WXSIM: Chelmer Village
Updated: Tuesday, 31.03.2020 18:00
 
Tonight

Mostly Clear
Mostly Clear
Wednesday

Mostly Cloudy
Mostly Cloudy
Wednesday
night
Partly Cloudy
Partly Cloudy
Thursday

Partly Cloudy
Partly Cloudy
Thursday
night
Fog late
Fog late
Friday

Partly Cloudy
Partly Cloudy
Friday
night
Partly Cloudy
Partly Cloudy
Saturday

Partly Cloudy
Partly Cloudy
Saturday
night
Mostly Cloudy
Mostly Cloudy
<2 mm. <2 mm. <2 mm. <2 mm. <2 mm.
Low: -1° High: 11° Low: 2° High: 14° Low: 3° High: 12° Low: 5° High: 15° Low: 5°



























 

WU Forecast: Chelmsford

Tonight
Clear
Clear
Tomorrow
Mostly Cloudy
Mostly Cloudy
Tomorrow night
Partly Cloudy
Partly Cloudy
Thursday
Mostly Cloudy
Mostly Cloudy
Thursday night
Partly Cloudy
Partly Cloudy
Friday
Mostly Cloudy
Mostly Cloudy
Friday night
Mostly Cloudy
Mostly Cloudy
Saturday
Partly Cloudy
Partly Cloudy
Saturday night
Partly Cloudy
Partly Cloudy
-2°C10°C2°C13°C4°C11°C3°C13°C6°C

WXSIM Forecast Accuracy

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

Morning

Updated: 03-31-20 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
03-31-20 11   11 -1   -1 11   11 3   3 14   14 4   2 11   12 4   4
03-30-20 10 12 11 3 2 1 11   12 0   0 11   12 3   3 13   15 3   0
03-29-20 8 8 10 1 2 0 11 12 10 3 2 0 12   12 0   0 11   11 3   3
03-28-20 13 11 14 3 3 1 9 8 9 1 2 0 10 12 11 4 2 2 11   12 2   1
03-27-20 14 15 14 4 5 4 13 11 13 3 3 1 9 8 10 1 2 0 10 12 11 3 2 1
03-26-20 13 14 11 1 2 1 14 15 13 4 5 3 12 11 13 4 3 3 9 8 10 2 2 2
03-25-20 13 13 11 0 -2 1 13 14 12 1 2 1 14 15 14 4 5 4 12 11 13 3 3 2
03-24-20 15 15 13 1 -2 2 14 13 12 1 -2 2 13 14 12 0 2 1 13 15 14 5 5 6
03-23-20 12 11 11 2 -2 2 14 15 13 2 -2 2 13 13 12 0 -2 1 12 14 12 1 2 0
03-22-20 10 11 10 2 2 3 12 11 11 2 -2 2 13 15 13 1 -2 2 12 13 12 0 -2 2
03-21-20 10 10 9 3 2 3 10 11 10 2 2 2 11 11 11 1 -2 2 12 15 13 1 -2 2
03-20-20 10 11 11 4 3 4 10 10 10 3 2 3 9 11 10 1 2 2 10 11 11 1 -2 2
03-19-20 9 9 10 5 6 5 10 11 10 5 3 3 10 10 11 4 2 3 9 11 10 2 2 3
03-18-20 14 16 16 7 6 7 9 9 9 5 6 4 9 11 10 4 3 2 10 10 11 4 2 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 13 11 11 10 12 12 9 9 11 11 9 8 9 10 8 7
% Succ 100.0   84.6 84.6   76.9 100.0   100.0 75.0   75.0 100.0   100.0 81.8   72.7 90.0   100.0 80.0   70.0
Ave Error 0.8   1.3 1.3   1.8 0.9   1.2 1.6   2.0 1.1   1.3 1.7   1.5 1.5   1.3 1.2   2.0
Net Error -0.4   -0.4 0.7   0.5 -0.1   -0.7 0.9   0.2 -0.7   -0.4 0.8   0.6 -1.1   -0.3 1.0   1.2
Std Dev 0.7   1.0 1.1   1.2 0.6   0.9 1.5   1.5 0.8   0.9 1.1   1.6 1.0   0.9 1.0   1.6

Afternoon

Updated: 03-31-20 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
03-31-20 -1   -1 11   11 3   2 14   14 4   3 11   12 4   5 15   15
03-30-20 4 2 2 11 11 12 0   -1 12   12 3   1 14   15 3   5 12   12
03-29-20 1 2 -1 10 12 11 3 2 2 11 11 11 0   0 11   11 3   2 13   15
03-28-20 2 3 1 8 8 9 1 2 0 11 12 10 3 2 0 11 11 12 1   1 10   11
03-27-20 4 5 4 14 11 13 3 3 2 9 8 10 2 2 1 11 12 11 3 2 1 10 11 12
03-26-20 1 2 2 14 15 14 4 5 4 13 11 13 3 3 2 9 8 10 2 2 1 10 12 10
03-25-20 0 -2 2 13 14 13 1 2 1 14 15 14 3 5 4 12 11 13 3 3 2 9 8 10
03-24-20 1 -2 2 14 13 12 0 -2 2 13 14 12 0 2 2 14 15 15 4 5 4 11 11 11
03-23-20 2 -2 12 14 15 2 1 -2 14 13 13 2 0 -2 13 13 14 1 1 2 13 13 15 0
03-22-20 2 11 10 12 2 2 2 -2 11 14 15 2 2 -2 13 13 13 2 -1 -2 12 13 14 1
03-21-20 3 11 2 10 2 10 2 11 3 12 2 12 2 -2 2 13 15 13 1 -2 3 12 13 12
03-20-20 4 3 3 10 10 10 3 11 2 9 2 10 2 11 2 11 2 11 1 -2 2 12 15 13
03-19-20 5 6 5 9 11 10 4 3 3 10 10 11 4 11 2 8 2 10 1 11 3 10 2 11
03-18-20 7 6 7 9 9 9 5 6 4 9 11 11 5 3 3 10 10 10 4 11 3 9 2 10
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 8 10 11 8 7 10 8 7 6 9 7 6 4 7 6
% Succ 69.2   61.5 76.9   84.6 66.7   58.3 83.3   66.7 63.6   54.5 81.8   63.6 60.0   40.0 70.0   60.0
Ave Error 2.7   3.1 2.2   2.3 2.7   4.8 2.2   4.3 3.0   5.2 2.0   4.5 2.7   5.4 2.6   5.3
Net Error -0.7   0.5 1.2   -0.5 -0.8   0.8 1.2   -0.5 -0.6   1.0 1.1   -0.5 -1.1   1.4 0.6   -1.3
Std Dev 2.7   4.0 3.0   3.7 2.9   5.3 3.0   4.6 2.2   5.8 1.5   4.6 2.4   5.5 2.1   5.8