Press Release - Lake Level and Rainfall - July 2012
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Press Release - Lake Level and Rainfall - July 2012

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    Press Release - Lake Level and Rainfall - July 2012 Press Release - Lake Level and Rainfall - July 2012 Document Transcript

    • FOR IMMEDIATE RELEASE CONTACT: Ronda Trow July 25, 2012 (936) 588-3111 Lake Level and Rainfall – Lake Conroe, July 2012 Over the last few weeks, there have been numerous reports on the evening news of torrentialrainfall and flooding in Harris and Montgomery counties and other surrounding communities. Thesereports have caused many people to question why Lake Conroe is still two feet below normal pool level.The simple answer is that there just hasn’t been enough rainfall in the right locations. In order for rainfall to impact the lake level in Lake Conroe, it has to fall in Lake Conroe’swatershed. A watershed is the area of land that drains into a particular lake or reservoir. This area issometimes called a drainage basin. Lake Conroe has a relatively small watershed (444 square miles)compared to Lake Houston’s watershed (2,700 square miles), so rain must fall within a relatively smalltarget area to impact Lake Conroe’s water level. Lake Conroe’s watershed is located north of the Lake Conroe dam, and most of the heavy rainand flooding over the past few weeks occurred in Harris County and southern Montgomery County. Asof July 23rd, the rainfall gauge here at the Lake Conroe dam has received just over 27 inches of rainsince January 1, 2012. With an annual average rainfall of 48 inches for this part of the state, thatamount is considered to be about normal for the seven-month period from January through July.During this period of time, Lake Conroe’s water level has risen approximately 6 ½ feet. Although wemissed the majority of the heavy rains over the past few weeks, Lake Conroe did receive some rain androse approximately 8 inches. The graph below shows both lake levels and releases from Lake Conroe since January of 2010.The green line indicates releases made either from excess runoff in early 2010 or releases made to theCity of Houston in response to the exceptional “drought of record” in 2011. As the graph shows, therehave been no other releases from Lake Conroe during this period.