MIRAMAR NAS   (NKX)
LAT 32 52N
LONG 117 09W 
ELEV 00476(ft) 00145(m)
TYPE NAVY SMOS V3 16031995
PERIOD OF RECORD 1947-1993


GENERAL SUMMARY:

               Naval   Air  Station  Miramar,  California   is    
          located  12  miles north of downtown San  Diego  and    
          about  7  1/2 miles inland from the  Pacific  Coast.    
          The  station  is  situated on a mesa  which  has  an    
          average  elevation  of about 450 feet. East  of  the    
          mesa the Laguna Mountain range dominates, with peaks    
          rising  to 6500 feet.  East of the Laguna  Mountains    
          lies the Imperial Valley and the Salton Sea.   
		           
               Miramar's  climate  is  a  subtropical   Steppe    
          climate characterized by warm dry summers,  moderate    
          winters  and frequent fog.  The  principal  climatic    
          controls  are the semi-permanent  subtropical  ridge    
          with  its  shallow, fog-producing marine  layer  and    
          pronounced,  smoke-trapping low-level inversion  and    
          the cool California current which restricts the mean    
          temperatures to a 15 degree range.  The main special    
          phenomena  is the Santa Ana condition  which  occurs    
          chiefly  in  the  summer  and  early  fall.   It  is    
          characterized  by  hot, dry,  east  winds.  Although    
          Miramar   rarely   experiences  the   strong   winds    
          associated  with the Santa Ana, it is  subjected  to    
          temperatures in the mid 90's to low 100's during the    
          cycle.  Humidities at those times are extremely  low    
          and fire conditions are greatly increased.  
		              
               Flying  weather  is  generally  good.  Fog  and    
          coastal low cloudiness are the major weather hazards    
          to flying safety.  On a seasonal basis, fog and  low    
          clouds  are  nearly  twice as  prevalent  from  June    
          through  November  with the worst month  being  July    
          during  which some 15 days have fog and low  clouds.    
          On  a  diurnal  basis  this  fog/low  cloudiness  is    
          confined  almost  exclusively to the  hours  between    
          midnight and 0900 local time.    
		                         
               Few  fronts  pass through  Miramar,  especially    
          during  the  spring and summer months.  Very  often,    
          even during the winter months, frontal passages  are    
          hailed only by extensive middle cloudiness.             
               Precipitation  consists almost  exclusively  of    
          rain   or  rain  showers  associated  with   frontal    
          passages from November through March.  More than 75%   
          of  the  11 inches of  annual  precipitation  falls    
          during these months.        
		                           
               Temperatures  are  mild  as  befits  a   locale    
          dominated  by a marine layer which overlies  a  cold    
          current.   The  extreme minimum  temperature  is  28    
          degrees F.  The absolute maximum temperature was 111    
          degrees F, and occurred as might be expected  during    
          the Santa Ana condition in September.  
		                   
               Surface winds undergo both seasonal and diurnal    
          variations.   During  the  winter  and  spring   the    
          northwest  sea breeze commences about 1100  LST  and    
          lasts  until about 1600 LST.  East winds prevail  at    
          other hours.  During the summer and fall months, the    
          sea  breeze  commences about 0900  LST  and  endures    
          until 1700 LST.  At night the winds become  easterly    
          again, or calm.  Thus, due to the diurnal  variation    
          of  the sea-land breeze, the prevailing winds  shift    
          from  easterly in the winter and spring to  westerly    
          during the summer and fall.     
		                          
               Destructive  storms, high winds,  thunderstorms    
          and snow are extremely rare at Miramar; however, the    
          Laguna  Mountains  harbor strong  Santa  Ana  winds,    
          clear  air  turbulence  and  occasional   summertime    
          thunderstorms.                                          

--------------------------------------------------------------

    Percent Frequency Daily PRECIPITATION AMOUNTS
                                                                                               PERCENT  TOTAL         TOTAL                                                                                               OF DAYS   NO.          PRECIP
                                                                                                WITH     OF          (INCHES)
                                              INCHES                                           AMOUNTS   OBS   MEAN    HI     LOW  
      NONE  TRACE    .01  <=.05  <=.10  <=.25  <=.50  <=1.0  <=2.5  <=5.0 <=10.0 <=20.0  >20.0  >=.01  

