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Republishing an NWS Forecast on a Station Site

Attribution, fetch lag, and format breakage when a personal weather site copies official NWS forecast text. Provenance rules for station publishers.

Back to Historical weather observations and forecasts

When a personal weather site prints National Weather Service forecast text, it is republishing an official product. The station did not issue the forecast. The copy is only as honest as its attribution, its clocks, and its formatting. A recovered page that concatenates labels, mixes navigation chrome into the body, and leaves yesterday’s periods on screen is a provenance failure, not a second NWS office.

The historical URL /weather-forecast.php held a Greater Phoenix metro forecast extract on the original weather-station site. A dated issuance line on that copy read 26 April 2005, 03:02 MST, for zone AZZ023. That line is a historical citation. It is not current Phoenix weather, and the period-by-period wording is not reprinted here as if it were in force. For forecasts that are in force, use weather.gov.

Historical context

Station packages (Weather Display and similar) offered forecast modules that pulled NWS zone or point text and poured it into a template. The recovered /weather-forecast.php page showed that pattern: period tiles, a PoP legend, then a block of official-style narrative, wrapped in the site’s own navigation. Another forecast URL on this host carried the operator sentence “Data is okay, format is messed up.” That sentence is the subject of this article. The meteorology can be intact in the source while the copy is unusable.

In 2005, AZZ023 was the Greater Phoenix Area public zone in the NWS Phoenix county warning area. NWS Phoenix replaced that zoning on 4 April 2017. A republished page that still names AZZ023 is an archive of an old geographic unit. Current zone lists are on the NWS Phoenix zone page.

TNET is not the National Weather Service. A legacy article must not be used as a warning service. Hazards belong on weather.gov and with local emergency authorities.

What “republish” means

Republishing is a copy with a new publisher. The scientific object is still an NWS forecast: expected conditions for a place and a valid interval, issued by a Weather Forecast Office. The station site adds a second publisher, a fetch time, and a presentation layer. Those additions are metadata. They are not weather.

Three claims become false the moment the text leaves weather.gov:

  1. That the station “has a forecast” as if it were an office.
  2. That the copy is current because the station’s observation block is current.
  3. That broken formatting is a local improvement.

NWS public data are intended to be reusable. The NWS API states that the information is open and free to use. Reuse still requires that forecasts, observations, and alerts remain separate resources. A PHP page that pastes zone text under a “live” heading violates that separation even when the words were copied accurately.

Attribution

A defensible republish names the source in the same view as the text.

Issuer. National Weather Service, and the office (here, Phoenix). The office still matters.

Product. Zone forecast, point forecast, hourly, or discussion. Product class tells the reader what geography and what detail to expect.

Place. Zone ID and name, or the point the product claims. “4 miles west of Mesa” is not the same as “Greater Phoenix Metro.”

Issuance time with timezone. The office’s issuance, not the web server’s clock.

Link to the live official product. The copy should send the reader out. It should not imply that the hobby URL is the archival source of record.

If any of those fields is missing, the page is an unlabeled extract. Unlabeled extracts get treated as observations. Even when the text may be copied, name the issuer and issuance time. Do not restyle watches into badges; link the official product.

Lag: three clocks on a copied forecast

Issuance is when NWS released the product. Instruction 10-503 has the ZFP generated at least twice daily and whenever the digital database changes. A copy fetched at noon can already be a cycle behind if the office updated at 11:40.

Retrieval is when the station script succeeded. Templates often printed “Formatted:” or “Page Access” times from the CMS. Those are not issuance times. The recovered 2005 page showed a formatted stamp on 25 April and an issued stamp on 26 April. Even inside one snapshot, the clocks disagreed. A reader who trusts the footer is reading the wrong clock.

Display is when a browser paints the HTML. Caching or a stalled fetch can freeze last week’s periods beside gauges that are still updating.

Lag is a property of republishing. The honest label is: NWS issued at T1; this site retrieved at T2; first period valid through T3. If the fetch failed, show a failure, not the last good copy dressed as current. Stale forecast text remains a forecast. It does not become an observation by sitting on a station domain.

Format breakage

The recovered pages show the usual breakage modes.

Concatenated tokens. “PartlyCloudy,” “WednesdayNight,” missing spaces in “ForecastFor.” Parsers and humans miss period boundaries.

Chrome in the body. Repeated navigation before and after the product. Search engines treat the chrome as content.

Icon tables without the narrative. Period tiles with a high, a low, and a PoP, stripped of wind, timing, and hazard language.

Empty structure and wrapping. Repeated separators after a PoP legend, or discarded line breaks that merge two periods into one paragraph.

Format breakage is how a correct source becomes a false local product. The operator note that the format was messed up was a diagnosis. The fix is to restore source fields or replace the scrape with a link.

Provenance checklist for a station publisher

  1. Store issuer, product ID, place, issuance time, and retrieval time as fields, not as leftover footer text.
  2. Keep forecast HTML in a container titled as a forecast. Keep the logger in a container titled as an observation. See forecast versus observation.
  3. If the official text cannot be parsed, display a fetch error and a link to weather.gov. Do not display a partial icon row.
  4. Expire the copy when the first period has ended or when a newer issuance is known. An expired copy is historical.
  5. Do not mix a local model or a station trend into the NWS block without a new heading. That mixing is a composite, and it needs extra labels.
  6. Do not paraphrase a watch or warning into a severity color. Link the official headline.
  7. If you quote a historical issuance, keep the date. The 26 April 2005 AZZ023 extract on this URL is an example of a dated citation. It is not a template for “today.”

Practical reading for visitors

If you land on an old station forecast URL, look for an issuance timestamp and an office name. If they are absent, do not use the numbers. Ignore concatenated tiles until you can map them to named periods. Open NWS Phoenix or weather.gov for the product in force. Treat any remaining text as historical guidance for the date on the page, if a date exists.

The NWS Phoenix metro forecast as a product article explains zone geography and issuance cycle. Advanced forecast pages cover the discussion and matrix products that sit behind the tiles.

Modern relevance

Apps still cache NWS period forecasts. The failure mode is the same: a pretty row, no issuance, no office, no link. Provenance is the difference between a republish and a counterfeit office.

TNET’s public explanation of how observed, modelled, and derived information are distinguished is how the service works. That methodology is for a connection-intelligence product. It is not a license to treat a 2005 zone copy as live weather, and it is not a speed promise. Official forecasts remain on weather.gov. Related historical pages are listed under historical observations.

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