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Notices and Advisories

NWS/TOC and NCEP/AWC Notices

Advisories

Technical Implementation Notices



WIFS Advisories

13 June 2014

REMOVAL OF TRIAL FORECAST FOLDERS EFFECTIVE 15 JULY 2014

On Tuesday, July 15, 2014, the /wifs/data/GRIB2/KWBC/trial_forecasts folder will be removed. The Clear Air Turbulence, In-Cloud Turbulence, Cumulonimbus, and Icing data can be found in /wifs/data/GRIB2/KWBC/cat, /wifs/data/GRIB2/KWBC/incldturb, /wifs/data/GRIB2/KWBC/cb, and /wifs/data/GRIB2/KWBC/ice, respectively.

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


28 October 2013

WAFS GRIB2 DATA FOR FL410 AVAILABLE 13 NOVEMBER 2013

Beginning November 13, 2013, FL410 (175 mb) data will be available as an additional level in the WAFS GRIB2 files under the folder GRIB2/KWBC/. Height, temperature, and U/V wind components will be available. The individual bulletins will be identifiable by the following WMO headers inside the concatenated files:

 YHXC18 KWBC - Height, 6 hr forecast
 YHXD18 KWBC - Height, 9 hr forecast
 YHXE18 KWBC - Height, 12 hr forecast
 YHXF18 KWBC - Height, 15 hr forecast
 YHXG18 KWBC - Height, 18 hr forecast
 YHXH18 KWBC - Height, 21 hr forecast
 YHXI18 KWBC - Height, 24 hr forecast
 YHXJ18 KWBC - Height, 27 hr forecast
 YHXK18 KWBC - Height, 30 hr forecast
 YHXL18 KWBC - Height, 33 hr forecast
 YHXM18 KWBC - Height, 36 hr forecast

 YTXC18 KWBC - Temperature, 6 hr forecast
 YTXD18 KWBC - Temperature, 9 hr forecast
 YTXE18 KWBC - Temperature, 12 hr forecast
 YTXF18 KWBC - Temperature, 15 hr forecast
 YTXG18 KWBC - Temperature, 18 hr forecast
 YTXH18 KWBC - Temperature, 21 hr forecast
 YTXI18 KWBC - Temperature, 24 hr forecast
 YTXJ18 KWBC - Temperature, 27 hr forecast
 YTXK18 KWBC - Temperature, 30 hr forecast
 YTXL18 KWBC - Temperature, 33 hr forecast
 YTXM18 KWBC - Temperature, 36 hr forecast

 YUXC18 KWBC - U-Wind, 6 hr forecast
 YUXD18 KWBC - U-Wind, 9 hr forecast
 YUXE18 KWBC - U-Wind, 12 hr forecast
 YUXF18 KWBC - U-Wind, 15 hr forecast
 YUXG18 KWBC - U-Wind, 18 hr forecast
 YUXH18 KWBC - U-Wind, 21 hr forecast
 YUXI18 KWBC - U-Wind, 24 hr forecast
 YUXJ18 KWBC - U-Wind, 27 hr forecast
 YUXK18 KWBC - U-Wind, 30 hr forecast
 YUXL18 KWBC - U-Wind, 33 hr forecast
 YUXM18 KWBC - U-Wind, 36 hr forecast

 YVXC18 KWBC - V-Wind, 6 hr forecast
 YVXD18 KWBC - V-Wind, 9 hr forecast
 YVXE18 KWBC - V-Wind, 12 hr forecast
 YVXF18 KWBC - V-Wind, 15 hr forecast
 YVXG18 KWBC - V-Wind, 18 hr forecast
 YVXH18 KWBC - V-Wind, 21 hr forecast
 YVXI18 KWBC - V-Wind, 24 hr forecast
 YVXJ18 KWBC - V-Wind, 27 hr forecast
 YVXK18 KWBC - V-Wind, 30 hr forecast
 YVXL18 KWBC - V-Wind, 33 hr forecast
 YVXM18 KWBC - V-Wind, 36 hr forecast

