Forecast Accuracy Report on Temperature

Forecast Accuracy Report on Temperature


Here at Leavening Weather Station we're using a customised version of WXSim Professional to produce our weather forecasts. Our forecast data is collected each hour from sources such as weather buoys, weather balloons and weather stations up to 1000 miles from Leavening itself.

To this is added the information from our own weather station including information about the current conditions. This data is then processed through complex forecast modelling software to give our very own forecasts carried out automatically at 5am, 10am, 3pm and 8pm. As it takes time for all the relevant data to be collated and processed, the forecast usually appears on our web pages around 45 minutes later.

Our forecasts are then compared to those from YrNo (click here for more information) for the relevant time period.

The purpose of the Forecast Accuracy Report is to compare our own WXSIM forecast with the NW forecast and actual recorded conditions. Four daily comparisons are run and the 'winner' in terms of temperature accuracy gets coloured blue. The script also calculates the overall forecast performance and standard deviation from the mean (average) temperature. Bear in mind that YrNo are using >£1m of equipment vs our £2k.

    Leavening Weather Station Forecast Comparison

    Actual Observed (Act), WxSim Generated (WS), YrNo Forecast (NW)
    Early Morning Forecast
    Updated: 18-08-17 at 5:00 am
    Goal Forecast Day Day +1 Day +2 Day +3
    ± 2.0° F High Low High Low High Low High Low
    Date NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    18-08-17 17   18 11   11 18   18 9   10 19   19 14   13 23   22 13   15
    17-08-17 23 22.1 22 13 12.2 14 17   19 11   12 18   18 9   12 19   22 13   16
    16-08-17 21 21.2 21 14 13.1 14 22 22.1 23 12 12.2 13 17   18 11   11 18   18 9   11
    15-08-17 21 19.4 20 9 11.4 11 21 21.2 20 13 13.1 14 22 22.1 22 12 12.2 13 17   18 11   12
    14-08-17 19 20.8 19 13 12.9 14 19 19.4 20 9 11.4 12 21 21.2 21 13 13.1 13 20 22.1 21 11 12.2 13
