August 29th Mountain Weather Forecast

The Weekend Weather Forecast for the High Country of Rocky Mountain National Park
chiefshead south face spur

The South Face of Chiefshead in RMNP.

Thursday, August 29th, 2013

Rocky Mountain National Park Weather Forecast

Researched and written by professional meteorologist and avid mountaineer, Dan The Weather Man Gottas.

Week in Review

Over the past week, the greatest convective instability and accompanying disturbed weather shifted west of RMNP, where a plume of monsoonal moisture arced north-northeastward across AZ and UT.


However, RMNP was not exempt from afternoon shower and thunderstorm activity, owing greatly to the easterly upslope flux of lower-level moisture from the northeastern plains.  


Week-long rain totals across most sub-alpine locations, as measured by rain gauges, were in the 0.6" to 1.2" range.


Temperatures remained seasonably warm through the week, with highs 60-65 F and lows 45-55 F near 10.5K.  Winds were most frequently out of the southwest at speeds less than 15 mph near treeline.


  Stormy weather along the Continental Divide continued this past week with more on the way.

Last week's medium-range forecast for a longer-lived episode of drier and more stable weather during the first week of September will likely not come to pass.  Instead, strong ridging across the southern and central Rockies will persist and continue to anticyclonically circulate subtropical moisture into the region.

But, all is not lost (soggy), as a shorter-term period of stable weather is still in the cards.  A two-day period of dry, subsident northwesterly flow will ride on the tails of a passing coldfront on Sunday and Monday (9/1-2).  Skies are currently forecast to remain free of t-storms and precipitation during that time.  Wind speeds will increase across the higher terrain under the favorable northwesterly direction, but will remain tame owing to a weak pressure gradient aloft.

Surrounding the dry reprieve, moisture transports from both the west and east are forecast to support diurnally-driven showers/thunderstorms on 8/30-31 and 9/3-6 across RMNP.

img 0226
Sunrise over the Front Range as moisture reaches all elevations of the Front Range this last week.


Detailed 7-Day Forecast

NWS Forecast for the 12,000 foot level near Longs Peak

The link above will take you to the National Weather Service forecast for the 12,000 foot level near Longs Peak. These forecasts are derived from computer-generated numerical forecasts, and are updated shortly after 3:30 am, 9:30 am, 3:30 pm, and 9:30 pm local time. In the lower right-hand corner of the page, one can view forecasts for other locations in the Park by clicking on the desired location in the terrain map.



Do-It-Yourself Weather Forecast Links

Weather Observations and Forecasts

The link above provides a list of web links to various sites containing a variety of meteorological data and information. Collectively, these resources can be used to monitor and study current weather conditions, as well short-term, medium-range, and climate forecasts.


© ClimbingLife LLC, 2013  All Rights Reserved.


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