JAN   70.7    7.4    1.8    4.3    3.2    3.9    4.1    2.9    1.8     .1      0      0      0  21.9    1426   2.25   8.87      T
FEB   70.8    8.8    2.2    3.3    3.4    3.7    3.4    3.3    1.1      0      0      0      0  20.4    1287   1.69   7.15      T
MAR   67.3   10.2    2.2    4.4    2.9    5.1    3.2    3.5    1.1      0      0      0      0  22.4    1426   1.98   7.70      T
APR   72.4   12.4    1.7    4.4    1.9    3.5    2.2    1.0     .5      0      0      0      0  15.3    1350    .92   3.84      T
MAY   76.3   15.6    1.9    2.9    1.1    1.1     .6     .2     .1      0      0      0      0   8.0    1394    .29   2.60      0
JUN   81.5   14.1    1.3    1.7     .7     .5     .1     .1      0      0      0      0      0   4.4    1350    .08    .76      0
JUL   91.6    6.1     .6    1.0     .6     .1     .1      0      0      0      0      0      0   2.3    1451    .04    .47      0
AUG   92.1    6.3     .5     .6     .3     .1      0     .2      0      0      0      0      0   1.6    1452    .06   1.42      0
SEP   86.3    8.8    1.1    1.4     .6     .8     .6     .2     .1      0      0      0      0   4.8    1405    .22   2.10      0
OCT   81.4   11.3    1.1    1.9    1.5    1.3     .8     .6     .1      0      0      0      0   7.3    1453    .40   2.63      0
NOV   78.7    5.6    1.4    3.3    2.3    3.5    2.6    1.7     .8      0      0      0      0  15.7    1408   1.20   5.66      0
DEC   75.9    6.3    1.4    3.7    3.0    3.9    2.9    2.1    1.0      0      0      0      0  17.9    1454   1.52   4.95    .04
ANN   78.9    9.4    1.4    2.7    1.8    2.3    1.7    1.3     .6      *      0      0      0  11.8   16856  10.65  28.10   2.45


* = PERCENT < .05  
T = ZERO PRECIP, SNOWFALL OR SNOW DEPTH MEASURED BUT A TRACE WAS NOTED
+ = ANNUAL HI AND LOW VALUES ARE DERIVED FROM ANNUAL TOTALS
# = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED


    Cumulative Percent Frequency Daily MINIMUM TEMPERATURES


Temp(F)  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  ANN

   >=80    0    0    0    0    0    0    0   .1    0    0    0    0    *
   >=75    0    0    0    0    0    0   .1   .1   .4   .1    0    0   .1
   >=70    0    0    0    0    0   .1  1.2  2.9  2.9   .5    0    0   .6
   >=65    0    0    0   .1   .1  1.6 19.7 34.4 17.8  3.6   .5    0  6.6
   >=60   .1   .1   .1  1.4  7.2 31.6 75.3 85.7 68.0 27.0  2.8   .4 25.4
   >=55  3.4  4.6  5.5 19.0 50.1 84.5 98.5 99.1 93.9 66.5 19.1  4.7 46.1
   >=50 20.4 26.0 35.5 63.0 90.2 98.7  100  100 99.8 93.4 54.5 21.9 67.2
   >=45 53.9 62.8 79.0 92.0 99.4  100  100  100  100 99.2 86.3 58.4 86.0
   >=40 86.0 92.8 97.6 99.8  100  100  100  100  100 99.9 98.7 89.4 97.0
   >=35 97.7 99.4 99.9 99.9  100  100  100  100  100 99.9 99.9 97.9 99.5
   >=30 99.9  100  100  100  100  100  100  100  100  100  100 99.8  100
   >=25  100  100  100  100  100  100  100  100  100  100  100  100  100
   MEAN 45.0 46.3 47.8 50.8 54.4 57.7 61.7 63.1 61.2 56.4 50.1 45.6 53.4
   STDV  5.2  4.8  4.2  4.3  3.6  3.3  3.3  3.4  4.1  4.7  5.0  5.1  7.7
   #OBS 1426 1285 1426 1349 1394 1350 1450 1451 1404 1453 1408 145516851


