Pressure question

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JonathanBelles
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Pressure question

#1 Postby JonathanBelles » Thu Jan 24, 2008 3:02 pm

Just looking at the surface map and I see that there is a 1017 LOW in the GOM, and a 1016 HIGH in Canada. How is the pressure of the high lower than the low?
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Cyclone1
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#2 Postby Cyclone1 » Thu Jan 24, 2008 4:00 pm

Probably has to do with the ambient pressure.
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#3 Postby senorpepr » Fri Jan 25, 2008 1:33 pm

Exactly. Lows and Highs aren't just stamped because they are the lowest or highest pressure on the map. It has to do with ambient pressure. The 1017hPa low in the Gulf is because surrounding pressures in the Gulf are >1017hPa. The 1016hPa high in Canada is because surrounding pressures in Canada are <1016hPa.
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#4 Postby wall_cloud » Fri Jan 25, 2008 10:14 pm

both of the above posters are right on. Its a relative low (or high)
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