***Corrected Winter 2010*** LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1969 MONTH APRIL .... ALL TEMPERATURES MINUS C.... DAY TEMPERATURE C PCPN AVG WIND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 1 55.6 60.6 58.6 0 080 16.7 24 030 M 3 695.6 BS 2 56.1 61.1 58.5 0 070 13.8 23 060 M 2 690.6 3 55.0 61.7 56.5 0 040 8.1 18 120 M 5 689.0 4 52.8 58.9 57.4 0 060 9.8 14 070 M 5 690.6 5 53.3 59.4 56.0 0 040 11.8 14 060 M 4 695.4 6 50.9 58.9 51.9 0 010 13.0 16 020 M 5 695.4 7 49.4 57.2 52.1 T 050 9.5 18 030 M 5 699.7 8 48.6 57.2 53.8 0 080 16.1 18 070 M 1 703.1 9 43.9 60.0 57.8 0 080 17.3 23 080 M 1 699.1 BS 10 49.2 60.6 51.6 0 060 26.2 32 060 M 2 688.8 BS 11 48.3 56.7 53.6 0 010 17.8 35 020 M 3 686.5 BS 12 52.2 63.9 62.1 T 050 13.2 22 010 M 1 685.1 IC,BS 13 60.0 64.4 61.8 T 050 13.2 20 050 M 2 681.3 IC 14 56.1 61.7 57.4 0 030 19.5 23 050 M 3 676.6 BS 15 52.2 58.9 54.6 0 010 20.5 23 010 M 5 685.3 BS 16 52.2 56.1 54.4 0 030 21.6 25 020 M 3 686.3 BS 17 48.1 55.6 51.0 0 030 21.9 28 020 M 7 682.4 BS 18 51.1 58.9 57.6 0 070 16.4 28 030 M 3 677.4 BS 19 51.7 58.9 53.0 0 030 19.6 22 070 M 1 672.5 BS 20 51.7 57.2 55.4 0 030 16.1 22 030 M 2 679.5 BS 21 47.0 57.2 51.3 0 030 21.6 24 040 M 1 677.8 BS 22 33.7 52.8 39.2 T 020 20.4 25 030 M 4 682.5 SG,BS 23 34.4 52.2 47.7 T 010 17.5 23 020 M 6 685.6 IC,BS 24 46.1 52.2 50.6 0 010 16.4 19 010 M 5 683.7 BS 25 47.5 53.9 49.4 0 110 13.3 21 020 M 3 678.3 26 47.2 63.3 61.0 0 120 16.7 23 120 M 1 667.8 BS 27 58.9 66.7 62.5 0 010 17.1 23 130 M 2 670.2 28 57.2 63.9 58.6 0 020 18.7 25 010 M 2 677.8 BS 29 52.2 60.6 55.5 0 360 16.9 23 020 M 1 676.5 BS 30 51.7 60.6 57.6 0 360 11.5 22 360 M 2 681.1 AVG 50.5 59.0 54.9 T 030 16.4 35 020 M 3 684.7 11th AVG MONTHLY -54.9 PCPN TRACE NR DAYS CLEAR 16 HIGHEST -33.7 ON 22nd SUNSHINE M PARTLY CLOUDY 14 LOWEST -66.7 ON 27th CLOUDY 00 HIGH PRESSURE 703.7 ON 8th LOW PRESSURE 664.1 ON 27th NET CHANGE IN SNOWSTAKE FIELD: 9.99 SNOWSTAKE DATA NOT AVAILABLE. The following data was changed from the old LCD: All Average Temps recalculated for 24hrs instead of Max+Min/2. Individual Data changed to reflect extremes from LCD and NCDC Data. All Average Sky Cover changed to reflect data from 00Z through 00Z daily. All Sky Cover changed to Octas. Peak wind speed, peak wind direction, precipitation, sunshine amount, and present wx reported in NZST. Insufficient data to convert these values to UTC. All temperature, wind, and pressure data taken from NCDC data. LCD data originally reported in NZST. Changed Extremes: From To Max T -33.9 -33.7 Min T Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 51.1 50.5 Avg Wnd Spd Avg Press 684.8 684.7 Min T 58.4 59.0 Max Press 703.5 703.7 Fastest Wnd MPH Avg T 54.8 54.9 Min Press Changes to Daily Data: Max Temp Day 6 8 10 13 15 17 21 22 25 27 28 29 From: 51.1 50.6 51.7 61.7 53.3 48.3 52.8 33.9 47.8 59.4 58.9 56.1 To: 50.9 48.6 49.2 60.0 52.2 48.1 47.0 33.7 47.5 58.9 57.2 52.2 Min Temp Day 1 9 11 12 20 23 25 26 30 From: 59.4 58.3 53.3 61.7 55.0 47.2 52.8 60.6 59.4 To: 60.6 60.0 56.7 63.9 57.2 52.2 53.9 63.3 60.6 Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 From: 57.5 58.6 58.3 55.8 56.4 55.0 53.3 53.9 51.1 56.1 50.8 56.9 63.1 58.9 56.1 54.2 To: 58.6 58.5 56.5 57.4 56.0 51.9 52.1 53.8 57.8 51.6 53.6 62.1 61.8 57.4 54.6 54.4 Day 17 18 19 20 21 22 23 24 25 26 27 28 29 30 From: 51.9 55.0 55.3 53.3 55.0 43.3 40.8 49.2 50.3 53.9 63.1 61.4 58.3 55.6 To: 51.0 57.6 53.0 55.4 51.3 39.2 47.7 50.6 49.4 61.0 62.5 58.6 55.5 57.6 Number of NCDC observations per day: 4