In default there is 4 mb / 3h but before last storm there is no warning, should i set it in different value?
After looking into it I'd like to come up with some guesses. The short of it is, change the setting to the lowest possible rate. That is, if you're using millibars, change the rate to 2mb/3h, hectopascals 2hPa/3h, etc.
Lately I have been interested in barometric pressure and weather but I still think predicting weather based on pressure was something more commonly done in the 1800's like on a farm or at sea.
Take a look at these old things.
https://encrypted.google.com/search?q=barometer+weather&safe=active&hl=en&tbm=isch
http://www.artofmanliness.com/2015/07/07/fair-or-foul-how-to-use-a-barometer/
https://en.wikipedia.org/wiki/Atmospheric_pressure
Pressure is measured a few ways: bars/millibars, pounds per square inch (psi), pascal, atmosphere (atm), and a few others. It doesn't really matter which one you use. They're all units of measurement.
Now, air pressure varies all over the Earth. Some places can see dramatic swings in air pressure while others may not and weather relies on a bunch of other junk (humidity, wind, temp., altitude, etc.) With that being said, I don't think meteorologists today solely rely on a barometer or if grandpa's trick knee starts aching to know when a storm's a'brewin'.
Maybe at sea a huge drop in air pressure indicates something big is about to happen or right before a tornado the air does something funny. Where I live, it's on average 60-70% humidity even without a cloud in the sky. I couldn't say what causes the rain to suddenly drop when it wants to.
For us living in cities, I imagine one reason generations before us picked these specific parts of the planet to dwell was because they didn't experience dramatic weather changes. Consequently, I think of the barometer as simply a toy unless I was climbing Mount Everest or sailing across the ocean in a tiny sailboat. If I'm at home and the pressure swings so dramatically to trigger an alert, the only thing I could imagine is a tornado is about to wipe me out or something.
...Back to the settings on the watch...
Looking at the NOAA http://www.weather.gov/ for the barometric pressure swings during a storm in my area last Friday, the pressure didn't suddenly drop our anything even though it started to pour outside.
the pressure from hour to hour was like 1001.5 millibars and the next our it was 1002.1 millibars or something. According to the wikipedia article I mentioned above, pressure in millibars is usually rounded so, if anything, in the course of an hour the pressure raised either 1 millibar or not at all depending on the rounding. If the watch setting is at it's default for millibars- a 3 millibar change in a 3 hour timespan- there's no way I'll ever see an alert
where to change the unit of measurement
Settings > Sensors and Accessories > Barometer > Pressure
(it doesn't matter which one you pick. Probably just pick the unit of measurement used in your part of the world)
where to change the Storm Alert
Settings > Sensors and Accessories > Barometer > Storm Alert > Rate
I went ahead and set my threshold to the lowest setting of 2 millibars / 3 h to increase the sensitivity to be as sensitive as the watch makes available.
Do you still have your watch? What watch did you have what do you have now? How did your settings or barometric pressure/storm warnings work out for you? Thank you
There are two major types of thuderstorms. A) occures when it's warm and there is a lot of humidity. That humidity rises which cools down the air. This leads to a huge difference in tenperature within a cloud. That difference causes what we call heat thunderstorm
B) when a cold front comes in, this leads also to a rising of warm and humid air bc the cold front slides under the warm air.
For type A) the pressure alarm is useless. For type B) your watch should alarm you.
I get a storm alert any time I use an elevator over about 10 floors, any time I go diving (it’s a Decent) and most times I get sweaty. Ah well. It was cool in theory.
