First published Oct 21, 2026, 1:16:15 PM UTC · Last updated Oct 21, 2026, 1:16:15 PM UTC

Thunderstorms and lightning

Thunderstorm Tonight in Kalimantan Timur

Reported by Indonesia BMKG Weather Alerts

A forecast calls for thunderstorms and heavy rain beginning 21 October 2026 at 21:00 WITA in parts of Kalimantan Timur, especially Gunung Tabur, Muara Ancalong, Pulau Derawan, and Sambaliung; conditions may bring reduced visibility, strong winds, and localized flooding. The source advises vigilance and limiting outdoor activity, with gradual improvement expected by 22:30 WITA.

At a glance

Affected location: Kalimantan Timur

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Why it matters

The forecasted conditions are imminent and the source advises the public to take precautions.

Location

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Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 5/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 8/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

Indonesia BMKG Weather Alerts Thunderstorm Tonight in Kalimantan TimurBMKG — Indonesian Agency for Meteorology, Climatology, and Geophysics

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Related developments reported in the last 30 days. These are not necessarily ongoing incidents.

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Thunderstorm Tonight in Kalimantan TengahOct 21, 2026, 1:23 PM UTC
Thunderstorms and heavy rainfall are forecast in parts of Kalimantan Tengah, especially Paju Epat, from 20:30 to 22:30 WIB on 21 October 2026. The source advises vigilance, limiting outdoor activities, and taking precautions.
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Thunderstorm This Evening in Kalimantan TengahOct 21, 2026, 9:30 AM UTC
Thunderstorms and heavy rainfall are forecast in parts of Kalimantan Tengah, especially Batu Ampar, starting at 16:40 WIB on 21 October 2026 and gradually easing by 19:00 WIB. The source warns of possible reduced visibility, strong winds, and localized flooding, and advises vigilance, limiting outdoor activities, and taking precautions.
Nearby · within 200 km
Thunderstorm This Evening in Kalimantan TengahOct 21, 2026, 9:30 AM UTC
Thunderstorms and heavy rainfall were forecast for parts of Kalimantan Tengah, especially Batu Ampar, starting at 16:40 WIB on 21 October 2026 and gradually improving by 19:00 WIB. The source warned of possible reduced visibility, strong winds, and localized flooding, and advised the public to take precautions.
Nearby · within 200 km
Thunderstorm This Evening in Kalimantan TimurOct 21, 2026, 8:59 AM UTC
2 reports describing the same event are grouped here. Expand the group to review every source report.
Same topic
Thunderstorm Tonight in Kalimantan UtaraOct 21, 2026, 12:50 PM UTC
Thunderstorms and heavy rain are forecast from 21:00 to 00:00 WITA across parts of Kalimantan Utara, including Krayan, Malinau Utara, and Peso. The forecast warns of possible reduced visibility, strong winds, and localized flooding, and advises the public to take precautions.

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