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6 AFMAN15-111 12 MARCH 2019
11.4. Standards and Reporting. ....................................................................................... 59
Table 11.3. Criteria for Variable Ceiling. .................................................................................. 60
11.5. Manual Observing Methods. .................................................................................. 61
Figure 11.1. Sky Cover Evaluation Example. ............................................................................. 62
Figure 11.2. Illustration of the Packing Effect. ........................................................................... 62
Table 11.4. Convective Cloud Height Estimates. ...................................................................... 63
Chapter 12— TEMPERATURE AND DEW POINT 64
12.1. Introduction. ........................................................................................................... 64
12.2. Temperature/Dew Point Group (T'T'/T'dT'd). ......................................................... 64
12.3. Temperature/Dew Point Algorithms. ..................................................................... 64
12.4. Standards and Reporting. ....................................................................................... 64
12.5. Manual Observing Methods. .................................................................................. 64
Chapter 13— PRESSURE 65
13.1. Introduction. ........................................................................................................... 65
13.2. Altimeter (APHPHPHPH). ........................................................................................ 65
13.3. Pressure Measurement Algorithms. ....................................................................... 65
13.4. Standards and Reporting. ....................................................................................... 65
Table 13.1. Units of Measure and Resolution of Pressure Parameters. ..................................... 66
13.5. Manual Observing Methods. .................................................................................. 66
Table 13.2. ALSTG - iHg to hPa. .............................................................................................. 68
Table 13.3. Pressure Tendency Character. ................................................................................. 69
Table 13.4. Amount of Pressure Change in Last 3 Hours. ......................................................... 70
13.6. Comparison and Calibration Procedures. .............................................................. 71
Attachment 1— GLOSSARY OF REFERENCES AND SUPPORTING INFORMATION 73
Attachment 2— SPECIAL (SPECI) CRITERIA 80
Attachment 3— REMARKS 89
Attachment 4— STATION INFORMATION 106
