IRFP-01
Metro Review
(1) Wind information is never forecast for altitudes within
1,500 ft of the surface
(2) Temperature information is never forecast at any altitude
within 2,500 ft of the surface
(3) Temperature information is never forecast for the 3,000 ft
level
4. InterpolationOften the wind information will not be forecast for
the altitude which the pilot wishes to file. In this case, they must
interpolate for the desired information
G. National Weather Service (NWS) Severe Weather Reports and
Forecasts 21.1.1.4.6
NOTE: Flight is not specifically prohibited in the areas where
convective outlooks, AIRMETs, SIGMETs, and convective SIGMETs
are active, but common sense and experience should help determine
your flight decision making. However, Severe Weather Watch bulletins
(WW) and CNATRA Weather Warnings (CAWW) do prohibit flight in
the areas covered.
1. Convective Outlooks (AC)
a. Issued by the National Severe Storm Forecast Center
(NSSFC) in Kansas City
b. Outlines potential general thunderstorm activity and areas
where thunderstorm intensity may approach severe limits
c.
Disseminated 3 times daily (2 times daily between September
1 and January 31) - 24-hour forecast period
d. Format - Narrative presents affected region and rationale of
the forecast
NOTE: ACs can alert a pilot several hours in advance of
possible severe or widespread convective activity.
2. Severe Weather Watch bulletin (WW)
a. Issued by the NSSFC in Kansas City
b. Defines areas of possible severe thunderstorms and
tornadoes; describes level of intensity, hail size, wind speeds,
CB tops, estimated cell movement, cause of severe weather,
and updates convective outlooks (AC)
c.
Disseminated as needed
d. Format - Report contains the type and location of severe
weather expected
(8-97) Original
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