173 12 1 1 1918 1 1 1918 6 Low cloud, snow 2 Light Heavy EOR 2 1 1918 2 1 1918 6 Thick mist, low cloud, snow restrict operations 1 Medium Heavy EOR 3 1 1918 3 1 1918 6 clear early, then snow storms, high winds 2 Heavy Heavy EOR 4 1 1918 4 1 1918 1 clear, cold 2 None Heavy EOR 5 1 1918 5 1 1918 4 Low clouds, mist restrict operations 1 None Heavy EOR 6 1 1918 6 1 1918 4 Thick clouds, westerly winds 2 None Heavy EOR 7 1 1918 7 1 1918 4 Thick clouds, black skies prevent much Service flying 1 None Heavy EOR 8 1 1918 8 1 1918 6 Snow-storms cancel operations 0 Heavy Heavy EOR 9 1 1918 9 1 1918 6 Bitterly cold. Snow-storms restrict operations 1 Medium Heavy EOR 10 1 1918 10 1 1918 4 NE wind, masses of clouds racing across sky 2 None Heavy EOR 11 1 1918 12 1 1918 6 Low clouds, mist, wind greatly interfere with work 1 Medium Medium EOR 13 1 1918 13 1 1918 2 Weather mainly fine 2 None Light EOR 14 1 1918 14 1 1918 3 Misty 2 None Heavy EOR 15 1 1918 15 1 1918 6 Heavy rain all day cancels operations 0 Heavy Light EOR 16 1 1918 16 1 1918 6 Heavy rain all day prevents much Service flying 1 Heavy None EOR 17 1 1918 17 1 1918 6 Heavy rain all day cancels operations 0 Heavy None EOR 18 1 1918 19 1 1918 3 Cumulonimbus 2 None None EOR 20 1 1918 21 1 1918 6 Low clouds, mist prevents much Service flying 1 Heavy None EOR 22 1 1918 22 1 1918 6 Low clouds, mist 2 Light None EOR 23 1 1918 23 1 1918 5 Low clouds, mist 1 None None EOR 24 1 1918 24 1 1918 6 Low clouds, mist 2 Medium None EOR 25 1 1918 26 1 1918 2 Sunny, thin patchy cloud 2 None None EOR 27 1 1918 27 1 1918 4 Dense fog prevents much Service flying 1 None None EOR 28 1 1918 30 1 1918 1 Misty patches 2 None None EOR 31 1 1918 31 1 1918 4 Thick mist restricts operations 1 None None EOR 1 2 1918 1 2 1918 4 Dense fog cancels operations 0 None None EOR 2 2 1918 4 2 1918 2 Sunny with high cirrus 2 None None EOR 5 2 1918 6 2 1918 4 Thick cumulonimbus 2 None None EOR 7 2 1918 7 2 1918 6 Mist, rain, high winds interfere with operations 1 Medium None EOR 8 2 1918 8 2 1918 6 Mist, rain, high winds cancel operations 0 Heavy None EOR 9 2 1918 9 2 1918 2 High scattered cloud 1 None None EOR 10 2 1918 10 2 1918 2 Cold. Great banks of cumulonimbus. Little flying 1 None None EOR 11 2 1918 12 2 1918 1 Cold. Strong Westerlies. Little flying 1 None Light EOR 13 2 1918 15 2 1918 4 Overcast. Rain and mist. Little flying 1 None None EOR 16 2 1918 19 2 1918 1 Weather fine, visibility good 2 None None EOR 20 2 1918 20 2 1918 6 Mist, afternoon showers. Strong N wind 1 Light None EOR 21 2 1918 21 2 1918 2 Weather mostly fine, visibility good. 2 Light None EOR 22 2 1918 22 2 1918 6 Cold snap - low scudding cloud. Very little flying 1 Light Light EOR 23 2 1918 23 2 1918 6 Cold, stormy. Little Service flying 0 Light Light EOR 24 2 1918 25 2 1918 3 Cold, low cloud. Little Service flying 1 None Light EOR 26 2 1918 28 2 1918 3 Squalls, low cloud, misty. Little Service flying 1 Light Light EOR 1 3 1918 1 3 1918 6 Low cloud, towering cumulus. Little activity 1 Light Light EOR 2 3 1918 4 3 1918 6 Low, thick cloud, mist, snow. No Service flying 0 Light Light EOR 5 3 1918 5 3 1918 5 Unsettled 1 None Light EOR 6 3 1918 6 3 1918 5 Unsettled, scattered cloud 2 None None EOR 7 3 1918 7 3 1918 5 Unsettled, towering cumulus. Little