• Category Archives NWS
  • NWS- Indianapolis: July 2014 Coolest On Record

    The following information was written by the fine folks over at the Indianapolis National Weather Service office.  July 2014 was coolest on record at Indianapolis.

    July 2014 Climate Summary – Coolest on Record at Indy

    Central Indiana
    July 2014
    Climate Summary

    *COOLEST ON RECORD at Indianapolis*

    66thDriest on record at Indianapolis

    Temperatures

    A strong cold front passed through central Indiana on the 1st, ushering in a cool and dry airmass that lasted across the region through most of the holiday weekend that followed. High temperatures remained in the 70s for most locations through the 5th. A modest warming trend developed during the following week as high temperatures rose consistently into the lower and middle 80s, warmer but still below normal for early July.

    The passage of yet another strong cold front by July standards and the return of an upper level trough brought another stretch of cooler weather to the Hoosier state beginning on the 15th as some locations across northern portions of central Indiana were unable to rise out of the 60s. Highs over the next five days generally stayed below 80 degrees. A surge of warmer and more humid air arrived with an upper level ridge beginning on the 20th and culminating on the 22nd with the warmest high temperatures of the month, ranging from the upper 80s to around 90 degrees. The passage of yet another cold front on the 23rd brought highs back down, alternating between the 70s and lower to mid 80s through the remainder of July. Low temperatures alternated through the 50s and 60s through the month, with only one night, the 13th, remaining above 70 degrees.

    For Indianapolis, the first 90 degree day of the year remained elusive. The city came closest to hitting it on the 22nd, when the temperature officially topped out at its warmest high of the month, 88 degrees. This marked the coolest max daily high temperature for July since 2000 when the warmest high only made it to 87 degrees.

    Overall, the temperature statistics at Indianapolis provided a stark contrast to just two years ago when Indianapolis experienced their warmest July on record. The average temperature of 70.1 degrees was good for the coolest July on record, a half degree cooler than the previous record from July 1947, and almost a whopping 14 degrees cooler than our blistering July in 2012. High temperatures remained below 80 degrees for a record 16 days during the month, breaking the old mark of 14 days with sub-80 degree highs from July 2009. Even more amazing, high temperatures made it at or above 85 degrees on just 5 days this month. Low temperatures fell below 60 degrees on 13 days this month, the most sub-60 degree lows in July since 1979 (11).

    Site

    July 2014 Avg Temp

    July 2014 Difference from Normal

    Highest

    Temperature

    Lowest Temperature

    Indianapolis

    70.1

    -5.3

    88 on 22

    52 on 29

    Lafayette

    68.3

    -6.3

    86 on 7 and 22

    49 on 4

    Muncie

    69.1

    -5.3

    88 on 22

    47 on 29

    Terre Haute

    69.8

    -5.2

    88 on 22

    50 on 25

    Bloomington

    69.6

    -4.3

    88 on 13 and 22

    51 on 17 and 25

    Shelbyville

    71.1

    -3.0

    90 on 22

    50 on 17

    Indy – Eagle Crk.

    69.7

    -5.5

    87 on 22

    53 on 4 and 17

    At Indianapolis, 4 days had above normal average temperatures, 26 days below normal temperatures and 1 day was at normal.

    July 2014 was the coolest in the Indianapolis area since 1871.

     

    Precipitation

    July rainfall was above normal in southern Indiana and below normal in northern Indiana. Monthly totals generally measured 1 to 4 inches north of a Terre Haute to Liberty Indiana line in central and northern Indiana to 3 to more than 6 inches south of this line in southern Indiana. Much of the state received between 2 and 5 inches of rain during July.

    The wet areas of June dried out during July as rain became more sporadic especially in northern Indiana. Showers and thunderstorms during the 1st-3rd, 7th-8th and 12th-14thdropped from a few hundredths to over 3 inches of rain for each event. A dry period set in beginning on the 13th in northern Indiana and on the 15th in central and southern Indiana and continued through the 23rd. In northern Indiana, the dry period persisted for the remainder of July in several areas.

    Rains returned to central and southern Indiana beginning on the 23rd. Rainfall of 1 to nearly 3 inches fell in much of the Indianapolis metropolitan area on the 23rd and caused minor flooding along Pleasant Run on the east side of Indianapolis. Local flooding occurred in Jackson and Jennings Counties following 2 to more than 3 inches of rainfall on the 26th and 27th. This was the only flooding during July.

    Previously, the Wabash River reached bankfull levels from Montezuma to Riverton in west central Indiana as a result of rains at the very end of June and beginning of July. After the 5th, the rivers in central Indiana remained below bankfull levels.

     

    Site

    July 2014 Precipitation

    July 2014 Difference from Normal

    Wettest Day

    Longest Dry Stretch

    Indianapolis

    3.10

    -1.45

    1.61 on 23

    8 days 15-22

    Lafayette

    3.99

    +0.02

    0.75 on 29

    8 days 15-22

    Muncie

    2.13

    -2.25

    1.23 on 8

    4 days 15-18

    Terre Haute

    2.41

    -2.38

    0.76 on 7

    8 days 15-22

    Bloomington

    3.75

    -1.14

    1.41 on 14

    8 days 15-22

    Shelbyville

    3.53

    -1.18

    1.75 on 23

    8 days 15-22

    Indy – Eagle Crk.

    3.09

    -1.17

    1.09 on 23

    8 days 15-22

     

    July 2014 was the 66th driest in the Indianapolis area since weather records began in 1871.

     

    Severe Weather

    It didn’t take long for severe weather to impact central Indiana in July, with a line of storms producing damaging winds impacted the region just an hour or two into the new month. Indianapolis International Airport reported a 71 mph wind gusts as these storms moved into the metro area early on the morning of the 1st. Additionally, a warehouse was significantly damaged just off US Route 36 in Avon, and scattered storefront damage occurred at a strip mall across from the Greenwood Mall.

    Scattered severe storms produced wind damage across west central and south central Indiana on the afternoon and evening of the 7th. A 75 mph wind gust was recorded near Brazil in Clay County as these storms passed. A microburst occurred in Carmel on the north side of Indianapolis on the morning of the 8th as thunderstorms along a cold front passed through the region. Thunderstorms again produced scattered wind damage across the region on the afternoon of the 14th.

    Several clusters of thunderstorms on the 26th and 27th produced scattered large hail and wind damage across the region. A complex of storms tracking from west central Indiana southeast to near Seymour produced sporadic large hail on the morning of the 26th. An additional complex of thunderstorms moved almost over the exact same area early on the morning of the 27th, producing wind damage in a few spots from near Clinton in Vermillion County to west of Spencer in Owen County. Finally, a broken line of storms formed along a cold front during the late afternoon of the 27th. The strongest of the storms along the line produced pockets of wind damage from near Clayton to Mooresville across Hendricks and Morgan Counties.

    For information on severe weather in other areas during July, visit the Storm Prediction Center “Severe Weather Event Summaries” website athttp://www.spc.noaa.gov/climo/online/.

     

    Miscellaneous

    The maximum wind gust at the Indianapolis International Airport was 71 mph from the northwest on the early morning of the 1st as an intense thunderstorm moved through Indianapolis. Fog or haze was reported at Indianapolis on 15 days this month. Thunder was reported at Indianapolis on 9 days in July.

     

    August 2014 Outlook

    The official outlook for August 2014 from the Climate Prediction Center indicates a greater chance for below normal temperatures. At Indianapolis, the average temperature for the month is 74.2 degrees. An equal chance of above, below or near normal precipitation is expected. The average precipitation for Indianapolis is 3.13”.

     

    Data prepared by the Indianapolis Forecast Office.