    13-08-17 19 18.5 18 12 11.6 12 19 20.8 20 13 12.9 14 20 19.4 20 9 11.4 11 20 21.2 20 13 13.1 12
    12-08-17 19 19.1 19 8 9.1 10 19 18.5 19 12 11.6 12 19 20.8 20 13 12.9 14 18 19.4 19 9 11.4 12
    11-08-17 19 17.9 19 11 12.7 12 18 19.1 18 9 9.1 10 19 18.5 20 12 11.6 12 21 20.8 20 13 12.9 15
    10-08-17 21 20.9 19 8 9.1 11 19 17.9 20 11 12.7 12 18 19.1 19 9 9.1 11 19 18.5 20 12 11.6 13
    09-08-17 18 15.7 17 9 9.0 10 20 20.9 19 10 9.1 11 18 17.9 19 13 12.7 12 19 19.1 20 9 9.1 11
    08-08-17 14 12.7 14 13 11.5 12 17 15.7 16 9 9.0 12 19 20.9 18 10 9.1 10 19 17.9 18 13 12.7 13
    07-08-17 19 18.7 20 11 11.0 13 16 12.7 17 12 11.5 13 17 15.7 18 9 9.0 10 19 20.9 21 10 9.1 11
    06-08-17 19 18.6 19 12 11.3 13 18 18.7 20 10 11.0 13 16 12.7 16 11 11.5 12 15 15.7 15 11 9.0 11
    05-08-17 19 17.3 19 8 9.7 10 19 18.6 20 13 11.3 14 18 18.7 20 9 11.0 13 17 12.7 17 11 11.5 12
    04-08-17 19 19.1 20 8 13.9 11 18 17.3 19 8 9.7 10 19 18.6 20 13 11.3 13 17 18.7 18 9 11.0 11
    03-08-17 19 18.9 20 13 16.5 15 19 19.1 20 9 13.9 11 18 17.3 19 8 9.7 10 18 18.6 19 11 11.3 13
    02-08-17 13 19.3 12 18 16.9 18 13 18.9 14 19 16.5 19 13 19.1 13 19 13.9 19 9 17.3 11 18 9.7 19
    01-08-17 18 13.6 20 11 19.0 13 19 19.3 19 13 16.9 13 19 18.9 19 13 16.5 13 19 19.1 21 11 13.9 12
    31-07-17 19 19.0 20 11 15.5 13 19 13.6 20 11 19.0 13 19 19.3 18 14 16.9 13 19 18.9 20 13 16.5 12
    30-07-17 19 18.7 20 12 15.6 12 19 19.0 19 11 15.5 11 19 13.6 20 11 19.0 11 19 19.3 20 14 16.9 15
    29-07-17 19 18.7 20 12 12.5 12 19 18.7 19 12 15.6 12 19 19.0 20 11 15.5 11 19 13.6 20 11 19.0 12
    Results NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    # Succ 17 18 14 16 16 15 12 11 15 13 12 13 13 14 11 13
    % Succ 85.0   90.0 70.0   80.0 84.2   78.9 63.2   57.9 83.3   72.2 66.7   72.2 76.5   82.4 64.7   76.5
    Ave Error 1.2   1.6 2.0   1.6 1.3   1.6 2.0   2.1 1.4   1.8 1.9   2.0 1.8   1.7 2.1   2.3
    Net Error 0.3   0.4 -1.4   -0.2 0.1   0.6 -1.4   -0.2 0.0   0.5 -1.0   -0.3 -0.4   0.4 -0.7   0.4
    Std Dev 1.6   1.8 2.0   1.3 1.6   1.6 2.0   1.4 1.4   1.4 1.4   1.4 1.9   1.5 2.0   2.0