activity 1 None None EOR 8 3 1918 8 3 1918 5 Unsettled 2 None None EOR 9 3 1918 9 3 1918 3 Much scattered cloud 3 None None EOR 10 3 1918 14 3 1918 2 Scattered cloud 2 None None EOR 15 3 1918 18 3 1918 1 Bright and sunny 2 None None EOR 19 3 1918 20 3 1918 6 Low clouds and rain. No Service flying 0 Medium None EOR 21 3 1918 22 3 1918 6 Low clouds, very misty, thick fog 3 Light None EOR 23 3 1918 26 3 1918 1 Bright and sunny 3 None None EOR 27 3 1918 27 3 1918 3 Mist and heavy cloud 3 None None EOR 28 3 1918 28 3 1918 6 Strong SW wind and heavy cloud 3 Light None EOR 29 3 1918 30 3 1918 6 strong winds and heavy cloud 2 Medium None EOR 31 3 1918 31 3 1918 6 Heavy overcast 1 Heavy None EOR 1 4 1918 2 4 1918 3 Massive cumulus formations 3 None None EOR 3 4 1918 5 4 1918 6 Low cloud, blustery wind, rain hamper operations 1 Light None EOR 6 4 1918 6 4 1918 6 Low cloud, rain 3 Light None EOR 7 4 1918 7 4 1918 2 Cirrus at height, no wind. Haze on battlefield 2 None None EOR 8 4 1918 10 4 1918 6 Thick mist, drizzle. Limited operations 1 Light None EOR 11 4 1918 11 4 1918 4 Mist, low clouds 2 None None EOR 12 4 1918 12 4 1918 1 Fine weather, good visibility 3 None None EOR 13 4 1918 17 4 1918 6 Mist, low clouds. Little activity 1 Light None EOR 18 4 1918 19 4 1918 6 Strong winds, hail, snow. Little activity 1 Medium Light EOR 20 4 1918 22 4 1918 2 Fine weather, good visibility 2 None None EOR 23 4 1918 23 4 1918 3 Low cloud, poor visibility 2 None None EOR 24 4 1918 27 4 1918 4 Low cloud, mist, poor visibility hamper operations 1 None None EOR 28 4 1918 28 4 1918 6 Low cloud, mist cancel operations 0 Medium None EOR 29 4 1918 1 5 1918 4 Low cloud, mist, poor visibility restrict flying 1 None None EOR 2 5 1918 2 5 1918 1 Fine weather, low haze 2 None None EOR 3 5 1918 3 5 1918 1 very thick haze 3 None None EOR 4 5 1918 7 5 1918 6 Low cloud, mist and rain limit activity 1 Light None EOR 8 5 1918 10 5 1918 3 Low haze, mist 2 None None EOR 11 5 1918 12 5 1918 3 Low clouds, thick mist. Limited activity 1 None None EOR 13 5 1918 13 5 1918 6 Low cloud, rain limit activity 1 Medium None EOR 14 5 1918 14 5 1918 3 Overcast, gaps in clouds 1 None None EOR 15 5 1918 19 5 1918 2 Fine, but hazy. Thunderheads in pm 2 None None EOR 20 5 1918 23 5 1918 2 Fine, but hazy. Thunderheads in pm 1 None None EOR 24 5 1918 24 5 1918 6 Rain throughout day. Minimal activity 1 Medium None EOR 25 5 1918 26 5 1918 4 Huge cumulus clouds at all levels 1 None None EOR 27 5 1918 27 5 1918 3 Fine but cloudy. Poor visibility 3 None None EOR 28 5 1918 29 5 1918 3 Fine but cloudy. Poor visibility 1 None None EOR 30 5 1918 1 6 1918 3 Fine, visibility fair 2 None None EOR 2 6 1918 3 6 1918 2 High cirrus. Little activity 1 None None EOR 4 6 1918 5 6 1918 3 Westerly winds, low clouds 1 None None EOR 6 6 1918 8 6 1918 4 Thick haze, heavy clouds 1 None None EOR 9 6 1918 9 6 1918 5 Unsettled 2 None None EOR 10 6 1918 11 6 1918 6 Overcast, bright intervals 1 Medium None EOR 12 6 1918 15 6 1918 5 High cumulus, fair intervals. NE wind 1 None None EOR 16 6 1918 18 6 1918 5 Strong winds, thunderheads in pm 2 None None EOR 19 6 1918 21 6 1918 6 Storms, low scudding clouds 1 Medium None EOR 22 6 1918 24 6 1918 2 High cirrus, strong Westerlies 1 None None EOR 25 6 1918 26 6 1918 2 High