SkyStef's weather page


home  |  e-mail    


Weather station Kampenhout

Nederlandse versie

Current weather conditions at Kampenhout, Belgium

as of: 17/01/17 23:35

Temperature -3.7C   Windchill -3.7C 
Dewpoint -5.2C  Heat Index -3.7C 
Humidity 89%   THW Index -3.7C 
Wind* (10' average) ENE  0.0 kt   max 0.0 kt Today's max gust at 4:14 7.8 kt 
Today's Rain 0.0 mm Yearly Rain 38.4 mm
Today's Evapotranspiration (ET) 0.28 mm Yearly Evapotranspiration (ET) 5.61 mm
Solar Radiation 0 W/m  Today's max Solar Radiation at 11:42 304 W/m 
Pressure 1039.5 hPa  Trend Steady 

* wind was measured at 2 meter height till January 12 2012, afterwards at 10 meter height 

Weather data of past 2 days

Climatological summary

Monitoring barometer, temperature, wind


History weather graphics
 (legend see bottom)

Today's high T at 15:27    0.7C
Today's low T
at 23:35    -3.7C

Yearly high T
Yearly low T   -6.3C

Today's high Td at 0:00    -3.3C
Today's low Td
at 7:05    -5.0C

Yearly high Td
Yearly low Td   -7.8C

Today's high humidity at 3:15  91%
Today's low humidity
at 15:35  72%

Yearly high humidity
Yearly low humidity  64%

Wind speed 0.0 kt

1' average speed
  0.0 kt  max 0.0 kt

2' average speed
  0.0 kt  max 0.0 kt

5' average speed
 0.0 kt  max 0.0 kt

10' average speed
  0.0 kt   max 0.0 kt

Today's max gust at  4:14 7.8 kt

Yearly max gust
  25.2 kt

Today's rain  0.0 mm

Storm rain
 0.0 mm

Monthly rain
  38.4 mm

Yearly rain
  38.4 mm

Rain rate  0.0 mm/hr

High rain rate
 0.0 mm/hr at ----

High hourly rain rate
  0.0 mm/hr

High monthly rain rate
  1645.8 mm/hr

High yearly rain rate
  1645.8 mm/hr

Today's high pressure at 23:19  1039.6 hPa
Today's low pressure
at 0:00  1034.0 hPa

