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Home > XML > XML Change Notices
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NOAA's National Weather Service offers several XML services
|Forecasts||Watch/warnings||Current Observations||Tropical Cyclone Advisories||Storm Prediction Center Forecast Products||Change Notices|
Recent National Weather Service XML service change notices are listed below.
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XML Alerts: Seeking comments on experimental CAP 1.1 messages
NWS is accepting comments through December 1, 2008 on experiemental enhanced feeds of NWS watch/warning and advisories in the CAP 1.1 format. These feeds feature more detailed pre-parsing of NWS products than previously available and also feature ATOM based index feeds. It is expected these feeds will replace the current feeds over the next 18 months.
Details...
Current Obs XML: ZIP file collections of all observations available
Complete collections of the RSS and XML current observation files are now available. These files contain all current files of the two types for those who wish to download all files at once. These are updated hourly, normally about 10 minutes past the hour.
Details...
Current Obs XML: Marine and Surf obervations elements added to schema
Effective April 16, 2008, the schema for the current observation feeds has been updated for to include marine and surf related items
The updated XSD introduces 19 parameters related to marine and surf observations. These parameters will be included in XML observations when the data for each is available. The new parameters are:
water temperature: water_temp_f (fahrenheit) and water_temp_c (celsius),
wind and wind gusts (knots): wind_kt and wind_gust_kt,
pressure tendency: pressure_tendency_mb (millibars) and pressure_tendency_in (inches of mercury),
wave height: wave_height_m (meters) and wave_height_ft (feet),
wave periods (seconds), dominant and average: dominant_period_sec and average_period_sec,
mean wave direction: mean_wave_dir (16 point compass) and mean_wave_degrees (360 degrees),
tide information (reported by some buoys): tide_ft (feet),
wave steepness (ratio of wave height to wave length): steepness,
water column height (reported by DART buoys): water_column_height (meters),
surf height: surf_height_ft (feet),
swell: swell_dir (16 point compass), swell_degrees (360 degrees) and swell_period (seconds)
Details...
NDFD XML: National Digital Forecast Database Now Disseminates Real-time Mesoscale Analysis Data
Effective January 15, 2008, the National Digital Forecast Database (NDFD) Simple Object Access Protocol (SOAP) and
Web Feature Service (WFS) began disseminating Real-time Mesoscale Analysis (RTMA) data. SOAP and WFS users can
find out more information about the six new RTMA elements at http://www.weather.gov/os/notification/tin06-24rtma_grids.txt.
Additional information on how to access the new data through the SOAP service and WFS can be found at
http://www.weather.gov/forecasts/xml/ and http://www.weather.gov/forecasts/xml/OGC_services/.
Details...
NDFD XML: National Weather Service Extends Comment Period for Experimental Web Feature Service
Effective November 23, 2007, NWS has extended the comment period for the experimental web feature servic
e (WFS) access to the National Digital Forecast Database through April 30, 2008. The WFS will remain experimental through the comment period. After the comment period closes, on April 30, 2008, all feedback will be assessed and a technical analysis will be completed. Upon completion of those tasks, the NWS will determine whether to transsition this service to operational status, discontinue it or revise and retain it as experimental.
Details...
NDFD XML: SOAP Service Oct 18 Upgrades Delayed until Monday Oct 22
Service enhancements scheduled for Oct 18th, have been delayed until Monday Oct 22. Technical problems prevented the deployment on Thursday the 18th. Unless there is an emergency policy is to not to deploy new operational code on Fridays.
Details...
NDFD XML: SOAP Service experincing technical problems 9/21
The file server supporting the NDFD SOAP service experienced technical problems the morning of 9/21. Service was restored about 11:20am eastern.
Details...
NDFD XML: SOAP Service experincing technical problems 9/21
The file server supporting the NDFD SOAP service has experienced some technical problems the mroning of 9/21. The service is expected to be restored about 11am Eastern.
Details...
NDFD XML: SOAP Service Will Support Multiple Point Requests Beginning October 18, 2007
Effective October 18, 2007 at 1400 Coordinated Universal Time (UTC), the NWS will begin
supporting NDFD SOAP web service requests containing multiple locations. For more
information on the new functionality please see
http://www.weather.gov/os/notification/tin07-63_ndfd_enhancement.txt. The improved
service also helps user identify which points to submit as input by allowing the user
to locate NDFD points within a rectangle, on a line, or for one or more zip codes.
Details...
