Weather Outlook

30-Day Weather Outlook for August 14, 2017, to September 14, 2017

  • Aug 15, 2017

Summary- High pressure continues for S Oregon and N Calif west-southwestward. Because there is abundant moisture in this storm track, significant rains are possible in Washington State and British Columbia. Upper low pressure near S Calif and N Baja gives more support for rain and TSTMS in central Calif and the Sierra and SOCAL-Arizona. However the pattern evolves to a dry SW flow pattern into...

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30-Day Weather Outlook for August 7, 2017, to September 7, 2017

  • Aug 08, 2017

Summary- In the basic pattern high pressure continues for S Oregon and N Calif to Idaho. Because there is abundant moisture in this storm track, significant rains are possible in Washington State and SW British Columbia. Upper low pressure near S Calif and N Baja gives more support for rain and TSTMS in central Calif and the SierraNV, but produces drier SW flow (more stable airmass), which tends...

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30-Day Weather Outlook for July 31, 2017, to August 31, 2017

  • Aug 01, 2017

Summary- The basic pattern consists of high pressure continuing for the SW US and Great Basin/Rockies, with a tendency for troughing to the west of Oregon and NW Calif. Pacific into Oregon. High pressure will steer tropical cyclones NW or WNW past S Baja, and then turn westward towards Hawaii. Upper high pressure contributes hot weather for the near term (first week of Aug), followed by troughing...

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30-Day Weather Outlook for July 24, 2017, to August 24, 2017

  • Jul 26, 2017

Summary- The basic pattern consists of high pressure over the SW US and Great Basin/Rockies, with SW flow from the Pacific into Oregon. High pressure continues thru August 1 and possibly thru August 9 as tropical cyclones move NW off the Baja coast, then turn westward. Upper high pressure rebuilds July 28th with hot weather. Numerical guidance (GFS) tries to bring tropical moisture into...

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30-Day Weather Outlook for July 17, 2017, to August 17, 2017

  • Jul 18, 2017

Summary- The basic pattern consists of high pressure over the SW US and Great Basin/Rockies, with SW flow from the Pacific into Oregon. Troughing occurs most likely during July 19-20, and 24-26th. Upper high pressure rebuilds July 27-28 with S flow of moisture from Mexico into N Calif. Warm or hot S flow continuing July 28-31st and Aug 1. Moisture for TSTMS in the SierraNV continues limited but...

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30-Day Weather Outlook for July 3, 2017, to August 3, 2017

  • Jul 05, 2017

Summary- The basic pattern consists of high pressure over the southwestern US and Great Basin/Rockies, with SW flow to the west of Oregon. This upper high is helping tropical cyclones to develop off SW Mexico and south of Baja Calif. Troughing still occurs in the westerlies, but the westerlies are displaced well to the north now during the early to mid-summer period. Moisture for TSTMS in the...

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