    Midday Forecast
    Updated: 18-08-17 at 12:00 pm
    Goal Forecast Day Day +1 Day +2 Day +3
    ± 2.0° F High Low High Low High Low High Low
    Date NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    18-08-17 21   17 10   11 17   17 9   10 20   19 11   12 21   21 13   13
    16-08-17 24 22.1 21 14 12.2 14 23   23 12   13 17   18 11   11 18   18 10   12
    15-08-17 24 19.4 20 9 11.4 11 21 22.1 20 13 12.2 15 22   22 12   13 17   18 11   12
    14-08-17 22 20.8 19 13 12.9 14 20 19.4 20 9 11.4 11 21 22.1 20 13 12.2 14 21   22 12   12
    13-08-17 22 18.5 19 12 11.6 12 19 20.8 19 13 12.9 13 20 19.4 21 9 11.4 11 21 22.1 21 13 12.2 12
    12-08-17 20 19.1 18 8 9.1 11 19 18.5 19 12 11.6 12 19 20.8 19 13 12.9 14 19 19.4 20 9 11.4 12
    11-08-17 21 17.9 18 11 12.7 12 19 19.1 19 8 9.1 11 19 18.5 19 13 11.6 12 19 20.8 20 13 12.9 15
    10-08-17 24 20.9 20 8 9.1 10 19 17.9 19 11 12.7 12 18 19.1 18 9 9.1 11 19 18.5 20 12 11.6 14
    09-08-17 20 15.7 17 8 9.0 10 20 20.9 19 8 9.1 10 19 17.9 18 11 12.7 11 18 19.1 19 9 9.1 10
    08-08-17 16 12.7 14 13 11.5 12 16 15.7 17 9 9.0 10 19 20.9 19 9 9.1 11 18 17.9 20 12 12.7 14
    07-08-17 21 18.7 19 11 11.0 12 17 12.7 16 12 11.5 13 17 15.7 16 9 9.0 10 19 20.9 20 10 9.1 12
    06-08-17 24 18.6 19 13 11.3 13 19 18.7 20 11 11.0 13 17 12.7 16 12 11.5 13 17 15.7 18 10 9.0 11
    05-08-17 22 17.3 18 8 9.7 9 19 18.6 19 12 11.3 13 18 18.7 20 9 11.0 13 17 12.7 16 11 11.5 13
    04-08-17 24 19.1 19 8 13.9 10 18 17.3 19 8 9.7 10 19 18.6 19 13 11.3 14 18 18.7 18 9 11.0 12
    03-08-17 21 18.9 19 13 16.5 13 19 19.1 19 9 13.9 11 18 17.3 19 8 9.7 10 19 18.6 19 12 11.3 13
    02-08-17 21 19.3 19 13 16.9 13 19 18.9 19 13 16.5 13 19 19.1 20 9 13.9 13 18 17.3 19 8 9.7 10
    01-08-17 22 19.0 19 11 13.6 11 19 19.3 19 13 16.9 13 19 18.9 19 13 16.5 13 19 19.1 20 10 13.9 12
    31-07-17 24 19.0 19 11 15.5 11 19 19.0 19 11 13.6 11 19 19.3 19 13 16.9 12 19 18.9 19 13 16.5 13
    30-07-17 20 18.7 18 11 15.6 12 19 19.0 19 11 15.5 11 19 19.0 19 11 13.6 11 19 19.3 19 14 16.9 13
    29-07-17 20 18.7 19 12 12.5 12 19 18.7 19 12 15.6 12 19 19.0 19 11 15.5 11 21 19.0 20 11 13.6 11
    28-07-17 21 20.0 20 12 11.6 12 20 18.7 19 12 12.5 12 19 18.7 20 11 15.6 12 19 19.0 20 11 15.5 12
    Results NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    # Succ 7 20 13 14 18 17 12 12 17 16 11 12 16 14 11 10
    % Succ 35.0   100.0 65.0   70.0 94.7   89.5 63.2   63.2 94.4   88.9 61.1   66.7 94.1   82.4 64.7   58.8
    Ave Error 2.9   0.6 2.0   1.8 0.7   0.9 1.8   1.9 0.9   1.0 2.0   2.0 1.0   1.1 1.7   1.9
    Net Error 2.9   -0.0 -1.4   -0.7 0.3   0.2 -1.5   -0.5 0.1   0.2 -1.5   -0.4 0.1   0.6 -1.2   0.1
    Std Dev 1.4   0.5 1.6   1.3 1.0   0.9 1.5   1.2 0.9   0.8 1.4   1.1 0.9   0.8 1.0   0.8

