First published Oct 21, 2026, 3:01:15 PM UTC · Last updated Oct 21, 2026, 3:01:15 PM UTC

Thunderstorms and lightning

Thunderstorm Tonight in Sumatera Utara

Reported by Indonesia BMKG Weather Alerts

Thunderstorms and heavy rainfall are forecast from 21 October 2026 at 21:35 WIB in parts of Sumatera Utara, including Bahorok, Danau Toba, Pangururan, and other listed areas. The source says conditions may bring reduced visibility, strong winds, and localized flooding, with gradual improvement expected by 22 October at 00:35 WIB.

At a glance

Affected location: Sumatera Utara

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Why it matters

The public is 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 Tonight in Sumatera 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 Tonight in Sumatera UtaraOct 21, 2026, 2:25 PM UTC
Thunderstorms and heavy rain are forecast in parts of Sumatera Utara from 21 October 2026 at 21:35 WIB until 22 October at 00:35 WIB. Reduced visibility, strong winds, and localized flooding are possible, and the public is advised to take precautions.
Nearby · within 200 km
Thunderstorm This Evening in Sumatera UtaraOct 21, 2026, 11:10 AM UTC
2 reports describing the same event are grouped here. Expand the group to review every source report.
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Thunderstorm Tonight in RiauOct 21, 2026, 3:15 PM UTC
Thunderstorms and heavy rainfall are forecast in parts of Riau from 21 October 2026 at 22:25 WIB, with conditions expected to improve by 22 October at 01:00 WIB. The source warns of reduced visibility, strong winds, and localized flooding.
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Thunderstorm Tonight in Kalimantan TengahOct 21, 2026, 3:08 PM UTC
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The National Weather Service in Flagstaff issued a warning for Yavapai County until 8:15 AM MST. At 7:49 AM, radar indicated a severe thunderstorm capable of producing a tornado and quarter-size hail.
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Lightning is Likely to occur over krs-nagayalanka Mandal . Please follow SDMA guidelines.Oct 21, 2026, 2:32 PM UTC
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