NDFD XML: Period Time and Name Fixes
The NDFD SOAP service period times were corrected so that the start-valid-time tag picks up where the previous end-valid-time
tag left off. Prior to this fix, there was a one hour difference between start and end times. The release also handles the
case where there is old data from the provious night still in the database. The period name will now read
"Last Night". The period name for overnight data being requested after midnight, but before 6 AM, will now read
"Early This Morning".
Details...
NDFD XML: SOAP Service Upgrades to degrib Formatted DWML
The NDFD-XML service will migrate to a new backend application (degrib) to format its DWML encoded NDFD data. The SOAP service user experience
should remain unchanged due to this code upgrade. To ensure a smooth transition to the new formatter, we have deployed
a parallel version of the SOAP service on the National Weather Service website that uses the new formatter. We invite you to try the new version
of the service at http://www.weather.gov/mdl/XML/Ccode_test/SOAP_server/ndfdXMLserver.php?. If you do experiment with the new service, please
let us know. You can provide this information, along with any issues you encounter with the new service, at http://www.weather.gov/feedback.php.
Details...
NDFD XML: National Weather Service Offers Experimental Web Feature Service
Effective Friday May 18, 2007, the National Weather Service will begin providing experimental Web Feature Service (WFS) access to the National Digital Forecaset
Database (NDFD). The NDFD WFS server will provide standards-based access to the NDFD using Open Geospatial Consortium specifications for sharing data. The WFS allows a specification-compliant client application to request feature data from
the NDFD WFS server. Once the data are received, the client can display the NDFD
data and merge it with other data sources within a geographical information system. For more information on the experimental NDFD wFS, explore the service home page at http://www.weather.gov/forecasts/xml/OGC_services/ . Details...
NDFD XML: Web/SOAP service back online
The NDFD-XML service was migrated to new hardware yesterday and has been running without any problems since yesterday afternoon. We will continue to monitor the situation as required. Thank you for your patience.
Details...
NDFD XML: Web/SOAP service temporarily offline
The NDFD-XML service continues to be offline (although it has been up and down for short periods of time). We hope to try a technical fix later today (Tuesday, 9 May). Thank you for your patience.
Details...
NDFD XML: Web/SOAP service temporarily offline
The NDFD-XML service is again offline, May 4, 2007, 10pm eastern, while we investigate extreme loading issues. We are exploring a number short term (this week), mid term (next week) and long term (a couple of months) approaches. Thank you for your understanding. If you are a user who needs to make large numbers of calls to the service, we HIGHLY recommend you explore using the Degrib process as described in the link above. With degrib, you download the binary forecast data to your local machine, then use a C program to query the data and return the NDFD-XML format. While we strive to improve and increase the capacity of the public web service, it is very difficult for us to support users who have a requirement to query large numbers of points in a short period of time.
Details...
NDFD XML: Web/SOAP service online (for now)
The NDFD XML SOAP service is up, starting at 5:30 am eastern, Thurssday, May 3, 2007 and will remain online for as long as possible, until capacity is reached. Short term solutions continue to be worked on.a
Details...
NDFD XML: Web/SOAP service temporarily offline
The NDFD-XML service is again offline, afternoon, May 2, 2007, while we investigate extreme loading issues. We are exploring a number short term (this week), mid term (next week) and long term (a couple of months) approaches. Thank you for understanding.
Details...
NDFD XML: Web/SOAP service online
The NDFD XML SOAP service was restore about 5:30 am eastern, Wednesday, May 2, 2007.
Details...
NDFD XML: Web/SOAP service temporarily offline
Starting about 2:30 eastern, Tuesday, May 1, 2007, the SOAP service experinced a sudden, rapid increase in number of requests in the range of several hundred requests per seconds. This has overwhelmed the servers, and the service has been temporarly disable while we attempt to locate the source. If you are a recent heavy user of the service or need to make a massive amount of requests, please follow the link provided in this message to learn about downloading the raw forecast data and using the degrib tool to generate the xml data locally.
Details...
NDFD XML: Web/SOAP service online
The NDFD XML SOAP service was restore about 3:0opm eastern, Friday, April 20, 2007.
Details...
NDFD XML: Web/SOAP service temporarily offline
Starting about 1:30 eastern, Friday, April 20, 2007, the SOAP service experinced a sudden, rapid increase in number of requests in the range of several hundred requests per seconds. This has overwhelmed the servers, and the service has been temporarly disable while we attempt to locate the source. If you are a recent heavy user of the service or need to make a massive amount of requests, please follow the link provided in this message to learn about downloading the raw forecast data and using the degrib tool to generate the xml data locally.
