Page 127 - AFMAN 15-111, 12 MAR 2019

AFMAN15-111 12 MARCH 2019 103

Observed Enter in Remarks Section Manual Automated Supplement Back-up
Condition
Remark
Number

tenths of degrees Celsius using three digits. Encode the sign
(See Note 2) of minimum temperature as 1 if the minimum temperature is

below 0°C and 0 if the minimum temperature is 0°C or
(METAR only) higher. For example, a minimum temperature of -0.1°C
would be encoded "21001"; 1.2°C would be encoded

"20012."
33 24-Hour Encode the 24-hour maximum temperature and the 24-hour X O
Maximum and minimum temperature in format, 4snTxTxTxsnTnTnTn, where
Minimum 4 is the group indicator, sn is the sign of the temperature,
Temperature TxTxTx is the maximum 24-hour temperature, and TnTnTn is

the 24-hour minimum temperature encoded in tenths of
(METAR only) degrees Celsius using three digits. Encode the sign of
maximum or minimum temperature as 1 if it is below 0°C

and 0 if it is 0°C or higher. For example, a 24-hour maximum
temperature of 10.0°C and a 24-hour minimum temperature
of -1.5°C would be encoded "401001015"; a 24-hour
maximum temperature of 11.2°C and a 24-hour minimum
temperature of 8.4°C would be encoded as "401120084."

34 3-Hourly Encode the 3-hourly pressure tendency group in format, O X O
Pressure 5appp, where 5 is the group indicator, "a" is the character of
Tendency pressure change over the past 3 hours, and ppp is the amount

of barometric change in tenths of hectopascals. The amount
(See Note 2) of barometric change is encoded using the tens, units, and
tenths digits. For example, a steady increase of 3.2
(METAR only) hectopascals in the past three hours would be encoded
"52032." Note: FBWOSs report pressure net change code

figures that Table 13.4 may not reflect, e.g., 001, 004, 006,
011.