January 20-21, 2012 Central Indiana Winter Weather

Surface Weather Map valid at 10 PM EST January 20 

Low pressure moved up the Ohio Valley the evening of January 20, allowing a mixture of winter precipitation to fall across central Indiana. Across the northern third of the area, mostly snow fell. Across the central third, mainly sleet with a mix of snow and freezing rain fell. Across the south, mainly freezing rain fell. Snowfall across the north averaged 1 to 3 inches, with around 1 inch of sleet and snow across the central part of the area. Across the south, 1 to 2 tenths of an inch of freezing rain accumulated. Travel became hazardous across much of the area during the evening of the 20th into the morning of the 21st.

 

 

24 hour snowfall ending 7:00 AM Jan 21. Click to enlarge. Snow depth at 7:00 AM Jan 21

Above are maps of 24 hour snowfall (left) and snow depth (right), both valid at 7:00 AM January 21.

Below are reports of precipitation received by the NWS Indianapolis:

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1258 PM EST SAT JAN 21 2012

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

0730 PM     FREEZING RAIN    BLOOMFIELD              39.03N 86.94W
01/20/2012  U0.00 INCH       GREENE             IN   AMATEUR RADIO

            NUMEROUS ACCIDENTS OCCURRING DUE TO ROAD ICING ON HIGHWAY
            54.

0810 PM     FREEZING RAIN    BLOOMINGTON             39.17N 86.52W
01/20/2012  U0.00 INCH       MONROE             IN   AMATEUR RADIO

            RELAYED REPORT FROM COUNTY SHERIFF INDICATES SOLID ICE ON
            COUNTY ROADS. SEVERAL REPORTS OF ACCIDENTS COMING IN.
            REFERENCE CITY IS APPROX/GENERALIZED.

0835 PM     FREEZING RAIN    3 S INDIANAPOLIS        39.73N 86.15W
01/20/2012  U0.00 INCH       MARION             IN   PUBLIC

            SLICK ROADS ON AND AROUND SOUTHPORT

0850 PM     FREEZING RAIN    COLUMBUS                39.21N 85.91W
01/20/2012  U0.00 INCH       BARTHOLOMEW        IN   PUBLIC

            ICY ROADS

0850 PM     FREEZING RAIN    TERRE HAUTE             39.47N 87.38W
01/20/2012  U0.00 INCH       VIGO               IN   BROADCAST MEDIA

            RELAYED HAM RADIO REPORT. ROADWAYS IN TERRE HAUTE AND THE
            COUNTY AS A WHOLE ARE ICE COVERED AND SLICK. POLICE ARE
            WORKING NUMEROUS ACCIDENTS.

0850 PM     SNOW             WEST LAFAYETTE          40.44N 86.91W
01/20/2012  M2.1 INCH        TIPPECANOE         IN   TRAINED SPOTTER

            NEW SNOW OVER PAST 2 HOURS...STORM TOTAL 2.2

0851 PM     SNOW             LAFAYETTE               40.41N 86.87W
01/20/2012  M2.2 INCH        TIPPECANOE         IN   TRAINED SPOTTER

            STORM TOTAL THUS FAR.

0855 PM     FREEZING RAIN    PARAGON                 39.39N 86.56W
01/20/2012  E0.10 INCH       MORGAN             IN   FIRE DEPT/RESCUE

            NUMEROUS ACCIDENTS AND EXTREME DIFFICULTY DRIVING

0900 PM     SNOW             2 NW MUNCIE             40.22N 85.42W
01/20/2012  M0.5 INCH        DELAWARE           IN   TRAINED SPOTTER

            0.4 INCHES OF SLEET AND 0.1 INCHES OF SNOW.

0905 PM     FREEZING RAIN    ODON                    38.84N 86.99W
01/20/2012  E0.10 INCH       DAVIESS            IN   PUBLIC

            ROADS VERY SLICK

0910 PM     SNOW             2 W WEST LAFAYETTE      40.44N 86.95W
01/20/2012  U2.5 INCH        TIPPECANOE         IN   PUBLIC

1001 PM     FREEZING RAIN    SHELBYVILLE             39.52N 85.78W
01/20/2012  E0.10 INCH       SHELBY             IN   TRAINED SPOTTER

            0.10 INCH OF FREEZING RAIN IN THE LAST TWO HOURS.

1008 PM     FREEZING RAIN    SEYMOUR                 38.96N 85.89W
01/20/2012  M0.10 INCH       JACKSON            IN   BROADCAST MEDIA

1024 PM     SNOW             LAFAYETTE               40.41N 86.87W
01/20/2012  M3.0 INCH        TIPPECANOE         IN   TRAINED SPOTTER

            STORM TOTAL.

1025 PM     FREEZING RAIN    BEDFORD                 38.86N 86.49W
01/20/2012  E0.10 INCH       LAWRENCE           IN   PUBLIC

            ROADS AND SIDEWALKS ARE ICY.

1148 PM     SLEET            ANDERSON                40.09N 85.69W
01/20/2012  M0.60 INCH       MADISON            IN   TRAINED SPOTTER

            AMOUNT ACCUMULATED BETWEEN 1748 EST AND 2348 EST.

1215 AM     SLEET            2 S CASTLETON           39.92N 85.49W
01/21/2012  M0.50 INCH       HENRY              IN   CO-OP OBSERVER

0200 AM     SLEET            1 S INDIANAPOLIS INT`L  39.71N 86.29W
01/21/2012  M0.60 INCH       MARION             IN   OFFICIAL NWS OBS

            STORM TOTAL. MAINLY SLEET WITH A LITTLE BIT OF SNOW MIXED
            IN.

