Tropical Cyclone Supercell Response to the Coast Using a Climatology of Radar-Derived Azimuthal Shear

Alford, A. A.; Messersmith, A.; Pollock, B.; Thomas, Q.; Sandmæl, T. N.; Schenkel, B. A.

doi:10.1029/2023GL105977

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Tropical Cyclone Supercell Response to the Coast Using a Climatology of Radar-Derived Azimuthal Shear

2023
By Alford, A. A. ; Messersmith, A. ; Pollock, B. ; ...
Source: Geophysical Research Letters, 50, e2023GL105977

[PDF-1.75 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Alford, A. A. ; Messersmith, A. ; Pollock, B. ; Thomas, Q. ; Sandmæl, T. N. ; ... More +

Alford, A. A. ; Messersmith, A. ; Pollock, B. ; Thomas, Q. ; Sandmæl, T. N. ; Schenkel, B. A. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) ; CIWRO (Cooperative Institute for Severe and High-Impact Weather Research and Operations)

OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) ; CIWRO (Cooperative Institute for Severe and High-Impact Weather Research and Operations) Less -
Description:

Supercells in landfalling tropical cyclones (TCs) often produce tornadoes that can cause fatalities and extensive damage. In previous studies, many tornadoes have been shown to form <50 km from the coast, and their parent storms may also intensify as they cross the coastal boundary. This study uses WSR-88D observations of TC tornadic mesocyclones from 2011 to 2018 to examine changes in their low-level rotation upon moving onshore. We will show that radar-derived azimuthal shear tends to increase in storms that cross the coastal boundary. Similar intensification trends are also found in radar-derived (supercell) storm-scale divergence, such that storm-scale convergence increases as storms move onshore. It is likely changes in the near-coast vertical wind shear and/or near-shore convergence helps explain supercell intensification, which is important to consider particularly in operational settings.
Keywords:

[+]

Climatology Cyclones Radar Tornadoes Supercells
Source:

Geophysical Research Letters, 50, e2023GL105977
DOI:

https://doi.org/10.1029/2023GL105977
Format:

PDF
Document Type:

Journal Article
Funding:

Grant no. NA21OAR4320204
License:

https://creativecommons.org/licenses/by/4.0/
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CC BY
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Submitted
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[+]

urn:sha256:e57b5583385c562002fcd2f09612cadc0571743f6ccf116a58c2cbbc8c0512dd
Download URL:

https://repository.library.noaa.gov/view/noaa/56131/noaa_56131_DS1.pdf
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