WxSim & WU Forecast Comparison

WesterhopeWX uses WXSim to produce a local forecast using the data gathered from the weather station and supplemented by other weather stations and weather buoys at 06:00, 11:00, 15:00, and 21:00. The following tables compare the accuracy of the temperature forecasts produced by Weather Underground and WXSim against the actual high and low temperature recorded by this weather station.

Morning Forecast @ 06:00

Weather Underground (WU), Actual Observed (Act), WxSim Generated (WS)
Updated: 18-12-18 at 05:52
Goal Forecast Day Day +1 Day +2 Day +3
± 2.0°C High Low High Low High Low High Low
Date WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
18-12-18 9   11 3   5 7   7 4   4 8   8 3   4 7   9 4   3
17-12-18 6 -100 6 4 100 3 9   10 3   7 7   8 4   3 7   8 2   3
16-12-18 6 -100 7 1 100 3 6 -100 7 5 100 6 9   12 3   6 7   8 3   4
14-12-18 3 -100 4 -1 100 -1 3 -100 4 1 100 1 6 -100 7 1 100 4 6   7 5   4
13-12-18 6 -100 5 -1 100 0 3 -100 4 -1 100 0 2 -100 4 2 100 2 6 -100 7 1 100 1
12-12-18 6 -100 7 2 100 2 5 -100 5 -1 100 1 3 -100 4 -1 100 1 3 -100 4 3 100 3
11-12-18 5 -100 7 3 100 4 6 -100 8 2 100 1 6 -100 6 0 100 2 3 -100 5 0 100 4
09-12-18 6 -100 7 0 100 1 4 -100 6 0 100 3 6 -100 9 3 100 6 6 -100 8 3 100 4
08-12-18 8 -100 10 3 100 5 6 -100 7 1 100 1 4 -100 6 1 100 2 7 -100 10 4 100 7
07-12-18 11 -100 11 6 100 5 8 -100 10 4 100 7 6 -100 8 1 100 0 5 -100 6 1 100 4
06-12-18 13 -100 12 8 100 9 11 -100 11 6 100 5 8 -100 7 4 100 5 6 -100 8 0 100 2
03-12-18 7 -100 9 -1 100 2 5 -100 6 -1 100 4 6 -100 7 4 100 5 11 -100 8 7 100 6
02-12-18 10 -100 9 4 100 7 7 -100 9 -2 100 3 5 -100 6 1 100 4 6 -100 7 3 100 5
30-11-18 8 -100 8 4 100 4 7 -100 7 3 100 4 8 -100 8 4 100 5 7 -100 12 0 100 4
Results WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
# Succ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
% Succ     0.0     0.0     0.0     0.0     0.0     0.0     0.0     0.0
Ave Error 107.3   107.8 97.5   96.6 105.9   107.0 98.6   97.0 105.5   106.5 98.2   96.7 106.0   107.5 97.8   96.0
Net Error 107.3   107.8 -97.5   -96.6 105.9   107.0 -98.6   -97.0 105.5   106.5 -98.2   -96.7 106.0   107.5 -97.8   -96.0
Std Dev 2.6   2.2 2.7   2.6 2.1   2.0 2.2   2.1 1.6   1.4 1.3   1.7 1.4   1.7 1.1   1.4

