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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.
Wind Direction
Barometer Reading
Weather Forecast
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 Gardenerís Desk Reference