Wednesday, March 31, 2010

March Ends with Dust in the Air

View looking south from Kitt Peak this afternoon shows some blowing dust in the boundary layer, but nothing like yesterday's dust event across the Great Basin and into Salt Lake City.
Strong, short-wave trof at 500 mb will cross the state tomorrow with an intense vorticity maximum. A leading S/W will pull rapidly northward across the state during the early morning hours carrying several embedded vorticity maxima with it. So, April begins with another strong and complex storm crossing Arizona and good chances for convective storms and precipitation across most of the state.
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March summary here at house - north central Tucson near the Rillito Wash.
Rainfall for month 0.88". This makes a first quarter, Jan - Mar, total of 6.62". Many cool mornings during the month with 21 days having lows below 40F and 7 days with 32F or lower - heavy frost and 27F on morning of the 10th.
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The NWS FD this afternoon notes that TUS observation site at the airport has not had a low temp of 32F or below since December 27th. This fact highlights the strong local temperature variance within the city limits when compared with the lows here. Since Decmber 27th there have been 34 mornings with temperatures of 32F or lower. Coldest morning since the 27th of December was 24F on January 1st.
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Off to Chicago in the morning - back here next Tuesday.

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