Indonesia's Atmospheric Dynamics Analysis III May 2026 - BMKG

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IOD and ENSO Analysis and Forecast: Monitoring results for III May 2026 showed a monthly IOD index (-0.92) which is below normal but may not be categorized as a negative IOD phenomenon since it only started to occur one month ago. Meanwhile, the monthly ENSO index (+1.04) indicates El Nino Condition.

Heavy Rainfall Early Warning: applicable to "I June 2026" at Waspada: Several regency/city districts in Central Java Province. Siaga: No warning. Awas: No warning.

Meteorological Drought Early Warning: applicable to "I June 2026" at Waspada: Some regency/city districts in West Nusa Tenggara Province. Siaga: No warning. Awas: No warning.

III May 2026 Rainfall Analysis:

Musim Kemarau Development Analysis III May 2026:

II June – III June 2026 Rainfall Forecast:

According to BMKG analysis, rainfall in the coming period will mostly be at a low to medium level (0-150 mm per period) over most regions. Areas expected to experience very low rainfall (<50 mm per period) will include:

Forecast Rainfall Less Than 50 mm/Month for June – November 2026:

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Based on analysis from 105 BMKG observation stations, average air temperature in May 2026 was 27.5°C. Normal climatological air temperature for May (period 1991-2020) in Indonesia was 27.0°C (in the normal range of 20.58°C–29.49°C). Based on these values, the average air temperature anomaly for May 2026 shows a positive anomaly of 0.5°C. The anomaly [ …]

Groundwater Availability for Plants (GAW) Using the Balance of Water Method with the Thornthwaite and Mather Method. GAW is calculated using the following equation: ((KAW–TLP)/(KL–TLP)) x 100%. With criteria: Less: if groundwater availability < 40%; Moderate: if groundwater availability is 40%–60%.; Adequate: if groundwater availability [ …]

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2026 - Agency for Meteorology, Climatology, and Geophysics