Anomalies & MTD: Deviation from Long-Term (30-Year) Averages
This section shows how observed values deviate from the 30-year normals (long-term averages). The map graphics show deviations (commonly called anomalies) of average min/max/mean temperature or total precipitation from the average/total represented by the 30-year normals (1991-2020). Map graphics are available for multiple periods.
The calculations use as many station networks and data sources as possible (AN monthly series), not just those that have existed for long periods of time. See the PRISM datasets document for more information.
Variable:
Comparison Type:
(Available for ppt and tmean only)
Quarter:
