Precipitation anomaly (Chapel Hill 2 W, seven-day window)
Precipitation anomaly (Chapel Hill 2 W, seven-day window) is a source-faithful PIER20 calculation from NOAA/NCEI data. Scope: NOAA GHCN station Chapel Hill 2 W (GHCND:USC00311677), North Carolina. Each chart point covers the seven calendar days ending on that date; anomalies use 1991–2020 same-window normals. It follows the published eligibility, denominator, missing-value, revision and coverage rules in the Phase 1 computation contract.
- Latest
- 56.06
- 1Y change
- −10.70 mm
- vs median
- +64.24 mm
- Percentile
- 94th
- Best reading
- 240.13
| Series | First | Latest | Min | Max |
|---|---|---|---|---|
| PIER20 calculation: Precipitation anomaly (Chapel Hill 2 W, seven-day window) | 38.22 | 56.06 | -52.60 | 240.13 |
How this is calculated
current_cumulative_precipitation − normalcurrent_cumulative_precipitation − normal. Scope: NOAA GHCN station Chapel Hill 2 W (GHCND:USC00311677), North Carolina. Each chart point covers the seven calendar days ending on that date; anomalies use 1991–2020 same-window normals. Source: NOAA/NCEI. NOAA/NCEI does not endorse this analysis; recent observations may be preliminary. Source period, last checked, dataset vintage, units, revision status, coverage and formula version are recorded in the derived artifact.
As of 9 Aug 2026, the latest reading is 56.06 mm. That is down 10.70 mm over the past year and above its long-run median of -8.18 mm.
Frequently asked questions
3 answersWhat is the current precipitation anomaly (Chapel Hill 2 W, seven-day window)?
As of 9 Aug 2026, the latest reading is 56.06 mm. That is down 10.70 mm over the past year and above its long-run median of -8.18 mm.
How often is this benchmark updated?
This benchmark is built on daily data. The page is refreshed when the source publishes new observations; the freshness block below the chart shows the exact data-through date and when PIER20 last fetched the file.
What data sources does this chart use?
The chart is built from PIER20 calculation: Precipitation anomaly (Chapel Hill 2 W, seven-day window), sourced from NOAA/NCEI.