Weather database explorer hack

This is a mostly functional tool for plotting weather data from Penacook NH. One data set has the weather snapshots taken every 10 minutes, the other has a summary of data for each day. You can select several things to plot together, however, the system only does a limited job of making sensible plots. Each variable is a member of a class, e.g. temperature and dew points are both temperatures and it makes sense to plot them with the same scale. Likewise, rain and snow depth are both measured in inches, but they don't go together nearly as well. Barometric pressure is also in inches (of mercury) but its small range makes it just plain silly to include with the others. Currently defined classes are inch, percent, pressure, speed, and temperature.

Gnuplot has two yaxis scales. The left axis is used for the class of the first variable plot (e.g. degrees for temperature). The right axis is used for all the rest. The class used is that of the last variable selected. In general, you only want to select variables from two classes.


Select the starting date (year, month, day), the number of days to plot, and the variables you want to see. Clicking submit will send the query to the weather data server which will create the plot and send back a web page that includes it.

Raw data samples

These data are samples taken every 10 minutes.
They are useful to see how things change during the day.

Year Month Day Term Variables
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
6
11
16
21
26
1 day
7 days
10 days
30 days
31 days
Temperature
Dew point
Relative humidity
Wind
High wind
Barometric pressure
Rain
Rain rate
Daily summary data

These data are "reduced" from the raw samples into one sample per day.
They are useful for daily highs and lows, rain fall, snow depth, etc.

Year Month Day Term Variables
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
6
11
16
21
26
7 days
10 days
30 days
31 days
60 days
90 days
120 days
High temperature
Low temperature
Snow depth
Snow fall
Rain


Contact Ric Werme or return to his home page.

Last updated 2015 Dec 13.