The Imprint of Strong-Storm Tracks on Winter Weather in North America

Lukens, K. E.; Berbery, E. H.; Hodges, K. I.

doi:10.1175/jcli-d-17-0420.1

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The Imprint of Strong-Storm Tracks on Winter Weather in North America

2018
By Lukens, K. E. ; Berbery, E. H. ; Hodges, K. I.
Source: Journal of Climate, 31(5), 2057-2074

[PDF-3.89 MB]

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Journal Title:

Journal of Climate
Personal Author:

Lukens, K. E. ; Berbery, E. H. ; Hodges, K. I.

Lukens, K. E. ; Berbery, E. H. ; Hodges, K. I. Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; CICSM (Cooperative Institute for Climate and Satellites Maryland)

NESDIS (National Environmental Satellite, Data, and Information Service) ; CICSM (Cooperative Institute for Climate and Satellites Maryland) Less -
Description:

Northern Hemisphere winter storm tracks and their relation to winter weather are investigated using NCEP CFSR data. Storm tracks are described by isentropic PV maxima within a Lagrangian framework; these correspond well with those described in previous studies. The current diagnostics focus on strong-storm tracks, which comprise storms that achieve a maximum PV exceeding the mean value by one standard deviation. Large increases in diabatic heating related to deep convection occur where the storm tracks are most intense. The cyclogenesis pattern shows that strong storms generally develop on the upstream sectors of the tracks. Intensification happens toward the eastern North Pacific and all across the North Atlantic Ocean, where enhanced storm-track-related weather is found. In this study, the relation of storm tracks to near-surface winds and precipitation is evaluated. The largest increases in storm-track-related winds are found where strong storms tend to develop and intensify, while storm precipitation is enhanced in areas where the storm tracks have their highest intensity. Strong storms represent about 16% of all storms but contribute 30%–50% of the storm precipitation in the storm-track regions. Both strong-storm-related winds and precipitation are prone to cause storm-related losses in the eastern U.S. and North American coasts. Over the oceans, maritime operations are expected to be most vulnerable to damage offshore of the U.S. coasts. Despite making up a small fraction of all storms, the strong-storm tracks have a significant imprint on winter weather in North America potentially leading to structural and economic loss.
Keywords:

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Cyclones Precipitation Wind
Source:

Journal of Climate, 31(5), 2057-2074
DOI:

https://doi.org/10.1175/jcli-d-17-0420.1
Document Type:

Journal Article
Funding:

Grant no. NA14NES4320003
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CHORUS
Main Document Checksum:

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urn:sha256:c0021d9cb90ddec6bcd0ba36aa442daf61c203dd94c69529225cf81b0fc8d4cf
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https://repository.library.noaa.gov/view/noaa/48336/noaa_48336_DS1.pdf
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The Imprint of Strong-Storm Tracks on Winter Weather in North America

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