As opposed to last June, when abnormally hot and dry weather caused rapid development of drought conditions, June 2013 featured near normal temperatures and wetter than normal conditions.
|Much of the Midwest saw rainfall well above normal for June (click image at left to enlarge). The only real exceptions in Illinois were in areas west of Galesburg, and also north of Lacon. Southeast Illinois was especially hard hit, with many areas south of I-70 receiving at least 10 inches of rain. At Flora, a total of 12.63 inches was observed during the month, breaking the June record of 10.33 inches set in 2011. Near Clay City, a total of 9.16 inches broke the old record of 8.52 inches set in 1997, and Olney's total of 8.70 inches was the 3rd wettest June on record. Below are rainfall accumulation graphs for Flora, Olney, and the Lawrenceville airport (click to enlarge).|
Further north, heavy rain developed from Peoria northward early on the 24th. Accumulations of 5-6 inches were reported near Toulon, with the west side of Peoria reaching 5.75 inches, 5.15 inches in Germantown Hills, and 5.10 inches at Dunlap, causing flash flooding. The heavy rain caused a sinkhole to develop near a runway at the Mount Hawley Auxiliary Airport. However, the Peoria airport only reported half an inch from the storm.
June started out with cooler than normal temperatures over a large part of the Midwest. In central Illinois, lows fell into the mid to upper 40s along and north of I-74 on the 4th. However, temperatures started warming up again as mid-month approached. By the 12th, high temperatures were well into the 90s, with record highs tied at Minonk (96 degrees) and Springfield (95 degrees), and set at Morrisonville (95 degrees). While temperatures cooled a bit for the rest of the month, humidity levels were on the increase, especially from the 21-28th.
Severe thunderstorms started to become more common later in the month. While a major severe weather outbreak stayed just to the north on the 12th, reports of severe weather were scattered over the area on the 17-18th, and from the 21-25th. These reports generally consisted of damaging winds or large hail, and were most numerous on the 24-25th. Golfball size hail was reported on the 24th in Astoria (Fulton County) and Oakley (Macon County). On the 29th, several funnel clouds were reported near Decatur, Champaign, Mattoon, and Arthur, mostly due to weak boundaries and cold air aloft, with one reportedly touching down in Douglas County, causing minor damage near Cooks Mills.
Links below are the monthly climate summaries for area cities. Only the summaries for Peoria, Springfield and Lincoln are considered "official", meaning they are the station of record for their respective locations. The other summaries are "supplemental", meaning another location in the area is the official climate station for that city.
Climate data for other area cities is available at http://www.nws.noaa.gov/climate/xmacis.php?wfo=ilx