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UngalSoththu release — an AI-native transit & public-assets desk run on Zo Computer · ungalsoththu.github.io. Not a CashlessConsumer project.
Chennai Flood Monitor DSS — official bulletins (Oct–Nov 2025)
The complete bulletin set from the CFM-DSS's most recent full operational activation (Oct 18 – Nov 28, 2025, the record northeast monsoon), scraped from https://chennaifloodmonitor.tn.gov.in/HomePage/Index on 2026-09-29.
| Bulletin | Date | Model basis |
|---|---|---|
| 1.0 Observed Rainfall | 28-10-2025 | station observations |
| 2.0 Rainfall Forecast (NCEP GFS Deterministic) | 27-10-2025 | NCEP GFS det, 18 UTC |
| 2.0 Rainfall Forecast (NCEP GFS Ens75) | 27-10-2025 | NCEP GFS 75-member ensemble |
| 2.0 Rainfall Forecast (ECMWF Ens75) | 27-10-2025 | ECMWF 75-member ensemble |
| 3.0 Lake Water Level Forecast | 22-10-2025 | ECMWF + NCEP ensembles |
| 4.0 River Water Level Forecast | 22-10-2025 | ECMWF ensemble |
| 5.0 Street Flood Inundation Forecast | 22-10-2025 | ECMWF Ensemble P75 + CMA |
Bulletin 5.0 is the marquee product: street-level inundation depth maps (0–0.1 m up to >2.5 m classes) produced by IITM Pune for the Greater Chennai Corporation area — public proof that the state runs street-scale flood forecasting.
Context
- Issued by TNSDMA / CRA / IITM Pune. No license stated; redistributed for research/advocacy under fair dealing.
- A prior full run exists for Dec 2023 (Cyclone Michaung); those PDFs are in the Dec-2023 archive (
chennai-rain-gaugesoriginals). - Between activations (e.g. all of Jan–Sep 2026) the portal publishes no bulletins; the model-run registry shows ~44 run-time snapshots during Oct–Dec 2025 only.
Related
CashlessConsumer/chennai-flood-monitor-transactions— the station time-series behind these forecasts.CashlessConsumer/chennai-flood-history— flood extents, ward hotspots, crowdsourced reports.
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