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
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