![]() ![]() An upper level ridge from dominated the weather pattern for much of the summer and blocked any flow of moisture that would trigger thunderstorms that is normally experienced during the summer. On the flip side, 2012 was one of the warmest and driest summers on record creating one of the worst droughts in the state since the 1930s. With the rainfall resulting in the flood of 2008 and the remains of Hurricane Ike resulting in tremendous rainfall. ![]() Indiana saw one of their driest and wettest summers on average within a four year span. What the map doesn’t tell is the inconsistency of rainfall from year to year during the summer. What the key of the map makes it misleading is the fact that it is the most even in terms of rainfall the state gets near equal amount of rainfall on average. The driest portion of the state is generally southwestern Indiana, which generally sees the most precipitation on average throughout the year. This is due to the randomness of summertime thunderstorms that form due to daytime heating. The highest averages in the state tended to be centered around Cass, Clay, Fulton, Owen, Pulaski, and Putnam counties. There is no correlation between the summer precipitation map and the annual precipitation total map. Summer precipitation is the most inconsistent of all the four seasons despite the seasonal average from 1980-2020 having the smallest range of 2.6 inches from maximum to minimum average summer precipitation over the select period. Most if not all the precipitation comes from scattered, small-scale thunderstorms that form due to daytime heating. Summer is the most unpredictable season of the four when it comes to climatological precipitation predictions. This map takes into account Meteorological Spring, which runs from March 1st to May 31st. Spring on average is the wettest season of the four seasons for much of the state and totals stay rather consistent from year to year. Most precipitation in the south least precipitation to the north. The trend of Spring precipitation aligns similarly to the annual precipitation average in terms of trends. This map takes into account Meteorological winter, which runs from December 1st to February 28th/29th. ![]() December and January is commonly the best months for lake effect snow to occur as the largest temperature contrast between the quickly cooling air and the slowly cooling lake water. This can add several inches of melted precipitation to an area’s annual precipitation totals. The warmer large body of water compared to the cool dry air mass of the winter months accompanied by north winds can lead to large lake effect snow amounts. These counties all boarder Lake Michigan to the north and sees higher precipitation totals in the winter due to lake effect snow that affects areas in proximity near the lake. Some locally higher precipitation averages can be found along northern LaPorte, Porter, and Lake Counties. The trend of southern Indiana receiving more precipitation remains the case for the winter months. There is roughly a 20 inch difference from driest to wettest portions of the state. Some of the driest parts of the state is located over northeastern Indiana, generally under 35 inches of precipitation per year on average. The southern portion of the state tends to get over 45 inches of rain per year regularly. Reported damage includes downed power lines, downed trees and overturned semis and damaged vehicles.The annual average precipitation total map shows the highest amounts over southern Indiana. Reports of the damage came in from across Indiana, including areas in Boone, Clinton, Howard, Madison, Morgan, Shelby and Tippecanoe counties. Howard County witnessed two EF0 tornadoes with maximum winds of 80 miles per hour and one EF1 tornado with peak winds of 110 miles per hour. In addition to tornadoes touching down in Sullivan and Johnson counties, four other tornados were confirmed in Howard and Clinton counties.Ĭlinton County recorded an EF1 tornado featuring peak winds of 110 miles per hour. Survey teams with the NWS are still out surveying different locations across Indiana. Now 7 total tornadoes across NWS #Indy area from Fri evening. SW Howard Co 2 EF0 tornadoes w/ peak winds at 80mph Our survey teams have found 4 additional tornadoes. ![]()
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