St John's A (YYT) Daily Weather Report 19 December 1963 Hour Sky Condition Vis Weather MSLP TT Td DDFFF StnP Clouds Tw RH LST Km mb degC degC kmh mb degC % 0000 C25 BKN 24.1 1008.2/ -3.9/ -6.7/32 08/ 990.6 SC8 -4.4/ 80 0100 C25 BKN 24.1 1008.8/ -3.3/ -5.6/25 27/ 991.2 SC9 -3.9/ 82 0200 C20 BKN 16.1 SW- 1009.6/ -3.3/ -6.1/29 08/ 992.0 SC9 -4.4/ 82 0300 C20 BKN 16.1 SW- 1010.0/ -3.3/ -6.1/00 00/ 992.4 SC9 -4.4/ 81 0400 C25 BKN 24.1 1010.5/ -2.8/ -5.6/25 29/ 992.9 SC9 -3.9/ 81 0500 C25 BKN 24.1 1010.7/ -2.8/ -5.6/25 24/ 993.2 SC8 -3.9/ 80 0600 C30 BKN 24.1 1011.6/ -2.8/ -5.6/20 16/ 994.1 SC9 -3.9/ 80 0700 15 SCT C30 OVC 24.1 SW- 1012.0/ -3.3/ -6.1/23 16/ 994.6 SC3SC7 -3.9/ 82 0800 15 SCT C30 OVC 24.1 SW- 1012.5/ -3.3/ -6.7/20 10/ 994.9 SC5SC5 -3.9/ 77 0900 15 SCT C25 BKN 24.1 SW- 1011.9/ -2.8/ -6.7/18 10/ 994.3 SC3SC6 -3.9/ 76 1000 15 SCT 30 SCT 250 SCT 24.1 1011.0/ -1.7/ -7.8/23 13/ 993.4 SC1SC2CI1 -3.9/ 64 1100 30 SCT 250 SCT 24.1 1009.1/ -1.7/ -6.7/16 10/ 991.6 SC2CI2 -3.3/ 68 1200 15 SCT 100 SCT C250 BKN 24.1 1007.8/ -1.7/ -6.7/14 24/ 990.3 SC2AS2CI3 -3.3/ 70 1300 15 SCT 100 SCT C250 BKN 24.1 1004.8/ -1.7/ -6.1/14 32/ 987.3 SC2AS3CI3 -3.3/ 72 1400 20 SCT C35 BKN 80 OVC 24.1 1003.1/ -1.1/ -5.0/14 29/ 985.8 SC4SC2AS4 -2.8/ 75 1500 C20 BKN 35 OVC 24.1 1000.6/ -1.1/ -3.9/14 48/ 983.3 SC7SC3 -1.7/ 83 1600 8 SCT C15 OVC 16.1 997.2/ 0.0/ -2.2/11 48/ 979.9 SF4SC6 -1.1/ 86 1700 C6 OVC 12.9 994.3/ 0.0/ -2.2/11 48/ 977.2 ST10 -0.6/ 86 1800 C6 OVC 12.9 991.3/ 0.6/ -0.6/11 56/ 974.2 ST10 0.0/ 91 1900 C5 OVC 4.8 S- 985.3/ 0.0/ -0.6/11 72/ 968.2 ST10 0.0/ 97 2000 C5 OVC 4.8 RIP- 979.6/ 0.6/ 0.0/09 89/ 962.8 ST10 0.6/ 97 2100 C3 OVC 3.2 RF 973.7/ 1.1/ 0.6/11 89/ 956.9 ST10 1.1/ 97 2200 C3 OVC 3.2 RF 970.8/ 2.2/ 1.7/11 80/ 954.0 ST10 2.2/ 97 2300 C12 BKN 100 OVC 12.9 R- 970.5/ 3.3/ 2.2/18 24/ 953.8 SC7AC3 2.8/ 92 Daily Weather Summary Daily Maximum Temperature 3.3 deg C Day with Thunderstorm 0 flag Daily Minimum Temp -4.4 deg C Day with Freezing Rain 0 flag Daily Mean Temp -0.6 deg C Day with Hail 0 flag Daily Maximum RH 97 % Day with Fog/Ice Fog 0 flag Daily Minimum RH 64 % Day with Smoke/Haze 0 flag 6 hr Pcp End 1200Z 0.0 mm Day with BD/BN 0 flag 6 hr Pcp End 1800Z 0.0 mm Day with BS 0 flag 6 hr Pcp End 0000Z 2.5 mm Day with Wind >= 28 kt 1 flag 6 hr Pcp End 0600Z 10.9 mm Day with Wind >= 34 kt 1 flag Total Rainfall 12.7 mm DD Xtrm Gust 16 pts 9 degrees Total Snowfall 0.8 cm FF Xtrm Gust 126 km/h Total Precipitation 13.5 mm Time of Xtrm Gust UTC 0 h UTC Snow on Ground 5 cm St John's A (YYT) Daily