LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1968 MONTH APRIL ....... ALL TEMPERATURES MINUS C .............. DAY TEMPERATURE C. PCPN AVG WND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 01 56.7 65.6 62.5 0 020 8.3 12 030 0.0 6 677.2 02 58.3 65.6 60.8 T 010 6.4 12 020 0.0 8 675.8 SG 03 55.0 61.7 57.8 T 360 17.9 23 350 0.0 8 675.8 SG,BS 04 50.9 56.1 53.8 T 350 18.4 22 350 0.0 8 677.4 SG,BS 05 50.9 53.9 52.3 0 340 15.0 17 340 0.0 8 679.4 BS 06 52.2 54.4 52.9 0 010 17.6 22 360 0.0 5 676.1 BS 07 51.1 57.8 54.7 0 360 18.7 23 360 0.0 2 674.5 BS 08 55.6 61.7 58.6 0 360 16.4 21 360 0.0 5 680.8 BS 09 52.8 65.6 58.5 0 350 15.5 18 350 0.0 7 685.0 BS 10 51.4 54.4 53.0 0 350 16.7 19 350 0.0 4 681.6 11 52.8 57.8 55.0 0 350 15.8 18 010 0.0 4 684.7 12 44.2 55.6 48.4 T 360 12.7 15 350 0.0 6 685.2 SG 13 28.1 44.2 32.5 T 280 5.8 14 070 0.0 8 684.3 SG 14 28.3 45.0 42.1 T 340 14.1 15 330 0.0 8 687.5 SG 15 45.6 54.4 51.0 T 360 9.5 13 360 0.0 6 689.0 SG 16 45.9 57.8 51.2 T 030 10.3 12 020 0.0 6 686.1 SG 17 46.1 53.9 49.7 T 050 17.8 23 040 0.0 0 680.9 SG,BS 18 42.0 47.2 44.1 0 010 22.7 28 360 0.0 8 674.8 BS 19 42.2 48.3 46.7 0 020 22.2 23 030 0.0 2 677.6 BS 20 45.6 52.2 49.9 0 030 19.2 23 010 0.0 6 672.5 BS 21 51.1 55.6 54.6 0 010 22.1 28 360 0.0 7 676.3 BS 22 55.0 62.8 58.9 0 360 15.0 23 010 0.0 1 683.2 BS 23 58.3 63.3 60.5 0 030 12.6 17 030 0.0 1 684.0 24 60.0 63.9 61.7 0 090 9.8 16 050 0.0 0 685.7 25 54.4 65.0 59.0 0 030 5.5 9 070 0.0 4 692.1 26 53.3 60.6 58.3 0 020 9.2 12 020 0.0 2 695.4 27 57.2 61.7 59.7 0 080 10.8 12 050 0.0 2 693.0 28 60.6 63.9 62.1 0 040 13.5 17 010 0.0 0 693.0 29 55.6 57.8 57.1 0 360 17.8 21 360 0.0 2 693.0 BS 30 56.7 59.4 57.9 0 040 9.2 17 010 0.0 4 690.2 BS AVG 50.6 57.6 54.2 360 14.2 28 360 0.0 5 683.1 18th AVG MONTHLY -54.2 PCPN TRACE NR DAYS CLEAR 10 HIGHEST -28.1 ON 13th SUNSHINE 0.0/ % PARTLY CLOUDY 11 LOWEST -65.6 ON 1st CLOUDY 09 HIGH PRESSURE 695.6 ON 26 LOW PRESSURE 670.8 ON 20 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 Sky Cover changed to Octas. Station Pressure taken from NCDC data. Data rounded to whole mb on original LCD. Average wind speed taken from NCDC data. Data rounded to whole MPH on original LCD. All wind and pressure data taken from original LCD unless otherwise indicated. Changed Extremes: From To Max T -28.3 -28.1 Min T Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T Avg Wnd Spd 14.1 14.2 Avg Press 682.9 683.1 Min T 57.4 57.6 Max Press Fastest Wnd MPH Avg T 54.0 54.2 Min Press Changes to Daily Data: Max Temp Day 4 5 10 12 13 16 18 From: 51.1 51.1 51.7 44.4 28.3 46.1 42.2 To: 50.9 50.9 51.4 44.2 28.1 45.9 42.0 Min Temp Day 9 13 29 From: 62.2 43.9 57.2 To: 65.6 44.2 57.8 Avg Temp Day 1 2 3 4 5 6 7 9 10 11 12 13 14 15 From: 61.1 61.9 58.3 53.6 52.5 53.3 54.4 57.5 53.1 55.3 50.0 36.1 36.7 50.0 To: 62.5 60.8 57.8 53.8 52.3 52.9 54.7 58.5 53.0 55.0 48.4 32.5 42.1 51.0 Day 16 17 18 19 20 21 23 24 25 26 27 28 29 30 From: 51.9 50.0 44.7 45.3 48.9 53.3 60.8 61.9 59.7 56.9 59.4 62.2 56.4 58.1 To: 51.2 49.7 44.1 46.7 49.9 54.6 60.5 61.7 59.0 58.3 59.7 62.1 57.1 57.9 Fast MPH Day 10 19 From: 18 22 To: 19 23 Number of NCDC observations per day: 4