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MONSOON SURGE INDEX


Today's surface pressure at Mazatlan and Yuma, their difference, and other Yuma surface observations. [ARCHIVE]
                                                 | ---  other Yuma surface fields --- |
  date    hr(UTC)  pres_Maza  pres_Yuma  delta_p   T(F)     Td(F)   wpsd(knots)    dir
04/10/01     0     1007.0     1005.8       1.2      88.0      50.0       8.1       200.
04/10/01     1     1008.2     1005.9       2.3      88.0      50.0       5.9       189.
04/10/01     2     1008.5     1006.3       2.2      87.1      51.1       4.9       189.
04/10/01     3     1008.8     1006.9       1.9      82.9      53.1       8.1       160.
04/10/01     4     1009.9     1007.6       2.3      80.1      66.0      13.0       150.
04/10/01     5     1009.9     1008.3       1.6      78.1      66.0      12.0       160.
04/10/01     6     1008.6     1008.8      -0.2      75.9      64.0       8.1       170.
04/10/01     7     1009.9     1009.1       0.8      73.9      62.1       8.1       160.
04/10/01     8     1009.2     1009.3      -0.1      73.9      61.0       5.1       130.
04/10/01     9     1009.0     1009.4      -0.4      73.0      60.1       6.1       130.
04/10/01    10     1009.2     1009.4      -0.2      73.9      60.1       6.1       130.
04/10/01    11     1009.5     1009.6      -0.1      72.0      60.1       6.1       140.
04/10/01    12     1008.2     1010.2      -2.0      72.0      59.0       6.1       130.
04/10/01    13     1010.5     1010.7      -0.2      71.1      59.0       6.0        90.
04/10/01    14     1010.9     1011.3      -0.4      72.0      59.0       6.0        90.
04/10/01    15     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    16     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    17     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    18     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    19     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    20     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    21     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    22     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.
04/10/01    23     -999.0     -999.0    -999.0    -999.0    -999.0    -999.0      -999.


Top 2 panels: Time series plot of surface pressures and differences at Mazatlan and Yuma.
Bottom 3 panels: Time series plot of u and v components of surface wind averaged over northern GoC, central GoC, and southern GoC. [ARCHIVE]



Time series plot of surface dewpoints at Yuma, Tucson, and Phoenix. Strong surges at Yuma are typically associated with dewpoints near 70°F. One measure of the monsoon onset is 3 consecutive days of daily average dewpoint > 54°F at Tucson, and dewpoint > 55°F at Phoenix. [ARCHIVE]