    Mid Afternoon Forecast
    Updated: 17-08-17 at 5:00 pm
    Goal Forecast Day Day +1 Day +2 Day +3
    ± 2.0° F Low High Low High Low High Low High
    Date NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    17-08-17 13   14 17   18 11   12 18   18 9   10 19   21 13   14 21   19
    16-08-17 14 13.1 15 23 21.2 23 13   13 17   18 11   12 18   18 9   12 18   18
    15-08-17 9 11.4 11 21 19.4 20 13 13.1 14 22 21.2 23 12   14 17   18 11   11 18   18
    14-08-17 13 12.9 15 21 20.8 20 9 11.4 12 21 19.4 20 13 13.1 13 22 21.2 22 11   12 17   18
    13-08-17 12 11.6 12 19 18.5 19 13 12.9 12 20 20.8 21 9 11.4 11 21 19.4 21 13 13.1 13 20 21.2 21
    12-08-17 9 9.1 11 19 19.1 19 12 11.6 12 20 18.5 19 13 12.9 14 19 20.8 20 9 11.4 12 20 19.4 21
    11-08-17 11 12.7 12 18 17.9 19 8 9.1 11 19 19.1 19 12 11.6 12 19 18.5 20 13 12.9 15 19 20.8 19
    10-08-17 8 9.1 11 19 20.9 19 11 12.7 12 18 17.9 19 9 9.1 12 19 19.1 20 12 11.6 14 19 18.5 19
    09-08-17 8 9.0 10 20 15.7 19 8 9.1 10 19 20.9 18 12 12.7 11 18 17.9 19 9 9.1 10 19 19.1 20
    08-08-17 12 11.5 12 16 12.7 17 8 9.0 10 19 15.7 19 9 9.1 11 18 20.9 20 12 12.7 14 19 17.9 20
    07-08-17 11 11.0 12 17 18.7 16 13 11.5 12 16 12.7 16 9 9.0 10 19 15.7 20 10 9.1 12 19 20.9 19
    06-08-17 13 11.3 13 19 18.6 20 11 11.0 13 16 18.7 16 12 11.5 13 16 12.7 18 10 9.0 11 18 15.7 19
    05-08-17 8 9.7 9 19 17.3 19 12 11.3 13 18 18.6 20 9 11.0 13 17 18.7 16 11 11.5 13 16 12.7 17
    04-08-17 8 13.9 10 18 19.1 18 8 9.7 10 19 17.3 20 13 11.3 14 18 18.6 18 9 11.0 13 18 18.7 19
    03-08-17 13 16.5 13 19 18.9 19 8 13.9 10 18 19.1 19 8 9.7 10 19 17.3 19 12 11.3 13 16 18.6 16
    02-08-17 13 16.9 13 19 19.3 20 13 16.5 13 19 18.9 20 9 13.9 13 18 19.1 19 8 9.7 10 18 17.3 18
    01-08-17 11 13.6 10 19 19.0 19 13 16.9 13 19 19.3 19 13 16.5 13 19 18.9 20 10 13.9 12 18 19.1 18
    31-07-17 11 15.5 11 19 19.0 19 11 13.6 11 19 19.0 19 13 16.9 12 19 19.3 19 13 16.5 13 19 18.9 20
    30-07-17 11 15.6 12 19 18.7 19 11 15.5 12 19 19.0 19 11 13.6 11 19 19.0 20 14 16.9 13 18 19.3 20
    29-07-17 12 12.5 12 20 18.7 19 12 15.6 12 19 18.7 19 11 15.5 11 20 19.0 20 11 13.6 11 20 19.0 19
    28-07-17 12 11.6 12 20 20.0 19 12 12.5 12 19 18.7 20 11 15.6 12 19 18.7 20 11 15.5 12 19 19.0 19
    Results NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    # Succ 13 13 18 17 12 13 16 14 11 11 15 15 11 10 14 13
    % Succ 65.0   65.0 90.0   85.0 63.2   68.4 84.2   73.7 61.1   61.1 83.3   83.3 64.7   58.8 82.4   76.5
    Ave Error 1.9   1.9 1.0   1.2 1.9   1.8 1.1   1.2 1.9   2.0 1.2   1.5 1.6   2.0 1.2   1.4
    Net Error -1.5   -0.6 0.5   0.4 -1.6   -0.7 0.3   0.6 -1.6   -0.5 0.2   0.9 -1.3   0.1 -0.1   0.5
    Std Dev 1.7   1.3 1.1   1.1 1.6   1.2 1.0   1.1 1.4   1.2 1.0   1.3 1.0   0.8 0.8   1.1

