weather station number     , observations since March 31, 2007
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Date / Local time
T
Po
P
Pa
U
DD
Ff
ff10
ff3
N
WW
W1
W2
Tn
Tx
Cl
Nh
H
Cm
Ch
VV
Td
RRR
tR
E
Tg
E'
sss
2025
April 18,
Friday
15
23.8
751.7
762.6
 
36
Wind blowing from the west-northwestLight air
(1 m/s)
  
90 or more, but not 100%
     Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus, all having their bases at the same level.
7080%.
1000-1500
No Altocumulus, Altostratus or Nimbostratus.Cirrus uncinus or fibratus, or both, progressively invading the sky; they generally thicken as a whole.
10.0
7.6
      
12
23.0
752.5
763.4
 
33
Wind blowing from the westLight air
(1 m/s)
  
90 or more, but not 100%
     No Stratocumulus, Stratus, Cumulus or Cumulonimbus.
no clouds
2500 or more, or no clouds.
No Altocumulus, Altostratus or Nimbostratus.Cirrus uncinus or fibratus, or both, progressively invading the sky; they generally thicken as a whole.
10.0
6.0
      
09
17.5
753.2
764.3
 
51
Wind blowing from the west-southwestLight air
(1 m/s)
  
90 or more, but not 100%
   
14.1
 No Stratocumulus, Stratus, Cumulus or Cumulonimbus.
40%.
2500 or more, or no clouds.
Altocumulus translucidus at a single level.Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon.
10.0
7.2
No precipitation
12
Surface of ground moist.
9.0
  
06
14.1
753.5
764.7
 
63
Calm, no windCalm  
2030%.
   
14.1
 Stratocumulus other than Stratocumulus cumulogenitus.
2030%.
600-1000
No Altocumulus, Altostratus or Nimbostratus.No Cirrus, Cirrocumulus or Cirrostratus.
10.0
7.1
No precipitation
12
    
03
14.6
754.0
765.2
 
68
Wind blowing from the westLight air
(1 m/s)
  
100%.
     Stratocumulus other than Stratocumulus cumulogenitus.
100%.
300-600
  
10.0
8.8
      
00
16.4
754.4
765.6
 
51
Wind blowing from the westLight air
(1 m/s)
  
90 or more, but not 100%
     No Stratocumulus, Stratus, Cumulus or Cumulonimbus.
90 or more, but not 100%
2500 or more, or no clouds.
Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels.No Cirrus, Cirrocumulus or Cirrostratus.
10.0
6.3
      
April 17,
Thursday
21
17.2
754.7
765.8
 
47
Wind blowing from the westLight air
(1 m/s)
  
90 or more, but not 100%
    
18.6
No Stratocumulus, Stratus, Cumulus or Cumulonimbus.
90 or more, but not 100%
2500 or more, or no clouds.
Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.No Cirrus, Cirrocumulus or Cirrostratus.
10.0
5.8
No precipitation
12
    
18
18.4
755.1
766.2
 
47
Wind blowing from the westLight air
(1 m/s)
  
100%.
     No Stratocumulus, Stratus, Cumulus or Cumulonimbus.
100%.
2500 or more, or no clouds.
Altocumulus translucidus in bands, or one or more layers of Altocumulus translucidus or opacus, progressively invading the sky; these Altocumulus clouds generally thicken as a whole. 
10.0
6.9
Trace of precipitation
12
    
15
17.9
756.7
767.8
 
47
Wind blowing from the westLight air
(1 m/s)
  
90 or more, but not 100%
State of sky on the whole unchanged.Rain.Cloud covering more than 1/2 of the sky throughout the appropriate period.  Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels.
40%.
1000-1500
Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus.Cirrocumulus alone, or Cirrocumulus accompanied by Cirrus or Cirrostratus or both, but Cirrocumulus is predominant.
10.0
6.4
      
0