* = PERCENT < .05  
# = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED


    Cumulative Percent Frequency Daily MAXIMUM TEMPERATURES 



Temp(F)  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  ANN

  >=110    0    0    0    0    0    0    0    0   .1    0    0    0    *
  >=105    0    0    0    0   .1   .1   .1    0   .8   .2    0    0   .1
  >=100    0    0   .1   .1   .2  1.0   .3   .3  2.0   .9   .1    0   .4
   >=95    0    0   .1   .5   .4  1.5  1.3  1.7  5.1  3.1   .4    0  1.2
   >=90    0   .2   .4  1.0  1.1  3.9  5.3  7.2 13.2  8.1  1.8    0  3.6
   >=85  1.5  2.0  1.4  4.5  3.6  8.6 18.6 23.0 25.4 16.7  7.1  1.0  9.6
   >=80  6.7  7.3  4.9 10.3  8.9 18.9 48.1 56.2 47.2 29.1 18.2  7.8 22.2
   >=75 15.6 15.9 12.8 20.4 23.5 43.7 84.5 88.8 75.6 53.7 34.3 18.7 41.0
   >=70 29.6 29.5 25.3 39.2 52.6 77.8 99.2 99.7 96.2 84.4 54.6 35.2 60.6
   >=65 49.7 52.8 51.1 69.7 87.0 95.4  100  100 99.9 97.6 81.6 59.5 78.9
   >=60 76.9 81.6 84.2 93.1 98.4 99.9  100  100  100 99.4 95.9 84.6 92.9
   >=55 94.5 97.7 98.2 99.6  100  100  100  100  100  100 99.8 96.9 98.9
   >=50 99.4 99.8 99.9  100  100  100  100  100  100  100  100  100 99.9
   >=45 99.9  100 99.9  100  100  100  100  100  100  100  100  100  100
   >=40  100  100 99.9  100  100  100  100  100  100  100  100  100  100
   >=35  100  100  100  100  100  100  100  100  100  100  100  100  100
   MEAN 65.7 66.3 65.9 68.9 70.8 74.5 79.9 80.9 80.3 76.6 71.7 67.0 72.4
   STDV  8.0  7.7  7.0  7.5  6.4  7.0  5.5  5.4  7.7  8.0  7.9  7.6  9.1
   #OBS 1426 1286 1426 1350 1394 1350 1450 1449 1404 1452 1409 145516851


* = PERCENT < .05  
# = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED

--------------------------------------------------------------------------------
------------------INTERNATIONAL STATION METEOROLOGICAL CLIMATE SUMMARY-------------------

 :STA 722908 | KNKX | MIRAMAR NAS ,CA,US
:LAT 32 52N :LONG 117 09W :ELEV 00476(ft) 00145(m) :TYPE NAVY SMOS V3 16031995
37 - STATION CLIMATIC SUMMARY 


POR: (HOURLY): 1947-1993 

    TEMPERATURE (DEG F)|    PRECIPITATION (INCHES) (^)  |REL HUM|VAP|DEW| PR |WIND (KTS) |   |      MEAN NO. OF DAYS WITH (&)
       MEANS   |EXTREME|       PRECIP.     |SNOWFALL (@)|PERCENT|PR |PT.| ALT|           |SKY|PRECIP.|SNOW-  |   |   |  TEMP (DEG F)
       |   |   |   |   |     |    |    |24H|    |   |24H| (LST) |IN.|(F)| FT.|PREVAIL|MAX|CVR|INCHES |FALL(")|TH |FOG|MAX|MAX|MIN|MIN
    MAX|MIN|AVG|MAX|MIN| MEAN| MAX| MIN|MAX|MEAN|MAX|MAX| AM| PM|HG.|   |  $ |DIR|SPD|GST| + | >=| >=| >=| >=|STM| * | >=| >=| <=| <=
                                                        | 07| 16|                            |.01|.50|.10|1.5|       | 90| 70| 32| 10