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


28 October 2013

NOTIFICATION OF WIFS GRIB2 FOLDER CHANGES EFFECTIVE 13 NOVEMBER 2013

Effective 1800 UTC Wednesday, November 13, 2013, the Clear Air Turbulence (cat), In-Cloud Turbulence (incldturb), Cumulonimbus (cb), and Icing (ice) folders currently located under GRIB2/KWBC/trial_forecasts/ will be moved to the GRIB2/KWBC/ folder. Also the Clear Air Turbulence (CAT), In-Cloud Turbulence (INCLDTURB), Cumulonimbus (CB), and Icing (ICE) folders currently located under GRIB2/EGRR/TRIAL_FORECASTS/ will be moved to the GRIB2/EGRR/ folder. To give users adequate time to adjust to these changes, the files will be duplicated in both the new and old locations until 1800 UTC, May 13, 2014, at which time the GRIB2/KWBC/trial_forecasts/ and GRIB2/EGRR/TRIAL_FORECASTS/ folders will be removed. Between 1800 UTC on November 13, 2013, and 1800 UTC on May 13, 2014, the GRIB2 folder structure will look like the following:

 |-- GRIB2
     |-- EGRR
         |-- T+06
         |-- T+09
         |-- T+12
         |-- T+15
         |-- T+18
         |-- T+21
         |-- T+24
         |-- T+27
         |-- T+30
         |-- T+33
         |-- T+36
         |-- CAT
             |-- T+06
             |-- T+09
             |-- T+12
             |-- T+15
             |-- T+18
             |-- T+21
             |-- T+24
             |-- T+27
             |-- T+30
             |-- T+33
             |-- T+36
         |-- CB
             |-- T+06
             |-- T+09
             |-- T+12
             |-- T+15
             |-- T+18
             |-- T+21
             |-- T+24
             |-- T+27
             |-- T+30
             |-- T+33
             |-- T+36
         |-- ICE
             |-- T+06
             |-- T+09
             |-- T+12
             |-- T+15
             |-- T+18
             |-- T+21
             |-- T+24
             |-- T+27
             |-- T+30
             |-- T+33
             |-- T+36
         |-- INCLDTURB
             |-- T+06
             |-- T+09
             |-- T+12
             |-- T+15
             |-- T+18
             |-- T+21
             |-- T+24
             |-- T+27
             |-- T+30
             |-- T+33
             |-- T+36
         |-- TRIAL_FORECASTS
             |-- CAT
                 |-- T+06
                 |-- T+09
                 |-- T+12
                 |-- T+15
                 |-- T+18
                 |-- T+21
                 |-- T+24
                 |-- T+27
                 |-- T+30
                 |-- T+33
                 |-- T+36
             |-- CB
                 |-- T+06
                 |-- T+09
                 |-- T+12
                 |-- T+15
                 |-- T+18
                 |-- T+21
                 |-- T+24
                 |-- T+27
                 |-- T+30
                 |-- T+33
                 |-- T+36
             |-- ICE
                 |-- T+06
                 |-- T+09
                 |-- T+12
                 |-- T+15
                 |-- T+18
                 |-- T+21
                 |-- T+24
                 |-- T+27
                 |-- T+30
                 |-- T+33
                 |-- T+36
             |-- INCLDTURB
                 |-- T+06
                 |-- T+09
                 |-- T+12
                 |-- T+15
                 |-- T+18
                 |-- T+21
                 |-- T+24
                 |-- T+27
                 |-- T+30
                 |-- T+33
                 |-- T+36
     |-- KWBC
         |-- cat
         |-- cb
         |-- ice
         |-- incldturb
         |-- trial_forecasts
             |-- cat
             |-- cb
             |-- ice
             |-- incldturb
To avoid service interruptions please adjust your software as soon after November 13, 2013, as possible.

