Author Archives: skeighton

Late Spring HSLC Tornadoes across the Carolinas and Virginia: 4-5 May 2017

Posted on September 5, 2017 by skeighton

In association with a high amplitude closed upper low over the Mississsippi Valley, and a retreating wedge front at the surface, a mainly late night outbreak of wind damage and tornadoes occurred in a classic high shear, low CAPE (HSLC) … Continue reading →

Posted in Uncategorized | 3 Comments

NWFS Collaboration Group authors “Northwest Flow Snow Aspects of Hurricane Sandy” in Feb. 2016 Weather and Forecasting

Posted on February 4, 2016 by skeighton

Just a short note to let readers know that several of us who have been collaborating on NW Flow Snow issues in the southern Appalachians now for a number of years have had our manuscript on the northwest flow snow … Continue reading →

Posted in Uncategorized | 1 Comment

NWA Journal of Meteorology article examines utility of total lightning data in weak shear Appalachian storms

Posted on May 15, 2015 by skeighton

A collaborative effort between VA Tech and the NWS Blacksburg office, funded by the GOES-R program, studied the potential utility of total lightning data (from Earth Networks Inc) in weak shear storms over the Central Appalachian region.   Recently, a summary … Continue reading →

Posted in Lightning | Tagged , , | 1 Comment

Recorded presentation on Utility of Total Lightning Data for Single-cell Storm Severity in Central Appalachians

Posted on May 8, 2014 by skeighton

VA Tech graduate student Paul Miler recently completed work that was part of a GOES-R COMET Partner’s Project between VT and NWS Blacksburg on the potential utility of total lightning data (archived data from ENI) in diagnosing the severity of … Continue reading →

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High-Shear, Low-CAPE Environment Yields EF1 Tornado in King, NC on 21 Sept 2013

Posted on September 27, 2013 by skeighton

Posted by Steve Keighton, WFO Blacksburg, VA Often, High-Shear Low CAPE (HSLC) events have clear signals of a severe weather threat due to strong frontal scale forcing, very high low-level wind shear, and/or weak but obvious instability.  Other times, these … Continue reading →

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

Posted on March 25, 2013 by skeighton

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 →

Posted in NW Flow Snow | 1 Comment

Classic Severe MCS “Not-crossing” Case this morning

Posted on April 26, 2012 by skeighton

No detailed review here, but thought I’d just take this opportunity since we had a strong MCS (mature bow echo) approaching the west side of the southern Appalachians this morning, with a history of severe weather (see below), to remind … Continue reading →

Posted in Convection | 1 Comment

Effects of Upstream Soil Moisture on NW Flow Snow Events

Posted on January 20, 2012 by skeighton

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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GoToMeeting Presentation on NW Flow Snow Simulations

Posted on October 14, 2011 by skeighton

I thought I’d post this here for wider distribution, and since the NW Flow Snow research efforts are a spin off of past CSTAR activities. On Oct 26 at 1pm, Doug Miller (UNC-A) will be presenting a summary of his … Continue reading →

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Another great HSLC case to add

Posted on April 6, 2011 by skeighton

I think we should consider adding the April 4-5 late night QLCS event to our database (it will be in my spreadsheet anyway).  SBCAPE near zero in our area but MUCAPE maybe nudging up toward 500 J/kg along NC/VA border. … Continue reading →

Posted in High Shear Low Cape Severe Wx | 5 Comments