Courtesy: Reno National Weather Service.

Courtesy: Reno National Weather Service.

Clear skies and no moon should make for great viewing of the Perseid Meteor Shower (best viewing after midnight the next two nights). An offshore low pressure center will keep us in a dry and stable southwest flow creating a lot of sunshine (with an occasional high cloud) and temperatures that will be seasonably warm near 90 degrees into the weekend, and will creep up into the mid-to upper 90s by the first of next week. The biggest weather danger comes from dry air and breezy conditions on Thursday putting us under a Fire Weather Watch that day.

Barometer 2

When you move your barometer from one place to another, you need to calibrate it to account for changes in elevation. Barometric pressure is by definition the air pressure corrected to sea level. The actual air pressure here in the high desert is about 25.50” of mercury. Going down to sea level would add about three and a half inches of pressure. For horizontal changes in pressure to have any meteorological meaning, you need to have a fixed horizontal datum line (sea level.) So an altitude correction is always included to get the barometric pressure. Just set your barometer to match a nearby calibrated barometer and you are good to go.

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