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Weather Prediction Table
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Weather Prediction Table
| This table was adapted from a weather prediction table originally devised by Dr. Adam Clark, that first appeared in a USDA publication from 1903, titled Weather Folklore and Local Weather Signs, by Edward B. Garriot. | ||
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Wind Direction
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Barometer Reading
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Weather Forecast
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| SW to NW | 30.10 to 30.20, steady | Fair with little temperature change for 1 to 2 days |
| SW to NW | 30.10 to 30.20, rising quickly | Fair and warmer, rain within 2 days |
| SW to NW | 30.20 or above, steady | Continued fair with little temperature change |
| SW to NW | 30.20 or above, falling slowly | Fair with slowly rising temperatures for 2 days |
| S to SW | 30.00 or below, rising slowly | Clearing within a few hours, fair for next few days |
| S to SE | 30.10 to 30.20, falling slowly | Rain within 24 hours |
| S to SE | 30.10 to 30.20, falling quickly | Increasing wind, rain in 12 to 24 hours |
| S to E | 29.80 or below, falling quickly | Severe storm within a few hours, then clearing and colder in 24 hours |
| SE to NE | 30.10 to 30.20, falling slowly | Rain in 12 to 18 hours |
| SE to NE | 30.10 to 30.20, falling quickly | Increasing winds with rain in 12 hours |
| SE to NE | 30.00 or below, falling slowly | Rain continuing 1 to 2 days |
| SE to NE | 30.00 or below, falling quickly | Rain with high winds, clearing and colder in 24 to 36 hours |
| E to NE | 30.10 or above, falling slowly | Light winds in summer, rain in 2 to 4 days. Rain or snow within 24 hours in winter. |
| E to NE | 30.10 or above, falling quickly | Rain probable within 12 to 24 hours in summer. Increasing winds with rain or snow in winter |
| E to N | 29.80 or below, falling quickly | Severe gale from the NE in a few hours, heavy precipitation. Heavy snow followed by a cold wave in winter |
| Swinging to W | 29.80 or below, rising quickly | Clearing and colder |
| *Note: To adjust local barometer readings to sea level, add .01 inch for every 10 feet of elevation above sea level. Subtract .01 inch for every 10 feet below sea level.This information taken from the Horticulture Gardener’s Desk Reference | ||
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