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S.A.M.E. codes filter NOAA weather alerts to your county only. Find your 6-digit code at weather.gov, enter it in 6 steps, and stop getting alerts for areas far from you.
Shortwave reaches beyond local infrastructure when AM/FM stations go dark. Learn what frequencies matter, which stations to know, and the best emergency shortwave radios for your kit.
Dew point measures the exact moisture in the air not just how full it is. Learn the comfort scale, see how it differs from humidity, and use our free calculator.
Barometric pressure is the weight of the atmosphere pressing down on the earth. Learn what the numbers mean, how it affects weather and your body, and how to read a barometer.
A complete guide to weather instruments including thermometers, barometers, anemometers, hygrometers and rain gauges. Learn what each one measures and which to buy for home use.
Ocean temperatures drive weather through evaporation, heat transfer, and circulation patterns. Here is how ENSO, the AMO, the PDO, and sea surface temperatures shape weather worldwide.
El Niño seasons average 10 named storms and 5 hurricanes. La Niña seasons average 15 and 8. Here is the full comparison, the mechanism, and the 2023 exception explained.
The 2015-16 El Niño holds the record ONI peak of +2.6°C per NOAA data. The 1997-98 event was the most damaging. Every major event since 1950 ranked by strength with full impact data.
Trade winds are the single most important variable in the ENSO cycle. Sustained weakening initiates El Niño. Strengthening beyond normal drives La Niña. Here is exactly how.
ENSO is the most significant driver of year-to-year climate variability on Earth. Here is what it is, how it is measured, and why it matters for seasonal forecasting.
