<Back to Archives>

<Back to Main Menu>

JUNE 2000 WEATHER REVIEW

June 14th. 0545hrs. Already, it is a record 81F outside after a low of 52F at 2100 during the previous night (or, an astounding 30F rise in temp overnight). By 0900, temp is now 91F, on the way to a new alltime record high of 95.8F. Throughout the Bay Area, and Central California, this day would be remembered as the hottest overall in recorded history. Most places on the Peninsula recorded readings well over 110F, with an unofficial 117F in Foster City.  Official all-time record readings were recorded in San Jose and downtown San Francisco and over 20 other locations. The pattern responsible was a continuation of one that has been noted in my postings all Winter long: i.e. a major low/trough digging N/S down off the coast then inland instead of a more typical NW-SE or W-E track. The leading edge of the trough brought our entire monthly rain of 0.33" to Pacifica on the 7th and 8th as it passed by then stalled off the South Cent coast before finally swinging inland on the 11th. The heat spell was well forecasted as the strength of the building high was readily apparent and the pattern quite familiar. News reports said 21 people died, mostly from heat related problems...11 of them in San Mateo County alone. Usually by this time, Winter patterns are over and our typical summer fog in the morning is well entrenched.....but not in this La Nina fueled season. A very curious paradox is that despite the heat, Sea Surface Temps were slightly below normal. And in light of a pronounced below normal onshore wind pattern for most of the month, which fosters upwelling and SST cooling, the lower SST's are obvious signs of the continuation of the La Nina that has dominated our weather for the last two years. For the just ended climatological year (July-June), our total rain amounted to 34.34". It was a record 6th consecutive year of above normal rainfal and 8 out of the last 9 years.

By month's end, fog and low clouds had finally returned, and drizzle had actually started to fall along the coast..much more typical for this time of year.  Lower pressure and troughiness developed over the coast and the NW, and below normal temps into early July at least are now being anticipated...a pronounced shift from the heat of earlier in the month. Historically, La Nina patterns are punctuated by extremes in both temp and precipitation, and certainly this two year La Nina event is no exception. From the near record cold of December 1998 to the all time record high of June 2000, this La Nina is indeed fitting the classic pattern. As for flora and fauna, due to the late Spring rains and absence of a significant Winter freeze, wildflowers and most other flora are in great abundance, and many wildflowers remained much later into Spring, especially on north facing hills. Fishing in the ocean has been on/off, as good schools of both Stripers and Salmon were found near the coast until mid month, then moved out and south. Baitfish in particular have been curiously absent with only minor schools noted, however the size of the bait, especially Anchovy, is exceptionally large (what bait there is). Also, in seeming response to now 6 straight years of above normal rain for California (and 8 out of 9), Striper numbers are way up compared to the last 20 years or so, and fishing in the Bay has been especially outstanding. Surf fishing also has been excellent on occasion with many more big fish noted despite no real runs to speak of (mostly due to a late exodus from the Bay and lack of nearby bait). On a sadder note, all along the California Coast unusually large numbers of whales continue to be washed up dead along beaches and in the Bay, and many seals are reported dead/dying along the SoCent coastal areas. Many animals appear malnourished, but experts believe that lack of available food (as might be caused by population increases) may not be the real culprit, but water born toxins, such as plankton or bacteria...as other non-mammalian animal life does not appear seriously affected at this time.

