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Showing 1 to 8 of 8 for “"Comma-head"”.
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Electric charging in the comma-head regions of continental winter cyclones
Lightning in the comma-head region of winter cyclones is a relatively rare phenomenon. The nature of the electric charging in wintertime precipitation bands is unknown. During the ProfiLing Of Winter Storms (PLOWS) project, the surface electric field was measured using an electric field mill (EFM) …
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Precipitation growth processes in the comma head region of an east coast winter storm
… States, contributing 20-30 cm of snowfall in its comma head region. As part of the Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) field campaign, precipitation within the comma head region was sampled by two research aircraft, providing a …
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Analysis of vertical velocities and elevated instability in the comma-head of continental winter cyclones
… convection and generating cells within the comma heads of three continental winter cyclones are investigated using the Wyoming W-band Cloud Radar mounted on the NSF/NCAR C-130, supplemented by analyses from the Rapid Update Cycle model and WSR-88D data. The cyclones followed three distinct …
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Investigation of the comma-head stability structure of wintertime mid-latitude cyclones using high-resolution observations
… to precipitation substructures found in the comma-head (wrap-around) region of wintertime cyclones. The wrap-around region is comprised of two sectors: northern and southern. The southern sector is characterized by dry air advancing northward over the warm front. This dry air intrusion …
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Structure and statistical analysis of the microphysical properties of the comma-head region of cold-season midlatitude cyclones
… and processes producing precipitation in the comma-head region of cold-season continental cyclones, using data collected by the W-band Wyoming Cloud Radar and in-situ instrumentation aboard the NSF/NCAR C-130 research aircraft during the 2009-10 Profiling of Winter Storms (PLOWS) field …
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A comparison of X-band polarization parameters with in-situ microphysical measurements in the comma head of two winter cyclones
… probes, made multiple passes through the comma head of two cyclones as the Mobile Alabama X-band (MAX) dual-polarization radar performed range-height indicator scans in the same plane as the C-130 flight track. On 14-15 February and 21-22 February 2010, 579 and 202 coincident data points, …
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The role of lake enhancement in the evolution of the 2011 Chicago-area Groundhog's Day blizzard
… the lakes removed. Prior to the arrival of the comma head, reverse lake effect precipitation was noted only in the with-lakes run, indicating that the lakes were effectively removed from the model. During cyclone passage, downwind modification of stability and thermal structure was noteworthy in …
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Dynamics of cloud-top generating cells in winter cyclones
… (GCs) are ubiquitous in the warm-frontal and comma-head regions of midlatitude winter cyclones. The presence of fall streaks emanating from the GCs, and their persistence either to the surface or until merging into precipitation bands suggests that GCs are a critical component of the …