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


14 October 2013

REMINDER OF CESSATION OF WAFS UPPER AIR FORECASTS IN GRIB1 FORMAT ON 13 NOVEMBER 2013

Effective 1800 UTC Wednesday, November 13, 2013, the NWS will cease providing WAFS Global Gridded Forecasts in GRIB1 format on WIFS. At that time only GRIB2 will be available. WIFS users are urged to update their software to use GRIB2 data as soon as possible to avoid service interruptions. More details are available in NWS Service Change Notice 13-25.

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


09 July 2013

WAFC BACKUP TEST TO DELAY SIGNIFICANT WEATHER (PNG AND BUFR) PRODUCTS

On Wednesday, July 10, 2013, WAFC London will conduct a quarterly backup test of WAFC Washington for the 06 UTC package (valid Thursday July 11th 06 UTC). The products will not be issued at the usual time (1245-1300 UTC). WAFC London will issue all PNG and BUFR products 2 hours late (1445-1500 UTC).

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


23 April 2013

WAFC BACKUP TEST TO DELAY SIGNIFICANT WEATHER PRODUCTS

On Wednesday, April 24, 2013, WAFC Washington will conduct a quarterly backup test of WAFC London for the 12 UTC package (valid Thursday April 25th 12 UTC). The products will not be issued at the usual time (1845-1900 UTC). WAFC Washington will issue all PNG and BUFR products 2 hours late (2045-2100 UTC).

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


11 April 2013

CESSATION OF WAFS UPPER AIR FORECASTS IN GRIB1 FORMAT ON 13 NOVEMBER 2013

Effective 1800 UTC Wednesday, November 13, 2013, the NWS will cease providing WAFS Global Gridded Forecasts in GRIB1 format. At that time only GRIB2 will be available. WIFS users are urged to migrate their software to use GRIB2 data as soon as possible to avoid service interruptions. More details are available in NWS Service Change Notice 13-25.

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


9 April 2013

WAFC BACKUP TEST TO DELAY SIGNIFICANT WEATHER PRODUCTS

On Wednesday, April 10, 2013, WAFC London will conduct a quarterly backup test of WAFC Washington for the 06 UTC package (valid Thursday April 11th 06 UTC). The products will not be issued at the usual time (1245-1300 UTC). WAFC London will issue all PNG and BUFR products 2 hours late (1445-1500 UTC).

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.


27 March 2013

REGARDING WIFS CHANGES EFFECTIVE 30 APRIL 2013

Effective 1800 UTC on 30 April 2013, the following changes will be made to the WIFS directory structure.

1) The BUFR directory will no longer contain significant weather forecast products (JU.... KKCI/EGRR). The WAFC Washington SIGWX products are being stored under the BUFR/SIGWX/KWBC sub-directory and the WAFC London SIGWX products are being stored under the BUFR/SIGWX/EGRR sub-directory.

2) The PNG directory will no longer contain significant weather forecast products (JU.... KKCI/EGRR), tropical cyclone advisory graphics (PZXD), and volcanic ash advisory graphics (PFXD). These products are being stored in the SIGWX, TROP, and VOLC sub-directories under the PNG directory, respectively.

Users should change their software as soon as possible to begin retrieving the files from the new locations prior to April 30 to avoid an interruption in service.

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.



27 February 2013

WIFS FOLDER CHANGE MADE 26 FEBRUARY 2013 HAS BEEN REVERTED

The WIFS change made at 18 UTC on 26 February has been temporarily rolled back due to adverse impact on several customers. You will find the BUFR and PNG files in the same locations as they were prior to 18 UTC Feb 26. We will notify users via e-mail and administrative message (NOXX10 KKCI) when a new implementation data is established. Additionally another message will be posted on this Advisory board.

We sincerely apologize for any inconvenience this has caused WIFS users.