Yearly high pressure
 1041.8 hPa
Yearly low pressure  980.9 hPa

Station reception status last 6 hours


Outside Temperature Is the air temperature measured at 1,5 meters height measured in degrees Celcius. A solar powered fan runs 24 hours/day avoiding as much as possible greenhouse effects
Outside Dew Point Is the temperature (in degrees Celcius) at which condensation forms (=100% relative humidity)
Outside Humidity Relative humidity in % is the ratio of the air's water vapor content to its capacity. Completely saturated = 100%
Wind Speed Wind speed in knots measured at 10 meters height. The graphs shows the 1 minute average speed with highest gust in this period. In the table also 2, 5, 10 minute average wind speed are shown with corresponding gusts in their periods. 
Wind Direction Wind direction where the wind blows from at 10 meters height. The graphs show the 1 minute average direction. 
Wind Chill Measured in degrees Celcius, is the combination of temperature and wind speed. When the wind is blowing, it carries away the air that has been warmed by your body. It feels as if the temperature is lower than it really is. Above 33C, wind movement has no effect on the apparent temperature, so wind chill is the same as the outside temperature.
Heat Index Measured in degrees Celcius, uses the temperature and the relative humidity to determine how hot the air actually 'feels'. When humidity is low, the apparent temperature will be lower than the air temperature, since perspiration evaporates rapidly to cool the body. However, when humidity is high (i.e., the air is saturated with water vapor) the apparent temperature 'feels' higher than the actual air temperature, because perspiration evaporates more slowly. The heat index is only measured when the air temperature is above 14C because it is insignificant at lower air temperatures. (Below 14C, heat index = air temperature).
THW Index THW (Temperature - Humidity - Wind) Index uses humidity, temperature and wind to calculate an apparent temperature (in degrees Celcius).
Rain Four separate readings for tracking measured in mm: storm rain, daily rain, monthly rain and yearly rain. Storm rain is the amount of rain in a continuous period of rain with an amount of leeway for beginning and end. As used here, storm begins when 0.5 mm of rain has fallen in a 24-hour period, and continues until 24 hours pass without 0.5 mm of rain.
Rain Rate Is calculated by measuring the interval of time between each 0.2 mm rainfall increment, the minimal amount of rain for tipping the bucket mechanism.
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/m). Bright sunshine is considered to be occurring when the solar radiation level exceeds 100 W/m, so it can easily be worked out how many hours of sunshine occur daily from this reading.
Solar energy The energy transmitted from the sun in form of electromagnetic radiation, measured in langleys (Ly). One langley is equal to one gram-calorie per square centimeter. A gram-calorie is the amount of heat required to raise the temperature of one gram of water one degree Celsius.
ET (evapotranspiration) Measured in mm, is the amount of water transferred from the earth to the atmosphere due to the combined effects of evaporation and transpiration. Transpiration is the process by which plants release water vapor into the air. The Davis Vantage Pro Plus uses air temperature, relative humidity, average wind speed, and solar radiation data to estimate ET.
Air Density The Davis Vantage Pro2 measures the air density in kilogram per cubic meter by taking account of the air temperature, pressure and how much water vapor is in the air. We know that one cubic meter of air contains around 78% nitrogen molecules, with an atomic weight of 28. Another 21% of the air is oxygen, with the molecules having an atomic weight of 32. The last 1% is a mixture of other gases, which are insignificant. Other molecules are free to move in and out of our cubic meter of air. If water vapor molecules are added to our cubic meter of air, nitrogen and oxygen molecules will leave, the total number of molecules in our cubic meter of air staying the same. As the water molecules have an atomic weight of 18, (lighter than nitrogen and oxygen), the weight of our cubic meter decreases, thus the density decreases. We can only get a calculation for air density in the outside temperature is above freezing point.
Heat deg days Heating degree days (HDD) are used to estimate the amount of energy required for residential space heating during the cool season. To calculate the HDDs you must first find the mean temperature for the day. This is usually done by taking the high and low temperature for the day, adding them together and dividing by two. If the mean temperature is at or above 18.3C, then the HDD amount is zero. If the mean temperature is below 18.3C, then the HDD amount equals 18.3C minus the mean temperature. For example, if the mean temperature was 8.0C then the HDD amount equals 10.3 C. Normally there will no readings during the spring and summer, unless a particularly cold day may occur.
Cool deg days Cooling degree days (CDD) are used to estimate the amount of air conditioning usage during the warm season. To calculate CDDs, you must first find the mean temperature for the day. This is usually done by taking the high and low temperature for the day, adding them together and dividing by two. If the mean temperature is at or below 18.3C, then the CDD value is zero. If the mean temperature is above 18.3C, then the CDD amount equals the mean temperature minus 18.3C. For example, if the mean temperature was 25C then the CDD amount equals 6.7C. Normally there will no readings during the autumn and winter, unless a particularly hot day may occur.
Barometer (air pressure) Measured in hPa is 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 mountain top. To compensate for this difference and facilitate comparison between locations with different altitudes, atmospheric pressure is generally adjusted to the equivalent sea-level pressure. This adjusted pressure is known as barometric pressure. In reality, the Davis Vantage Pro Plus measures atmospheric pressure, but then translates this to barometric pressure. Barometric pressure also changes with local weather conditions, making barometric pressure an extremely important and useful weather forecasting tool. High pressure zones are usually associated with fair weather while low pressure zones are generally associated with poor weather. For forecasting purposes, however, 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
Reception (of Vantage Pro2) This allows to monitor the performance on the Davis Vantage Pro2 console of the past 6 hours. It shows in % how good the reception was between the console and the remote transmitters with 100% = excellent, 0% = no reception