Guess I'll jump in here, too.
Nice work everyone.
I was never that concerned with anticipating coal usage on a daily basis; more so on a seasonal one. I also would start each season and never remember when I had started the year before. I always wondered if I was early or late each year. Or how much coal I burned last November ... and was it colder last November?
I was also curious about the effect of windspeed on coal consumptiom. I don't know if I ever answered that particular question, but I now know when I start up and shut down each year. I was also concerned with maintenence. When did I last clean out the stove, oil the motors, etc. So I threw together a simple database a few years ago and then added things to it as I got the time ... like how many times I refill the humidifiers, which has absolutely no practical application, but it's interesting to know.
I get the weather data from weatherunderground.com that's uploaded by someone's presonal weather station near me.
It's dead-on accurate each year. I run out of coal on the day it calculates, or I have pretty much exactly the amount leftover that it says. It's nice when I think that I'm running short to have the data from previous years to look back on.
Someone on here (can't remember who) rigged a pedometer to their stove to count how many strokes it takes each day. Fantastic idea that I adopted as well. Unfortunately, my batteries went dead over the summer and I have yet to replace them. But I think that that's far more accurate than measuring pounds in. It's not predictive, but interesting. I've found that I can change the timers on my stove so that the T-stat calls for heat far less often, the stove doesn't overrun the setpoint, and, in the long-run, I burn less coal. The last attachment below shows the timers table that I use to set them.
Attachments show some screenshots and reports. Questions and criticisms are always welcome.