Graham McIntire
0f0e5e8d43
Phase 3 NEXRAD spike: IEM n0q composite available at 5-min cadence back to 2022+. Compression-ratio proxy shows afternoon images have 13-81% more texture than dawn (directionally correct), but the n0q product thresholds out the faint clear-air returns needed for BL stability detection. Parked until MRMS or Level III products can be investigated. See docs/research/nexrad_spike.md. Phase 6: hrrr_climatology table aggregating surface_temp_c by (lat, lon, month, hour) from the 42M+ hrrr_profiles grid-point rows. mix hrrr_climatology builds it via a single SQL GROUP BY + upsert. Backtest.Features.temperature_anomaly computes current_temp minus climatological mean — the meteorologist's "temperature deviation above normal" predictor for summer afternoon enhancement. |
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