W
06/28/2018                   PERRY              MO   LAW ENFORCEMENT

            *** 1 INJ *** A PERSON WAS HIT BY AWNING AT INTERSECTION
            OF HWY 51 AND 61 DUE TO STRONG WINDS.

0750 PM     TSTM WND DMG     VIENNA                  37.41N 88.89W
06/28/2018                   JOHNSON            IL   EMERGENCY MNGR

            WIDESPREAD TREES AND POWER LINES DOWN ACROSS THE COUNTY

0752 PM     TSTM WND DMG     NORRIS CITY             37.98N 88.33W
06/28/2018                   WHITE              IL   TRAINED SPOTTER

            TREE DOWN ON A HOUSE IN NORRIS CITY AND MULTIPLE TREES
            DOWN IN THE AREA.

0755 PM     FLASH FLOOD      PINCKNEYVILLE           38.08N 89.38W
06/28/2018                   PERRY              IL   TRAINED SPOTTER

            REPORT OF FLOODING THROUGHOUT PERRY COUNTY. WATER OVER
            ROADWAY IN PINCKNEYVILLE WAS UP TO THE BOTTOM OF DOOR ON
            TRUCK ON RANDOLPH STREET.

0800 PM     TSTM WND DMG     ROUND KNOB              37.22N 88.73W
06/28/2018                   MASSAC             IL   PUBLIC

            TREE FELL ON A TRAILER.

0800 PM     TSTM WND DMG     METROPOLIS              37.15N 88.71W
06/28/2018                   MASSAC             IL   LAW ENFORCEMENT

            ROOF LIFTED OFF QUINT EXCAVATING ON WEST 10TH STREET.

0809 PM     TSTM WND GST     WEST PADUCAH            37.08N 88.74W
06/28/2018  E62.00 MPH       MCCRACKEN          KY   ASOS

            MEASURED WIND GUST TO 62 MPH AT KPAH ASOS.

0810 PM     TSTM WND DMG     BROOKPORT               37.12N 88.63W
06/28/2018                   MASSAC             IL   PUBLIC

            TREES DOWN IN BROOKPORT.

0810 PM     TSTM WND DMG     BROOKPORT               37.12N 88.63W
06/28/2018                   MASSAC             IL   PUBLIC

            SEVERAL REPORTS OF TREES AND LARGE LIMBS DOWN

0810 PM     TSTM WND DMG     PADUCAH                 37.07N 88.64W
06/28/2018                   MCCRACKEN          KY   PUBLIC

            NUMEROUS REPORTS OF TREES AND POWER LINES DOWN AND SOME
            POWER OUTAGES IN THE PADUCAH AREA.

0810 PM     TSTM WND DMG     3 E BROOKPORT           37.12N 88.57W
06/28/2018                   MASSAC             IL   PUBLIC

            LARGE TREE UPROOTED AND HAS FALLEN ON A MOBILE HOME
            CARPORT.

0815 PM     TSTM WND GST     4 NE MARION             37.37N 88.03W
06/28/2018  M56.00 MPH       CRITTENDEN         KY   MESONET

            MEASURED AT KY MESONET

0815 PM     TSTM WND DMG     MELBER                  36.95N 88.73W
06/28/2018                   GRAVES             KY   PUBLIC

            LARGE TREE TOOK DOWN POWER POLES AND LINES IN FRONT OF A
            HOUSE.

0815 PM     TSTM WND DMG     LA CENTER               37.07N 88.97W
06/28/2018                   BALLARD            KY   EMERGENCY MNGR

            NUMEROUS TREES DOWN ACROSS THE COUNTY.

0820 PM     TSTM WND DMG     SHARPE                  36.97N 88.46W
06/28/2018                   MARSHALL           KY   EMERGENCY MNGR

            8-10 INCH DIAMETER TREE DOWN AND 6 FOOT FENCE PANEL DOWN.


0820 PM     TSTM WND DMG     1 SE JACKSON            37.37N 89.64W
06/28/2018                   CAPE GIRARDEAU     MO   AMATEUR RADIO

            LARGE TREE DOWN NEAR TEEN CHALLENGE IN JACKSON

0820 PM     TSTM WND GST     REIDLAND                37.01N 88.53W
06/28/2018  E60.00 MPH       MCCRACKEN          KY   PUBLIC

            ESTIMATED 60 MPH WINDS.

0821 PM     TSTM WND DMG     LONE OAK                37.04N 88.67W
06/28/2018                   MCCRACKEN          KY   PUBLIC

            POWER OUTAGES REPORTED IN LONE OAK.

0825 PM     TSTM WND GST     4 N BENTON              36.91N 88.36W
06/28/2018  M53.00 MPH       MARSHALL           KY   MESONET

            MEASURED AT KY MESONET STATION

0830 PM     TSTM WND DMG     BENTON                  36.85N 88.36W
06/28/2018                   MARSHALL           KY   BROADCAST MEDIA

            80 PERCENT OF TOWN WITHOUT POWER.

0840 PM     FLASH FLOOD      CAPE GIRARDEAU          37.31N 89.55W
06/28/2018                   CAPE GIRARDEAU     MO   TRAINED SPOTTER

            SPOTTER REPORTED AN ESTIMATE OF 3 INCHES OVER SEVERAL
            ROADWAYS IN CAPE GIRARDEAU COUNTY.

