Analysis of Extreme Weather in the Waters of West Kalimantan using the WRF-ARW Model (Case Study 13-14 July 2021)

Juliana, Tarisya; Adriat, Riza; Ardianto, Randy; Ihwan, Andi; Sutanto, Yuris

doi:10.70561/geocelebes.v10i1.43141

Open access Jurnal

Analysis of Extreme Weather in the Waters of West Kalimantan using the WRF-ARW Model (Case Study 13-14 July 2021)

JURNAL GEOCELEBES · Vol. 10 No. 1 (2026) · pp. 34–47

DOI: 10.70561/geocelebes.v10i1.43141
ISSN: 2579-5546, 2579-5821
Published: 2026-04-01
Publisher: Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar
Language: en
License: creativecommons.org/licenses/by-nc-sa/4.0

Abstract

On 13 July 2021, there was an extreme weather phenomenon in the waters of West Kalimantan. The extreme weather resulted in several fishing boats sinking and causing 136 casualties. This study aims to analyze atmospheric conditions during extreme weather on July 13-14, 2021. In running the WRF-ARW model, verification is carried out using the dichotomy method (Accuracy, POD, FAR) and RMSE to determine the model's accuracy in simulating extreme weather events. The RMSE verification results show an error value of 4,97. The results of the WRF-ARW model output show that the extreme weather that occurs is caused by the presence of a convergence wind zone with a maximum wind speed of 18 m/s, causing the formation of cumulonimbus clouds. OLR simulations show a low value of 122 watts/m², indicating a lot of cloud cover with the potential for rain. The emergence of this convection zone causes strong winds, which cause high waves, thus contributing to ship accidents.

Keywords

Collaboration network of the authors

14 authors · 36 co-authorship links

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Co-author	Organisation	Joint articles
Muhammad Ishak Jumarang	Affiliation unknown	4
Muliadi Muliadi	Affiliation unknown	3
Lusyndatul Massuro	Affiliation unknown	3
Elyda Yani	Affiliation unknown	3
Nurputri Nurputri	Affiliation unknown	1
Firdaus Hamid	Affiliation unknown	1
Kenny Edward Yap	Affiliation unknown	1
Andi Asadul Islam	Affiliation unknown	1
Junus Asiu Bulu Baan	Affiliation unknown	1

Affiliations come from OpenAlex; journal OAI-PMH metadata carries none. Authors without an OpenAlex ID are matched by name, which can merge or split people.

Metadata source: OAI-PMH (metadata jurnal) https://journal.unhas.ac.id/index.php/geocelebes/oai, first harvested 3 Nov 2026, last seen 3 Nov 2026.

Original metadata (oai_dc)

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	<dc:title xml:lang="en">Analysis of Extreme Weather in the Waters of West Kalimantan using the WRF-ARW Model (Case Study 13-14 July 2021)</dc:title>
	<dc:creator xml:lang="en">Juliana, Tarisya</dc:creator>
	<dc:creator xml:lang="en">Adriat, Riza</dc:creator>
	<dc:creator xml:lang="en">Ardianto, Randy</dc:creator>
	<dc:creator xml:lang="en">Ihwan, Andi</dc:creator>
	<dc:creator xml:lang="en">Sutanto, Yuris</dc:creator>
	<dc:subject xml:lang="en">Extreme Weather</dc:subject>
	<dc:subject xml:lang="en">West Kalimantan</dc:subject>
	<dc:subject xml:lang="en">WRF</dc:subject>
	<dc:description xml:lang="en">On 13 July 2021, there was an extreme weather phenomenon in the waters of West Kalimantan. The extreme weather resulted in several fishing boats sinking and causing 136 casualties. This study aims to analyze atmospheric conditions during extreme weather on July 13-14, 2021. In running the WRF-ARW model, verification is carried out using the dichotomy method (Accuracy, POD, FAR) and RMSE to determine the model's accuracy in simulating extreme weather events. The RMSE verification results show an error value of 4,97. The results of the WRF-ARW model output show that the extreme weather that occurs is caused by the presence of a convergence wind zone with a maximum wind speed of 18 m/s, causing the formation of cumulonimbus clouds. OLR simulations show a low value of 122 watts/m², indicating a lot of cloud cover with the potential for rain. The emergence of this convection zone causes strong winds, which cause high waves, thus contributing to ship accidents.</dc:description>
	<dc:publisher xml:lang="en">Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar</dc:publisher>
	<dc:date>2026-04-01</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
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	<dc:type xml:lang="en">Peer-reviewed Article</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.unhas.ac.id/index.php/geocelebes/article/view/43141</dc:identifier>
	<dc:identifier>10.70561/geocelebes.v10i1.43141</dc:identifier>
	<dc:source xml:lang="en">JURNAL GEOCELEBES; Vol. 10 No. 1: April 2026; 34–47</dc:source>
	<dc:source>2579-5546</dc:source>
	<dc:source>2579-5821</dc:source>
	<dc:language>en</dc:language>
	<dc:relation>https://journal.unhas.ac.id/index.php/geocelebes/article/view/43141/14254</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2026 JURNAL GEOCELEBES</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by-nc-sa/4.0</dc:rights>
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