Metro-02
Meteorology and Flight Planning
4.
Latest revisions to program designed to meet
overlapping requirements of large versus small
aircraft, aircraft operating under visual flight rules
(VFR) and instrument flight rules (IFR), small aircraft
operating higher, and larger aircraft sometimes
operating lower
5.
Responsibility for Issuance - The National Aviation
Weather Advisory Unit (NAWAU) in Kansas City,
Missouri, has the responsibility for issuing WAs,
WSTs, and WSs for the conterminous United States
a.
Designated forecaster(s) maintain watch on
weather developments using weather radar,
surface observations, PIREPs, and satellite
image information
b.
Additional information used consists of
information from the National Meteorological
Center (NMC), products from the NMC National
Severe Storms Forecast Center, Hurricane
advisories, and forecasts from Weather Service
Field Offices (WSFO)
6.
Standardizations - The following standardizations
shall apply to all In-Flight Advisories
a.
All heights or altitudes shall be stated with
reference to mean sea level (MSL), except in
the case of low ceilings which shall be
referenced to "above ground level" and
indicated by "CIGS," e.g., CIGS BLO 10
b.
Domestic In-Flight Advisories shall describe
designated weather conditions up to and
including 45,000 ft (150 millibars)
c.
Any abbreviations or contractions used in the
advisories shall conform with FAA Contractions
Handbook 7340.1
d.
Weather and obstructions to visibility shall be
indicated by using the weather abbreviations
used for METARs (see FLIP GP Chapter 8)
(7-97) Original
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