Clickable Link. Enables data to be downloaded to your PC. Data is stored in a random access file which can be downloaded to any PC. The data file is in a compacted form and requires a programme to expand it into a form suitable to read or for Microsoft Excel©. A copy of this program can be obtained by filling in the Contact sheet on the page Contacting us.

The number of records stored is normally 2048 this gives approximately 1 months data into a 131k file, more capacity is available if needed.The following data is stored:

Station Identification
Date, Month, Year, Hour, Minute for data collected.
Rainfall Total,
Most Prevailing Wind Direction,
Windspeed average for interval,
2 minute Average Windspeed,
10 minute Average Windspeed,
Windspeed Maximum since last record,
Windspeed Maximum for the day, Time of Maximum,
Air Temperature Average for this record,
Air Temperature Maximum and Time of Maximum,
Air Temperature Minimum and Time of Minimum,
Barometric Pressure average for this record,
Pressure maximum and time of Pressure Maximum,
Pressure minimum and time of Pressure Minimum,
Solar Average,
Solar Maximum and Time of Solar Maximum,
Solar Minimum and Time of Solar Minimum,
Minutes of Solar activity above a certain threshold,
Auxiliary channel Average,
Auxiliary channel Maximum and Time of Maximum,
Auxiliary channel Minimum and Time of Minimum,
Minutes of Surface Wetness,
Precipitation condition,
Dry, Wet, Air Frost, Sleet/Snow, Ground Frost, Ground Ice, Ice/Snow

Wind Chill is a way of describing how cold a person may feel in wind. Cold temperatures in an absolutely still atmosphere will be far more tolerable than in a gale force wind, thus the "chilling" effect of wind is quite important to understand your comfort level in cool temperatures made even cooler in windy conditions.

Scientifically, when wind force flows past the human body it takes energy or warmth from that body causing evapouration of any water molecules present on the skin. These molecules will leave taking with them heat, hence a wind chill factor. Above a certain temperature ( > 33° C ), Wind chill has no relevance and equally below a certain windspeed ( < 3 mph ) too.

Wind Chill needs data from Air Temperature sensors and Windspeed Sensors.

Under the analysis column, where relevant, appear the difference in sensor reading since last record. For temperature, a verb will be used such as "cooler" or "warmer" and Pressure may warrant "Rising" or "Falling". If the difference in reading since last value is less than that specified in the DCP.DAT (file which controls the weather station) under the control variables "BPNWSHIFT", "ATNWSHIFT", "STNWSHIFT", "WCHLSHIFT", then the message "No Change" will be used. Current values are compared with those stored an hour ago. Using the environment variable "WINDIFF" this can be extended further back.

Minutes of sunshine are determined by the weather station. This value uses an offset and multiplier within the station to expand the solar voltage output. A threshold point is also specifiable which triggers the minutes of sun above this voltage. Thus if Solar sun point is 1000 on the HTML graph then

[(HTML Solar point/SOLAR MULT)*13123]+32768 = THRESHOLD VAL

These values to set up sun measurement are generated when the solar information required is known.

For the various type of solar intensity, a description is used to describe the possible light effect.

Based on longitudinal and latitude co-ordinates for observable solar radiation. These calculations give the point at which the whole solar disc sinks below or just becomes visible at the horizon. BST British Summer Time when occurring introduces an offset for time when these events happen. The rise and set times always refer to the present day. New sunrise and sunset times are recalculated after midnight using information held in the DCP variable GRIDREF.