Afternoon Forecast @ 11:00

Weather Underground (WU), Actual Observed (Act), WxSim Generated (WS)
Updated: 18-12-18 at 10:52
Goal Forecast Day Day +1 Day +2 Day +3
± 2.0°C High Low High Low High Low High Low
Date WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
18-12-18 10   10 4   5 7   7 4   4 8   8 3   4 7   9 4   3
17-12-18 7 -100 7 5 100 4 9   9 3   4 7   7 4   3 7   7 2   2
15-12-18 2 -100 4 1 100 1 6 -100 7 1 100 4 6   7 4   4 9   11 4   7
13-12-18 6 -100 6 -1 100 0 3 -100 4 -1 100 0 2 -100 4 2 100 2 6   7 1   1
12-12-18 7 -100 6 2 100 2 5 -100 5 -1 100 1 3 -100 4 -1 100 1 3 -100 4 2 100 3
11-12-18 6 -100 7 2 100 3 6 -100 8 2 100 2 5 -100 6 -1 100 3 3 -100 5 -1 100 4
08-12-18 8 -100 10 2 100 6 6 -100 7 0 100 1 4 -100 6 1 100 2 7 -100 10 4 100 7
07-12-18 8 -100 8 6 100 4 8 -100 10 3 100 6 6 -100 8 1 100 0 5 -100 6 0 100 4
06-12-18 13 -100 14 8 100 10 10 -100 12 6 100 5 8 -100 7 4 100 5 6 -100 8 0 100 2
04-12-18 5 -100 5 -1 100 4 7 -100 7 4 100 5 12 -100 12 8 100 9 11 -100 12 5 100 10
03-12-18 6 -100 7 -1 100 2 5 -100 6 -1 100 4 7 -100 8 4 100 6 12 -100 8 6 100 6
02-12-18 10 -100 9 5 100 7 7 -100 9 -2 100 3 5 -100 7 1 100 4 6 -100 8 2 100 6
30-11-18 8 -100 10 4 100 5 7 -100 8 3 100 4 9 -100 8 5 100 6 8 -100 12 0 100 4
29-11-18 12 -100 13 6 100 6 8 -100 9 4 100 4 8 -100 9 4 100 6 7 -100 9 4 100 6
Results WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
# Succ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
% Succ     0.0     0.0     0.0     0.0     0.0     0.0     0.0     0.0
Ave Error 107.5   108.2 97.1   95.8 106.5   107.7 98.5   96.8 106.3   107.2 97.5   96.0 106.8   108.2 97.8   94.8
Net Error 107.5   108.2 -97.1   -95.8 106.5   107.7 -98.5   -96.8 106.3   107.2 -97.5   -96.0 106.8   108.2 -97.8   -94.8
Std Dev 2.5   2.5 2.7   2.5 1.6   2.1 2.3   1.8 2.6   2.1 2.4   2.4 2.2   2.2 1.8   2.1

Evening Forecast @ 15:00

Weather Underground (WU), Actual Observed (Act), WxSim Generated (WS)
Updated: 17-12-18 at 14:52
Goal Forecast Day Day +1 Day +2 Day +3
± 2.0°C High Low High Low High Low High Low
Date WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
17-12-18 7   6 5   5 9   11 3   6 7   7 4   3 7   6 2   3
15-12-18 2 -100 2 1 100 1 6   7 1   3 6   7 4   6 9   12 4   7
14-12-18 4 -100 3 -1 100 0 2 -100 4 1 100 2 6   7 1   3 6   7 5   5
13-12-18 6 -100 6 -1 100 0 3 -100 4 -1 100 0 3 -100 4 1 100 1 6   7 1   1
12-12-18 7 -100 6 2 100 2 5 -100 5 -1 100 0 3 -100 4 -1 100 0 3 -100 4 2 100 2
11-12-18 6 -100 6 2 100 3 6 -100 7 2 100 2 5 -100 5 -1 100 2 3 -100 5 -1 100 2
10-12-18 n/a -100 4 -1 100 1 5 -100 7 3 100 5 6 -100 9 2 100 3 5 -100 5 0 100 1
08-12-18 9 -100 7 2 100 4 6 -100 7 0 100 1 4 -100 6 1 100 3 7 -100 10 4 100 7
07-12-18 12 -100 7 6 100 4 8 -100 9 3 100 5 6 -100 8 1 100 1 5 -100 6 1 100 3
06-12-18 12 -100 12 8 100 9 10 -100 11 6 100 4 8 -100 7 4 100 5 6 -100 7 1 100 2
05-12-18 6 -100 7 4 100 5 13 -100 13 8 100 10 11 -100 13 5 100 8 8 -100 10 4 100 7
30-11-18 8 -100 8 4 100 3 7 -100 6 3 100 4 8 -100 9 5 100 7 8 -100 11 0 100 5
28-11-18 12 -100 13 7 100 9 12 -100 11 6 100 7 8 -100 10 4 100 5 8 -100 10 3 100 6
27-11-18 6 -100 6 4 100 5 14 -100 11 7 100 8 11 -100 13 5 100 7 8 -100 9 3 100 4
Results WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
# Succ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
% Succ     0.0     0.0     0.0     0.0     0.0     0.0     0.0     0.0
Ave Error 107.5   106.7 97.2   96.5 107.6   107.9 96.9   96.0 106.6   108.0 97.6   96.2 106.1   107.7 98.3   96.1
Net Error 107.5   106.7 -97.2   -96.5 107.6   107.9 -96.9   -96.0 106.6   108.0 -97.6   -96.2 106.1   107.7 -98.3   -96.1
Std Dev 2.8   3.0 2.9   2.8 3.0   2.6 2.6   2.7 2.3   2.6 1.9   2.2 1.5   1.9 1.3   1.7

