Public Information Statement
Issued by NWS Chicago, IL

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NOUS43 KLOT 120242 AAA
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ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
121445-

PUBLIC INFORMATION STATEMENT...UPDATED
NATIONAL WEATHER SERVICE CHICAGO IL
942 PM CDT THU JUN 11 2015

...GIANT HAIL RECORDED IN MINOOKA ON JUNE 10TH WAS THE SECOND
LARGEST OBSERVED HAIL ON RECORD IN THE STATE OF ILLINOIS...

SEVERAL SEVERE STORMS DEVELOPED ACROSS NORTHERN ILLINOIS ON
WEDNESDAY JUNE 10TH. ONE OF THESE PASSED OVER MINOOKA ILLINOIS IN
GRUNDY COUNTY BETWEEN 715 AND 725 PM AND PRODUCED ISOLATED GIANT
HAIL OF UP TO OVER FOUR INCHES IN DIAMETER. THERE WAS A REPORT OF
HAIL TO 4.75 INCHES IN DIAMETER FROM THE PUBLIC THAT WAS VERIFIED
PHOTOGRAPHICALLY. SOME OF THIS HAIL CAUSED SEVERE DAMAGE TO
VEHICLE WINDSHIELDS.

LOOKING AT LARGE HAIL DATA THROUGH THE STORM DATA EVENTS DATABASE
FROM THE NOAA NATIONAL CLIMATIC DATA CENTER /NCDC/...INFORMATION
WAS RETRIEVED THAT MAY HELP TO PUT HAIL THIS SIZE INTO
PERSPECTIVE. RECORDS ON HAIL DATA DATE BACK TO 1950 BUT BECAME
MORE DETAILED AND ROBUST BEGINNING IN THE MID TO LATE 1990S.
ACCORDING TO THE DATABASE:

- THIS WAS THE SECOND LARGEST OBSERVED HAIL ON RECORD IN THE STATE
OF ILLINOIS. THE LARGEST OBSERVED HAIL ON RECORD IN ILLINOIS WAS
ON APRIL 23 1961...WHEN SIX INCH DIAMETER HAIL WAS REPORTED IN
KANKAKEE COUNTY.

- THERE HAVE BEEN 9 INSTANCES OF 4.5 INCH DIAMETER HAIL OBSERVED
IN ILLINOIS...WHICH PREVIOUSLY TIED FOR THE SECOND LARGEST
OBSERVED HAIL ON RECORD IN THE STATE. THE MOST RECENT OCCURRENCE
WAS ON APRIL 28 2012 IN OKAWVILLE IN WASHINGTON COUNTY.

- OVERALL...SINCE 1950...THERE HAVE BEEN ONLY 24 OCCURRENCES OF 4
INCH DIAMETER OR LARGER HAIL IN ILLINOIS AND ONLY 17 OCCURRENCES OF
4 INCH DIAMETER OR LARGER HAIL IN THE STATE OF INDIANA.

- INCLUDING THE 1961 INSTANCE NOTED ABOVE...HERE ARE THE ONLY
INSTANCES OF HAIL OF 4 INCHES OR LARGER IN THE NWS CHICAGO COUNTY
WARNING AREA:

KANKAKEE COUNTY:      APRIL 23 1961:      6 INCH DIAMETER
MINOOKA (GRUNDY):      JUNE 10 2015:   4.75 INCH DIAMETER
BOSWELL (BENTON):      JUNE 14 2010:   4.25 INCH DIAMETER
KANKAKEE COUNTY:        JUNE 8 1981:      4 INCH DIAMETER
COUNTYWIDE (BENTON): AUGUST 18 2001:      4 INCH DIAMETER
DIXON (LEE COUNTY):    JULY 13 2004:      4 INCH DIAMETER

- SINCE 2005...HAIL OF THIS LARGE IN DIAMETER IS REPORTED ABOUT
35-40 TIMES A YEAR IN THE UNITED STATES. HOWEVER...ALMOST ALL OF
THESE REPORTS ARE FROM THE PLAINS STATES.

$$

RC/MTF



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