PTW Forecasts at Paranal and La Silla

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Check the access statistics for this page (note that Paranal and La Silla telescope operators usually access the forecasts via the weather_watch E-mail bulletins).

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The following Java applet allows to retrieve the numerical values of the predicted parameters up to 36 hour in advance with a 6 hour step and up to 8 days in advance with a 12 hours step. The first line shows the time range used for the 2 weeks training set.

The graphs below show the temporal evolution of the pressure, temperature and wind velocity at ground level at the observatory. On the x-axis is the time index with a step of 6 hours (step 0 starting at 0UT of the first day of the training set, step 52 corresponds to 00UT on the last day of the training set). On the y-axis is the value of the parameter as it has been forecasted by ECMWF (green bars) and as observed on the site (red line). This database of past events is used to train a Kalman filter and to produce the corrected forecasts (blue dots).

Temperature (in C/10) at ground level at Paranal (training set forecast performance) :

Temperature (in C/10) at ground level at La Silla (training set forecast performance) :

Pressure (in mB/10) at ground level at Paranal (training set forecast performance) :

Pressure (in mB/10) at ground level at La Silla (training set forecast performance) :

Wind speed (in m/s/10) at ground level at Paranal (training set forecast performance) :

Wind speed (in m/s/10) at ground level at La Silla (training set forecast performance) :