Author Archives: skeighton

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

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

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

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

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

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

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

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 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.

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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Classic Severe MCS “Not-crossing” Case this morning

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