Today's barometric pressure in St. Louis, a 48-hour pressure chart, and a migraine risk score based on pressure drops, humidity, and temperature changes.
St. Louis sits at the confluence of the Missouri and Mississippi rivers, a geographic crossroads for weather systems. The city's central US location means exposure to both tropical Gulf moisture and Arctic cold fronts, often in the same week.
Worst season for migraines: March through June and October through November. St. Louis sits at the confluence of the Mississippi and Missouri rivers where severe weather corridors overlap. Spring supercell thunderstorms and tornadoes produce the most extreme pressure events, while fall brings sharp cold frontal contrasts as Arctic air invades the warm river valleys.
Common triggers in St. Louis: Mississippi Valley severe thunderstorm development, river valley humidity trapping in summer, rapid cold front passages with 30-degree temperature drops. St. Louis occupies the American Bottom where the Missouri River flows into the Mississippi, creating a broad floodplain that channels moisture and weather systems. The Ozark foothills to the southwest provide minimal terrain interference, and the river valleys act as humidity reservoirs that enhance storm development. The city's position at the intersection of multiple storm tracks makes it one of the more barometrically volatile metros in the central US.
Typical pressure: St. Louis averages 1000 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 985 hPa. Swings of 14-22 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
Can St. Louis weather trigger migraines?
Yes. St. Louis experiences 14-22 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Mississippi Valley severe thunderstorm development, river valley humidity trapping in summer, rapid cold front passages with 30-degree temperature drops.
What time of year are migraines worst in St. Louis?
In St. Louis the most barometrically volatile stretch of the year falls in March through June and October through November. That is when weather is most likely to play a part, if weather is a trigger for you at all.
How do I track migraine triggers in St. Louis?
Use MigrAid to log your attacks with one tap. The app automatically records barometric pressure, temperature, and humidity at the time of each migraine, then finds patterns between your attacks and St. Louis's weather conditions over time.
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Is it really the weather?
Weather gets blamed for a lot of migraines, but it's hard to know if it's really behind yours. The MigrAid app saves the barometric pressure with every migraine you log, so after a few weeks you can see whether St. Louis's swings actually line up with your attacks, and get a heads-up on days that match your pattern.