Weather Outlook

30-Day Weather Outlook for November 13, 2017, to December 13, 2017

  • Nov 14, 2017

Summary- The MJO Cycle is beginning the transition from a dry (inactive) phase to favor more active troughing into California and the far west US. The transition should be completed between Nov 17-18th. Support exists in the sea surface temperature anomaly (SSTA) field for a long wave trough in the central N Pacific around 150W, and a second trough near 125-130W.

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30-Day Weather Outlook for November 6, 2017, to December 6, 2017

  • Nov 07, 2017

Summary- The MJO Cycle is transitioning from a troughing (wet) phase to a dry one. The transition should be completed between November 14th and 17th. Support exists in the sea surface temperature anomaly (SSTA) field for a long wave trough in the central N Pacific around 160-170W, and second trough near 130W.

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30-Day Weather Outlook for October 30, 2017, to November 30, 2017

  • Oct 31, 2017

Summary- The wet (troughing) part of the MJO Cycle will dominate during Nov 3-12. Rains occur in N, central and S California during this period, and some locally heavy rains are possible. Support exists in the sea surface temperature anomaly (SSTA) field for a long wave trough in the east-central North Pacific 140-145W, and a trough around 120-105W (central and S California E through the southern...

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30-Day Weather Outlook for October 22, 2017, to November 22, 2017

  • Oct 25, 2017

Summary- Fronts will approach Washington-Oregon, but minimal rain for N, and central California. Rain is unlikely through Oct 31 for S California. There is support for troughing into SOCAL with development of cutoff upper lows. The first low appears to develop around Nov 2-3, then produces a chance for showers in the S SierraNV, and in S California around Nov 3-4. Another system, possibly with a...

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30-Day Weather Outlook for October 10, 2017, to November 10, 2017

  • Oct 10, 2017

Summary- Troughing will continue in the central Pacific with fronts approaching Washington-Oregon, with rain. There is increasing support for troughing in the southern Plateau area east of Southern California. This should begin to increase the support for dry winds and frosts into S California valleys later in Oct and into November.

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30-Day Weather Outlook for October 2, 2017, to November 2, 2017

  • Oct 03, 2017

Summary- Troughing will continue in the central Pacific with fronts approaching Washington-Oregon, with rain. For California, including the north, continued drier than normal overall with recurrent dry windy events, interrupted by windy cold fronts with scant or small precipitation through October 19th.

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