Public Information Statement
Issued by NWS National HQ

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NOUS41 KWBC 011518
PNSWSH

Service Change Notice 15-20 Corrected
National Weather Service Headquarters Washington DC
1117 AM Wed EDT APR 1, 2015

To:       Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPort
          Other NWS partners and employees

From:     Robert Rutledge
          Acting Chief, Aviation Services Branch

Subject:  Corrected: Operational implementation of the Helicopter
          Emergency Medical Services (HEMS) Tool effective
          May 4, 2015

Corrected Effective date to May 4, 2015

Effective May 4, 2015, 1800 Coordinated Universal Time
(UTC), the NWS Aviation Weather Center (AWC) in Kansas
City, MO, will make the Helicopter Emergency Medical
Services (HEMS) Tool operationally available on the
Aviation Weather Center website:

http://www.aviationweather.gov/hemst

The HEMS Tool interactively displays high resolution grids
of critical weather parameters: ceiling, visibility, flight
category, winds, icing severity, relative humidity,
temperature, radar, satellite, G-AIRMETs, SIGMETs, METARs,
TAFs, PIREPs, NWS warnings, and Center Weather Advisories
(CWAs). Overlays include navigational aids, airports and
heliports for the entire United States. More detail is
revealed as you zoom in and individual layers can be turned
on or off independently. The tool is not a weather product;
it is a display that aggregates a number of existing
weather products into a single, quick-glance, automated
graphic. All underlying products have already gone through
a safety risk management process.

HEMS flights represent commercial aviation activity
performed by FAA certificated air carrier operators;
therefore, operations must have the highest level of
safety. Pursuant to Title 49 United States Code Section
44720, the Federal Aviation Administration (FAA)
establishes requirements for the weather information and
services necessary for the safe and efficient conduct of
operations in the National Airspace System (NAS). As such,
NOAA/NWS may be tasked to provide the weather information
and services necessary to meet the requirements established
by the FAA.  Operational implementation of the HEMS tool
has been identified as an FAA requirement.

This tool has been specifically designed to show weather
conditions for short-distance and low-altitude flights that
are common for the HEMS community. By using a highly
interactive and intuitive tool that focuses on small,
localized regions, HEMS operators gain critical weather
awareness to make their flights safer for crews and
patients.

Additional information on HEMS can be found at:

http://www.aviationweather.gov/hemst/help

The Product Description Document can be found at:

https://products.weather.gov/PDD/HEMS_PDD.pdf

If you have any questions regarding the Helicopter Emergency Medical
Services Tool, contact:

LCDR Rebecca Waddington
Executive Officer
Aviation Weather Center
Kansas City, MO 64153
816-584-7262
Rebecca.Waddington@noaa.gov

National Service Change Notices are online at:

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

$$



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