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Overview

A strong area of low pressure moved through the Ohio Valley, bringing blizzard conditions to parts of northwest sections of central Indiana. Southeastern areas saw mainly rain with this event. Conditions changed rapidly in short distances across the northwest half of the area. Snowfall

Snowfall Image.

Snow/Ice

Snow amounts ranged from a trace across eastern and southern sections of the area to around 6 inches across the extreme northwest portions. A tight gradient in snowfall amounts was seen in the northwest, where a band of heavy snow set up and lingered. Please see the Meteorology and Radar sections for more information.

Click on the snowfall map for a larger version.

Snowfall Map

24 Hour Snowfall Map, ending at about 7:00 AM EST February 24

REPORTS RECEIVED BY NWS INDIANAPOLIS

...PRELIMINARY SNOW AND SLEET TOTALS...

LOCATION                      SNOWFALL    COMMENTS                   
                               IN/S/

DELPHI IN                       6.0        148 PM   2/24             
PURDUE UNIVERSITY IN            5.0        142 PM   2/24             
3 N WEST LAFAYETTE IN           4.7        320 PM   2/24             
2 NW CLINTON IN                 4.3        654 PM   2/24             
WAYNETOWN IN                    3.0        833 PM   2/24             
2 S CASTLETON IN                2.3        700 AM   2/25   


 


Meteorology

Surface Map
Surface Map and Radar Valid at 1:00 PM EST Febrary 24

A strong area of low pressure, one that was responsible for a severe weather outbreak on February 23 across parts of the Gulf Coast area, moved through the Ohio Valley. Strong forcing with this system brought moderate rain to parts of the area early in the morning of the 24th, which led to minor flooding of the area. Indianapolis set a record rainfall for the date with 1.70".  The low brought gusty winds, with peak winds during the day of around 40 mph. Surface pressure (adjusted to sea level) dipped to around 29.20".

Cold air wrapped into northwest sections of central Indiana during the morning, changing the rain to snow. Strong forcing remained in place across northwest sections of the area during the day, keeping the snow across the same areas. This led to the higher snow amounts. Warmer air just to the southeast kept the precipitation as rain until mid afternoon, leading to lower snow amounts. The difference in temperatures between the snow and rain areas was just a few degrees.

Below is a multi-day satellite loop (water vapor image) of the storm system as it developed and moved across the area. The loop starts in the evening of the 23rd and goes into the morning of the 25th. Loop courtest of NWS Chicago.

Water Vapor Satellite Loop


Radar:

Below is a radar loop from about 12:00 PM to 1:00 PM on the 24th. This example shows how the heavier precipitation remained across the northwest portions of central Indiana, which eventually led to higher snow amounts.

Radar Loop from 12-1pm Feb 24.

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