IRFP-01
Metro Review
e. Other abbreviations
(1) MIC (maximum instantaneous coverage) - the percent of
the area which will be covered by thunderstorm cells at
time of maximum activity
(2) TAA (total area affected) - the percent of the area which
will experience one or more thunderstorms during the
applicable valid period
(3) EP (entire period) - used if the phenomena are expected
for the entire period instead of a particular time period
f.
Maximum thunderstorm tops
(1) The percentages of MIC and TAA will be entered in the
thunderstorm areas as MIC/TAA (such as 3/25)
(2) The advisory areas will be enclosed by solid lines with a
letter designator within the area
(3) Forecast areas depict the worst conditions expected during
period noted
g. Teletype bulletin - This bulletin contains information identical to
the facsimile product
NOTE: It also serves to amend and correct both the facsimile
and teletype product.
h. Using the chart
(1) Use the contents of this advisory strictly as a preflight aid
to help plan your route of flight to avoid possible severe
weather
(2) Compare the MWA forecast with the existing or latest
weather in the available weather charts and teletype
reports
VII. En route procedures 21.1.1.9.1
A. Sources of in-flight weather information
NOTE: The sources below are listed in the order in which they should
be used.
1. Pilot-to-Metro Service (PMSV)
a. Operated out of NASs, MCASs, and USAF bases—call name
example: “Kingsville Metro” or “Metro”
(8-97) Original
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