Category Archives: NW Flow Snow

The primary focus of the Northwest Flow Snowfall Discussion Group is the forecast problem of northwest flow snowfall in the Appalachian Mountains. The group meets periodically throughout the year by way of telephone conference to discuss recent/upcoming northwest flow snowfall events, research updates, local modeling efforts, and other notable developments pertinent to the northwest flow snowfall phenomenon.

Arctic Cold Frontal Passage Through Asheville, North Carolina on 6 January 2014

A number of weather balloon launches occurred at the campus of UNC Asheville every three hours from 0600 through 1500 UTC on Monday, 6 January 2014 to document the passage of a cold front associated with an arctic air mass … Continue reading

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Potential for a “surprise” NW flow snow event on 23, 24 December 2013?

It is interesting to look at the GFS forecast (1200 UTC init) for overnight Monday (23 December) ¬†into Tuesday morning (24 December) as very little precipitation is predicted for western NC. This might be an interesting case to see if … Continue reading

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Watch for banded snow showers developing at night during current late-season NW Flow Snow event.

What is expected to be an impressive late season NW Flow Snow event to ring in the Spring season has begun today (Monday March 25th, and may last well into Wednesday or Wednesday night). One interesting aspect of these events … Continue reading

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New article in WAF having NW Flow Snowfall as its primary topic

A study based on WRF model simulations investigating the sensitivity of snowfall amounts in NW Flow Snowfall to surface fluxes upstream of the southern Appalachian Mountains can be found in the October 2012 issue of WAF, accessible via the AMS … Continue reading

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Northwest Flow Snowfall Discussion Group Joins CIMMSE

The primary focus of the Northwest Flow Snowfall (NWFS) Discussion Group is exploring the forecast problem of northwest flow snowfall in the Appalachian Mountains. An example winter event is shown to the right with the observed snow accumulation and the … Continue reading

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Winter 2011-2012 Northwest Flow Snow Event Reviews

This post is a bit off-season, but I want to remind all interested parties that a couple of event reviews from this past winter¬†are available on the Northwest Flow Snow Discussion Group’s web page. http://www.erh.noaa.gov/gsp/localdat/NWFS_discussion_group/nwfs_discussion_group.html Or, directly here: The Northwest … Continue reading

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Effects of Upstream Soil Moisture on NW Flow Snow Events

For those who have not been participating in the discussion group related to NW Flow Snow in the southern Appalachians, I wanted to briefly pass along a very short summary of some interesting model simulation work on the impacts of … Continue reading

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