How Did it Happen?  |    Radar Loop   |   Photos  |   Snowfall Amounts   |   Earliest in Decades

How Did it Happen?

Radar Loop 

Photos

Snowfall Amounts

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
459 AM CDT WED OCT 23 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     SNOW             7 SE EARLVILLE          41.52N 88.83W
10/22/2013  E1.0 INCH        LA SALLE           IL   PUBLIC

            REPORT RELAYED VIA FACEBOOK.

0247 PM     SNOW             MENDOTA                 41.55N 89.12W
10/22/2013  E2.0 INCH        LA SALLE           IL   PUBLIC

            ESTIMATED REPORT OF A COUPLE INCHES RELAYED VIA FACEBOOK.
            STILL SNOWING.

0300 PM     SNOW             4 NE LISBON             41.52N 88.43W
10/22/2013  M0.1 INCH        KENDALL            IL   COCORAHS

            VERY LARGE SNOWFLAKES RESULTED IN SLUSHY ACCUMULATION IN
            THE 30 TO 40 MINUTES LEADING UP TO REPORT.

0300 PM     SNOW             PERU                    41.34N 89.13W
10/22/2013  E1.0 INCH        LA SALLE           IL   PUBLIC

            APPROXIMATE SNOWFALL TOTAL RELAYED VIA FACEBOOK.

0720 PM     SNOW             CHATSWORTH              40.75N 88.29W
10/22/2013  U0.0 INCH        LIVINGSTON         IL   PUBLIC

            ALL SNOW WITH MINOR ACCUMULATION ON GRASSY SURFACES.

0930 PM     SNOW             POLO                    41.98N 89.58W
10/22/2013  M0.8 INCH        OGLE               IL   CO-OP OBSERVER


&&

$$

Earliest Measurable Snowfall in Decades

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
544 AM CDT WED OCT 23 2013 /644 AM EDT WED OCT 23 2013/

...EARLIEST ACCUMULATING SNOWFALL IN DECADES ACROSS PARTS OF NORTH
CENTRAL ILLINOIS...

A QUICK MOVING ALBERTA CLIPPER WEATHER SYSTEM BROUGHT A VERY EARLY
SEASON SNOWFALL TO SOME NORTH CENTRAL ILLINOIS COMMUNITIES. THIS
WAS ONE OF THE EARLIEST MEASURABLE SNOWFALLS ON RECORD FOR THESE
AREAS AND SNOW AMOUNTS VARIED FROM A FEW TENTHS TO AS MUCH AS TWO
INCHES ON GRASSY SURFACES.

PERU:

* OCT 22 2013 SNOWFALL: 1.0 INCH /ESTIMATED FROM PUBLIC/.
* THIS WAS THE SECOND EARLIEST MEASURABLE SNOWFALL ON RECORD SINCE
  1919.
* EARLIEST MEASURABLE SNOWFALL ON RECORD: OCTOBER 19-20 1989.
* LAST OCTOBER MEASURABLE SNOWFALL: OCTOBER 26-27 1997.
* THIS WAS THE SIXTH MEASURABLE SNOWFALL IN OCTOBER SINCE 1919
  YIELDING A RETURN FREQUENCY OF ABOUT ONCE EVER 15 YEARS.

POLO:

* OCT 22 2013 SNOWFALL: 0.8 INCH.
* THIS WAS THE FIRST OCTOBER MEASURABLE SNOWFALL SINCE OCT 26
  1997.

LOOKING AT DATA FROM SEVERAL OTHER COOPERATIVE OBSERVER SITES
ACROSS LASALLE...LEE...AND OGLE COUNTIES...ALL HAD NOT RECEIVED
MEASURABLE SNOW IN OCTOBER SINCE AT LEAST THE OCT 26-27 1997
EVENT...IF NOT EARLIER. WITH THIS SNOWFALL ON TUESDAY HAVING
OCCURRED EVEN SOONER...THIS LOOKED AS IF IT WAS THE EARLIEST
MEASURABLE SNOWFALL IN AT LEAST 20 PLUS YEARS FOR THAT AREA.

$$

MTF/RC