Page 56 - AFMAN 15-111, 12 MAR 2019
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56 AFMAN15-111 12 MARCH 2019
10.8.4.7. A thunderstorm is considered to have ended when 15 minutes has elapsed since
the occurrence of the criteria in paragraph 10.8.4.2. (T-0).
10.8.4.8. If the initial observation to report the beginning or ending of tornadic activity,
hail, or thunderstorm activity is missed (e.g. personnel sheltering for safety), at the first
opportunity, follow the procedures for delayed reporting. Then disseminate a full
observation including the begin/end times of the thunderstorm following the format in
Attachment 3. (T-1).
Figure 10.1. Thunderstorm Determination.
10.8.5. When observed, determine the requirement to report obscurations in conjunction with
the following criteria:
10.8.5.1. When obscurations are reducing the prevailing visibility below 7SM (9999) they
will be encoded in column 5 as a present weather obscuration. (T-1).
10.8.5.2. When obscurations are observed but are not reducing visibility they should be
reported in the remarks section when it is determined to be operationally significant but are
not encoded in column 5. Exception: volcanic ash will always be reported in the body of
the observation when observed, regardless of the visibility and vicinity to the station. (T-
1).
10.8.6. When observed, determine the requirement to report other weather phenomena in
conjunction with the following criteria:
10.8.6.1. Tornadic activity will always be reported in the body of the observation when
observed. (T-1).
10.8.6.2. Funnel clouds, water spouts, and tornadoes will be reported in observations when
first observed, if they transition from one type to another (i.e. FC becomes +FC), and when
they end. (T-1).
