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Weather Forecasting Tips

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The below table comes from the US Governments NOAA website.  It has some basic weather forecasting tips that are useful for ambient home weather stations.

Below is a general summary of wind and barometer indications in the United States. The amateur forecaster should modify the table as needed, based on his or her own observations. Barometric pressures in this table are in inches of mercury at sea level. If you use local weather reports to calibrate your instruments, you don’t have to worry about this because official measurements are converted to sea level before they are reported to the public. A general rule of thumb is that atmospheric pressure decreases by one inch of mercury for every 1,000 feet of elevation.

If the Wind is Blowing fromand the Barometer isthe Probable Weather is
Southwest to Northwest30.10 to 30.20 and steadyFair with slight temperature change for one to two days
Southwest to Northwest30.10 to 30.20 and rising rapidlyFair, followed by rain within two days
Southwest to Northwest30.20 and above and steadyContinued fair, with little temperature change
Southwest to Northwest30.20 and above and falling slowlySlowly rising temperature and fair for two days
South to Southeast30.10 to 30.20 and falling slowlyRain within 24 hours
South to Southeast30.10 to 30.20 and falling rapidlyWind increasing in force, rain within 12 to 24 hours
Southeast to Northeast30.10 to 30.20 and falling slowlyRain in 12 to 18 hours
Southeast to Northeast30.10 to 30.20 and falling rapidlyIncreasing wind, and rain within 12 hours
East to Northeast30.10 and above and falling slowlyIn summer: rain may not fall for several days  In winter: rain within 24 hours
East to Northeast30.10 and above and falling rapidlyIn summer: rain likely within 12 to 24 hours  In winter: rain or snow, with increasing winds
Southeast to Northeast30.00 or below and falling slowlyRain will continue one to two days
Southeast to Northeast30.00 or below and falling rapidlyRain, with high wind, followed by clearing within 36  hours, and by colder temperatures in winter
South to Southwest30.00 or below and rising slowlyClearing within a few hours, and fair for several days
South to East29.80 or below and falling rapidlySevere storm soon, followed by clearing within 24  hours, and by colder temperatures in winter
East to North29.80 or below and falling rapidlySevere northeast gale and heavy precipitation In winter: heavy snow, followed by a cold wave
Changing to West29.80 or below and rising rapidlyClearing and colder

 

Source:  noaa.gov

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