First published Oct 21, 2026, 1:28:15 AM UTC · Last updated Oct 21, 2026, 1:28:15 AM UTC

Thunderstorms and lightning

Thunderstorm This Morning in Kalimantan Utara

Reported by Indonesia BMKG Weather Alerts

Thunderstorms and heavy rainfall are forecast from 08:20 to 11:00 WITA on 21 October 2026 in parts of Kalimantan Utara, including Betayau, Bunyu, and Tarakan. The source warns of reduced visibility, strong winds, and possible localized flooding.

At a glance

Affected location: Kalimantan Utara

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Why it matters

People in the affected areas are advised to remain vigilant, limit outdoor activities, and 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: 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 Morning 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 TengahOct 20, 2026, 12:00 PM UTC
Thunderstorms and heavy rainfall were forecast from 19:10 to 21:00 WIB on 20 October 2026, especially in Bulik, Kalimantan Tengah. The alert warned of reduced visibility, strong winds, and localized flooding.
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Severe Thunderstorm Warnings — TucsonOct 21, 2026, 1:08 AM UTC
2 related advisories are grouped here. Expand the group to review every affected area and source advisory.
Same topic
Thunderstorm This Morning in RiauOct 21, 2026, 12:40 AM UTC
Thunderstorms and heavy rain were forecast for parts of Riau on 21 October 2026, with possible reduced visibility, strong winds, and localized flooding. The source advises vigilance and limiting outdoor activity; conditions were expected to ease by 10:00 WIB.

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