On the Forecast Sensitivity of MCS Cold Pools and Related Features to Horizontal Grid Spacing in Convection-Allowing WRF Simulations

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dc.contributor.author Squitieri, Brian
dc.contributor.author Gallus, William
dc.contributor.author Gallus, William
dc.contributor.department Geological and Atmospheric Sciences
dc.contributor.department Environmental Science
dc.contributor.department Human Computer Interaction
dc.date 2020-12-20T01:58:22.000
dc.date.accessioned 2021-02-25T23:44:23Z
dc.date.available 2021-02-25T23:44:23Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2020
dc.date.issued 2020-04-01
dc.description.abstract <p>While the implementation of convection-allowing models has improved the representation of convective features, a consensus is lacking regarding what horizontal grid spacing most appropriately resolves convective structures, is computationally feasible, and provides the most useful output to forecasters. The present study evaluates 14 simulated MCSs with 3-, 1- and 0.333-km horizontal grid spacing in order to understand sensitivity in simulated MCS forward propagation speeds and cold pool behavior with decreased grid spacing. MCS cold pools were found to be significantly larger in runs using finer grid spacing. In addition, a greater similarity in solutions occurred when grid spacing was refined to 1 km and less, with 1- and 0.333-km MCS cold pools more similar in magnitude, depth, length, and areal coverage, than 3-km cold pools. The 1-km simulations demonstrated a small increase in forecast skill for 3-h QPF throughout MCS evolution compared to 3-km runs. The 1-km MCS 9-h precipitation swaths were also better aligned with observations compared to 3-km simulations. When evaluating MCS forward propagation speeds, however, 3-km simulated MCS speeds were more similar to observations compared to 1 km.</p>
dc.description.comments <p>This article is published as Squitieri, Brian J., and William A. Gallus Jr. "On the forecast sensitivity of MCS cold pools and related features to horizontal grid spacing in convection-allowing WRF simulations." <em>Weather and Forecasting</em> 35, no. 2 (2020): 325-346. DOI: <a href="https://doi.org/10.1175/WAF-D-19-0016.1" target="_blank">10.1175/WAF-D-19-0016.1</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ge_at_pubs/324/
dc.identifier.articleid 1337
dc.identifier.contextkey 20488457
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ge_at_pubs/324
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/96346
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ge_at_pubs/324/2020_GallusWilliam_ForecastSensitivity.pdf|||Fri Jan 14 23:35:56 UTC 2022
dc.source.uri 10.1175/WAF-D-19-0016.1
dc.subject.disciplines Atmospheric Sciences
dc.subject.disciplines Meteorology
dc.title On the Forecast Sensitivity of MCS Cold Pools and Related Features to Horizontal Grid Spacing in Convection-Allowing WRF Simulations
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 782ee936-54e9-45de-a7e6-2feb462aea2a
relation.isOrgUnitOfPublication 29272786-4c4a-4d63-98d6-e7b6d6730c45
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