Apparent

<div>This map displays the Apparent and Expected Air Temperature forecast over the next 72 hours across the Contiguous United States, Alaska, Guam, Hawaii, and Puerto Rico in 3 hour increments. The original raster data has been processed into 1-degree contours.</div><div><br /></div><div>Two layers are included: apparent and expected temperature, both include a Time Series set to a 3-hour time interval. </div><div><br /></div><div>The apparent temperature is the perceived (or feels like) temperature derived from either a combination of
temperature and wind (wind chill) or temperature and humidity (heat index) for the indicated hour. When the temperature at a particular grid
point falls to 50 °F or less, wind chill will be used for that point for
the apparent temperature. When the temperature at a grid point rises
above 80 °F, the heat index will be used for apparent temperature.
Between 51 and 80 °F, the apparent temperature will be the ambient air
temperature.</div><div><br /></div><div>The expected temperature is the forecasted ambient air temperature in °F.</div><div><br /></div><div><span style='font-weight:bold;'>See sister data product for <a href='https://www.arcgis.com/home/item.html?id=0ae7cf18df0a4b4d9e7eea665f00500d' target='_blank' rel='nofollow ugc noopener noreferrer'>Min and Max Daily Temperatures</a></span></div><div><br /></div><div><font size='5'>Revisions</font></div><div><ul><li>Apr 21, 2022: Added Forecast Period Number 'Interval' field for an alternate query method to the Timeline of data. Disabled Time Series by default to improve initial Map Viewer exprience and added a Filter for 'interval = 1' to display initial forecast time data (current time period).</li><li>Apr 22, 2022: Set 'Apparent Temperature' layer visibility to True by default, so content is visible when initially viewed.</li><li>Sep  1, 2022: Updated renderer Arcade logic on layers to correctly
symbolize on values greater than 120 and less than -60 degrees.</li></ul><div><br /></div><div><font size='5'>Detail</font></div><div><font size='3'><span style='font-weight:bold;'><br /></span></font></div><div><font size='3'><span style='font-weight:bold;'>Service Data update interval is:</span> Hourly</font><br /></div></div><div><br /></div><span style='font-weight:bold;'><font size='3'>Where is the data coming from?</font></span><div><font size='3'><br /></font><a href='https://vlab.noaa.gov/web/mdl/ndfd' target='_blank' rel='nofollow ugc noopener noreferrer'>The National Digital Forecast Database (NDFD)</a> was designed to provide access to weather forecasts in digital form from a central location. The NDFD produces gridded forecasts of sensible weather elements. NDFD contains a seamless mosaic of digital forecasts from <a href='https://www.weather.gov/' target='_blank' rel='nofollow ugc noopener noreferrer'>National Weather Service (NWS)</a> field offices working in collaboration with the <a href='https://www.weather.gov/ncep/' target='_blank' rel='nofollow ugc noopener noreferrer'>National Centers for Environmental Prediction (NCEP)</a>. All of these organizations are under the administration of the <a href='https://www.noaa.gov/' target='_blank' rel='nofollow ugc noopener noreferrer'>National Oceanic and Atmospheric Administration (NOAA)</a>.<br /><br /><b>Apparent Temperature Source:</b></div><div><ul><li><span style='color:rgb(76, 76, 76);'>CONUS: </span><a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.conus/VP.001-003/ds.apt.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.conus/VP.001-003/ds.apt.bin</a></li><li>ALASKA: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.alaska/VP.001-003/ds.apt.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.alaska/VP.001-003/ds.apt.bin</a></li><li>HAWAII: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.hawaii/VP.001-003/ds.apt.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.hawaii/VP.001-003/ds.apt.bin</a></li><li>GUAM: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.guam/VP.001-003/ds.apt.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.guam/VP.001-003/ds.apt.bin</a></li><li>PUERTO RICO: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.puertori/VP.001-003/ds.apt.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.puertori/VP.001-003/ds.apt.bin</a></li></ul></div><div><b>Expected Temperature Source:</b></div><div><div><ul><li><span style='color:rgb(76, 76, 76);'>CONUS: </span><a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.conus/VP.001-003/ds.temp.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.conus/VP.001-003/ds.temp.bin</a></li><li>ALASKA: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.alaska/VP.001-003/ds.temp.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.alaska/VP.001-003/ds.temp.bin</a></li><li>HAWAII: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.hawaii/VP.001-003/ds.temp.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.hawaii/VP.001-003/ds.temp.bin</a></li><li>GUAM: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.guam/VP.001-003/ds.temp.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.guam/VP.001-003/ds.temp.bin</a></li><li>PUERTO RICO: <a href='https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.puertori/VP.001-003/ds.temp.bin' target='_blank' rel='nofollow ugc noopener noreferrer'>https://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.puertori/VP.001-003/ds.temp.bin</a></li></ul></div></div><div><span style='font-weight:bold;'><font size='3'>Where can I find other <a href='https://vlab.noaa.gov/web/mdl/ndfd-degrib-data-loc' target='_blank' rel='nofollow ugc noopener noreferrer'>NDFD</a> data?</font></span><br /><br />The Source data is downloaded and parsed using the <a href='https://www.esriurl.com/LiveFeed' target='_blank' rel='nofollow ugc noopener noreferrer'>Aggregated Live Feeds methodology</a> to return information that can be served through ArcGIS Server as a map service or used to update Hosted Feature Services in Online or Enterprise.<br /><br /><span style='font-weight:bold;'><font size='3'>What can you do with this layer?</font></span></div><div><div><br /></div><div>This feature service is suitable for data discovery and visualization. Identify features by clicking on the map to reveal the pre-configured pop-ups. View the time-enabled data using the time slider by Enabling Time Animation or add a Filter using the 'Forecast Period Number'.</div><div><br /></div><div><span style='color:rgb(128, 128, 128);'>This map is provided for informational purposes and is not monitored 24/7 for accuracy and currency.</span><div><br /></div>If you would like to be alerted to potential issues or simply see when this Service will update next, please visit our <a href='https://livingatlas.arcgis.com/livefeeds-status/' target='_blank' rel='nofollow ugc noopener noreferrer'>Live Feed Status</a> Page.</div></div>