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Midwest Overview - June 2013


Rainy June for Much of the Midwest

Widespread rain totals of at least 4" fell during the month of June (Figure 1), meaning that much of the Midwest experienced June precipitation that was near to slightly above normal (Figure 2). The rainiest locations included portions of southern Wisconsin, northeast Iowa, southeast Minnesota, northern Illinois, and southern Indiana and Illinois, which received 7.5" to 12.5" throughout the month, totals which are 4" to 7" above normal. Even though much of the region received significant rainfall, some locations were 1" to 3" below normal, including northern Michigan, northern Minnesota, southern Iowa, and northern and southern Missouri. There were a few hundred daily precipitation records set throughout the month, with over 100 set on June 1st. In addition, there were 35 monthly precipitation records set and four all-time precipitation records.

Looking at statewide preliminary totals, eight of the nine Midwest states experienced above normal precipitation in June. The largest departure was in Wisconsin, where precipitation was 2.4" above normal. Iowa was the only state to experience below normal precipitation, but only by 0.07". One state ranked in its top ten for wettest June on record and that was Kentucky, which ranked 8th with 6.28" throughout the month (record high was 10.89" set in 1928).

  June 2013
      (preliminary)

Departure from Normal
(based on 1971-2000)

Illinois 5.18" +1.06"
Indiana 6.24" +1.99"
Iowa 4.55" -0.07"
Kentucky 6.28" +1.94"
Michigan 3.7" +0.47"
Minnesota 5.24" +1.19"
Missouri 4.75" +0.49"
Ohio 5.85" +1.75"
Wisconsin 6.42" +2.4"


Seasonal June Temperatures

Average June temperatures were within one degree of normal across the Midwest, with the exception of Upper Michigan, where some locations were 1°F to 2°F above normal (Figure 3). Temperatures remained close to normal throughout the month with big swings above and below normal. Overall, maximum temperatures were below normal by 1°F to 4°F across much of the region (Figure 4) while minimum temperatures were near to slightly above normal (Figure 5). There were 300 daily temperature records set throughout June, a majority of which were record low maximum temperatures and record high minimum temperatures.
 

Drought Improvement in June

Considerable rainfall during the month improved drought conditions in the region (Figure 6). Widespread rains of at least 5" in central and southern Minnesota (Figure 7), which is 1" to 3" above normal, helped eradicate drought in this part of the state. However, little precipitation in northern Minnesota meant no drought improvement throughout the month. Northern Minnesota is the only part of the Midwest that remains in drought, representing just 1% of the region. This is much different than this time last year when over 50% of the region was experiencing some level of drought (Figure 8).


Severe Weather

After a slow start to the month in terms of severe weather, severe weather reports ramped up starting on June 12th and were widespread by the end of the month (Figure 9). The major events throughout the month occurred on June 12th, 20th-21st, and 24th-25th. After a few derecho events, high wind reports were widespread throughout the region and tornadoes were reported in all nine Midwest states except Michigan and Missouri.

-MW-
The Indiana State Climate Office also contributed to this report.
The Iowa Climatology Bureau also contributed to this report.
The Kentucky Climate Center also contributed to this report.
The Missouri Climate Center also contributed to this report.