Thursday, March 31, 2011

Very Dry La Nina Winter Here


A quick summary of March 2011 here at the house - total rainfall was 0.08" on one day. The month was mild in comparison to February. Low temperatures were 40F or below on 18 mornings and only 5 mornings had freezing or below temperatures. Coldest morning occurred on the 1st with a low 29F.
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It has been a very dry first quarter of 2011, which is not unusual for La Nina years. Total rainfall at house for 2011 - 1.13", thanks to a small convective storm on January 31st which dropped 0.76" in less than an hour, which was the total rainfall for the month. During 2011 there have been only 4 days with rainfall - or a daily observed POP of 4%. The first half of the water year (the water year begins October 1st) has produced only 3.20" of precipitation here at house - but we're somewhat wetter than will be the official records taken at the airport. The latest drought monitor data - see figure above - indicates that southeastern Arizona is suffering extreme drought conditions.

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