SLP
Reports the atmospheric pressure adjusted to mean sea level in hectopascals (millibars), encoded as a three-digit number. To decode, prefix with either 9 or 10 (whichever brings it closer to 1000) and place a decimal before the last digit. For example, SLP982 means 998.2 hPa, and SLP135 means 1013.5 hPa. Useful for monitoring pressure trends.
SLP982
SLP135
SLP009
SLP stands for "Sea Level Pressure" in the remarks section of a METAR report. Reports the atmospheric pressure adjusted to mean sea level in hectopascals (millibars), encoded as a three-digit number. To decode, prefix with either 9 or 10 (whichever brings it closer to 1000) and place a decimal before the last digit. For example, SLP982 means 998.2 hPa, and SLP135 means 1013.5 hPa. Useful for monitoring pressure trends.
SLP appears in the remarks (RMK) section at the end of a METAR observation. The remarks section follows the main body of the METAR and provides additional details about the observation that don't fit into the standard coded format.
Here is an example: "SLP982". This appears in the remarks section and indicates sea level pressure information as part of the weather observation.