Wintry Mix and Accumulating Snow of January 12, 2018

Snow/Ice

Above is a map of snowfall for the event. Click for a larger version. Below is a list of snow and ice reports received by NWS Indianapolis.

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
954 AM EST SAT JAN 13 2018

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

1100 AM     FREEZING RAIN    2 NW HAYDEN             39.00N 85.76W
01/12/2018  M0.10 INCH       JENNINGS           IN   PUBLIC



1230 PM     FREEZING RAIN    NEW SALEM               39.54N 85.36W
01/12/2018  M0.40 INCH       RUSH               IN   PUBLIC



0143 PM     SNOW             AVON                    39.76N 86.39W
01/12/2018  M1.5 INCH        HENDRICKS          IN   PUBLIC



0145 PM     SNOW             1 NW CARMEL             39.98N 86.12W
01/12/2018  M0.5 INCH        HAMILTON           IN   PUBLIC



0203 PM     SNOW             1 SSE INDIANAPOLIS INT` 39.71N 86.28W
01/12/2018  E0.5 INCH        MARION             IN   OFFICIAL NWS OBS



0207 PM     SNOW             BLOOMINGTON             39.17N 86.52W
01/12/2018  M2.0 INCH        MONROE             IN   PUBLIC



0219 PM     SNOW             MONROVIA                39.58N 86.48W
01/12/2018  M2.0 INCH        MORGAN             IN   PUBLIC



0255 PM     SNOW             5 S DEVORE              39.36N 86.76W
01/12/2018  M2.8 INCH        OWEN               IN   TRAINED SPOTTER

            INCLUDES 0.6 INCH SLEET FROM EARLIER TODAY.

0317 PM     SNOW             2 N BALL STATE UNIVERSI 40.22N 85.41W
01/12/2018  E1.5 INCH        DELAWARE           IN   PUBLIC

            MODERATE SNOW WITH VISIBILITY OF 1/2 MILE.

0320 PM     SNOW             3 NE EAGLE CREEK RESERV 39.88N 86.28W
01/12/2018  M1.5 INCH        MARION             IN   BROADCAST MEDIA

            REPORTED AT 6910 NETWORK PLACE ,
            INDIANAPOLIS, IN.

0335 PM     SNOW             3 E VINCENNES           38.68N 87.46W
01/12/2018  E3.0 INCH        KNOX               IN   TRAINED SPOTTER



0504 PM     SNOW             ELLETTSVILLE            39.23N 86.62W
01/12/2018  M2.5 INCH        MONROE             IN   PUBLIC



0511 PM     SNOW             1 W MCCORDSVILLE        39.91N 85.94W
01/12/2018  M1.3 INCH        MARION             IN   PUBLIC

            APPROXIMATE LOCATION.

0521 PM     SNOW             MARTINSVILLE            39.42N 86.42W
01/12/2018  M2.6 INCH        MORGAN             IN   PUBLIC



0523 PM     SNOW             NEW WHITELAND           39.56N 86.10W
01/12/2018  M2.5 INCH        JOHNSON            IN   PUBLIC



0546 PM     SNOW             3 NNW SMITHVILLE        39.11N 86.53W
01/12/2018  M4.5 INCH        MONROE             IN   PUBLIC

            FORWARDED FROM WTHR.

0607 PM     SNOW             MORRISTOWN              39.67N 85.70W
01/12/2018  M2.0 INCH        SHELBY             IN   LAW ENFORCEMENT



0818 PM     SNOW             2 N TERRE HAUTE         39.50N 87.38W
01/12/2018  M1.5 INCH        VIGO               IN   AMATEUR RADIO

            JUST EAST OF SKYKING.

0530 AM     SNOW             4 W ATLANTA             40.22N 86.11W
01/13/2018  M2.5 INCH        HAMILTON           IN   COCORAHS

            24 HOUR TOTAL.

0630 AM     SNOW             1 NNW OWENSBURG         38.93N 86.73W
01/13/2018  M3.3 INCH        GREENE             IN   COCORAHS

            24 HOUR TOTAL.

0700 AM     SNOW             1 ENE AVOCA             38.92N 86.53W
01/13/2018  M3.5 INCH        LAWRENCE           IN   COCORAHS

            24 HOUR TOTAL.

0700 AM     SNOW             1 W ELLETTSVILLE        39.23N 86.63W
01/13/2018  M2.8 INCH        MONROE             IN   COCORAHS