Details of roll-back... The BUFR directory will again contain significant weather forecast products (JU.... KKCI/EGRR). The WAFC Washington SIGWX products are also being stored under the BUFR/SIGWX/KWBC sub-directory and the WAFC London SIGWX products are also being stored under the BUFR/SIGWX/EGRR sub-directory. The PNG directory will again contain significant weather forecast products (JU.... KKCI/EGRR), tropical cyclone advisory graphics (PZXD), and volcanic ash advisory graphics (PFXD). These products are also being stored in the SIGWX/KWBC, SIGWX/EGRR, TROP, and VOLC sub-directories under the PNG directory, respectively.

At a time yet to be determined, these files will only be populated in the sub-directories BUFR/SIGWX/KWBC, BUFR/SIGWX/EGRR, PNG/SIGWX/KWBC, PNG/SIGWX/EGRR, PNG/TROP, and PNG/VOLC. Users should change their software accordingly to retrieve the files from the new locations to avoid an interruption in service.

If you have any questions please call the WIFS Help Desk at +1(877) 280-2811 or send email to wifs.admin@noaa.gov.


28 January 2013

REGARDING WIFS CHANGES EFFECTIVE 26 FEBRUARY 2013

Effective 1800 UTC on 26 February 2013, the following changes will be made to the WIFS directory structure.

1) The BUFR directory will no longer contain significant weather forecast products (JU.... KKCI/EGRR). The WAFC Washington SIGWX products are being stored under the BUFR/SIGWX/KWBC sub-directory and the WAFC London SIGWX products are being stored under the BUFR/SIGWX/EGRR sub-directory.

2) The PNG directory will no longer contain significant weather forecast products (JU.... KKCI/EGRR), tropical cyclone advisory graphics (PZXD), and volcanic ash advisory graphics (PFXD). These products are being stored in the SIGWX, TROP, and VOLC sub-directories under the PNG directory, respectively.

Users should change their software to retrieve the files from the new locations prior to February 26 to avoid an interruption in service.

If you have any questions please call the WIFS Help Desk at +1(877)280-2811 or send e-mail to wifs.admin@noaa.gov.



29 October 2012

REGARDING WIFS DIRECTORY CHANGES EFFECTIVE 28 NOVEMBER 2012

Effective 1500 UTC on 28 November 2012, the following changes will be made to the WIFS directory structure.

1) Sub-directory SIGWX will be added under the BUFR directory. The SIGWX directory will contain KWBC and EGRR sub-directories. The Significant Weather forecast products (JU.... KKCI) issued by WAFC Washington will be stored under the BUFR/SIGWX/KWBC directory. The Significant Weather forecast products issued by WAFC London (JU.... EGRR) will be stored under the BUFR/SIGWX/EGRR directory. For a period of not less than 60 days the files will be available under both the BUFR directory and the BUFR/SIGWX/EGRR and BUFR/SIGWX/KWBC directories in order to give users time to adjust their software.

2) Sub-directory SIGWX will be added under the PNG directory. The SIGWX directory will contain KWBC and EGRR sub-directories. The Significant Weather forecast products (PG.... KKCI) issued by WAFC Washington will be stored under the PNG/SIGWX/KWBC directory. The Significant Weather forecast products issued by WAFC London (PG.... EGRR) will be stored under the PNG/SIGWX/EGRR directory. For a period of not less than 60 days the files will be available under both the PNG directory and the PNG/SIGWX/EGRR and PNG/SIGWX/KWBC directories in order to give users time to adjust their software.

3) Sub-directory TROP will be added under the PNG directory. The TROP directory will contain graphical tropical cyclone advisory products.

4) Sub-directory VOLC will be added under the PNG directory. The VOLC directory will contain graphical volcanic ash trajectory and dispersion graphics.

5) The ISCS_ADMIN_MSG will be removed. This directory has been replaced by ADMIN_MSGS.

If you have any questions please contact the WIFS Help Desk at +1(877)280-2811 or wifs.admin@noaa.gov.



