NOUS41 KWBC 111505

PNSWSH    

 

Service Change Notice 17-87

National Weather Service Headquarters Silver Spring, MD

1105 AM EDT Tue Jul 11 2017

 

To:       Subscribers:

          -NOAA Weather Wire Service

          -Federal Aviation Administration (FAA) Offices

          -NOAAPort

          Other NWS partners and employees

 

From:    William Bauman

         Chief, Aviation and Space Weather Services Branch

 

Subject: Operational Implementation of Aviation Surface Forecast

         and Aviation Cloud Forecast Graphics Effective

         July 10, 2017

 

Effective July 10, 2017, the Experimental Aviation Surface

Forecast and Aviation Cloud Forecast graphics produced by the

NWS Aviation Weather Center (AWC) will transition to 

operational status.

 

The Aviation Surface Forecast and Aviation Cloud Forecast

graphics are snapshot images derived from a subset of the

aviation weather forecasts. The products are valid for the

continental United States (CONUS) and coastal waters used within

the Graphical Forecasts for Aviation (GFA) interactive web-based

display which became operational April 13, 2017. See Service

Change Notice 17-31:

http://www.nws.noaa.gov/om/notification/scn17-31awc_exp_graphics.htm

 

The static images are provided every 3 hours for one CONUS

projection and nine regional projections with 3-hourly forecasts

of Surface (predominant weather, visibility, wind) and cloud

coverage and layer (bases and tops) information out to 18 hours.

Details of the forecast graphics can be found in the Product

Description Document (PDD):

http://products.weather.gov/PDD/PDD_AviationForecastGraphics_062217.pdf

 

The Federal Aviation Administration (FAA), pursuant to Title 49

United States Code Section 44720, established requirements for

this weather information and service necessary for the safe and

efficient conduct of operations in the National Airspace System.

 

These graphics provide a low-bandwidth alternative to the GFA

interactive web-based display and are provided through

NOAAPORT/SBN and via the AWC Web Page. The static images are

intended for FAA Flight Service Station (FSS) providers,

commercial and General Aviation pilots, operators, briefers and

dispatchers with limited Internet access.

 

These Portable Network Graphics (PNG) images will be available

over NOAAPORT/Satellite Broadcast Network. World Meteorological

Organization (WMO) header information is as follows:

 

T1T2A1A2ii CCCC

- CCCC is KKCI (Aviation Weather Center)

- T1 = Q (Regional Static Graphic)

- T2 specifies the forecast graphic as follows:

     = I for the Aviation Clouds Forecast Graphic

     = Z for the Aviation Surface Forecast Graphic

- A1 = T (Northern Hemisphere)

- A2 specifies the forecast time as follows:

     = B for the 3 hour forecast

     = C for the 6 hour forecast

     = D for the 9 hour forecast

     = E for the 12 hour forecast

     = F for the 15 hour forecast

     = G for the 18 hour forecast

- When T2 = I, ii specifies the regional domain of the Aviation

Clouds Forecast Graphic as follows:

     = 00 for Continental United States

     = 01 for Northeastern United States

     = 02 for Eastern United States

     = 03 for Southeastern United States

     = 04 for North Central United States

     = 05 for Central United States

     = 06 for South Central United States

     = 07 for Northwestern United States

     = 08 for Western United States

     = 09 for Southwestern United States

- When T2 = Z, ii specifies the regional domain of the Aviation

Surface Forecast Graphic as follows:

     = 90 for Continental United States

     = 91 for Northeastern United States

     = 92 for Eastern United States

     = 93 for Southeastern United States

     = 94 for North Central United States

     = 95 for Central United States

     = 96 for South Central United States

     = 97 for Northwestern United States

     = 98 for Western United States

     = 99 for Southwestern United States

 

Additionally, the Aviation Surface Forecast and Aviation Cloud

Forecast Graphics can be found at:

https://www.AviationWeather.gov/gfa/plot

 

Based on comments received by FAA and other NWS users, NWS plans

to discontinue production of CONUS FAs. This change will occur

after a 90-day parallel operations transition period starting

when the GFA interactive web-based display and the Aviation

Surface Forecast and Aviation Clouds Forecast graphics are

implemented operationally. Formal public notification will be

provided in advance of the action to discontinue the CONUS FAs.

 

The effective date of this change is sooner than specified by

NWS policy (NWS Instruction 10-1805). The reduction of the

normal advance lead time is needed to support the 90-day

parallel operations transition period for FAA Flight Service

providers.

 

For technical questions regarding this notice, please contact:

Debra Blondin

Domestic Operations Branch Chief

Aviation Weather Center

Kansas City, MO 64153

816-584-7207

Debra.Blondin@noaa.gov

 

For policy questions regarding this notice, please contact:

Kevin Stone

Meteorologist

National Weather Service Headquarters

Silver Spring, MD

301-427-9363

Kevin.Stone@noaa.gov

 

National Service Change Notices are online at:

   

http://www.nws.noaa.gov/om/notif.htm

 

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