0840 PM     TSTM WND GST     8 SE MAYFIELD           36.65N 88.54W
06/28/2018  E60.00 MPH       GRAVES             KY   PUBLIC

            ESTIMATED 60 MPH WINDS IN FARMINGTON

0840 PM     TSTM WND DMG     CUNNINGHAM              36.92N 88.91W
06/28/2018                   CARLISLE           KY   EMERGENCY MNGR

            TREE ON HOUSE IN CUNNINGHAM AREA ON COUNTY ROAD 1054.
            MULTIPLE TREES DOWN THROUGHOUT THE COUNTY.

0844 PM     TSTM WND DMG     MELBER                  36.95N 88.73W
06/28/2018                   GRAVES             KY   EMERGENCY MNGR

            TREE DOWN ON A HOUSE.

0845 PM     TSTM WND DMG     CUNNINGHAM              36.92N 88.91W
06/28/2018                   CARLISLE           KY   EMERGENCY MNGR

            HWY 62 BETWEEN CUNNINGHAM AND BARDWELL BASICALLY
            IMPASSABLE DUE TO SO MANY TREES ACROSS THE ROAD.
            WIDESPREAD TREE DAMAGE ACROSS THE COUNTY.

0845 PM     TSTM WND DMG     1 S MURRAY              36.60N 88.32W
06/28/2018                   CALLOWAY           KY   EMERGENCY MNGR

            LARGE MAPLE TREE DOWN ONTO POWER LINE ON PEGGY ANN DRIVE
            ON SOUTH SIDE OF MURRAY.

0849 PM     TSTM WND DMG     N CADIZ                 36.87N 87.82W
06/28/2018                   TRIGG              KY   EMERGENCY MNGR

            MULTIPLE TREES DOWN ON THE NORTH SIDE OF CADIZ.

0850 PM     TSTM WND DMG     FANCY FARM              36.76N 88.79W
06/28/2018                   GRAVES             KY   TRAINED SPOTTER

            SEVERAL REPORTS OF LARGE TREE LIMBS AND TREES DOWN ALONG
            WITH POWER OUTAGES

0852 PM     TSTM WND DMG     CADIZ                   36.87N 87.82W
06/28/2018                   TRIGG              KY   EMERGENCY MNGR

            WIDESPREAD POWER OUTAGES REPORTED IN TRIGG COUNTY.

0852 PM     TSTM WND DMG     LA CENTER               37.07N 88.97W
06/28/2018                   BALLARD            KY   PUBLIC

            WIDESPREAD POWER OUTAGES REPORTED IN BALLARD COUNTY.

0900 PM     TSTM WND DMG     5 NW HOPKINSVILLE       36.91N 87.55W
06/28/2018                   CHRISTIAN          KY   EMERGENCY MNGR

            65 MPH WINDS ESTIMATED AND POWER IS OUT ON HWY 91 AT
            SINKING FORK CHURCH

0902 PM     TSTM WND DMG     FREDONIA                37.21N 88.06W
06/28/2018                   CALDWELL           KY   EMERGENCY MNGR

            ESTIMATED 700-800 CUSTOMERS WITHOUT POWER IN THE FREDONIA
            AREA.

0906 PM     FLASH FLOOD      4 N CAPE GIRARDEAU      37.37N 89.55W
06/28/2018                   CAPE GIRARDEAU     MO   LAW ENFORCEMENT

            WATER ACROSS STATE ROUTE 177 NEAR TRAIL OF TEARS PARK.

0910 PM     TSTM WND GST     4 NW HOPKINSVILLE       36.90N 87.54W
06/28/2018  E80.00 MPH       CHRISTIAN          KY   EMERGENCY MNGR

            NEAR SINKING FORK SCHOOL ON HIGHWAY 91 NORTHWEST OF
            HOPKINSVILLE

0914 PM     TSTM WND DMG     HAZEL                   36.51N 88.33W
06/28/2018                   CALLOWAY           KY   EMERGENCY MNGR

            POWER OUTAGE REPORTED FOR THE ENTIRE HAZEL AREA.

1002 PM     TSTM WND DMG     WAPPAPELLO              36.94N 90.27W
06/28/2018                   WAYNE              MO   EMERGENCY MNGR

            TREES DOWN.

1048 PM     TSTM WND GST     ELLSINORE               36.93N 90.75W
06/28/2018  M50.00 MPH       CARTER             MO   BROADCAST MEDIA

            MEASURED VIA PERSONAL WEATHER STATION.

Environment

A very moist and unstable air mass set the stage for this derecho. Surface dew points were near 80 degrees, with mixed-layer capes over 4000. When the atmosphere is that unstable, wind shear does not need to be particularly strong for significant severe weather to occur.


Figure 1: CAPE at 21z	Figure 2: 0-6 km shear at 21z	Figure 3: 850 mb at 21z

Additional environment-related info from the SPC.


Figure 4: MCD 931 from SPC	Figure 5: Storm report map for 6/28	Figure 6: 500 mb map (00z 29 Jun)

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