WXSIM: Chelmer Village
Updated: Monday, 18.01.2021 18:00
 
Tonight

Rain likely
Rain likely
Tuesday

Overcast
Overcast
Tuesday
night
Rain likely
Rain likely
Wednesday

Rain likely
Rain likely
Wednesday
night
Rain likely
Rain likely
Thursday

Mostly Cloudy
Mostly Cloudy
Thursday
night
Mostly Cloudy
Mostly Cloudy
Friday

Mostly Sunny
Mostly Sunny
Friday
night
Mostly Cloudy
Mostly Cloudy
15 mm. <2 mm. 7 mm. <5 mm. 5 mm. <2 mm. <2 mm.
Low: 5° High: 11° Low: 9° High: 11° Low: 4° High: 9° Low: 0° High: 7° Low: 1°



























 

WU Forecast: Chelmsford

Tonight
Light Rain Late
Light Rain Late
Tomorrow
Cloudy, Wind
Cloudy, Wind
Tomorrow night
Light Rain, Wind
Light Rain, Wind
Wednesday
Showers, Wind
Showers, Wind
Wednesday night
Rain, Wind
Rain, Wind
Thursday
PM Showers
PM Showers
Thursday night
Showers Early
Showers Early
Friday
Partly Cloudy
Partly Cloudy
Friday night
Rain, Snow Showers Late
Rain, Snow Showers Late
8°C12°C9°C10°C3°C8°C1°C6°C1°C

WXSIM Forecast Accuracy

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

Morning Forecast

Updated: 01-18-21 at 9:10 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
01-18-21 8   8 7   5 12   11 10   10 11   10 4   4 8   9 2   4
01-17-21 7 7.2 7 3 1.4 1 9   7 7   5 12   12 10   9 11   11 4   4
01-16-21 10 6.5 9 3 4.3 2 8 7.2 7 2 1.4 1 8   7 7   5 11   11 10   9
01-15-21 4 4.4 5 0 -0.7 0 8 6.5 7 3 4.3 0 7 7.2 7 1 1.4 0 8   6 6   3
01-14-21 7 4.4 5 0 0.9 0 3 4.4 5 0 -0.7 0 7 6.5 6 3 4.3 1 7 7.2 7 3 1.4 0
01-13-21 10 5.9 5 7 2.6 2 9 4.4 6 0 0.9 -1 4 4.4 5 0 -0.7 0 7 6.5 5 4 4.3 4
01-12-21 9 6.4 7 0 -0.1 1 8 5.9 5 4 2.6 4 6 4.4 5 2 0.9 2 5 4.4 4 2 -0.7 1
01-11-21 8 8.5 7 7 6.4 5 10 6.4 7 0 -0.1 -1 11 5.9 9 6 2.6 8 7 4.4 10 3 0.9 1
01-10-21 4 3.1 5 17 2.8 0 6 8.5 7 17 6.4 5 7 6.4 7 18 -0.1 0 8 5.9 10 20 2.6 6
01-09-21 2 3.6 5 -2 -2.7 -3 4 3.1 5 1 2.8 -1 8 8.5 8 6 6.4 4 7 6.4 5 0 -0.1 -1
01-08-21 2 0.8 4 -3 -1.8 -2 4 3.6 5 -4 -2.7 -3 4 3.1 4 0 2.8 -1 7 8.5 6 5 6.4 3
01-07-21 2 3.4 4 -2 -2.8 0 3 0.8 4 -3 -1.8 -3 4 3.6 4 -2 -2.7 -3 5 3.1 5 0 2.8 -1
01-06-21 5 5.7 5 -2 -0.1 -1 2 3.4 3 -2 -2.8 -1 3 0.8 3 -4 -1.8 -2 4 3.6 5 -3 -2.7 -2
01-05-21 5 3.9 4 3 2.9 2 5 5.7 5 -1 -0.1 -1 3 3.4 3 -1 -2.8 -1 2 0.8 4 -1 -1.8 -2
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 11 11 10 7 11 11 10 9 9 7 7 8 6 6 7
% Succ 69.2   84.6 84.6   76.9 58.3   91.7 91.7   83.3 81.8   81.8 63.6   63.6 80.0   60.0 60.0   70.0
Ave Error 1.6   1.1 2.2   1.2 1.8   1.1 1.8   1.6 1.2   0.9 3.0   1.9 1.2   2.2 3.0   1.6
Net Error 0.9   0.6 1.4   -0.5 0.8   0.5 0.6   -0.9 0.9   0.6 1.7   -0.2 0.8   1.0 2.0   -0.4
Std Dev 1.3   0.9 3.6   0.9 1.4   0.9 2.8   1.4 1.4   0.9 5.0   1.8 1.0   2.1 5.1   1.3