Low Pressure
North AmericaPhysical EnvironmentA region where atmospheric pressure at the surface is lower than surrounding areas
NOAAA map highlights the low pressure regions in North America by a letter L enclosed in a circle. On the border of Washington and British Columbia. In the Halifax, and Manitoba Ontario boarder. One in the Amarillo.
Low Pressure | Class | Rank | Percentage of change | Class | Rank | Percent | -2.0 to 0.0 | 0.0 to 1.9 | 2.0 to 3.9 | 4.0 to 5.9 | 6.0 to 7.9 | 8.0 to 9.9 | 10.0 to 11.9 | 12.0 to 13.9 | 14.0 to 15.9 | 18.0 to 19.9 | 20.0 to 21.9 | 22.0 to 23.9 | 24.0 to 25.9 | 26.0 to 27.9 | 28.0 to 29.9 | Class | Rank | Percent | 4.50–4.59 pH | 4.60–4.69 pH | 4.70–4.79 pH | 4.80–4.89 pH | 4.90–4.99 pH | 5.00–5.09 pH | 5.10–5.19 pH | 5.20–5.29 pH | ≥5.30 pH | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.06% | 0.769% | 0.553% | 0.725% | 0.603% | 0.825% | 0.239% | 0.135% | 0.206% | 0.342% | 0.126% | 0.317% | 1.60% | 0.778% | 4.46% | 4.29% | 14.4% | 23.8% | 24.2% | 18.5% | 16.1% | 11.6% | 6.63% | 81.6% | ||||||||||
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