            24 HOUR TOTAL.

0700 AM     SNOW             2 SE MARTINSVILLE       39.40N 86.39W
01/13/2018  M2.6 INCH        MORGAN             IN   COCORAHS

            24 HOUR TOTAL.

0700 AM     SNOW             2 WSW WINCHESTER        40.16N 85.02W
01/13/2018  M2.5 INCH        RANDOLPH           IN   COCORAHS

            24 HOUR TOTAL.

0700 AM     SNOW             SPENCER                 39.29N 86.77W
01/13/2018  M2.5 INCH        OWEN               IN   COCORAHS

            24 HOUR TOTAL.


&&

THE TOTALS BELOW ARE SEPARATED INTO SNOW...AND ICE AND SLEET
CATEGORIES...THEN BY AMOUNT...AND ARE NOT NECESSARILY THE
FINAL AMOUNT FOR EACH LOCATION.


SNOW REPORTS LISTED BY AMOUNT

 INCHES  LOCATION                 ST  COUNTY           TIME
 ------  -----------------------  --  --------------   -------
  4.50   3 NNW SMITHVILLE         IN  MONROE           0546 PM
                 FORWARDED FROM WTHR.
  3.50   1 ENE AVOCA              IN  LAWRENCE         0700 AM
                 24 HOUR TOTAL.
  3.30   1 NNW OWENSBURG          IN  GREENE           0630 AM
                 24 HOUR TOTAL.
  3.00   3 E VINCENNES            IN  KNOX             0335 PM

  2.80   1 W ELLETTSVILLE         IN  MONROE           0700 AM
                 24 HOUR TOTAL.
  2.80   5 S DEVORE               IN  OWEN             0255 PM
                 INCLUDES 0.6 INCH SLEET FROM EARLIER TODAY.
  2.60   2 SE MARTINSVILLE        IN  MORGAN           0700 AM
                 24 HOUR TOTAL.
  2.60   MARTINSVILLE             IN  MORGAN           0521 PM

  2.50   SPENCER                  IN  OWEN             0700 AM
                 24 HOUR TOTAL.
  2.50   2 WSW WINCHESTER         IN  RANDOLPH         0700 AM
                 24 HOUR TOTAL.
  2.50   4 W ATLANTA              IN  HAMILTON         0530 AM
                 24 HOUR TOTAL.
  2.50   NEW WHITELAND            IN  JOHNSON          0523 PM

  2.50   ELLETTSVILLE             IN  MONROE           0504 PM

  2.00   MORRISTOWN               IN  SHELBY           0607 PM

  2.00   MONROVIA                 IN  MORGAN           0219 PM

  2.00   BLOOMINGTON              IN  MONROE           0207 PM

  1.50   2 N TERRE HAUTE          IN  VIGO             0818 PM
                 JUST EAST OF SKYKING.
  1.50   3 NE EAGLE CREEK RESERV  IN  MARION           0320 PM
                 REPORTED AT 6910 NETWORK PLACE ,
                 INDIANAPOLIS, IN.
  1.50   2 N BALL STATE UNIVERSI  IN  DELAWARE         0317 PM
                 MODERATE SNOW WITH VISIBILITY OF 1/2 MILE.
  1.50   AVON                     IN  HENDRICKS        0143 PM

  1.30   1 W MCCORDSVILLE         IN  MARION           0511 PM
                 APPROXIMATE LOCATION.
  0.50   1 SSE INDIANAPOLIS INT`  IN  MARION           0203 PM

  0.50   1 NW CARMEL              IN  HAMILTON         0145 PM



SLEET AND FREEZING RAIN REPORTS LISTED BY AMOUNT

 INCHES  LOCATION                 ST  COUNTY           TIME
 ------  -----------------------  --  --------------   -------
  0.40   NEW SALEM                IN  RUSH             1230 PM

  0.10   2 NW HAYDEN              IN  JENNINGS         1100 AM

Environment

Figure 1: Surface Map at 1PM EST	Figure 2: 700mb Frontogenesis at 2PM EST (This contributes to bands of heavier snowfall)

Temperatures ahead of the cold front were in the 50s and 60s. Behind the front, temperatures fell into the teens.

Figure 3: 3 Hour Temperature Change at 1 AM	Figure 4: Temperature Graph at Indianapolis International Airport