How are barometric readings interpreted with regards to weather patterns and/or changes?
2007-04-19 04:32:35 · 2 answers · asked by Josemaria G 1 in Environment
Low pressure indicates a storm system, while high pressure indicates fair weather. The change in barometric pressure indicates which way the weahter is trending. Falling pressure means that a storm may be on the way in, while rising pressure means you can expect clear skies soon.
The most severe cyclones (typhoons, hurricanes, etc.) may have pressures as low as 900 mbar or 26 inches of mercury. A more typical storm on land has pressures in the vicinity of 980 mbar or 29 in Hg. A typical nice day has pressure slightly above 1000 mbar, or about 30 in Hg. The highest atmospheric pressure ever measured on the surface of the Earth was over 1080 mbar, or 32 in Hg, but that's quite exceptional.
2007-04-19 05:30:40 · answer #1 · answered by DavidK93 7 · 0⤊ 0⤋
If it's one of the usual "banjo" shaped barometers. Turn the knob in the middle of the glass so the movable hand lines up with the indicator hand. Then, gently tap the glass, a couple of times, so that the indicator hand moves to a new position (or not). The indicator will now show the current atmospheric pressure. The position of the indicator hand compared to the moveable hand shows whether it's gone up or down (assuming that you didn't notice the hand move).
2016-05-18 23:05:54 · answer #2 · answered by migdalia 3 · 0⤊ 0⤋