First published Oct 21, 2026, 3:15:15 AM UTC · Last updated Oct 21, 2026, 3:15:15 AM UTC

Thunderstorms and lightning

Thunderstorm This Afternoon in Kalimantan Utara

Reported by Indonesia BMKG Weather Alerts

Thunderstorms and heavy rain are forecast from 11:00 WITA on 21 October 2026 in parts of Kalimantan Utara, including Bunyu, Nunukan, Sebuku, Sekatak, Sembakung, Tana Lia, and Tulin Onsoi. The source warns of possible reduced visibility, strong winds, and localized flooding, advises precautions, and says conditions should improve by 13:30 WITA.

At a glance

Affected location: Kalimantan Utara

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Why it matters

The forecast names several affected areas and advises people to stay vigilant and limit outdoor activities.

Location

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Generated scores

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

Confidence: 6/10How 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: 7/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

Indonesia BMKG Weather Alerts Thunderstorm This Afternoon in Kalimantan UtaraBMKG — 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.

Nearby · within 200 km
Thunderstorm This Morning in Kalimantan UtaraOct 21, 2026, 12:15 AM UTC
Thunderstorms and heavy rain are forecast in parts of Kalimantan Utara from 08:20 to 11:00 WITA on 21 October 2026. The alert cites possible reduced visibility, strong winds and localized flooding, and advises vigilance and limiting outdoor activities.
Nearby · within 200 km
Thunderstorm This Morning in Kalimantan UtaraOct 20, 2026, 10:10 PM UTC
Thunderstorms and heavy rainfall were forecast from 06:15 to 08:15 WITA on 21 October 2026 in parts of Kalimantan Utara. The alert warned of possible reduced visibility, strong winds, and localized flooding, and advised vigilance and limiting outdoor activities.
Nearby · within 200 km
Thunderstorm This Morning in Kalimantan UtaraOct 20, 2026, 10:10 PM UTC
Thunderstorms and heavy rain are forecast across 13 named localities in North Kalimantan from 06:15 to 08:15 WITA on 21 October 2026. Reduced visibility, strong winds, and localized flooding are possible.
Nearby · within 200 km
Thunderstorm Tonight in Kalimantan UtaraOct 19, 2026, 7:08 PM UTC
2 reports describing the same event are grouped here. Expand the group to review every source report.
Nearby · within 200 km
Thunderstorm This Evening in Kalimantan UtaraOct 19, 2026, 7:40 AM UTC
2 reports describing the same event are grouped here. Expand the group to review every source report.
Nearby · within 200 km
Thunderstorm Tonight in Kalimantan UtaraOct 18, 2026, 6:30 PM UTC
Thunderstorms and heavy rainfall are forecast in parts of Kalimantan Utara, especially Lumbis Ogong and Tulin Onsoi, from 02:42 WITA on 19 October 2026. The source warns of reduced visibility, strong winds and localized flooding, and advises vigilance and precautions.

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