Data and trust
Normalized Difference Vegetation Index from VIIRS on NOAA-20.
Limits. Clouds leave gaps; compare with earlier dates, not with other regions.
How to read it
0 = bare ground to 0.8-0.9 = dense green. Browner than usual in farmland = drought stress.
Why it matters for Koh Samui
Drought shows up in rice and fruit areas of Thailand weeks before crop reports.
ENSO status now
- ONI (NOAA CPC)
- +1.80 °C, JJA 2026 (previous +1.39 °C)
- RONI (NOAA CPC)
- +1.36 °C, JJA 2026
- Nino 3.4 weekly (NOAA CPC / OISST)
- +3.0 °C anomaly, week of 16 Sep 2026 (SST 29.6 °C)