with the Axon Mote
Forecasters were predicting hurricane Sandy to collide with a wintry system. So when two major storm systems were set to collide, the good 'ol media hyped it up as 'Frankenstorm'. Folks, hurricanes require warm air to live, and winter storms require cold air. So when you put +1 and -1 together, you get zero. Well, ok, when a hurricane dies it dumps large quantities of rain, and some states got heavy amounts of snow. The damage to New York and New Jersey were from the rise in the tide (they were also hit by the stronger side, too).
Anyway, forecasters predicted the areas which the storm hit would have record low air pressures. So I got to thinking, wouldn't it be fun to measure it? How often do I get a chance to measure a hurricane!
Source code: Axon_Mote_Measure_Frankenstorm.zip
Plug the battery into the header labeled B (for battery), and the sensor into the I2C header labeled G 3 C D (for Ground, 3.3V, SCL, SDA). This will take you all but 5 seconds thanks to the convenient header system.
The software blinks the green LED during each reading, just to let me know it's working fine. (is the battery dead? memory card full? etc.)
I then put it on the window sill of my bathroom, as I could open the window and still isolate that room from the rest of my place. The problem with this setup, of which I was fully aware of, is the expected temperature swings when I shower . . . You'll see short-lived temperature spikes later in the data.
For those who don't know, 100 kPa is 1 atm. I cropped off the data before and after the hurricane, of which didn't vary much from the beginning and end of the chart anyway.
The local weather station, a 2 minute drive from me, recorded the lowest pressure of 96,026.96 pascals (96 kPa) on the night of October 29th. However, the station has no data for the 30th, so perhaps power went out for them. It would have been nice to compare data . . .
I recorded a minimum (record?) pressure of 95.649 kPa, which is about what the forecasters were predicting a day or two before. The pressure dropped very slowly, taking about 20 hours to drop 3 kPa.
I really did think temperature would have looked similar to the pressure curve. But instead, it just kept getting colder and colder . . . Temperature fluctuated much more than I expected, too. And of course, it's obvious when I showered, lol.
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