anom

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Returns observations with 1991–2020 baseline comparisons at daily, weekly, or monthly granularity for a location and period. <br><b>When to use:</b> Graph or tabulate recent anomalies at a location for a specific period — e.g. 'how did last month compare to normal?' <br><b>Date format:</b> YYYYMMDD for ymd; use groupby (day/week/month) to control granularity. For 'last week' use YYYYMMDD of 7 days ago. For 'last month' use YYYYMM of prior month. <br><b>Performance:</b> Computed on demand; moderate speed. <br><b>Prerequisites:</b> Use /location to obtain a locid first. <br><b>Investigate:</b> Use after /anomalies or /breaking. Identifies a city of interest; provides per-day/week detail for drill-down. Combine groupby=DAY/FULL_DAY with a recent date range for 'recent days with departure from normal' queries. <br><b>Augment:</b> Provides the per-period anomaly series for prose ('temperatures were above normal for 12 of the past 14 days'). Returns: loc, ts, vals, N, vals_ts, baseline.