12 June 2012

REGARDING ISCS SATELLITE TERMINATION ON 1 JULY 2012

Effective 0400 UTC on 1 July 2012, the FAA will terminate the broadcast over the International Satellite Communications System (ISCS). At that time WIFS will be the primary means of WAFS data distribution. Please see the following Service Change Notice for more information:

http://www.nws.noaa.gov/om/notification/scn12-21iscs_end.htm

To support users during this transition, the WIFS Help Desk will operate continuously beginning at 1200 UTC on 29 June 2012 and ending at 2000 UTC on 2 July 2012.



12 June 2012

REGARDING GRIB1 AND GRIB2 SCHEDULE CHANGES ON 5 JULY 2012

Effective 1200 UTC on 5 July 2012, the transmission times for the WAFS Upper Air Forecasts in GRIB1 and GRIB2 will change. Currently the GRIB1 products are available first followed by the GRIB2 products. Beginning 1200 UTC on 5 July the order will be reversed. The GRIB2 products will be available first followed by the GRIB1 products. This will result in a delay of about 45 minutes for the GRIB1 products. Please reference the following Technical Implementation Notice for more details:

http://www.nws.noaa.gov/om/notification/tin12-20grib_priority.htm



22 November 2011

CHANGE TO PRODUCTION TIME FOR EXPERIMENTAL GRIB2 DATA

Beginning with the 12Z model run on Tuesday, November 29, 2011, a production change will result in the experimental GRIB2 data on WIFS to be available approximately 30 minutes later than it currently is. This change will affect only the trial forecast data available on WIFS at https://www.aviationweather.gov/wifs/GRIB2/KWBC/trial_forecasts.

For more information please visit the WAFSOPSG web page at http://www2.icao.int/en/anb/met/wafsopsg. From the home page click on "Operational Information" on the left hand menu. Then click on the "Operational Information" folder. The details are provided in the PDF file titled "WAFS Change Imp Notice issue (V37) 02 Nov 11".

If you have any questions please contact us.

WIFS Customer Support
wifs.admin@noaa.gov
+1(877)280-2811



20 July 2011

LATE BUFR AND PNG FILES DUE TO WAFC LONDON BACKUP

WAFC Washington is currently backing up WAFC London. Due to international agreements, the products are transmitted about two hours later than normal. You can expect the 12Z Sig Wx High-level and Mid-level BUFR and PNG products to be available at approximately 2045Z. This will only affect the 12Z package.

If you have any questions please contact us.

WIFS Customer Support
wifs.admin@noaa.gov
+1(877)280-2811



5 July 2011

REGARDING USE OF TRAILING SLASH FOR WIFS DIRECTORY LISTINGS AND RECURSIVE REQUESTS

An issue was found related to the structure of wget requests when requesting a directory listing or multiple files via the recursive option. When making a request where the destination is a directory, the trailing slash must be used. For example, in order to recursively get all of the Administrative Messages, you need to issue a command with this format:

wget --user=<usr> --password=<password> -r --no-check-certificate https://www.aviationweather.gov/wifs/data/ADMIN_MSGS/

If you have any questions please contact us.

WIFS Customer Support
wifs.admin@noaa.gov
+1(877)280-2811



1 July 2011

REGARDING GRIB2 DATA PROBLEM BEGINNING APPROX 30 JUNE, 2011.

A problem with our primary data server was causing the WIFS GRIB2 files to contain duplicate records. The problem has been found and a fix has been implemented. We expect the problem to be fixed in the 18Z issuance at approximately 2230Z today. We appreciate your understanding. If you have any questions please contact us.

WIFS Customer Support
wifs.admin@noaa.gov
+1(877)280-2811



13 June 2011

DEPRECATION OF SITE-SPECIFIC URLS - SECOND NOTICE

The following site-specific URLs are being deprecated.

https://hq.aviationweather.gov/wifs/data
https://srh.aviationweather.gov/wifs/data
https://crh.aviationweather.gov/wifs/data

The need for these URLs has been eliminated. Users must change their software to use the load balanced URL:

https://www.aviationweather.gov/wifs/data

The site-specific URLs will not be available after June 26, 2011.

We appreciate your understanding. If you have any questions please contact us.

WIFS Customer Support
wifs.admin@noaa.gov
+1(877)280-2811



7 June 2011

NOTICE OF POTENTIAL DATA INTERRUPTIONS ON 8 JUNE 2011

The maintenance scheduled for 7 June was postponed to 8 June between 1230 and 1345 UTC. For more details see the 3 June 2011 Advisory below.



3 June 2011

NOTICE OF POTENTIAL DATA INTERRUPTIONS ON 7 JUNE 2011

On June 7 between 1230 and 1345 UTC the National Weather Service Telecommunications Operations Center (TOC) is expecting interruptions to data services due to system upgrades and maintenance. This may affect data availability on WIFS in the following areas: International SIGMETs, TAFs, METARs, and PIREPs.

NOTE: WIFS will still be available for use during this period. Once the TOC restores communications, WIFS will immediately begin making the new data available. We apologize in advance for any inconvenience this interruption causes you.



27 April 2011

DEPRECATION OF SITE-SPECIFIC URLS

The following site-specific URLs are being deprecated.

https://hq.aviationweather.gov/wifs/data
https://srh.aviationweather.gov/wifs/data
https://crh.aviationweather.gov/wifs/data

We have taken measures to eliminate the need for these URLs and urge all users to change their software to use the load balanced URL:

https://www.aviationweather.gov/wifs/data

The site-specific URLs will be available for a limited period of time. Users should begin transition to the new URL as soon as possible. Another advisory will be posted when the official deprecation date is known.



30 March 2011

WIFS USERS GUIDE VERSION 4.1 IS AVAILABLE
Version 4.1 of the WIFS Users Guide is now available on the Documents page. Noteworthy changes in this version are:
(1) Modified Section 5 Data Retrieval Process to make it clearer and easier to interpret; this includes removing the site-specific URLs.
(2) Added reference to SADIS User Guide Annexes 1 and 4.



28 February 2011

CHANGE TO GRIB ENCODING OF WAFS PRODUCTS EFFECTIVE MARCH 1, 2011
In the GRIB2 products, Section 1, Identification Section in the GRIB message, Octet 10, which indicates the WMO GRIB Master Table used to encode the data, will be changed from 2 to 6. This change indicates that the products will be encoded and should be decoded using Master Table version number 6. For more information please visit NWS TIN 10-62.



13 October 2010

GRIB2 Trial Forecast data is now available. The data can be retrieved from the /caws/data/wifs/GRIB2/KWBC/trial_forecast/ directory. If you have any questions please email us at wifs.admin@noaa.gov.


PNG file update: The 31-byte header has now been removed. We apologize for any inconvenience this caused you. If you have any questions please email us at wifs.admin@noaa.gov.


The WIFS/ISCS synchronization is still ongoing. We hope to have this synchronization completed by October 29, 2010. IMPORTANT NOTE: The ISCS data feed contains some products that are not yet authorized for distribution over the WAFS. Once a decision is reached these data sets may go away at a yet to be determined date. If you have any questions please send email to wifs.admin@noaa.gov.



6 August 2010

We are in the process of synchronizing the data available on WIFS with what is currently available on ISCS and SADIS. We hope to have this synchronization completed by September 30, 2010. If you have any questions please send email to wifs.admin@noaa.gov.



8 June 2010

The GRIB and GRIB2 data is now available in the concatenated end-state format.



27 April 2010

Due to technical issues, the GRIB and GRIB2 data currently available on WIFS is not in the concatenated end-state format. It's currently being stored in individual WMO files. We're sorry for this inconvenience and hope to have the concatenated format running as soon as possible.



If you have any questions please send email to wifs.admin@noaa.gov.