                   MONTHLY CLIMATOLOGICAL SUMMARY for JUN. 2000


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  58.0  70.9   2:15p  46.5   5:45a   6.3   0.0  0.00   2.0   9.0  11:45a   NNE
 2  56.0  63.1   1:45p  52.0   7:00a   7.5   0.0  0.00   3.2  16.0   4:00p   SSW
 3  55.3  61.0   2:00p  51.6   6:15a   8.7   0.0  0.00   2.8  12.0   2:30a   SSW
 4  54.9  61.3   1:45p  50.8   6:00a   9.0   0.0  0.00   3.8  16.0   3:00p   SSW
 5  59.3  68.0   2:00p  54.2  12:15a   3.9   0.0  0.00   4.6  21.0   3:45p     S
 6  58.6  64.8   3:15p  54.1   6:00a   5.5   0.0  0.00   3.9  15.0   4:15p     S
 7  60.3  68.1   3:00p  54.8  12:00m   3.6   0.0  0.14   5.6  19.0   7:30p     S
 8  54.0  55.4   3:30p  52.8   2:30a  10.9   0.0  0.19   4.2  19.0   8:15p   SSW
 9  57.6  64.0   2:45p  52.2   6:15a   6.9   0.0  0.00   4.7  21.0   4:45p   SSW
10  55.9  62.0  12:00p  51.4   4:00a   8.3   0.0  0.00   4.3  20.0   3:45p   SSW
11  56.7  63.7   2:15p  49.8   4:30a   8.3   0.0  0.00   4.0  19.0   5:15p   SSW
12  60.0  68.0  12:30p  54.2   5:00a   3.9   0.0  0.00   4.5  21.0   7:15p   SSW
13  64.5  75.8   2:15p  52.7   6:15a   0.8   0.0  0.00   1.8   9.0  11:30a     S
14  82.5  95.8   1:15p  66.5  12:15a   0.0  16.2  0.00   2.8  18.0  11:30a   SSW
15  72.0  84.7  11:30a  58.5  12:00m   0.0   6.6  0.00   2.5  18.0   1:45p   SSW
16  64.9  78.3   2:15p  54.6   5:00a   0.0   1.4  0.00   2.5  18.0   3:00p   SSW
17  63.6  70.5   3:15p  56.4   1:30a   1.5   0.0  0.00   4.4  23.0   3:45p     S
18  61.8  67.4   3:15p  56.8  12:00m   2.9   0.0  0.00   3.7  20.0   8:30a     W
19  62.3  70.8  12:00p  53.8   7:00a   2.7   0.0  0.00   2.4  15.0  11:00a     N
20  63.1  75.0   2:45p  52.9   6:15a   1.0   0.0  0.00   1.8   9.0  11:30a     N
21  63.4  76.2   1:15p  52.6   6:30a   0.6   0.0  0.00   2.1  10.0   2:30p   SSW
22  58.2  66.2  11:00a  53.7  12:00m   5.1   0.0  0.00   3.6  18.0   1:45p     N
23  57.7  64.7   1:30p  52.7   2:45a   6.3   0.0  0.00   5.0  25.0  11:15a     S
24  60.7  70.3   2:30p  53.5   6:00a   3.1   0.0  0.00   4.2  20.0   1:15p     S
25  60.3  67.0   2:15p  56.3   6:30a   3.3   0.0  0.00   2.1  10.0   1:45p     W
26  60.7  69.6   1:45p  54.5   7:00a   3.0   0.0  0.00   2.0  10.0   2:45p   NNW
27  60.0  69.3   1:45p  52.6   5:45a   4.0   0.0  0.00   2.1   9.0   1:30p   ESE
28  61.0  70.7  11:45a  54.9   7:00a   2.2   0.0  0.00   2.1  10.0  12:30p   NNW
29  60.0  68.5  12:00p  55.5  11:45p   3.0   0.0  0.00   3.0  16.0   6:00p     N
30  56.3  59.9   4:00p  53.5   7:15a   8.3   0.0  0.00   5.4  18.0   3:00p     S
-------------------------------------------------------------------------------------
    60.7  95.8    14    46.5     1   130.5  24.2  0.33   3.4  25.0    23     SSW


Max >= 90.0:  1
Max <= 32.0:  0
Min <= 32.0:  0
Min <=  0.0:  0
Max Rain: 0.19 ON  6/08/00
Days of Rain: 2 (>.01 in) 2 (>.1 in) 0 (>1 in)
Heat Base:  65.0  Cool Base:  65.0  Method: (High + Low) / 2