THE “CYCLONE” – BEFORE THE HIMAWARI’S VERY EYES.
December 05, 2025
Himawari-9 is the geostationary meteorological satellite of the Japan Meteorological Agency (JMA). The Advanced Himawari Imager instrument provides imagery every 10 minutes.
Since March 2022, Gazer’s Digest is updated with the latest imagery provided by the JMA.
On 24 November 2025, the Met Department (Sri Lanka) expected that the atmospheric disturbance near Sri Lanka would develop into a low-pressure system by 25 November 2025. Consequently, the prevailing showery conditions over Sri Lanka were expected to continue.
How many gallons of water fell from the sky onto mountainous areas in Sri Lanka, during 27 - 28 November 2025?
Rainfall was averaging 421 mm (max:496 mm and min:380 mm) a day (for the 24 hours ending at 1800 Sri Lanka Standard Time (SLST), on 27 November 2025) and occurred in four stations in four districts—Matale, Kandy, Nuwara Eliya, and Badulla.
The low-pressure area to the southeast of Sri Lanka gradually intensified into a cyclone—Ditwah.
According to the Met Department (Sri Lanka) weather forecast issued at (SLST) 1400 on 27 November 2025, the low- pressure area to the southeast of Sri Lanka intensified into a depression, and centred near 6.7°N 82.1°E 120 km off Batticaloa and was expected to strengthen within the next 12 hours.
Rainfall was averaging 302 mm (max:358.5 mm and min:230.4 mm) a day (for the 24 hours ending at 0830 Sri Lanka Standard Time (SLST), on 28 November 2025) and occurred in eight stations in eight districts—Anuradhapura, Mullaitivu, Vavuniya, Nuwara Eliya, Kandy, Ratnapura, Trincomalee, and Puttalam.
Heavy rains would certainly help floods and landslides to reach their targets with ease. The rain poured down, affected paddy, vegetable cultivation, and food supply chains; even though it will be used to provide zero-emission power to a staggering number of homes.
Rainfall - Hydro Catchment Areas
The 24 hours ending at 0830 SLST on 28 November 2025.
| Rainfall Station | Rainfall (mm) |
|---|---|
| Norton | 358.2 |
| Randenigala | 336.7 |
| Lakshapana | 294.3 |
| Rantambe | 278.8 |
| Castlereigh | 275.0 |
| Ukuwela | 272.0 |
| Canyon | 271.6 |
| Kotmale | 253.0 |
| Upper Kotmale | 225.1 |
| Maskeliya | 207.5 |
| Bowatenna | 204.2 |
| Victoriya | 200.0 |
| Maussakele | 182.0 |
| Kukuleganaga | 130.0 |
| Samanala Wawa | 77.0 |
| Inginiyagala | 48.4 |
The weather forecast on 28 November 2025 - the Department of Meteorology, Sri Lanka.
The weather forecast issued at (SLST) 1400 on 28 November 2025, the Cyclonic Storm "Ditwah" was centred near latitude 8.4°N and longitude 81.0°E, about 30 km Southwest of Trincomalee at (SLST) 1130 on 28 November 2025.
By (SLST) 0900 on 29 November 2025, the cyclone moved away from Sri Lanka.
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