Today will be about Atmospheric Pressure.
The data at peak pressure:
Temp | Dewpoint | Pressure
14:33 UTC 56.7°F | 13.7°C 50.9°F | 10.5°C 30.04in | 017.2hPa
21:26 UTC 70.9°F | 21.6°C 53.4°F | 11.9°C 29.90in | 1012.4hPa
A steady drop in pressure of 0.14 in | 4.8hPa in 7 hours, constant for the last hour.
With the sunlight heating the ground, a local uplifting effect(convection) causes P to fall beginning at P max, decreasing throughout the day for 6 hours, with a baseline extending into the evening hours. Around sunset the behavior reverses as the Dewpoint increases, the air cools, becomes heavier with less uplift, sinks and P rises once again...Φ
Updated: 12:14 AM GMT on October 10, 2008
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