June 2013 Climate Summary

Central Indiana
June 2013
Climate Summary
Tied for 71st Warmest on record at Indianapolis
69th Driest on record at Indianapolis
June started off slightly cooler than normal but quite pleasant, as highs largely remained in the 70s. In the wake of a cold frontal passage, much of central Indiana fell into the middle and upper 40s on the morning of the 3rd, with several locations not making it out of the 60s for highs that day. For much of the region, the 3rd would be the coolest day of the month. Temperatures warmed over the next several days, with highs ranging from the middle 70s to lower 80s common across the area through the 10th.
Beginning on the 11th, warm and humid air expanded north into the Ohio Valley as a warm front lifted into the Great Lakes. Temperatures surged into the 80s, culminating with sultry highs in the upper 80s and lower 90s on the afternoon of the 12th. The passage of a cold front early on the morning of the 13th would bring a drier and slightly cooler airmass back south across the region with highs settling into the lower and middle 80s through the 20th as central Indiana enjoyed a predominantly dry stretch of weather with high pressure in place.
A warm front shifted north into the Great Lakes on the 21st as a large upper ridge developed across the central Plains. With southerly winds pumping warm, moist air into the Ohio Valley, high temperatures once again rose into the middle and upper 80s, with a few locations even making it into the lower 90s, through much of the remainder of the month with a noticeable rise in the humidity levels.  Scattered thunderstorms were a daily occurrence across central Indiana through the 28th, then became more numerous as an upper level low pressure system meandered across the Ohio Valley on the 29th and 30th. High temperatures fell back into the lower and middle 70s for the last two days of the month as clouds and rainfall were in abundance across the region.
The Indianapolis International Airport failed to reach 90 degrees in June for the first time since June 2006, and remained in search of its first 90-degree day of the year. By the end of June in 2012, Indianapolis had already made it to 90 degrees on 15 days.
June 2013
Avg Temp
June 2013 Difference from Normal
Lowest Temperature
89 on 25 and 27
48 on 3
90 on 12
45 on 3
91 on 12
46 on 3 and 4
Terre Haute
92 on 12
49 on 4
91 on 12
48 on 4
93 on 12
50 on 3
Indy – Eagle Crk.
88 on 22 and 25
46 on 3
At Indianapolis, there were 10 days with below normal average temperatures, 16 days with above normal average temperatures and 4 days with normal average temperatures.
June 2013 was tied for the 71st warmest in the Indianapolis area since 1871.
(*) – Shelbyville low temperature missing on June 4.

Below is a comparison of conditions outside the NWS office on June 28, 2012 (left) and June 28, 2013 (right) 

Comparison of June 28 2012 and the same day in 2013

June was on the dry side for much of Indiana for the first three weeks of the month, but turned wetter during the last third of the month.  Daily showers and thunderstorms occurred across various portions of the state beginning on the afternoon of the 21st and continuing through the end of the month. At times, torrential downpours produced localized flooding or flash flooding in portions of central and southern Indiana on the 21st, 22nd, 23rd, 24th, and 26th. Additional thunderstorms brought soaking rains and localized flash flooding to parts of central Indiana on the 29th and 30th as an upper level low pressure system developed over the Ohio Valley.
The largest rain event during June occurred in southwest and south central Indiana. In a 24 hour period from the evening of the 25th through the evening of 26th, torrential rains of 3 to nearly 8 inches fell. Flash flooding quickly transitioned into low land river flooding along portions of the Lower White and Wabash Rivers. Overall monthly rainfall totals for June ranged from around 3 inches in Johnson County in central Indiana to more than 10 inches in portions of Greene, Clay, Sullivan, Vigo, Knox and Martin Counties of west central and southwest Indiana. This was the third consecutive month where portions of Indiana received at least 10 inches of rain.
River flooding was frequent during June. River flooding began at the very beginning of June along portions of the Wabash, Tippecanoe and White Rivers following rainfall of 3 to more than 6 inches during end of May and beginning of June in western and northern Indiana. This river flooding ended by the 11th. River flooding returned again on the 13th to portions of the Tippecanoe and Wabash River. Rainfall of 2 to nearly 6 inches occurred in north central and east central Indiana from the 9th through the 13th. The White River in central Indiana approached bank full levels following this rain. River flooding along the Wabash ended by the 22nd.

