Barometric Pressure in Grand Blanc, United States 
1021.7 hPa
22.2 ℃
39%
3.7 m/s
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The average pressure in Grand Blanc, Michigan, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at times, very unsettled
Rapid Pressure Changes
Rapid pressure changes detected in Grand Blanc, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Grand Blanc is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Grand Blanc hour by hour across the next 6 hourly readings.
The barometric pressure in Grand Blanc, Michigan varies throughout the day. It changes depending on the weather systems that pass through the region.
Grand Blanc is located in the eastern part of the Saginaw Street Valley. This valley runs southwest to northeast through the Flint metropolitan area. The surrounding terrain is generally flat.
The flat landscape allows winds to move freely through the region. This leads to rapid changes in atmospheric pressure. Weather systems can quickly move into and out of the area.
Cold air masses from Canada can move quickly into the region. This brings cold temperatures and lower pressure. Warm air from the Gulf of Mexico can also move into the area. This brings warmer temperatures and higher pressure.