    Night Time Forecast
    Updated: 17-08-17 at 9:00 pm
    Goal Forecast Day Day +1 Day +2 Day +3
    ± 2.0° F Low High Low High Low High Low High
    Date NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    17-08-17 12   13 17   18 11   11 18   17 9   10 19   20 13   14 23   23
    16-08-17 14 13.1 14 23 21.2 22 13   14 17   18 11   12 18   18 9   12 18   18
    15-08-17 9 11.4 11 22 19.4 21 14 13.1 15 22 21.2 23 12   14 17   17 11   13 18   19
    14-08-17 13 12.9 15 21 20.8 21 9 11.4 12 21 19.4 21 13 13.1 14 22 21.2 22 12   13 17   18
    13-08-17 12 11.6 11 18 18.5 17 13 12.9 13 20 20.8 21 10 11.4 12 21 19.4 21 13 13.1 12 21 21.2 21
    12-08-17 8 9.1 11 19 19.1 18 12 11.6 12 20 18.5 20 13 12.9 14 19 20.8 20 9 11.4 12 20 19.4 20
    11-08-17 11 12.7 13 18 17.9 19 8 9.1 11 19 19.1 19 12 11.6 11 19 18.5 18 13 12.9 14 18 20.8 18
    10-08-17 8 9.1 10 19 20.9 18 11 12.7 12 18 17.9 19 9 9.1 11 19 19.1 20 12 11.6 13 20 18.5 21
    09-08-17 8 9.0 9 21 15.7 19 8 9.1 10 19 20.9 20 12 12.7 13 18 17.9 20 9 9.1 11 19 19.1 20
    08-08-17 11 11.5 12 17 12.7 17 8 9.0 10 20 15.7 19 8 9.1 11 19 20.9 17 12 12.7 14 19 17.9 19
    07-08-17 11 11.0 12 16 18.7 14 13 11.5 13 16 12.7 17 9 9.0 10 20 15.7 19 10 9.1 11 19 20.9 18
    06-08-17 12 11.3 13 19 18.6 20 11 11.0 12 16 18.7 17 12 11.5 12 16 12.7 18 10 9.0 10 18 15.7 19
    05-08-17 8 9.7 9 19 17.3 19 12 11.3 13 18 18.6 20 9 11.0 12 17 18.7 17 11 11.5 11 16 12.7 16
    04-08-17 8 13.9 9 19 19.1 18 8 9.7 9 19 17.3 19 13 11.3 13 18 18.6 19 9 11.0 13 18 18.7 16
    03-08-17 13 16.5 13 19 18.9 19 9 13.9 11 18 19.1 19 8 9.7 10 19 17.3 20 12 11.3 13 17 18.6 20
    02-08-17 13 16.9 13 19 19.3 20 13 16.5 14 19 18.9 20 9 13.9 11 19 19.1 19 8 9.7 10 18 17.3 19
    01-08-17 11 13.6 12 18 19.0 18 13 16.9 14 19 19.3 19 13 16.5 13 19 18.9 19 10 13.9 11 18 19.1 19
    31-07-17 10 15.5 12 18 19.0 19 11 13.6 12 19 19.0 19 13 16.9 13 19 19.3 19 13 16.5 13 19 18.9 20
    30-07-17 11 15.6 12 19 18.7 19 11 15.5 12 18 19.0 19 11 13.6 11 20 19.0 17 14 16.9 13 19 19.3 19
    29-07-17 12 12.5 12 19 18.7 19 12 15.6 12 19 18.7 20 11 15.5 11 19 19.0 19 11 13.6 12 19 19.0 18
    28-07-17 12 11.6 12 20 20.0 19 12 12.5 12 19 18.7 19 11 15.6 12 19 18.7 20 11 15.5 11 19 19.0 19
    Results NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS NW Act WS
    # Succ 13 14 16 16 12 14 16 17 12 12 16 13 11 13 14 11
    % Succ 65.0   70.0 80.0   80.0 63.2   73.7 84.2   89.5 66.7   66.7 88.9   72.2 64.7   76.5 82.4   64.7
    Ave Error 1.9   1.6 1.2   1.5 1.9   1.6 1.2   1.2 1.9   1.8 1.1   1.5 1.6   1.8 1.1   1.5
    Net Error -1.7   -0.7 0.5   0.1 -1.5   -0.4 0.3   0.9 -1.6   -0.6 0.4   0.5 -1.3   -0.3 0.1   0.3
    Std Dev 1.7   1.4 1.4   1.3 1.4   0.9 1.1   1.1 1.4   1.1 1.1   1.4 1.0   0.7 0.9   1.0

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