October 2013 Central Indiana Climate Summary

                Central Indiana
October 2013
Climate Summary
57th Coolest on record at Indianapolis
12th Wettest on record at Indianapolis
Overall the month of October averaged near normal for most of central Indiana, but most individual days were not normal. The first half of the month was above average, continuing the trend that started in late September.
The first 5 days of the month were well above normal, with departures over 10 degrees above normal common across the area. A cold front brought a brief cool down on the 6th and 7th, but warmer readings returned for the 8th through the 15th. The days were not as warm as earlier in the month but still above average.
A significant change in the weather pattern occurred mid-month, with most remaining days in the month seeing well below normal temperatures. Cold air from Canada flowed into central Indiana during this period, with readings bottoming out around the 25th of the month with low temperatures in the middle to upper 20s. This provided a widespread hard freeze to the area.
The last couple of days of the month saw a return to above average temperatures as warmer air flowed in ahead of a potent storm system.
October 2013     Avg Temp
October 2013 Difference from Normal
Lowest Temperature
82 on 3 and 4
26 on 25
83 on 4
25 on 22 and 27
82 on 4
28 on 25
Terre Haute
84 on 3
25 on 25
82 on 3
27 on 25 and 28
85 on 4
28 on 25
Indy – Eagle Crk.
81 on 3 and 4
29 on 25
Some temperature data for Lafayette was not available on October 24. Temperature data for Shelbyville was not available on October 1.

At Indianapolis, there were 14 days with above normal average temperatures, 16 days with below average temperatures, and1 day with average temperatures.
October 2013 was the 57th coldest in the Indianapolis area since 1871.

October precipitation was normal to above normal for all of Indiana.   Monthly totals ranged from 2½ inches in portions of northwest Indiana to more than 10 inches in southern Indiana.   Most of the state received between 3 to 6 inches of rainfall during October.
There were two significant rainfall events during the month. The first occurred on the 5th-6th when central and southern Indiana received 1½ to more than 7 inches of rain. The heaviest rainfall occurred in southern Indiana. This precipitation ended any drought conditions in central and southern Indiana south of I-70.
The second big rain event occurred more than three weeks later when the entire state received 1 to more than 4 inches of rainfall from the 29th through the 31st.  The largest amounts were in northwest, central and southern Indiana. This rain improved remaining abnormally dry conditions in central and northern Indiana.
The autumn season’s first measurable winter precipitation occurred in central Indiana on the 23rd.   Snowfall amounts ranged from a trace to over an inch in east central Indiana. Any accumulated snow melted quickly after sunrise. Small ice pellets and snow also fell during the evening of the 23rd and the day of the 24th in portions of central and south central Indiana.
Rivers and streams showed little response to the rainfall on the 5th and 6th, but heavy rainfall during Halloween caused localized flooding and elevated streams levels in west central and central Indiana. All local reservoirs returned to capacity following the end of the month rains. 
October 2013 Precipitation
October 2013 Difference from Normal
Wettest Day
Longest Dry Stretch
2.01 on 31
 7 days 8-14
1.51 on 31
 7 days 8-14
1.28 on 6
 5 days 8-12, and
Terre Haute
2.42 on 31
 7 days 8-14
2.45 on 6
 7 days 8-14
1.34 on 6
 7 days 8-14
Indy – Eagle Crk.
2.24 on 31
 7 days 8-14
 Precipitation data for Shelbyville was not available on October 1
October 2013 was the 12th wettest in the Indianapolis area since weather records began in 1871.
Severe Weather
Severe weather occurred on October 31st across much of central Indiana as a potent storm system moved through the area. A line of showers and thunderstorms moved across the area during the evening, bringing damaging winds. These winds brought down trees and power lines. In addition, heavy rain caused minor flooding issues to parts of the area. For more information, please see the following web page:
For information on severe weather in other areas during October, visit the Storm Prediction Center “Severe Weather Event Summaries” website athttp://www.spc.noaa.gov/climo/online/.
The maximum wind gust at Indianapolis International Airport was 58 mph out of the southwest on the 31st as a line of showers moved through. Fog or haze was reported at Indianapolis on 20 days during the month. Thunder was reported on 2 days during October.
November 2013 Outlook
The official outlook for November 2013 from the Climate Prediction Center indicates equal chances for above, near, or below normal temperatures for central Indiana.  At Indianapolis, the average temperature for the month is 43.6 degrees. The outlook also calls for above normal precipitation. The average precipitation for November at Indianapolis is 3.70”.
Data prepared by the Indianapolis Forecast Office.

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