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More warm and sunny weather

Simon Smith

Other than perhaps a few more clouds this afternoon, today will be another sunny and warm day with light morning winds and afternoon westerly winds in the 10 to 15 mph range with gusts to 20 mph by late afternoon possible.

High temperatures today will once again range from near 80 in town and the Tahoe shoreline, mid to upper 80s away from the lake, and lower 90s near Markleeville. Overnight lows will drop to the mid 40s to mid 50s depending on location.

So why has it been so dry for our area this summer with very few thunderstorms? The answer has to do with the orientation of the continental or four corners high and the corresponding thermal trough.

The upper level high pressure area has been generally on a northeast to southwest oriented axis, suppressed somewhat by a stronger than normal northeast Pacific low off the Queen Charlotte Islands.

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The prevailing southwest upper level flow is dry for our region during this time of year.

A high oriented in such a manner forces the surface-based thermal trough into central and eastern Nevada, where most of the thunderstorm activity has been throughout the month of July with corresponding increases in our afternoon west winds.

Remember the thermal trough is simply an area of lower pressure where air rises and converges, thus allowing thunderstorms to develop.

Until this pattern changes, our dry summer weather will continue.

— Simon Smith, a co-op weather observer for the National Weather Service in Reno, can be reached at simonsweather@yahoo.com.


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