Overview
A low pressure system brought freezing rain, sleet, and snow to central Indiana on January 12. The result was slick roads and hazardous travel. Most schools closed for the day.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
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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.
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Figure 3: 3 Hour Temperature Change at 1 AM | Figure 4: Temperature Graph at Indianapolis International Airport |
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