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• EXHIBIT K -CLIMATE INFORMATION <br />The approximate average annual temperature is 53°F, average annual precipitation is 11.9 <br />inches, and the frost-free season is around 175 days. At least 75 percent of the possible <br />sunshine is received in all months. There is little or no tornado activity of consequence. <br />Warm, moist air from the south moves into Pueblo County most frequently in spring, <br />bringing the heaviest rainfall of the year. There are frequent showers and thunderstorms <br />until well into summer. The average growing season is 167 days. The last freeze in spring <br />generally occurs on April 29 and the first freeze in the fall on October 13. Table K-1 <br />summarizes climate data collected from the site in 1998 and 1989. <br />In spring, the average daily maximum temperature ranges from the mid SOs to the mid <br />70s. The average daily minimum temperature Ganges from the mid 20s to the high 40s. <br />Heavy accumulations of snow at the higher elevations in winter followed by rapid <br />warming in spring may cause minor flooding. <br /> <br />The maximum summer temperature reaches 90°F or more on about 30 percent of summer <br />days. Summer nights are invariably cool because of the elevation. Mountain breezes <br />usually prevail from just after sunset to about noon the next day. The average daily <br />maximum temperature ranges from the mid 80s to the low .90s. The average daily <br />minimum temperature ranges from the mid SOs to the low 60s. The survey area receives <br />its hottest weather of the year when there is an inflow of air from the southwest. These <br />periods of higher temperatures are usually of short duration. In summer, noon relative <br />humidity is about 35 percent. The prevailing wind is from the southeast at about 9 miles <br />per hour. Most of the precipitation in the survey area is received during the growing <br />season. Thunderstorms occur on an average of about 35 days during the summer. <br />In fall, cold air from the north begins to move into the area with increasing frequency and <br />often results in a sudden drop in temperature. The average daily maximum temperature <br />ranges from the mid SOs to the low 80s. The average daily minimum temperature ranges <br />from the high 20s to the low SOs. Little precipitation is received during fall. <br />Winter is usually mild because of the abundance of sunshine and the protection afforded <br />by the nearby mountains. Cold air from the north does invade the area, and blizzards <br />occasionally occur in Pueblo County. These cold spells usually last 3 to 5 days, when <br />they are often ended by Chinook winds. The rise in temperature is the result of three <br />factors acting together: the replacement of a cold air mass by the advection of warmer air, <br />dynamic heating by subsidence, and the destruction of the normal night ground inversion. <br />As a rule, less precipitation is received in winter than in fall. Strong winds occur <br />frequently in winter and spring. After an unusually dry winter, dust storms may occur, <br />particularly in dryfarming areas. The prevailing wind is from the west at about 8 miles <br />per hour. The relative humidity at noon is about 45 percent. <br />AppExbibi~sA-T-APP(1180)RevB/lanuary 17, 2002 K_l <br />