Archive for October, 2010

2009-2010 Water Year Summary

Sunday, October 3rd, 2010

Definition of water year courtesy CoCoRaHS:

Hydrologists and climatologists often use the “Water Year” calendar for tracking water resources. While the definition may vary regionally, a common definition of “water year” is October 1 through September 30th. In the cool months, evaporation rates are very low, snow accumulates in cold regions, storms tend to be widespread, and most areas see accumulation of moisture in the soil. Then comes spring with it’s accompanying snow melt and high runoff from mountainous regions and higher latitudes. The summer months bring high evaporation rates. Precipitation (much from thunderstorms) becomes much more localized. Soil moisture may be gradually depleted during summer as vegetation uses large volumes of water. Streams run slower and clearer.

Here is the water year summary for our CoCoRaHS station IL-GY-1

Month Daily Report Count Total Pcpn Days With Pcpn Days w/Trace
Oct 2009 31 7.79 18 2
Nov 30 1.67 9 2
Dec 31 3.24 15 5
Jan 2010 31 1.13 8 7
Feb 28 1.25 9 5
March 31 2.81 11 2
April 30 2.74 11 3
May 31 4.52 14 1
June 30 6.43 18 2
July 31 3.79 9 1
Aug 31 3.35 11 2
Sept 30 3.44 14 2
Water Year Totals: 365 reports 42.16″ 147 days 34 days

Snow Data:

Month Total Snowfall Days Snowfall Days Snow On Gnd
Oct 0 0 0
Nov 0 0 0
Dec 14.2 13 16
Jan 6.8 4 29
Feb 11.8 11 21
March 0 0 0
April 0 0 0
May 0 0 0
June 0 0 0
July 0 0 0
Aug 0 0 0
Sept 0 0 0
Water Year Totals: 32.8″ 28 days 66 days

September 2010 Climate Summary

Sunday, October 3rd, 2010

Although it would appear by the numbers that September rain was near normal at 3.44 inches, most of the the precip fell during the first few days of the month. We only recorded two days with 1/2 inch or more of rain. Soil moisture is quite low although the dry and pleasant weather I’m sure is welcomed by area farmers especially after a very wet fall last year.

Averages\Extremes for the month of September 2010

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 Average temperature     = 65.5°F
 Average humidity        = 77%
 Average dewpoint        = 57.1°F
 Average barometer       = 29.951 in.
 Average windspeed       = 2.1 mph
 Average gustspeed       = 4.6 mph
 Average direction       = 254° (WSW)
 Rainfall for month      = 3.44 in. 
 Maximum rain per minute = 0.050 in on day 02 at time 19:28
 Maximum temperature     = 90.1°F on day 23 at time 14:07
 Minimum temperature     = 41.8°F on day 27 at time 05:04
 Maximum humidity        = 100% on day 22 at time 09:37
 Minimum humidity        = 36% on day 28 at time 16:33
 Maximum dewpoint        = 75.8°F on day 02 at time 14:29
 Minimum dewpoint        = 40.7°F on day 27 at time 5:04
 Maximum pressure        = 30.20 in. on day 18 at time 11:23
 Minimum pressure        = 29.70 in. on day 24 at time 03:43
 Maximum windspeed       = 13.8 mph from 225°( SW) on day 23 at time 16:59
 Maximum gust speed      = 31.1 mph from 248°(WSW) on day 02 at time 19:25
 Maximum heat index      = 96.3°F on day 21 at time 13:14
 Avg daily max temp :77.7°F
 Avg daily min temp :54.3°F
 Total windrun = 1506.2miles