November 2013 Climate Summary

            Central Indiana
November 2013
Climate Summary
Tied for 23rd Coolest on record at Indianapolis
Tied for 79th Driest on record at Indianapolis
 
Temperatures
The fall season wrapped up on a cool note across central Indiana during the month of November. The presence of an upper level trough over the eastern part of the country for extended periods during the month enabled arctic air to expand across the Ohio Valley on several occasions. This resulted in monthly average temperatures generally from three to five degrees below normal. At Indianapolis, the monthly average temperature of 39.2 degrees is the coldest November experienced since November 1997 when the average temperature was a chilly 39.0 degrees. This month will end up tied for the 23rd coldest November on record at Indianapolis.
Seasonable air arrived in the wake of the strong storm system that impacted central Indiana on Halloween with high temperatures mainly in the 50s to near 60 degrees for the first nine to ten days of the month. The passage of a strong cold front on the evening of the 11th ushered in the first surge of arctic air for the fall, with highs plummeting into the 30s for the 12th and 13th. Overnight lows fell into the teens over much of the region on the morning of the 13th. Southerly winds brought a return to seasonable temperatures in the 50s beginning on the 14th, culminating with the warmest weather of the month on the 16th and 17th ahead of the intense low pressure system and cold front that produced the severe weather/tornado outbreak on the 17th. Temperatures soared into the middle and upper 60s on the afternoon of the 17th immediately ahead of the cold front.
Colder air returned behind the front with highs falling back into the 40s and lower 50s from the 18th through the 22nd. Another strong cold front crossed the Hoosier state on the afternoon and evening of the 22nd, ushering in the coldest air of the season with its passage. High temperatures from the 23rd through the 27th routinely struggled to make it to the freezing mark, with much of central Indiana remaining in the 20s on both the 24th and 27th. Temperatures modified slowly during the last few days of the month, with highs on the 30th reaching the lower 50s over many locations.  Beginning on the 23rd, low temperatures in the teens were common through the end of the month. The seven days with lows below 20 degrees this month at Indianapolis were the most in November since 1976 when 9 days experienced lows below 20.
Site
November 2013 Avg Temp
November 2013 Difference from Normal
Highest
Temperature
Lowest Temperature
Indianapolis
39.2
-4.4
66 on 17
13 on 24
Lafayette (*)
37.8 estimate
-5.0 estimate
67 on 17 estimate
11 on 24
Muncie
38.7
-3.9
65 on 17
13 on 24
Terre Haute (**)
39.7 estimate
-3.6 estimate
69 on 17 estimate
14 on 24
Bloomington
40.3
-3.5
68 on 17
13 on 24
Shelbyville
40.7
-3.0
67 on 17
15 on 24
Indy – Eagle Crk.
39.2
-4.8
66 on 17
14 on 24
 
At Indianapolis, there were 9 days with above normal average temperatures, 20 days with below normal average temperatures and 1 day with average temperatures.
 
November 2013 was tied for the 23rd coolest in the Indianapolis area since 1871.
(*)November 17-19 temperature data missing at Lafayette.
(**)November 16-18 temperature data missing at Terre Haute.
 
 
Precipitation

November precipitation was normal to below normal for much of Indiana. Portions of extreme north central and south central Indiana were on the wetter side. Monthly totals ranged from one inch in portions of central Indiana to more than 5 inches in extreme south central Indiana.   Most of the state received between 1.5 to 3 inches of rainfall during November. Almost all of Indiana was on the dry side through the first half of November. Only two small precipitation events occurred during this period. Rainfall of one-half to one inch fell in portions of the state from the 6th through the 7th and the 11th through the 12th. 
The largest rainfall event for the state during November was associated with the tornado outbreak of the 17th.   Rainfall prior, during and immediately following the severe storms varied from one quarter of an inch in areas of central Indiana to over 4 inches near the Ohio River in south central Indiana.
Snowfall during November was limited to northwest Indiana where totals approached 12 inches on the 11th and 12th and more than 6 inches fell on the 26th and 27th.   Much of central and southern Indiana saw flurries to about an inch of snow in November.
Rivers and streams gradually declined through the 16th.   Elevated stream levels occurred in portions of central and east central Indiana after the rains of 16th and 17th.   All local reservoirs remained at capacity during the month.
 
 
Site
November 2013 Precipitation
November 2013 Difference from Normal
Wettest Day
Longest Dry Stretch
Indianapolis
3.23
 -0.47
2.48 on 17
 4 days 7-10
Lafayette
1.90
 -1.07
0.79 on 17
 4 days 7-10
Muncie
1.81
 -1.64
1.06 on 17
 4 days 7-10 and 13-16
Terre Haute
2.80
 -1.04
1.47 on 17
 4 days 1-4 and 7-10
Bloomington
2.20
 -1.74
1.34 on 17
 4 days 7-10 and 23-26
Shelbyville
1.52
 -2.21
0.84 on 17
 4 days 7-10
Indy – Eagle Crk.
2.13
 -1.57
1.47 on 17
 4 days 7-10
                           
November 2013 was tied for the 79th driest in the Indianapolis area since weather records began in 1871.
 
 
 
 
Severe Weather
 
A significant tornado outbreak impacted the lower Great Lakes and Ohio Valley on the afternoon of November 17, including central Indiana. 15 tornadoes occurred across central Indiana, and 28 total across the Hoosier state, making November 17 the third most active tornado day in the state’s history. November 17 also became the most active tornado day in Indiana for November, nearly doubling the previous daily record of 15 tornadoes from November 22, 1992. For more information on this historic tornado outbreak and its impacts across central Indiana, please visit http://www.crh.noaa.gov/ind/?n=nov172013outbreak
 
For information on severe weather in other areas during November, visit the Storm Prediction Center “Severe Weather Event Summaries” website at http://www.spc.noaa.gov/climo/online/.
 
Miscellaneous
 
The maximum wind gust at Indianapolis International Airport was 67 mph out of the southwest on the afternoon of the 17th as an intense thunderstorm squall line passed through the area. Fog or haze was reported at Indianapolis on 9 days during the month. Thunder and dense fog were both reported on the 17th.
 
December 2013 Outlook
 
The official outlook for December 2013 from the Climate Prediction Center indicates equal chances of near, above or below normal temperatures and precipitation for central Indiana.  At Indianapolis, the average temperature for the month is 31.6 degrees. The average precipitation for December at Indianapolis is 3.17”, with 6.9” of snowfall.
  
 
Data prepared by the Indianapolis Forecast Office.


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