Beth Hall

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The most recent climate outlooks for the October through December period is slightly favoring above-normal temperatures (Figure 1) with equal chances for above-normal, below-normal, or normal precipitation across Indiana (Figure 2). The climate outlooks for October are more strongly favoring above-normal temperatures across the state with precipitation being only slightly favored for the northeastern part of the state.


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Enjoy these cooler, drier September days while you can.  Climate outlooks from the national Climate Prediction Center are strongly favoring above-normal temperatures for the 6-to-10-day period of September 14th through 18th.  Precipitation outlooks are slightly favoring above-normal conditions, but will then shift to drier-than-normal conditions.  This should mean fewer muggy days with lower heat index values.  The average September temperatures across Indiana – based upon the 1991-2020 period – range in the 60s with daytime highs between 75°F and 80°F.  Therefore, even if the climate outlook holds true, above-normal temperatures in September should be more tolerable than in July or August. Modified growing degree-day (MGDD) accumulations since April 1 currently range from slightly above around 2500 units in northern Indiana to slightly over 3200 units in southern Indiana (Figure 1).  This is around 80 to 140 units above normal in the northern part of the state and 50-100 units below[Read More…]




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Precipitation and storm tracks this year seem to be stagnating in patterns that have caused some parts of Indiana to feel as if they are drowning and other parts to feel like they are in a drought.  Indiana is not a particularly large state, so it is impressive to see the extremes across such a short area.  Sometimes, these extremes can be explained from just one or two storm events that pass through, but recently it seems to be a series of events that set up this polarized pattern of precipitation winners and losers.  Figure 1 shows the 30-day accumulated precipitation presented as the percent of mean climatology for Indiana from July 21 to August 19.  Central Indiana has been experiencing dry conditions with some locations only have received 25%-50% of what they would normally receive during that time period.  In contrast, northeastern and southwestern Indiana have experienced a surplus[Read More…]