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JSC Weather Monthly Summary


JSC Building 30 Weather         Month:  Dec          Year:       2008

        Temperature in F                        Precipitation (inches)              Peak Wind (mph)             Altimeter
     Day  Max    Min   Average   HDD     CDD    Water   Snow  Snow Depth   Weather Direction Speed  Time [CST]  Min    Max    Remarks         Cocorahs
       1   51     47     49.0   16.0            0.37                                   W       31   1934        29.51  30.02                  0.05
       2   51     45     48.0   17.0            0.02                                   N       36   1734#       29.59  30.01                  1.19
       3   54     42     48.0   17.5            0.00                             1     N       20   2044#       30.00  30.20                  0.00
       4   47     32     39.5   25.5            0.18    0.00                           N       26   1216        30.03  30.11  Snow/Rain mix   0.22                  
       5   46     29     37.5   27.5            0.00                                   SE      14   1636        30.06  30.30                  
       6   60     46     53.0   12.0            0.27                             1     E       20   1848#       29.92  30.07   
       7   60     55     57.5    7.5            0.38                             1     NE      17   1222        29.89  30.03                  1.18@                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
       8   75     55     65.0    0.0            0.02                             1     SW      29   1756        M      M      no pressure     Trace    
       9   66     41     53.5   11.5            0.00                                   NE      28   0928        29.71  30.05                  0.00
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Sum                            449.0     4.0     1.24   0.00                      

Average 57.2    44.1      50.6                    
Maximum   75      65                                                                            51                     30.48
Minimum   46      29                                                                                            29.45

Temperature Data         Precipitation Data              Weather Symbols:
Average Monthly:      51 Total for month:             1.24      1 Fog
JSC avg-EFD Climo   -4.4 JSC - EFD Climo:            -2.36      2 Fog, VSBY <= 1/4 SM
Highest:      75 on  8th Greatest daily total:        0.38      3 Thunder
Lowest:       29 on  5th Days with 0.01" or more:        6      4 Ice Pellets
                         Days with 0.10" or more:        4      5 Hail
                         Days with 0.50" or more:        0      6 Glaze or rime
                         Days with 1.00" or more:        0      7 Blowing Dust or Sand, VSB <= 1/2 SM
                         Year-to-date rainfall:      38.27      8 Smoke or Haze
                         Days with thunder:              0      9 Blowing Snow
                         Lightning flashes within      TBD      X Tornado, waterspout, funnel cloud
                         Days with dense fog:            3      # Last of more than one occurrence
JSC - EFD climate year to end of month: -9.13*

Remarks: 
New Period of Record for Ellington Field climatology for comparison.  POR 07/1941 - 08/2007 
*Rainfall is underestimated due to equipment probems from July through December.


JSC weather observations are considered experimental and unofficial. Quality control procedures of the data appearing
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