With this information
•icao identifier: kelp
•field elevation: 3961 feet
•weather: winds 230 at 7 knots, visibility is 10 statue miles, few clouds at 13,000ft, broken at 18,000ft, broken at 25,000ft, tempreture 31 dew point 10, altimiter 3018
*061551z 23007kt 10sm few130 bkn180 bkn250 31/10 a3018
find the
1. pressure altitude (pa)
2. pressure ratio (delta)
3. temperature ratio (theta)
4. density ratio (sigma)
5. density altitude (da; no humidity considered)
6. density altitude with 100% relative humidity