June 8-14, 2024

Temperatures

Average temperatures were below normal for much of the region this week (Figure 1). Most areas east of the Mississippi River averaged below normal, with the Ohio Valley being the most anomalous at 4-5°F below normal. The western end of the Iowa-Missouri border averaged 2°F above normal. Central Minnesota, central Iowa, northern Illinois, and central Missouri all averaged less than a degree from normal.

Average minimum temperatures were below normal for almost the entire region this week (Figure 2). The area near the Indiana-Ohio-Kentucky border averaged the most below normal, at 7-8°F below normal. Very small areas in northwestern Wisconsin and northeastern Minnesota may have averaged above normal, but only by 1°F. On the morning of June 11th, the ASOS station located at the Purdue University Airport recorded a minimum temperature of 38°F. That temperature broke the record for the coldest June 11th minimum temperature for that station, as it was over 21°F below normal. A Frost Advisory was issued for most of the UP of Michigan for that morning.

Average maximum temperatures varied across the region (Figure 3). The western Iowa-Missouri border was once again the warmest average, at 5-6°F above normal. Northwestern portions of both peninsulas of Michigan averaged 4-5°F below average. Eastern Minnesota, much of Wisconsin, southern Michigan, northern Indiana, northwestern Ohio, and southeastern Kentucky all averaged less than a degree from normal. A station in Youngstown, Ohio with 129 years of data measured a maximum temperature of 59°F on June 10th. This value was 19°F below normal. Five other stations across the state of Ohio, all with over 100 years of data, each measured a maximum temperature that was 15°F or more below normal that day.

Precipitation

Precipitation was much less prevalent this week than previous weeks (Figure 4). South-central Missouri received the most rainfall, coming in 300-400 percent of normal for the week. That area in Missouri and a small pocket in east-central Minnesota were the only areas in the region that received at least the normal amount of rainfall. Central Iowa, southern Indiana, eastern Kentucky, and most of Ohio received no or very little rainfall this week. A station in Springfield, Missouri with 137 years of data recorded 4.54 inches of rain this week. That station surpassed the normal amount of precipitation for the whole month of June.

Drought conditions overall remained well off this week (Figure 5). The D1 (Moderate Drought) area in the northwestern UP of Michigan was removed. This means that there is no longer D1 drought anywhere in the Midwest. Continuing the trend, D0 (Abnormally Dry) conditions have improved or been removed from northern Minnesota, northeastern Iowa, western Lower Peninsula of Michigan, and parts of Missouri. The only additions this week have been for a few patches of D0 drought in central and northern Illinois.

Severe Weather

There were 487 storm reports this week (Figure 6). Among those included 21 tornado reports, almost 200 hail reports, and over 260 wind reports.

Some of the more notable reports included softball sized (4 inch diameter) hail that fell in Glenwood, Missouri on June 13th. There were multiple tornadoes, all preliminary EF0 or EF1 strength, that were reported in Minnesota on June 12th. Severe winds also came through the Jerome, Missouri area in the early morning of June 9th. Winds destroyed a few outbuildings and took down several trees and power lines there.