0436 AM     SNOW             MUNCIE                  40.20N 85.39W
01/21/2012  M1.4 INCH        DELAWARE           IN   TRAINED SPOTTER

            STORM TOTAL...SNOW AND SLEET

0520 AM     FREEZING RAIN    BEDFORD                 38.86N 86.49W
01/21/2012  E0.20 INCH       LAWRENCE           IN   PUBLIC

            FREEZING RAIN HAS ENDED. HOWEVER SOME GLAZING HAD
            OCCURRED ON SOME SURFACES INCLUDING CARS. ONE TO TWO
            TENTHS OF AN INCH THCIK.

0700 AM     FREEZING RAIN    7 S SPENCER             39.19N 86.77W
01/21/2012  M0.20 INCH       OWEN               IN   TRAINED SPOTTER

            STORM TOTAL. ICE ON POWER LINES AND TREES.

0719 AM     SNOW             ANDERSON                40.09N 85.69W
01/21/2012  M1.6 INCH        MADISON            IN   TRAINED SPOTTER

            0.6 INCH SLEET AND 1 INCH OF SNOW.

0909 AM     FREEZING RAIN    BROOKLYN                39.54N 86.37W
01/21/2012  M0.10 INCH       MORGAN             IN   CO-OP OBSERVER

            STORM 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
 ------  -----------------------  --  --------------   -------
  3.00   LAFAYETTE                IN  TIPPECANOE       1024 PM
                 STORM TOTAL.
  2.50   2 W WEST LAFAYETTE       IN  TIPPECANOE       0910 PM
  2.20   LAFAYETTE                IN  TIPPECANOE       0851 PM
                 STORM TOTAL THUS FAR.
  2.10   WEST LAFAYETTE           IN  TIPPECANOE       0850 PM
                 NEW SNOW OVER PAST 2 HOURS...STORM TOTAL 2.2
  1.60   ANDERSON                 IN  MADISON          0719 AM
                 0.6 INCH SLEET AND 1 INCH OF SNOW.
  1.40   MUNCIE                   IN  DELAWARE         0436 AM
                 STORM TOTAL...SNOW AND SLEET
  0.50   2 NW MUNCIE              IN  DELAWARE         0900 PM
                 0.4 INCHES OF SLEET AND 0.1 INCHES OF SNOW.


SLEET AND FREEZING RAIN REPORTS LISTED BY AMOUNT

 INCHES  LOCATION                 ST  COUNTY           TIME
 ------  -----------------------  --  --------------   -------
  0.60   1 S INDIANAPOLIS INT`L   IN  MARION           0200 AM
                 STORM TOTAL. MAINLY SLEET WITH A LITTLE BIT
                 OF SNOW MIXED IN.
  0.60   ANDERSON                 IN  MADISON          1148 PM
                 AMOUNT ACCUMULATED BETWEEN 1748 EST AND 2348
                 EST.
  0.50   2 S CASTLETON            IN  HENRY            1215 AM
  0.20   7 S SPENCER              IN  OWEN             0700 AM
                 STORM TOTAL. ICE ON POWER LINES AND TREES.
  0.20   BEDFORD                  IN  LAWRENCE         0520 AM
                 FREEZING RAIN HAS ENDED. HOWEVER SOME GLAZING
                 HAD OCCURRED ON SOME SURFACES INCLUDING CARS.
                 ONE TO TWO TENTHS OF AN INCH THCIK.
  0.10   BROOKLYN                 IN  MORGAN           0909 AM
                 STORM TOTAL
  0.10   BEDFORD                  IN  LAWRENCE         1025 PM
                 ROADS AND SIDEWALKS ARE ICY.
  0.10   SEYMOUR                  IN  JACKSON          1008 PM
  0.10   SHELBYVILLE              IN  SHELBY           1001 PM
                 0.10 INCH OF FREEZING RAIN IN THE LAST TWO
                 HOURS.
  0.10   ODON                     IN  DAVIESS          0905 PM
                 ROADS VERY SLICK
  0.10   PARAGON                  IN  MORGAN           0855 PM
                 NUMEROUS ACCIDENTS AND EXTREME DIFFICULTY
                 DRIVING
  0.00   TERRE HAUTE              IN  VIGO             0850 PM
                 RELAYED HAM RADIO REPORT. ROADWAYS IN TERRE
                 HAUTE AND THE COUNTY AS A WHOLE ARE ICE
                 COVERED AND SLICK. POLICE ARE WORKING
                 NUMEROUS ACCIDENTS.
  0.00   COLUMBUS                 IN  BARTHOLOMEW      0850 PM
                 ICY ROADS
  0.00   3 S INDIANAPOLIS         IN  MARION           0835 PM
                 SLICK ROADS ON AND AROUND SOUTHPORT
  0.00   BLOOMINGTON              IN  MONROE           0810 PM
                 RELAYED REPORT FROM COUNTY SHERIFF INDICATES
                 SOLID ICE ON COUNTY ROADS. SEVERAL REPORTS OF
                 ACCIDENTS COMING IN. REFERENCE CITY IS
                 APPROX/GENERALIZED.
  0.00   BLOOMFIELD               IN  GREENE           0730 PM
                 NUMEROUS ACCIDENTS OCCURRING DUE TO ROAD
                 ICING ON HIGHWAY 54.

$$


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