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WEATHER SUMMARY FOR MAY 1999

In marked contrast to the wild El Nino May of 1998, May of 1999 was much calmer rain-wise. However, after a relatively mild April and it's two spells of mid-70's temps, May showed a return to much below temps. Early in the month, Sea Surface Temps were reported as low as  46F off the Marin Coast (about 6-8F lower on average most everywhere), and SST off Pacifica was hard pressed to break 50F. Hence, mean air temps for the month were the coldest in decades at 53.3 F,  or -4.2 degrees departure from normal.  SST's by month's end had crept back to slightly above 50F, mostly as a result of prolonged south winds along the coast during the third and fourth weeks of the month .The south winds, blowing warmer water northward, broke 30mph on the 22nd and 23rd. Winds significantly higher than normal occurred most of the month, with the dominant direction being SSW at my house. Frequent troughs and upper lows are still influencing our pattern, but the cool waters have provided little moisture to work with and no decent rain has fallen after the 3rd. Total rain for the month was 0.32", about 50% of normal, a marked decline after last year when  3.58" fell. It now appears highly unlikely that any more significant rain will fall until next season. Since April 12, we have had only one rain event, which occurred during the first three days of May. As long as SST's remain as they are, a cold, foggy and blustery summer seems at hand for the coast. Another impact of the cold water has been the marginal Salmon season to date, as the water is so cold that fish are deep and farther off the coast seeking more favorable water despite abundances of bait closer to shore. Not only Salmon has been impacted, but Stripers, Halibut and other species are not showing in typical numbers for this time of year.  Coyotee, bear and mountain lion sightings and problems have all been reported within the last week.  A sick mountain lion was put down after it was tranquilized while wandering erratically in a parking lot near Livermore in the East Bay. A bear was removed from the Fort Ord area north of  Monterey, and returned to more familiar surroundings deep in the hills.  Coyotee(s) have been observed in my backyard three times this month alone.  Flora too continues to suffer, as fruit trees are just now in bloom, and the fruit growing season will be short again this year. Molds and fungus have invaded shrubs at my house, and other similar occurrences elsewhere  have been reported.

                   MONTHLY CLIMATOLOGICAL SUMMARY for MAY. 1999


NAME: HOME CITY: Pacifica  STATE: Ca  ELEV: 540'  LAT: 37.36'N  LONG: 122.27'W 


                   TEMPERATURE (°F), RAIN  (in), WIND SPEED (mph)


                                      HEAT  COOL        AVG
    MEAN                              DEG   DEG         WIND                 DOM
DAY TEMP  HIGH   TIME   LOW    TIME   DAYS  DAYS  RAIN  SPEED HIGH   TIME    DIR
------------------------------------------------------------------------------------
 1  50.7  53.1   3:30p  48.6  11:30p  14.2   0.0  0.01   5.6  24.0   2:30p   SSW
 2  50.7  56.2   2:00p  48.2   2:30a  12.8   0.0  0.08   6.0  24.0   6:30p   SSW
 3  51.3  55.0   2:00p  47.8  11:00p  13.6   0.0  0.19   5.8  19.0   2:30a   SSW
 4  51.6  58.7   1:00p  45.9  12:00m  12.7   0.0  0.00   3.8  19.0   3:00p     W
 5  55.2  67.8   9:00a  44.3   3:00a   8.9   0.0  0.00   2.4  11.0  11:00a     S
 6  52.9  59.7   3:00p  47.4   5:00a  11.4   0.0  0.00   4.3  20.0   4:00p     S
 7  51.6  60.6   9:30a  46.3   5:00a  11.6   0.0  0.00   4.9  28.0   6:30p     W
 8  50.8  62.2   9:00a  43.4   5:30a  12.2   0.0  0.00   4.0  25.0   2:30p     W
 9  50.3  61.1   9:00a  42.3   6:00a  13.3   0.0  0.00   3.8  22.0   4:30p   SSW
10  52.6  61.8   9:00a  43.8   5:00a  12.2   0.0  0.00   3.1  16.0   6:00p   SSW
11  54.3  62.5   3:00p  48.6   6:30a   9.5   0.0  0.01   3.4  16.0   6:00p   SSW
12  50.7  55.6   3:30p  46.8  12:00m  13.8   0.0  0.02   4.3  20.0   4:30p   SSW
13  50.9  60.4   9:30a  45.4   5:00a  12.1   0.0  0.00   5.4  25.0   2:30p     W
14  51.0  58.8   8:30a  45.4   5:30a  12.9   0.0  0.00   4.7  25.0  11:30a     W
15  51.6  59.5   9:00a  44.8   6:00a  12.8   0.0  0.00   4.0  19.0   5:00p     W
16  52.8  59.3   1:00p  47.8   5:30a  11.5   0.0  0.00   3.7  16.0   2:30p   SSW
17  55.1  65.3   9:00a  48.3  12:30a   8.2   0.0  0.00   3.8  16.0   6:30p     S
18  54.7  59.8   2:00p  50.8  12:00m   9.7   0.0  0.00   4.2  22.0   3:30p   SSW
19  51.8  57.0   1:30p  49.6  12:00m  11.7   0.0  0.00   6.8  24.0  10:00p   SSW
20  52.3  57.4   3:00p  49.0   5:00a  11.8   0.0  0.00   6.5  28.0   1:30a   SSW
21  56.3  67.5  11:00a  47.2   4:30a   7.7   0.0  0.00   2.0  10.0  11:30a     W
22  58.4  71.8  11:30a  49.7   2:00a   4.3   0.0  0.00   5.4  34.0   4:30p   ESE
23  57.4  63.9  11:30a  52.4   5:30a   6.8   0.0  0.00   7.7  30.0   1:30p     S
24  56.0  63.3   2:00p  51.6  12:00m   7.6   0.0  0.00   3.7  17.0  12:30a   SSW
25  55.5  66.3   1:00p  50.6   5:00a   6.5   0.0  0.01   2.8  12.0   2:00a   SSW
26  56.2  66.1   1:30p  49.8   4:00a   7.1   0.0  0.00   2.9  17.0  12:30p   NNW
27  51.5  54.5   3:00p  49.9   6:00a  12.8   0.0  0.00   5.0  16.0  11:30a   SSW
28  51.2  53.8   1:30p  49.0   6:00a  13.6   0.0  0.00   6.1  19.0  12:30p   SSW
29  51.3  54.6   4:30p  49.3   4:00a  13.1   0.0  0.00   5.8  28.0   3:30a     S
30  57.1  65.4   9:00a  49.0   2:00a   7.8   0.0  0.00   4.8  27.0  12:30p     S
31  57.4  65.7   9:00a  51.9   5:30a   6.2   0.0  0.00   5.3  22.0  11:30a     S
-------------------------------------------------------------------------------------
    53.3  71.8    22    42.3     9   330.2   0.0  0.32   4.6  34.0    22     SSW


Max >= 90.0:  0
Max <= 32.0:  0
Min <= 32.0:  0
Min <=  0.0:  0
Max Rain: 0.19 ON  5/03/99
Days of Rain: 3 (>.01 in) 1 (>.1 in) 0 (>1 in)
Heat Base:  65.0  Cool Base:  65.0  Method: (High + Low) / 2