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15. Wind Becoming: 20010KT
See #5 in the METAR section for details. This element may be
omitted if no change is expected.
16. Visibility Becoming: P6SM
See #6 in the METAR section for details. This element may be
omitted if no change is expected.
17. Weather Phenomenon Becoming: NSW
NSW indicates "No Significant Weather". See #7 in the METAR
section for details.
18. Sky Conditions Becoming: SKC
See #8 in the METAR section for details. This element may be
omitted if no change is expected.
19. Change in Conditions: TEMPO 2022
TEMPO indicates "temporary" changes expected as described
between 2000Z (20)and 2200Z (22). "Temporary" indicates a tem-
porary fluctuation in conditions, usually lasting less than one hour.
The described conditions follow this element.
20. Low Level Windshear: WS015/30045KT
WS indicates "windshear" not associated with convective activity.
015 indicates the windshear is expected at 1500 feet AGL. Wind is
expected from 300° (300) at 45 knots (45KT).
21. Change in Conditions: PROB40 0407
PROB40 indicates a 40% "probability" of described conditions
occurring between 0400Z (04)and 0700Z (07). The described con-
ditions follow this element.
UNDERSTANDING PIREPS (PILOT REPORTS)
The following is an example of a typical PIREP with an explanation of
the elements.
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KCRW UA/OV KBKW 360015-KCRW/TM 1815/FL120/TP BE99/SK IMC/
WX RA/TA M08/WV 290030/TB LGT-MDT/IC LGT RIME/RM MDT MXD
ICG DURGC KROA NWBND FL080-100 1750Z
Revision 2 Nov/2002
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A-6
KMD 550/850 FIS Addendum
Appendix A
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