Severe Thunderstorm and Tropical Storm Bertha Impacts

Numerous severe thunderstorms are expected across a broad region from the Ohio Valley to the Mid-Atlantic and Northeast States today into tonight. Swaths of damaging wind gusts are expected and some tornadoes are possible. Bertha is expected to bring tropical storm conditions to portions of the Gulf Coast from the Florida Panhandle westward to southeastern Louisiana later today and Wednesday. Read More >

Overview

A brief EF0 tornado occurred early Monday evening at around 6:30 pm CDT near the town of Manhattan, IL in central Will County. The only evident impacts of the tornado were some minor corn damage in a field.

Tornado
Radar and Photos
Storm Reports

Tornado:

Tornado - Near Manhattan, IL
Will County

Date	August 20, 2018
Time (Local)	6:31 to 6:34 PM CDT
EF Rating	EF0
Est. Peak Winds	65 mph
Path Length	0.25 miles
Max Width	100 yards
Injuries/Deaths	0
Summary: Based off a trained spotter report, a NWS ground survey was conducted on Wednesday afternoon August 22. This survey revealed multiple patches of flatted corn in a field along Gougar Road near Manhattan, IL. Enough radar and eyewitness evidence exists to suggest that there was briefly a broad and weak circulation on the ground when also taking into account the minor corn damage observed.

Track Map

Downloadable KMZ File

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

Radar and Photos:


Annotated 4 Panel Radar Image from KLOT WSR-88D at time of weak tornado, 6:32 PM CDT 8/20/18.	Photo from a couple miles north of where the tornado ended.

Storm Reports: Public Information Statement

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
425 PM CDT WED AUG 22 2018 /525 PM EDT WED AUG 22 2018/

...NWS DAMAGE SURVEY FOR 08/20/2018 TORNADO...

.BRIEF TORNADO NEAR MANHATTAN ILLINOIS ON MONDAY EVENING...

RATING:                 EF-0
ESTIMATED PEAK WIND:    65 MPH
PATH LENGTH /STATUTE/:  0.25 MILES
PATH WIDTH /MAXIMUM/:   100 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             AUG 20 2018
START TIME:             6:31 PM CDT
START LOCATION:         1 MILE WEST OF MANHATTAN, IL
START LAT/LON:          41.4267/-88.0027

END DATE:               AUG 20 2018
END TIME:               6:34 PM CDT
END LOCATION:           1 MILE WEST OF MANHATTAN, IL
END_LAT/LON:            41.4306/-88.0021

ON WEDNESDAY MORNING, AUGUST 22, A SPOTTER REPORTED HAVING SEEN A
FUNNEL BRIEFLY TOUCH DOWN MONDAY EVENING IN AN AREA THAT THE NWS
HAD BEEN MONITORING CLOSELY ON RADAR AT THE TIME. A GROUND SURVEY
WEDNESDAY AFTERNOON REVEALED MULTIPLE PATCHES OF FLATTENED CORN 
IN A FIELD ALONG GOUGAR ROAD NEAR MANHATTAN, IL. THE STALKS WERE 
ALL LAYING TOWARD THE NORTHEAST. THEY WERE ALSO QUITE DRY AND 
COULD BE SNAPPED OVER WITH LITTLE PRESSURE, BUT ENOUGH RADAR AND 
EYEWITNESS EVIDENCE EXISTS TO SUGGEST THERE WAS BRIEFLY A BROAD 
AND WEAK CIRCULATION ON THE GROUND. 

EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES
TORNADOES INTO THE FOLLOWING CATEGORIES.

EF0...WEAK......65 TO 85 MPH
EF1...WEAK......86 TO 110 MPH
EF2...STRONG....111 TO 135 MPH
EF3...STRONG....136 TO 165 MPH
EF4...VIOLENT...166 TO 200 MPH
EF5...VIOLENT...>200 MPH

NOTE:
THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN
NWS STORM DATA. 

$$

LENNING

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Severe Thunderstorm and Tropical Storm Bertha Impacts

Aug 20, 2018: Weak EF0 Tornado Near Manhattan, IL