St. Louis, MO weather
Right now 72°, clear · today 76° / 68°, thunderstorm · seven days from the National Weather Service
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Right now · 72° · clear · calm · 10° cooler than this time yesterday · at St. Louis Downtown, 7:25 PM
Today, in the Weather Service’s words
A chance of showers and thunderstorms. Cloudy, with a high near 76. North wind around 3 mph. Chance of precipitation is 30%.
Seven days
Winter in St. Louis
St. Louis averages 14 inches of snow a year, according to NOAA’s 1991-2020 climate normals - a occasional snow place. Snow is a few-times-a-year event. Limited equipment means modest amounts cause real disruption.
That is why local snowfall thresholds differ so much from one town to the next: a district that plans for 14 inches a year is equipped differently from one that never sees any. Here, roughly 2 inches in a single storm is where a normal school day comes under threat.
Upper air over St. Louis
The nearest radiosonde launch is Lincoln, about 115 miles away. A weather balloon goes up twice a day and measures temperature, humidity and wind all the way through the atmosphere - which is what forecasters actually read to judge whether storms will fire, and how a surface forecast was arrived at.
Forecasters covering the Midwest
Sources: National Weather Service forecast and hourly grid for St. Louis (api.weather.gov), updated Wed, 7:06 PM UTC. Sunrise and sunset from NOAA’s solar position calculations. Snowfall normals from NOAA’s 1991-2020 US Climate Normals. County lines from the US Census Bureau.