November 2012 Climate Summary

Central Indiana
November 2012
Climate Summary
50th Coolest on record at Indianapolis
15th Driest on record at Indianapolis
 
Temperatures
November started out cool as a trough of low pressure persisted across much of the eastern U.S. in the wake of Sandy. An upper level ridge expanded into the Ohio Valley during the second week of the month, with much warmer temperatures across central Indiana. From the 9th through the 11th, highs rose to 60 degrees or better across much of the region, highlighted by temperatures reaching the lower 70s in most locations on the 10th. The passage of a strong cold front early in the morning of the 12th brought an abrupt end to the warm weather. Highs in the upper 50s and lower 60s were reached shortly after midnight, with temperatures quickly falling 15 to 20 degrees within a couple hours after the frontal passage. Temperatures fell into the upper 30s after daybreak on the 12th, with precipitation changing over to a brief period of snow for most of central Indiana.
Temperatures remained slightly below normal through the 15th, before temperatures warmed. The arrival of a broad area of high pressure with ridging aloft brought an eight day stretch of daytime temperatures exceeding 50 degrees. The warmest temperatures were experienced on the 21st and 22nd as much of central Indiana warmed into the lower and middle 60s. Yet another strong cold front passed through the region early on the 23rd, bringing much colder air back into the Hoosier state. Temperatures on the 24th under cloudy skies were only able to warm into the lower 30s, making for the coldest daytime highs experienced across the region since mid-February. Temperatures slowly warmed through the end of the month, with central Indiana returning into the 50s by the 30th. Lows in the 20s and 30s were typical throughout much of the month.
Site
November 2012     Avg Temp
November 2012 Difference from Normal
Highest
Temperature
Lowest Temperature
Indianapolis
41.4
-2.2
72 on 10
23 on 24 and 28
Lafayette
39.7
-3.1
70 on 10
20 on 27
Muncie
40.6
-2.0
69 on 10
23 on 14 and 15
Terre Haute
42.5
-0.8
72 on 10
23 on 28
Bloomington
40.8
-3.0
73 on 10
20 on 29
Shelbyville
41.8
-1.9
71 on 10
24 on 24 and 28
Indy – Eagle Crk.
40.8
-3.2
72 on 10
23 on 29
 
At Indianapolis, there were 11 days with above normal average temperatures, 18 days with below normal average temperatures and 1 day with average temperatures.
 
November 2012 was the 50th coolest in the Indianapolis area since 1871.
 
 
Precipitation

November was a dry month across Indiana. Monthly precipitation totals ranged from a record low amount of one-quarter of an inch in portions of northern Indiana to nearly 3 inches in southeast Owen County in southwest Indiana. Most areas received between one-half and one and one-half inches of precipitation during the month. November was the first drier than normal month for central Indiana since July.
The only widespread precipitation event during November occurred late on the 11th and the morning of the 12th. Much of central Indiana received one-half to one and one-half inches of precipitation while northern Indiana received less than one-half of an inch. Rain changed to snow in central Indiana during the late morning of the 12th. This resulted in the first measurable snowfall of the season for much of central Indiana. Snowfall accumulations were less than one-half of an inch. The snow quickly melted from the sunshine in the early afternoon.
Wintry precipitation fell on two other occasions during November. Sleet fell in portions of central Indiana on the 3rd. Late on the 26th and early on the 27th, light snow accumulated up to an inch in a 20-mile wide area from Lafayette to Winchester north of Indianapolis. All wintry precipitation melted within a few hours. Wintry precipitation totals for the month ranged from a trace to one and one-half inches.
Drought conditions did not improve in northern Indiana during November. The U.S. Drought Monitor indicated about 15% of Indiana remained in a moderate drought at the end of November. Stream flow ranged from seasonal levels in much of central Indiana to below normal in northern and southern Indiana. Local area reservoirs remained near or at capacity.
 
 
Site
November 2012 Precipitation
November 2012 Difference from Normal
Wettest Day
Longest Dry Stretch
Indianapolis
1.33
 -2.37
0.90 on 12
 6 days 13-18
Lafayette
0.80
 -2.17
0.48 on 12
 6 days 13-18
Muncie
0.92
 -2.53
0.77 on 12
 7 days 13-19
Terre Haute
0.52*
 -3.32
0.23 on 3
 9 days 13-21
Bloomington
1.36
 -2.58
0.77 on 12
 9 days 13-21
Shelbyville
0.62
 -3.11
0.50 on 12
 7 days 13-19 and 24-30
Indy – Eagle Crk.
1.34
 -2.36
0.88 on 12
 7 days 13-19 and 24-30
                           
November 2012 was the 15th driest in the Indianapolis area since weather records began in 1871.
*November 11 and 12 precipitation data missing at Terre Haute.
 
 
 
Severe Weather
 
No severe weather occurred across central Indiana during the month of November.
 
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 46 mph out of the west on the 23rd after the passage of a strong cold front. Fog or haze was reported at Indianapolis on 16 days during the month, with dense fog reported on the 8th.
 
December 2012 Outlook
 
The official outlook for December 2012 from the Climate Prediction Center indicates a greater chance of above normal temperatures for central Indiana.  At Indianapolis, the average temperature for the month is 31.6 degrees. The outlook also calls for a greater chance of above normal precipitation. 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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