WXSIM: Chelmer Village
Updated: Wednesday, 22.05.2019 18:00
 
Tonight

Partly Cloudy
Partly Cloudy
Thursday

Partly Cloudy
Partly Cloudy
Thursday
night
Partly Cloudy
Partly Cloudy
Friday

Chance rain
Chance rain
Friday
night
Partly Cloudy
Partly Cloudy
Saturday

Partly Cloudy
Partly Cloudy
Saturday
night
Partly Cloudy
Partly Cloudy
Sunday

Mostly Cloudy
Mostly Cloudy
Sunday
night
Partly Cloudy
Partly Cloudy
<2 mm. <2 mm. 2 mm. <2 mm. <2 mm. <2 mm. <2 mm.
Low: 8° High: 24° Low: 9° High: 22° Low: 9° High: 23° Low: 9° High: 24° Low: 8°



























 

WU Forecast: Chelmsford

Tonight
Partly Cloudy
Partly Cloudy
Tomorrow
Mostly Cloudy
Mostly Cloudy
Tomorrow night
Partly Cloudy
Partly Cloudy
Friday
Partly Cloudy
Partly Cloudy
Friday night
Partly Cloudy
Partly Cloudy
Saturday
Mostly Cloudy
Mostly Cloudy
Saturday night
Clouds Early, Clearing Late
Clouds Early, Clearing Late
Sunday
Mostly Cloudy
Mostly Cloudy
Sunday night
Showers Early
Showers Early
7°C22°C10°C21°C10°C20°C10°C22°C10°C

WXSIM Forecast Accuracy

Actual Observed (Act), WxSim Generated (WS) , Weather Underground (WU)

Morning

Updated: 05-22-19 at 6:00 am
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
05-22-19 20   22 9   9 22   23 10   9 22   23 11   10 22   23 12   10
05-21-19 21 23 22 9 8 7 21   22 9   9 22   23 11   9 21   23 11   9
05-20-19 20 22 9 9 8 22 21 23 8 9 8 22 21   8 10   22 21   10 11   22
05-19-19 19 11 20 11 18 9 20 22 23 9 8 9 21 23 22 9 8 7 21   21 9   9
05-18-19 18 21 20 9 8 9 19 11 21 11 18 8 19 22 23 9 8 9 20 23 20 8 8 11
05-17-19 16 15 16 9 10 9 18 21 19 9 8 9 20 11 21 11 18 9 20 22 22 9 8 8
05-16-19 17 19 16 8 9 7 16 15 16 9 10 8 18 21 20 10 8 8 20 11 19 11 18 9
05-15-19 20 20 19 7 6 6 18 19 17 9 9 8 16 15 16 10 10 9 18 21 19 10 8 10
05-14-19 18 18 17 7 5 5 20 20 19 7 6 6 18 19 18 9 9 9 17 15 16 10 10 9
05-13-19 17 17 16 6 4 5 18 18 18 7 5 6 19 20 19 7 6 5 18 19 17 8 9 9
05-12-19 16 19 16 5 3 3 17 17 17 6 4 5 17 18 17 6 5 6 17 20 17 6 6 6
05-11-19 15 16 16 5 4 5 17 19 17 5 3 4 17 17 16 6 4 5 17 18 16 7 5 6
05-10-19 16 18 18 8 8 7 15 16 17 6 4 3 17 19 17 6 3 3 16 17 16 6 4 4
05-09-19 15 18 16 6 8 5 16 18 17 7 8 6 15 16 16 6 4 3 16 19 15 6 3 3
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 9 9 12 10 10 10 11 10 8 10 9 10 5 6 8 8
% Succ 69.2   69.2 92.3   76.9 83.3   83.3 91.7   83.3 72.7   90.9 81.8   90.9 50.0   60.0 80.0   80.0
Ave Error 2.1   2.8 1.7   2.6 1.8   3.0 1.8   2.9 2.2   1.8 1.8   1.5 2.8   2.6 1.8   1.6
Net Error -0.7   -1.2 0.0   0.0 -0.3   -0.8 0.3   0.3 -0.4   0.4 0.5   -0.9 -0.6   -0.8 0.2   -0.4
Std Dev 2.1   3.8 1.7   4.1 2.2   4.5 1.8   4.3 2.5   2.7 2.0   2.5 2.7   2.6 2.2   2.7

Afternoon

Updated: 05-22-19 at 6:00 pm
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
05-22-19 9   8 22   24 10   9 22   22 11   9 21   23 11   9 22   24
05-21-19 10 8 7 21 24 21 9   8 22   23 11   9 21   23 11   10 21   23
05-20-19 9 8 9 21 23 22 9 8 7 21 24 21 9   9 21   23 11   11 20   19
05-19-19 11 11 9 21 22 22 10 8 8 21 23 22 9 8 9 21 24 22 10   9 21   24
05-18-19 10 8 8 18 18 21 11 11 8 19 22 22 9 8 9 20 23 21 9 8 7 20 24 20
05-17-19 9 10 7 18 21 20 9 8 8 20 18 21 11 11 8 20 22 22 10 8 9 20 23 22
05-16-19 8 9 7 15 15 15 9 10 9 18 21 21 9 8 8 20 18 22 11 11 9 21 22 23
05-15-19 8 6 6 18 19 17 9 9 7 16 15 17 10 10 8 19 21 21 10 8 9 20 18 22
05-14-19 7 5 6 20 20 19 7 6 6 18 19 17 9 9 8 16 15 15 10 10 10 18 21 16
05-13-19 6 4 6 18 18 18 7 5 6 20 20 19 7 6 6 17 19 18 9 9 8 17 15 18
05-12-19 5 3 4 17 17 18 6 4 5 18 18 18 6 5 5 18 20 18 6 6 5 18 19 18
05-11-19 5 4 5 17 19 17 5 3 4 17 17 17 6 4 5 17 18 17 7 5 6 18 20 19
05-10-19 8 8 8 15 16 15 5 4 5 17 19 16 5 3 4 16 17 16 6 4 5 16 18 17
05-09-19 6 8 5 16 18 17 7 8 7 15 16 16 6 4 4 16 19 16 6 3 4 16 17 16
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 13 11 11 11 12 11 9 9 11 10 8 9 9 10 7 6
% Succ 100.0   84.6 84.6   84.6 100.0   91.7 75.0   75.0 100.0   90.9 72.7   81.8 90.0   100.0 70.0   60.0
Ave Error 1.4   1.3 1.2   1.2 1.2   1.0 1.5   1.3 1.0   0.9 2.0   1.5 1.2   1.0 2.1   2.2
Net Error 0.8   -0.4 -1.2   -0.6 0.8   -0.3 -1.0   -0.4 1.0   -0.2 -1.5   -0.7 1.2   0.0 -1.3   -0.6
Std Dev 0.8   0.9 1.1   1.0 0.8   0.9 1.3   1.2 0.7   1.0 1.2   1.4 1.1   0.8 1.6   1.9