Weather Report 20 December 1963 Hour Sky Condition Vis Weather MSLP TT Td DDFFF StnP Clouds Tw RH LST Km mb degC degC kmh mb degC % 0000 5 SCT C25 OVC 12.9 R- 969.4/ 2.2/ 1.1/18 24/ 952.7 SF4SC6 1.7/ 92 0100 5 SCT 25 SCT 24.1 970.5/ 1.1/ -0.6/20 48/ 953.8 SF1SC2 0.0/ 89 0200 25 SCT 24.1 970.9/ -1.1/ -3.3/20 43/ 954.2 SC2 -1.7/ 84 0300 C20 OVC 12.9 SW- 971.5/ -1.7/ -3.9/20 51/ 954.8 SC10 -2.2/ 85 0400 C20 OVC 6.4 SW-BS 972.3/ -2.8/ -4.4/20 40/ 955.6 SC10 -3.3/ 86 0500 C25 BKN 6.4 SW-BS 973.3/ -2.8/ -4.4/20 71/ 956.5 SC8 -3.3/ 86 0600 -X C20 OVC 3.2 SW-BS 974.0/ -3.9/ -5.6/20 55/ 957.2 W4SC6 -4.4/ 87 0700 C3 X 0.4 SWBS 974.8/ -5.0/ -6.7/23 45/ 958.0 W10 -5.0/ 88 0800 C15 BKN 8.0 SW-BS 975.4/ -3.9/ -6.7/20 40/ 958.6 SC8 -4.4/ 83 0900 15 SCT C25 BKN 8.0 SW-BS 976.2/ -3.9/ -6.7/23 40/ 959.4 SF3SC6 -4.4/ 80 1000 C0 X 0.2 SW+BS 977.3/ -3.9/ -6.1/23 35/ 960.5 W10 -4.4/ 85 1100 C15 BKN 25 BKN 8.0 SW-BS 977.7/ -3.9/ -6.7/23 64/ 960.9 CF6SC2 -4.4/ 83 1200 15 SCT C25 BKN 12.9 SW- 977.7/ -3.9/ -6.7/23 64/ 960.9 CF3SC6 -4.4/ 80 1300 15 SCT C30 BKN 12.9 SW- 978.0/ -3.9/ -7.2/23 64/ 961.2 CF2SC6 -5.0/ 78 1400 C18 BKN 30 BKN 12.9 SW- 978.8/ -3.9/ -7.8/23 56/ 962.0 SF6CU3 -5.0/ 76 1500 C16 BKN 30 BKN 12.9 SW- 980.3/ -3.9/ -7.2/23 48/ 963.5 SF8TCU1 -5.0/ 78 1600 C16 BKN 30 BKN 9.7 SW- 980.7/ -5.0/ -8.3/23 48/ 963.9 SF7CU2 -5.6/ 79 1700 15 SCT C30 BKN 16.1 SW- 981.8/ -5.6/ -8.3/23 48/ 964.8 SF3SC4 -6.1/ 80 1800 15 SCT C30 BKN 12.9 SW- 982.2/ -5.6/ -8.3/23 48/ 965.2 SF3SC5 -6.1/ 82 1900 15 SCT 30 SCT 16.1 SW- 982.9/ -5.6/ -8.3/23 48/ 965.9 SF3SC2 -6.1/ 82 2000 15 SCT 30 SCT 16.1 SW- 982.9/ -5.0/ -7.8/23 56/ 965.9 SF2SC3 -5.6/ 82 2100 30 SCT 24.1 983.5/ -5.6/ -8.3/23 56/ 966.5 SC3 -6.1/ 80 2200 15 SCT C30 BKN 4.8 SW- 984.3/ -5.6/ -8.3/23 48/ 967.3 SF4SC5 -6.1/ 82 2300 15 SCT C30 BKN 12.9 SW- 984.9/ -5.6/ -8.3/23 48/ 967.9 SF2SC4 -6.1/ 80 Daily Weather Summary Daily Maximum Temperature -1.1 deg C Day with Thunderstorm 0 flag Daily Minimum Temp -6.7 deg C Day with Freezing Rain 0 flag Daily Mean Temp -3.9 deg C Day with Hail 0 flag Daily Maximum RH 88 % Day with Fog/Ice Fog 0 flag Daily Minimum RH 74 % Day with Smoke/Haze 0 flag 6 hr Pcp End 1200Z 2.0 mm Day with BD/BN 0 flag 6 hr Pcp End 1800Z 1.5 mm Day with BS 1 flag 6 hr Pcp End 0000Z 0.3 mm Day with Wind >= 28 kt 1 flag 6 hr Pcp End 0600Z 0.0 mm Day with Wind >= 34 kt 1 flag Total Rainfall 0.0 mm DD Xtrm Gust 16 pts 20 degrees Total Snowfall 4.8 cm FF Xtrm Gust 153 km/h Total Precipitation 3.8 mm Time of Xtrm Gust UTC 10 h UTC Snow on Ground 0 cm