Night Forecast @ 21:00

Weather Underground (WU), Actual Observed (Act), WxSim Generated (WS)
Updated: 16-12-18 at 20:52
Goal Forecast Day Day +1 Day +2 Day +3
± 2.0°C Low High Low High Low High Low High
Date WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
16-12-18 1   4 6   7 4   5 9   11 3   6 7   8 3   3 7   7
14-12-18 -1 100 0 2 -100 4 1   1 6   7 1   3 6   6 4   3 9   11
12-12-18 2 100 1 6 -100 5 -1 100 0 3 -100 4 -1   1 3   5 2   2 6   8
10-12-18 0 100 1 5 -100 7 3 100 3 6 -100 9 2 100 2 5 -100 6 0   0 3   4
09-12-18 1 100 1 4 -100 5 -1 100 0 5 -100 7 3 100 4 6 -100 9 2 100 5 4 -100 7
07-12-18 7 100 7 8 -100 10 3 100 6 6 -100 8 1 100 1 5 -100 5 2 100 2 7 -100 8
06-12-18 8 100 8 11 -100 11 6 100 8 8 -100 10 4 100 6 6 -100 8 1 100 2 4 -100 5
04-12-18 -1 100 2 7 -100 7 4 100 4 12 -100 11 7 100 9 11 -100 12 5 100 6 8 -100 9
03-12-18 -1 100 1 5 -100 6 -1 100 4 7 -100 6 4 100 6 12 -100 11 7 100 8 10 -100 11
30-11-18 3 100 4 6 -100 7 3 100 6 11 -100 12 3 100 7 7 -100 9 0 100 1 6 -100 6
29-11-18 6 100 8 8 -100 10 4 100 5 8 -100 9 3 100 6 8 -100 8 4 100 6 7 -100 10
27-11-18 5 100 5 14 -100 11 7 100 9 11 -100 11 6 100 8 8 -100 9 3 100 4 7 -100 8
26-11-18 2 100 3 6 -100 6 5 100 4 13 -100 12 8 100 9 12 -100 11 6 100 7 8 -100 9
25-11-18 3 100 3 7 -100 5 2 100 1 6 -100 5 5 100 3 12 -100 10 7 100 7 11 -100 11
Results WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
# Succ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
% Succ     0.0     0.0     0.0     0.0     0.0     0.0     0.0     0.0
Ave Error 97.4   96.6 106.8   107.2 97.2   95.8 108.0   108.7 95.8   94.5 108.4   108.9 96.3   95.2 107.2   108.4
Net Error -97.4   -96.6 106.8   107.2 -97.2   -95.8 108.0   108.7 -95.8   -94.5 108.4   108.9 -96.3   -95.2 107.2   108.4
Std Dev 3.0   2.7 2.9   2.3 2.5   2.6 2.5   2.2 1.6   2.1 2.3   1.9 2.0   2.0 1.7   1.6