Cities with Greatest Drop in Barometric Pressure


The following cities are experiencing the biggest drops in barometric pressure today among our tracked cities. This is determined by finding the widest range between the highest and lowest pressures during the 24-hour period starting and ending at midnight, UTC−08:00 (Pacific Standard Time) in each city and filtering for the cities where the time of the highest pressure precedes the time of the lowest pressure.

Because each reading represents a 24-hour window of an hourly weather forecast, from 8 am yesterday through 8 am today (local time), it is possible that the full range of the falling pressure pattern is not captured in the data. In this case, the green triangle () indicates that the highest pressure observed during this period was at the start, meaning that the pressure had likely fallen from a higher high. Conversely, the red inverted triangle () indicates that the lowest pressure forecasted during this period is at the end, meaning that the pressure will likely continue to fall beyond the lower end of the range observed. Therefore, red and/or green triangles indicate that the total drop is likely to be greater than the amount displayed.


#CityDecreaseHigh TimeLow TimeRate
1Guadalajara, Mexico0.52 inHg2 pm yesterday11 pm yesterday-0.058 inHg/hr
2Albuquerque, New Mexico0.51 inHg3 pm yesterday12 am-0.057 inHg/hr
3Denver, Colorado0.46 inHg1 pm yesterday11 pm yesterday-0.046 inHg/hr
4El Paso, Texas0.41 inHg3 pm yesterday12 am-0.046 inHg/hr
5Las Vegas, Nevada0.4 inHg3 pm yesterday1 am-0.040 inHg/hr
6St George, Utah0.4 inHg3 pm yesterday1 am-0.040 inHg/hr
7Cleveland, Ohio0.36 inHg8 am yesterday7 am-0.016 inHg/hr
8Indianapolis, Indiana0.36 inHg11 am yesterday12 am-0.028 inHg/hr
9Detroit, Michigan0.36 inHg8 am yesterday7 am-0.016 inHg/hr
10Phoenix, Arizona0.36 inHg3 pm yesterday1 am-0.036 inHg/hr
11Columbus, Ohio0.36 inHg11 am yesterday7 am-0.018 inHg/hr
12Salt Lake City, Utah0.35 inHg2 pm yesterday1 am-0.032 inHg/hr
13Ho Chi Minh City, Vietnam0.35 inHg2 am7 am-0.070 inHg/hr
14Tucson, Arizona0.34 inHg3 pm yesterday12 am-0.038 inHg/hr
15Grand Rapids, Michigan0.33 inHg8 am yesterday7 am-0.014 inHg/hr
16Cincinnati, Ohio0.33 inHg9 am yesterday7 am-0.015 inHg/hr
17Chicago, Illinois0.32 inHg8 am yesterday7 am-0.014 inHg/hr
18Cairns, Australia0.32 inHg12 pm yesterday5 am-0.019 inHg/hr
19Pittsburgh, Pennsylvania0.31 inHg1 pm yesterday7 am-0.017 inHg/hr
20Darwin, Australia0.31 inHg12 am7 am-0.044 inHg/hr
Legend:
= drop began before recorded 24-hour period (8 am yesterday)
= drop continues beyond recorded 24-hour period (8 am today)




The change and rate of change in barometric pressure is often seen as being more important than the actual pressure value. That is why on many digital barometric pressure displays, the pressure readings are accompanied by “rising” or “falling” indicators. In meteorology, falling pressure is usually a sign of worsening weather, such as an incoming storm, increasing winds, more clouds, or more precipitation.

To folks who experience migraines, joint pain, or other physical conditions that are sensitive to pressure changes, falling pressure typically feels worse than rising pressure, though changes in pressure affect people differently, and stable pressure is generally preferred to larger or more rapid changes in pressure.