The last river flood event of June began swiftly along the lower reaches of the White and Wabash Rivers following the flash flooding during the evening of the 26th. This was the third time during June that the Wabash River in the Hutsonville, Illinois and Riverton Indiana area flooded. The flood along the White River in southwest Indiana was the highest since April. River flooding continued into early July along portions of the lowest reaches of the White and Wabash Rivers in southwest Indiana.




June 2013 Precipitation
June 2013 Difference from Normal
Wettest Day
Longest Dry Stretch
1.43 on 23
5 days 17-21
0.91 on 21
4 days 17-20
1.63 on 13
6 days 17-22
Terre Haute
1.78 on 26
4 days 11-14
1.73 on 26
5 days 11-15
1.73 on 30
4 days 2-5
Indy – Eagle Crk.
1.68 on 23
5 days 17-21
June 2013 was the 69th driest in the Indianapolis area since weather records began in 1871.
(*) – Bloomington precipitaton missing on June 28, 29 and 30.
Severe Weather
June got off to a stormy start right away as a weakening squall line moved across the western part of central Indiana during the early morning of the 1st, producing sporadic wind damage. A large thunderstorm complex impacted much of the northern part of central Indiana during the late evening and early morning of the 12th and 13th ahead of a strong cold front. The storms predominantly produced damaging winds and torrential rainfall. There were a few reports of large hail as well. Isolated severe thunderstorms affected southern portions of central Indiana during the early evening of the 18th.
During the morning and afternoon of the 21st, a large thunderstorm complex moved from the upper Mississippi Valley southeast into the southern Wisconsin and northern Illinois, producing severe weather and flooding. The complex gradually weakened as it tracked into the northern Wabash Valley during the evening, producing gusty winds to the northwest of Indianapolis before it diminished. This would be the start of an active period for central Indiana, with rain and thunderstorms impacting portions of the area for the rest of the month. The region remained on the fringe of a strong ridge aloft centered over the central Plains with scattered thunderstorms developing as upper level waves tracked along the periphery of the ridge and across the Ohio Valley. The development of an upper low across the region by the end of the month continued the daily threat for rain and thunderstorms. Isolated to scattered severe thunderstorms impacted central Indiana each afternoon and evening from the 22nd through the 27th.  To read more about the severe weather and flooding during this time period, please visit http://www.crh.noaa.gov/ind/?n=june232613severe.
As the upper low developed across the Ohio Valley during the last few days of the month, thunderstorms became more widespread. On the afternoon of the 29th, several cold air funnels developed in the vicinity of showers and thunderstorms.
For information on severe weather in other areas during June, visit the Storm Prediction Center “Severe Weather Event Summaries” website at http://www.spc.noaa.gov/climo/online/.
The maximum wind gust at the Indianapolis International Airport was 55 mph from the southwest on the afternoon of the 23rd as intense thunderstorms impacted the western part of the Indianapolis metro area.  Hail was also reported at the airport from this storm. Fog or haze was reported at Indianapolis on 14 days this month, with dense fog occurring on the 17th, 23rd and 27th. Thunder was reported at Indianapolis on eight days this month.
July 2013 Outlook
The official outlook for July 2013 from the Climate Prediction Center indicates an equal chance for above normal, normal, or below normal temperatures across central Indiana.  At Indianapolis, the average temperature for the month is 75.4 degrees. The outlook also calls for a slightly higher chance for above normal precipitation. The average precipitation for July at Indianapolis is 4.55”.  
Data prepared by the Indianapolis Forecast Office.

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