JAN  66  45  56  88  28   2.3  8.9    T 2.7    T   T   T  69  56 .25  40   65   E   4  44 CLR   7   1   0   0   #  10   0   9   #   0
FEB  66  46  57  93  32   1.7  7.1    T 1.7    0   0   0  72  57 .27  42   65   E   4  48 CLR   6   1   0   0   1  10   #   8   #   0
MAR  66  48  57 102  31   2.0  7.7    T 2.4    0   0   0  77  59 .30  45   70 WNW   7  48 BRK   7   1   0   0   1  10   #   8   #   0
APR  69  51  60 102  33    .9  3.8    T 2.1    0   0   0  75  58 .33  48   65 WNW   7  48 OVR   5   #   0   0   #  10   #  12   0   0
MAY  71  54  63 109  42    .3  2.6    0 1.5    0   0   0  76  60 .38  51   65 WNW   6  44 OVR   2   #   0   0   #  11   #  16   0   0
JUN  74  58  66 105  46    .1   .8    0  .6    0   0   0  78  60 .43  55   65 WNW   5  32 OVR   1   #   0   0   #  15   1  23   0   0
JUL  80  62  71 106  50     T   .5    0  .5    0   0   0  80  57 .50  59   65 WNW   5  33 SCT   1   0   0   0   #  17   2  31   0   0
AUG  81  63  72 102  50    .1  1.4    0  .8    0   0   0  81  58 .52  60   65 WNW   5  28 SCT   #   #   0   0   #  16   2  31   0   0
SEP  80  61  71 111  49    .2  2.1    0 1.1    0   0   0  78  58 .48  58   70  NW   6  41 CLR   1   #   0   0   #  15   4  29   0   0
OCT  77  56  67 108  33    .4  2.6    0 1.3    0   0   0  74  59 .39  52   65  NW   6  33 CLR   2   #   0   0   #  14   2  26   0   0
NOV  72  50  61 100  34   1.2  5.7    0 2.0    0   0   0  67  56 .29  44   65   E   4  50 CLR   5   1   0   0   #  11   1  16   0   0
DEC  67  46  57  89  28   1.5  4.9    T 2.3    T   T   T  67  55 .24  40   65   E   4  41 CLR   6   1   #   0   #  10   0  11   #   0
ANN  72  53  63 111  28  10.6 28.1  2.4 2.7    T   T   T  74  58 .35  49   70 WNW   5  50 OVR  43   5   #   0   2 149  13 221   1   0
POR  46  46  46  46  46    46   46   46  46   46  46  46  46  46  46  46   44  46  46  45  44  46  46  46  46  37  37  46  46  46  46


T = TRACE AMOUNTS ( < .05  < .5 INCHES  
# = MEAN NO. DAYS < .5 DAYS 
$ = PRESSURE ALTITUDE IN TENS OF FEET (I.E.  50 = 500 FEET) 
@ = NAVY STATIONS REPORT HAIL AS SNOWFALL; ALSO NWS FROM JULY,1948 - DEC.,1955
+ = THE PREDOMINANT SKY CONDITION
* = VISIBILITY IS NOT CONSIDERED
& = ANN TOTALS MAY NOT EQUAL SUM OF MONTHLY VALUES DUE TO ROUNDING 
^ = 24 HR MAX PRECIP AND SNOWFALL ARE DAILY TOTALS (MID-NIGHT TO MID-NIGHT)  
I = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED
" = INCHES

             MEAN NO. OF DAYS WITH (&)          |   
          PRECIPITATION     |  OBSTR TO VISION  |   
        |FRZ |    |HAIL|    |SMOK|BLOW|DUST| OBS|   
    R/DZ|R/DZ|SNOW|/SLT|PRCP|HAZE|SNOW|SAND| VIS|   

JAN   10    0    #    #   10    9    0    0   13
FEB    8    0    0    #    8    9    0    #   13
MAR   10    0    0    #   10   11    0    #   14
APR    9    0    0    #    9   11    0    0   13
MAY    8    0    0    0    8   13    0    1   16
JUN    6    0    0    0    6   19    0    0   21
JUL    2    0    0    0    2   23    0    1   26
AUG    2    0    0    0    2   22    0    1   24
SEP    4    0    0    0    4   19    0    0   22
OCT    6    0    0    #    6   17    0    1   20
NOV    7    0    0    #    7   12    0    #   15
DEC    8    0    #    #    8   10    0    #   13
ANN   80    0    #    #   80  175    0    4  210
POR   37   37   37   37   37   37   37   37   37


& = ANN TOTALS MAY NOT EQUAL SUM OF MONTHLY VALUES DUE TO ROUNDING 
I = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED
# = MEAN NO. DAYS < .5 DAYS