Weather Records
This pillar focuses on record interpretation: what makes a record credible, what context is needed, and how to avoid comparing incomparable events across regions and time periods.
Record interpretation framework
- Verification: source authority, station metadata, and quality control checks.
- Context: single-day records versus multi-year distributions.
- Comparability: instrument changes, location moves, and urbanization effects.
- Decision use: when records are informative and when climatology is more relevant.
Define the claim before calling it a record
A record needs a variable, a geographic scope, an observation interval, and a comparison period. The highest daily maximum in a station's available archive is not automatically the highest temperature ever experienced in its city. A regional ranking may include stations with unequal record lengths. Start by writing the precise claim; then check whether the archive can support that scope rather than expanding a striking number into a broader headline.
Rainfall records particularly depend on duration. A calendar-day total, a rolling twenty-four-hour total, and a short-duration intensity are different measures. Temperature comparisons depend on exposure and instrument history. Suspect values deserve investigation, not automatic acceptance because they look exceptional. Conversely, an unusual observation is not necessarily wrong. Quality flags, neighbouring observations, and metadata provide context without replacing an official verification process.
Build a record-checking reading sequence
- Begin with temperature records explained to separate station extremes from wider record claims.
- Read rainfall records explained for accumulation windows and gauge limitations.
- Continue with interpreting weather rankings to examine coverage, ties, and unequal samples.
- Use the historical accuracy guide and extreme versus typical weather before applying a record to planning.
Where official verification belongs
The WMO World Weather and Climate Extremes Archive documents recognized categories and evaluated extremes. NOAA GHCN-Daily provides station records and quality context, not automatic certification of every local record claim. Consult the responsible national meteorological service for national or station-specific verification and revisions.
When sharing an archive maximum, include the station identifier, date, unit, available years, and status of quality checks. Say “highest in the retrieved series” when that is all the evidence establishes. A short archive can miss earlier extremes, and a long archive can still contain gaps. An observed maximum is also not an engineering design limit or a guarantee that future conditions cannot exceed it. Risk planning needs appropriate standards and a distribution of conditions, not only the most dramatic entry.