September 14, 2015 (Micro-Briefing)

  • August precipitation was below-average overall for the region, with most of Colorado, Wyoming, and western Utah being drier than normal, while northeastern and far southern Utah, and northeastern Wyoming, were much wetter than normal. August temperatures were near average over most of the region, with few departures greater than 2°F.
  • The vast majority of reservoirs in Colorado and Wyoming had above-average storage for the end of August, while most of Utah's reservoirs had below-average storage. As of the end of August, Lake Powell storage was 12.64 MAF, compared to 12.31 MAF on the same date last year.
  • El Niño conditions have increased strength in the past month and by several measures this is now one of the three strongest events since 1950. NOAA CPC precipitation outlooks for our region show a wet tilt through fall and early winter, partly due to El Niño’s expected influence.

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