Extreme-heat days (Chapel Hill 2 W, seven-day window)
Extreme-heat days (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
- 6.00
- 1Y change
- +6.00 days
- vs median
- +6.00 days
- Percentile
- 87th
- Best reading
- 7.00
| Series | First | Latest | Min | Max |
|---|---|---|---|---|
| PIER20 calculation: Extreme-heat days (Chapel Hill 2 W, seven-day window) | 0.00 | 6.00 | 0.00 | 7.00 |
A count above threshold is not a yield-loss claim.
How this is calculated
count(TMAX > 30°C)count(TMAX > 30°C). 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 6.00 days. That is above its long-run median of 0.00 days.
Source series
NOAA/NCEIFrequently asked questions
3 answersWhat is the current extreme-heat days (Chapel Hill 2 W, seven-day window)?
As of 9 Aug 2026, the latest reading is 6.00 days. That is above its long-run median of 0.00 days.
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: Extreme-heat days (Chapel Hill 2 W, seven-day window), sourced from NOAA/NCEI.