Details...
NDFD XML: Added Support for 9 Experimental Convective Outlook Hazard Probability Elements
Effective February 27, 2007, the NDFD-XML service has been upgraded to provide access to
9 new experimental Convective Outlook Hazard Probability elements. These elements include
a Convective Hazard Outlook, Probability of Tornadoes, Probability of Hail, Probability of
Damaging Thunderstorm Winds, Probability of Extreme Tornadoes, Probability of Extreme Hail
Probability of Extreme Thunderstorm Winds, Total Probability of Severe Thunderstorms, and
Probability of Extreme Severe Thunderstorms. For more information on accessing these new
elements, please visit the web service web page at http://www.weather.gov/forecasts/xml/.
For additional information on the new elements please consult the list of experimental
products at http://products.weather.gov/viewliste.php.
Details...
Current Observations XML: Addition of ALT tag in CDATA field
On October 31, 2006, an ALT tag atribute was added to the CDATA field for the current weather icon image. This is to provide information for text screen readers.
Details...
Current Observations XML: Upgrade to operational status effective December 4, 2006
Effective December 4, 2006, the Current Observation XML service will be upgraded to operational status.
Details...
NDFD XML: Upgrade to operational status effective December 4, 2006
Effective December 4, 2006, the NDFD-XML service will be upgraded to operational status.
Details...
NDFD XML: NWS NDFD Technical Workshop Announcement
This message is intended to announce the "NWS NDFD Technical Workshop" on
November 2, 2006 in Silver Spring MD. The workshop will be held in the
NOAA complex in building SSMC4 Room 1W611. The workshop will including informaiton and presentions regarding
the NDFD XML SOAP service. Please register early
(Registration deadline is October 27, 2006).
Details...
NDFD XML: Wind Gust Added to NDFD and Access to Alaska Data
On September 6, 2006, the National Weather Service deployed an update to its National Digital
Forecast Database Web Service. The new software adds wind gust to the list of supported experiemental
elements. The NDFD web service will now return forecasts of wind gust when the parameter
wgust is requested. Additionally, web service users can now access the following experimental Alaska
elements:
MAXIMUM TEMPERATURE,
WIND DIRECTION,
MINIMUM TEMPERATURE,
WIND SPEED,
12-HOUR PROBABILITY OF PRECIPITATION,
WAVE HEIGHT,
Details...
NDFD XML: Minor Bug Fixes to SOAP Service
On July 24, 2006, the National Weather Service deployed an update to its National Digital
Forecast Database Web Service. The new software corrected a bug that erroneously formatted
weather icon names with a zero probability of precipitation (PoP) value (i.e. scttsra0.jpg).
Since there are no image files with these names, users were unable to display them. The
new software now correctly formats the icon with no PoP value when the PoP value is zero.
This release also fixed a bug in the formatting of the start-valid-time and end-valid-time
elements. When the data didn't span the later periods of the DWMLgenByDay product an extra hour
was incorrectly added to the date and time string. The update corrected that problem.
Details...
NDFD XML: Web Service Now Provides Tropical Cyclone Probabilistic Wind Forecast
On July 5, 2006, the National Weather Service will begin providing tropical cyclone
probabilistic wind speed forecast elements in the National Digital Forecast Database
on an experimental basis. The test will continue through November 30, 2006. Users
can access these data through the NDFD web service. Tropical cyclone surface wind
speed probabilities will be available though 120 hours at 6 hourly intervals. These
forecasts will be available for three wind speed thresholds: 34, 50, and 64 knots.
Two types of wind speed probabilities, cumulative and incremental, will be available.
Definitions of these probabilities are available from the National Hurricane Center
website at http://www.nhc.noaa.gov/aboutnhcprobs.shtml. More information on how to
use the web service to access these data can be found at http://www.weather.gov/xml/.
These data are only available using the DWMLgen interface and the time-series product.
Details...
NDFD XML: Icons will include a probability of precipitation value
On June 26, 2006, the National Weather Service National Digital Forecast Database SOAP service will begin
formatting Digital Weather Markup Language weather condition icons containing image file names that include
a probability value. The associated icon contains the probability of precipitation in the lower right hand
corner of the image. A file name containing a probability of precipitation value is only formatted for those
icons for which there is an associated probability value. For example, if there was a 40 percent chance of
rain, then the icon file name will now be formatted as ra40.jpg. An example of a weather type with no
associated probability of precipitation is fog. Its icon file name will not change and continues to be fg.jpg.
Details...
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