Station Data Structures

XML Archive Output

<Station ID={Assigned ID}'> 
     <Archive>      -- this is an archive record
          <WE_Date>     --the local weather date
          <WE_Time>     --the local weather end time for this archive interval period
          <TEMP_OUT>     --the average temperature for the interval period in celcius
          <TEMP_HI>     --the highest recorded temperature for the interval period
          <TEMP_LOW>     --the lowest recorded temperature for the interval period
          <HUM_OUT>     --the average relative humidity read
          <DEW_OUT>     --the average dew point
          <WIND_SPEED>     --the average wind speed in Kph
          <WIND_DIR>     --the dominate wind rose direction (16 points)
          <WIND_RUN>     --the distance that wind will cover in Klm
          <WIND_HI>     --the highest wind speed in Kph
          <WIND_CHILL>     --the apparent temperature with wind speed affects
          <HEAT_OUT>     ---the apparent temperature with humidity affects
          <TWH>     ---the apparent temperature with wind and humidity affects
          <TWHS>     ---the apparent temperature with wind, humidity and solar affects
          <BAR>     ---barometric pressure
          <RAIN>     ---amount of rain fall in the interval period
          <RAIN_RATE>     ---rate that rain is falling over a 1 hour period
          <SOLAR_LUM>     ---the average luminosity over the interval period
          <SOLAR_RAD>     ---the average solar radiation level measured over the interval period
          <SOLAR_RAD_HI>     ---the maximum solar radiation measured
          <SOLAR_UV>     ---the maximum ultra violate level reading over the interval period
          <SOLAR_MAX>     ---the maximum solar radiation possible during this interval
          <SOLAR_ENERGY>     ---the solar energy (Ly) collected during this interval period
          <CLOUDY>     ---the average amount of cloud cover during daylight for the interval period
          <HEAT_DD>     ---the amount of heat degrees for this interval
          <COOL_DD>     ---the amount of cool degrees for this interval
          <ARC_INT>     ---the interval period in minuites
          <WE_DATE_TIME>     ---UTC time at end of the interval period

 

 

 

XML Daily

<Station ID='{station ID}'>
  <Day>      -- this is a daily record
          <WE_Date>     --the local weather date
          <TEMP_AVG>     --the average temperature for the day in celcius
          <TEMP_HI>     --the highest recorded temperature for the day
          <TEMP_LOW>     --the lowest recorded temperature for the day
          <HUM_AVG>     --the average relative humidity reading for day
          <DEW_AVG>     --the average dew point for day
          <WIND_AVG>     --the average wind speed in Kph
          <WIND_DIR>     --the dominate wind rose direction (16 points)
          <WIND_RUN>     --the distance that wind will cover in Klm
          <WIND_HI>     --the highest wind speed in Kph
          <WIND_CHILL>     --the apparent temperature with wind speed affects
          <HEAT_OUT>     ---the apparent temperature with humidity affects
          <TWH>     ---the apparent temperature with wind and humidity affects
          <TWHS>     ---the apparent temperature with wind, humidity and solar affects
          <BAR>     ---average barometric pressure
          <BAR_LOW>     ---the lowest barometric pressure reading today
          <BAR_HI>     ---the highest barometric pressure reading today

          <RAIN>     ---amount of rain fall today (resets at midnight)
          <SOLAR_RAD_HI>     ---the maximum solar radiation measured today
          <SOLAR_UV>     ---the maximum ultra violate level reading today
          <SOLAR_ENERGY>     ---the maximum solar energy (Ly) accumulated today
          <SUN_HRS>     ---the hours of full sunlight today
          <HEAT_DD>     ---the amount of heat degrees for this interval
          <COOL_DD>     ---the amount of cool degrees for this interval
          <ARC_INT>     ---the interval period in minuites

XML Current

<Station ID={Assigned ID}'> 
     <Current>      -- this is the current readings
          <WE_Date>     --the local weather date
          <WE_Time>     --the local weather time
          <TEMP_OUT>     --the temperature in celcius
          <TEMP_HI>     --the highest recorded temperature for the feed period
          <TEMP_LOW>     --the lowest recorded temperature for the feed period
          <HUM_OUT>     --the relative humidity
          <DEW_OUT>     --the dew point
          <WIND_SPEED>     --the wind speed in Kph
          <WIND_DIR>     --the dominate wind rose direction (16 points)
          <WIND_RUN>     --the distance that wind will cover in Klm for last archive period
          <WIND_HI>     --the highest wind speed in Kph
          <WIND_CHILL>     --the apparent temperature with wind speed affects
          <HEAT_OUT>     ---the apparent temperature with humidity affects
          <TWH>     ---the apparent temperature with wind and humidity affects
          <TWHS>     ---the apparent temperature with wind, humidity and solar affects
          <BAR>     ---barometric pressure
          <RAIN>     ---amount of rain fall in the interval period
          <RAIN_RATE>     ---rate that rain is falling over a 1 hour period
          <SOLAR_LUM>     ---the solar luminosity
          <SOLAR_RAD>     ---the solar radiation level
          <SOLAR_RAD_HI>     ---the maximum solar radiation
          <SOLAR_UV>     ---the ultra-violate level reading
          <SOLAR_MAX>     ---the maximum solar radiation level
          <SOLAR_ENERGY>     ---the solar energy (Ly) collected during this interval period
          <CLOUDY>     ---the amount of cloud cover during daylight for the interval period
          <HEAT_DD>     ---the amount of heat degrees for this interval
          <COOL_DD>     ---the amount of cool degrees for this interval
          <ARC_INT>     ---the interval period in minuites
          <WE_DATE_TIME>     ---UTC time at end of the interval period
          <NAME>     ---the name of this station
          <LATITUDE>     ---the latitude of the station
          <LONGITUDE>     ---the longitude of the station
          <ALTITUDE>     ---the altitude above sea level of the station

