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-------- Original Message -------- 629 NOUS41 KWBC 221825 PNSWSHTechnical Implementation Notice 11-58, Amended
National Weather Service Headquarters Washington DC 225 PM EDT Fri Jun 22 2012To: National Weather Service (NWS) Offices
Federal Aviation Administration (FAA) Customers
Family of Services (FOS) Subscribers
Other Customers of NWS Aviation Forecasts
From: Cynthia Abelman
Chief, Aviation Services Branch
Subject: Ceiling and Visibility Analysis Product to Become
Operational Effective July 24, 2012.
Note: The following changes have no impact on NOAA
Weather Wire Service subscribersEffective July 24, 2012, at 1800 Coordinated Universal Time
(UTC), the NWS Aviation Weather Center in Kansas City, MO, will
make the Ceiling and Visibility Analysis (CVA) operationally
available on the Aviation Digital Data Service (ADDS) Website.
CVA presents simplified area maps of ceiling, visibility and
flight category outlined as:
Ceiling estimates are displayed as
(i) Possible Terrain Obscuration (pale
orange) for ceilings less than 200 ft agl,
(ii) less than or equal to 1000 ft agl (pale
yellow) from 200 to 999 ft, agl, and
(iii) 1000 ft agl or greater (pale blue).
Visibility estimates are displayed as
(i) less than 3 miles (pale yellow), and
(ii) 3 miles or greater (pale blue).
CVA is intended to accompany other aviation weather products such
as METARS, AIRMETS, TAFs and Area Forecasts to help the general
aviation pilot (particularly the VFR-only pilot) avoid IFR
conditions. To remain current in rapidly changing conditions,
CVA is updated every 5 minutes using the latest observations. The
use of CVA should be followed by further examination of METARs,
TAFs, AIRMETs, Area Forecasts and other weather information.
CVA primarily is intended to help the general aviation pilot;
however, CVA's quick-glance overview of ceiling and visibility
conditions can be useful to others involved in flight planning or
weather briefing.
CVA initially will be available only via the ADDS website at:
http://www.aviationweather.gov/adds/cv
For questions regarding the new CVA product, contact:
Robert Sallee
Senior Software Engineer - Aviation Weather Center
Kansas City, MO 64153
Phone: 816-584-7256
E-mail: Robert.sallee@xxxxxxxx
NWS Technical Implementation Notices are online at:
http://www.nws.noaa.gov/om/notif.htm
$$
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