Example of an NDFD 24 Hourly Summarization Forecast Product. This is an example TimeSeriesML1.2 NDFD Time Series of 6 elements disseminated thru the NDFD Web Service. Requests for NDFD data are sent back in XML documents encoded in the Open Geospatial Consortium's International Standard of TSML (TimeSeries Markup Language). This particular product returns coverages for the following meteorological forecast observations that have been summarized across 24 hourly forecast periods. The elements are: Maxiumum Temperature, Minimum Temperature, 12 Hourly Probability of Precipitation, Weather, Weather Conditions Icons, and Watches-Warnings-and-Advisories (Long Duration Hazards). The elements are derived in real time from other NDFD elements, and are summarized over recurring 24 hour forecast periods that span 6AM to 6PM, 6PM to 6AM, etc, in local time. 38.99,-77.01 2026-08-18T06:00:00-04:00 2026-08-26T06:00:00-04:00 2026-08-18T17:15:28Z NDFD Central Server System 2026-08-18T06:00:00-04:00 2026-08-26T06:00:00-04:00 2026-08-18T17:15:28Z Denotes the observational domain or proximate feature-of-interest. This feature-of-interest is a simulation of the state of the atmosphere at the specific Latitude/Longitude Point Location. The observable properties are the meteorological elements requested. 38.99 -77.01 2026-08-18T06:00:00-04:00 2026-08-19T06:00:00-04:00 2026-08-19T06:00:00-04:00 2026-08-20T06:00:00-04:00 2026-08-20T06:00:00-04:00 2026-08-21T06:00:00-04:00 2026-08-21T06:00:00-04:00 2026-08-22T06:00:00-04:00 2026-08-22T06:00:00-04:00 2026-08-23T06:00:00-04:00 2026-08-23T06:00:00-04:00 2026-08-24T06:00:00-04:00 2026-08-24T06:00:00-04:00 2026-08-25T06:00:00-04:00 2026-08-25T06:00:00-04:00 2026-08-26T06:00:00-04:00 86 89 86 84 82 84 84 nil https://vlab.noaa.gov/web/mdl/ndfd National Digital Forecast Database Daily Maximum Temperature 2026-08-18T06:00:00-04:00 2026-08-26T06:00:00-04:00 PT24H 68 73 69 69 68 66 nil nil https://vlab.noaa.gov/web/mdl/ndfd National Digital Forecast Database Daily Minimum Temperature PT24H 2026-08-18T06:00:00-04:00 2026-08-18T18:00:00-04:00 2026-08-18T18:00:00-04:00 2026-08-19T06:00:00-04:00 2026-08-19T06:00:00-04:00 2026-08-19T18:00:00-04:00 2026-08-19T18:00:00-04:00 2026-08-20T06:00:00-04:00 2026-08-20T06:00:00-04:00 2026-08-20T18:00:00-04:00 2026-08-20T18:00:00-04:00 2026-08-21T06:00:00-04:00 2026-08-21T06:00:00-04:00 2026-08-21T18:00:00-04:00 2026-08-21T18:00:00-04:00 2026-08-22T06:00:00-04:00 2026-08-22T06:00:00-04:00 2026-08-22T18:00:00-04:00 2026-08-22T18:00:00-04:00 2026-08-23T06:00:00-04:00 2026-08-23T06:00:00-04:00 2026-08-23T18:00:00-04:00 2026-08-23T18:00:00-04:00 2026-08-24T06:00:00-04:00 2026-08-24T06:00:00-04:00 2026-08-24T18:00:00-04:00 2026-08-24T18:00:00-04:00 2026-08-25T06:00:00-04:00 2026-08-25T06:00:00-04:00 2026-08-25T18:00:00-04:00 2026-08-25T18:00:00-04:00 2026-08-26T06:00:00-04:00 9 1 2 17 63 56 40 53 59 51 28 14 3 nil nil nil https://vlab.noaa.gov/web/mdl/ndfd National Digital Forecast Database 12 Hourly Probability of 0.01 inch of Precipitation 2026-08-18T06:00:00-04:00 2026-08-26T06:00:00-04:00 PT12H Becoming_Sunny Slight_Chance_Thunderstorms Rain_Showers_Likely Chance_Thunderstorms Rain_Showers_Likely Chance_Rain_Showers Mostly_Sunny nil none Slight_Chance Likely Chance Likely Chance none nil none Thunderstorm Rain_Showers Thunderstorm Rain_Showers Rain_Showers none nil none none Light none Light Light none nil none none none none none none none nil none and and and and and none nil none Slight_Chance Slight_Chance Chance Slight_Chance Slight_Chance none nil none Rain_Showers Thunderstorm Rain_Showers Thunderstorm Thunderstorm none nil none Light none Light none none none nil none none none none none none none nil https://vlab.noaa.gov/web/mdl/ndfd National Digital Forecast Database Weather PT24H http://forecast.weather.gov/images/wtf/bkn.jpg http://forecast.weather.gov/images/wtf/scttsra20.jpg http://forecast.weather.gov/images/wtf/hi_shwrs60.jpg http://forecast.weather.gov/images/wtf/tsra50.jpg http://forecast.weather.gov/images/wtf/hi_shwrs60.jpg http://forecast.weather.gov/images/wtf/shra30.jpg http://forecast.weather.gov/images/wtf/few.jpg nil https://vlab.noaa.gov/web/mdl/ndfd Weather Conditions Icon PT24H 2026-08-18T06:00:00-04:00 2026-08-26T06:00:00-04:00 nil https://vlab.noaa.gov/web/mdl/ndfd National Digital Forecast Database Watches, Warnings, and Advisories 2026-08-18T06:00:00-04:00 2026-08-26T06:00:00-04:00 P8D