Glossary

TEMP_OUT
Temperature Outside (average)
Also: Avg Temp   

TEMP_HII
Temperature hi for the time period.
Also: Max Temp

TEMP_LOW
Temperatuer low for the time period.
Also: Min Temp

HUM_OUT
Humidity Outside
Also: Humidity
The ratio of the actual amount of water vapor in the air to the maximum amount of water vapor the air could hold at that temperature. More precisely called relative humidity

DEW_OUT
Dew Temperature
A measure of humidity stated in terms of the temperature at which the air would be saturated and dew would begin to form if the amount of water vapor in the air were held constant.

WIND
Wind Speed (km)

DIR
Direction of Wind

WHI
Wind High (gusts)

WHIDIR
Direction of high wind

WIND_CHILL    
Wind chill takes into account how the speed of the wind affects our perception of air temperature. Your body warms the surrounding air molecules by transferring heat from your skin. If there’s no air movement, this insulating layer of warm air molecules stays next to your body and offers some protection from cooler air molecules. Wind disperses this layer of warm air, causing the air temperature to "feel" colder. The faster the wind blows, the quicker the layer of warm air is dispersed, and the colder you feel. Above 93.2ºF (34.0ºC), wind movement has no effect on the apparent temperature.Modified Wind Chill calculations between 40ºF (4.4ºC) and 93ºF (33.9ºC) give more intuitive readings for temperatures above the upper limit of the official wind chill formula (40ºF) The result of this modification is lower wind chill values in the above temperature range than using the official formula

THW
The THW Index uses humidity, temperature and wind to calculate an apparent temperature that incorporates the cooling effects of wind on our perception of temperature.

THWS
The THWS Index uses humidity, temperature, the cooling effects of wind and the heating effects of direct solar radiation to calculate an apparent temperature.

BAR
The weight of the air that makes up our atmosphere exerts a pressure on the surface of the earth. This pressure is known as atmospheric pressure. Generally, the more air above an area, the higher the atmospheric pressure. This, in turn, means that atmospheric pressure changes with altitude. For example, atmospheric pressure is greater at sea-level than on a mountaintop. To compensate for this difference in pressure at different elevations, and to facilitate comparison between locations with different altitudes, meteorologists adjust atmospheric pressure so that it reflects what the pressure would be if measured at sea-level. This adjusted pressure is known as barometric pressure.

Barometric pressure changes with local weather conditions, making barometric pressure an important and useful weather forecasting tool. High pressure zones are generally associated with fair weather, while low pressure zones are generally associated with poor weather. For forecasting purposes, the absolute barometric pressure value is generally less important than the change in barometric pressure. In general, rising pressure indicates improving weather conditions, while falling pressure indicates deteriorating weather conditions.

RAIN    
The amount of rain recieved in the persion. (mm)

SOLAR_RAD

Solar Radiation
What we call "current solar radiation" is technically known as Global Solar Radiation, a measure of the intensity of the sun’s radiation reaching a horizontal surface. This irradiance includes both the direct component from the sun and the reflected component from the rest of the sky. The solar radiation reading gives a measure of the amount of solar radiation hitting the solar radiation sensor at any given time, expressed in Watts per square meter (W/m2). The value logged by WeatherLink is the average solar radiation measured over the archive interval.

SOLAR_ENERGY

Solar Energy
The amount of accumulated solar radiation energy over a period of time is measured in Langleys.
    1 Langley  = 11.622 Watt-hours per square meter 
= 3.687 BTUs per square foot = 41.84 kilojoules per square meter

HEAT_DD COOL_DD

Heating Degree Days and Cooling Degree Days
Although degree-days are most commonly used in agriculture, they are also useful in building design and construction, and in fuel use evaluation. The construction industry uses heating degree-days to calculate the amount of heat necessary to keep a building, be it a house or a skyscraper, comfortable for occupation. Likewise, cooling degree-days are used to estimate the amount of heat that must be removed (through air-conditioning) to keep a structure comfortable. Heating and cooling degree-days are based on departures from a base temperature, typically 65ºF (18ºC). One heating degree&endash;day is the amount of heat required to keep a structure at 65ºF when the outside temperature remains one degree below the 65ºF threshold for 24 hours. One heating degree&endash;day is also the amount of heat required to keep that structure at 65ºF when the temperature remains 24ºF below that 65º threshold for 1 hour. Likewise, one cooling degree&endash;day is the amount of cooling required to keep a structure at 65ºF when the outside temperature remains one degree above the 65ºF threshold for 24 hours. One cooling degree-day is also the amount of cooling required to keep that structure at 65ºF when the temperature remains 24ºF above that 65º threshold for 1 hour. Depending on the calculation method, both heating and cooling degree-days can accumulate in the same day. Also, note that there are no negative degree-days. If the temperature remains below the threshold, there is no degree-day accumulation