scattered, strong Easterlies 1 None None EOR 27 6 1918 28 6 1918 1 Fine clear day 3 None None EOR 29 6 1918 2 7 1918 1 Fine clear day 2 None None EOR 3 7 1918 3 7 1918 4 Heavy clouds 1 None None EOR 4 7 1918 5 7 1918 1 Fine clear day, strong West wind 2 None None EOR 6 7 1918 7 7 1918 4 Massive cumulonimbus 1 None None EOR 8 7 1918 10 7 1918 6 Cloudy, occasional thundershowers 2 Light None EOR 11 7 1918 12 7 1918 6 Weather, low clouds and rain 1 Medium None EOR 13 7 1918 14 7 1918 6 Low clouds and thundershowers 2 Light None EOR 15 7 1918 16 7 1918 6 Low clouds and thundershowers 3 Medium None EOR 17 7 1918 17 7 1918 5 Thunderstorms in evening 1 Light None EOR 18 7 1918 19 7 1918 2 High winds, clouds 2 None None EOR 20 7 1918 21 7 1918 5 High winds, thunderheads in pm 2 None None EOR 22 7 1918 22 7 1918 1 Bright clear day 2 None None EOR 23 7 1918 23 7 1918 6 Strong Easterlies 1 Medium None EOR 24 7 1918 25 7 1918 2 Strong Easterlies 2 None None EOR 26 7 1918 27 7 1918 6 Low clouds, rainshowers 1 Light None EOR 28 7 1918 29 7 1918 5 Haze 2 None None EOR 30 7 1918 1 8 1918 2 Haze, ground mist 2 None None EOR 2 8 1918 4 8 1918 5 Fine, late afternoon showers 1 Light None EOR 5 8 1918 7 8 1918 6 Low clouds, showers 1 Light None EOR 8 8 1918 8 8 1918 5 Low clouds, showers in morning 3 Light None EOR 9 8 1918 13 8 1918 2 Fine, clouds in morning 3 None None EOR 14 8 1918 15 8 1918 1 Low haze 2 None None EOR 16 8 1918 17 8 1918 2 Clouds in afternoon 2 None None EOR 18 8 1918 18 8 1918 4 Low clouds, high winds 1 None None EOR 19 8 1918 19 8 1918 3 Broken clouds 2 None None EOR 20 8 1918 20 8 1918 6 Low clouds, mist 1 Light None EOR 21 8 1918 21 8 1918 6 Low clouds, mist 3 Light None EOR 22 8 1918 22 8 1918 1 Fine, good visibility 3 None None EOR 23 8 1918 23 8 1918 3 Cloudy 3 None None EOR 24 8 1918 24 8 1918 5 Low clouds 1 None None EOR 25 8 1918 25 8 1918 1 Hazy 2 None None EOR 26 8 1918 27 8 1918 6 Low cloud, rainstorms 2 Medium None EOR 28 8 1918 28 8 1918 6 Low cloud, rainstorms 1 Medium None EOR 29 8 1918 31 8 1918 3 Fair, but cloudy 2 None None EOR 1 9 1918 1 9 1918 1 High wind, visibility good 2 None None EOR 2 9 1918 2 9 1918 5 Showers, bright intervals 3 Light None EOR 3 9 1918 4 9 1918 3 Cloudy 3 None None EOR 5 9 1918 5 9 1918 1 Fine 3 None None EOR 6 9 1918 6 9 1918 2 Fair 2 None None EOR 7 9 1918 9 9 1918 6 Low cloud, late rainstorms 1 Light None EOR 10 9 1918 11 9 1918 6 High wind, rainstorms 1 Heavy None EOR 12 9 1918 14 9 1918 6 High wind, large storms 1 Heavy None EOR 15 9 1918 16 9 1918 1 Fine 3 None None EOR 17 9 1918 17 9 1918 2 Fair 2 None None EOR 18 9 1918 18 9 1918 6 Thick cloud 1 Heavy None EOR 19 9 1918 19 9 1918 4 Overcast, high wind 1 None None EOR 20 9 1918 20 9 1918 6 Low cloud, high wind, showers 2 Light None EOR 21 9 1918 21 9 1918 3 Cloudy, high wind 1 None None EOR 22 9 1918 23 9 1918 6 Low cloud, high wind, rainshowers 1 Light None EOR 24 9 1918 24 9 1918 2 Scattered cloud 3 None None EOR 25 9 1918 25 9 1918 6 Overcast 1 Light None EOR 26 9 1918 27 9 1918 1 Fine 3 None None EOR 28 9 1918 29 9 1918 6 Low cloud 3 Light None EOR 30 9 1918 30 9 1918 6 Low cloud, heavy rainstorms 1 Heavy None EOR 1 10 1918 1 10 1918 2 Scattered cloud 3 None None EOR 2 10 1918 2 10 1918 6 Cloudy 2 Light None EOR 3 10 1918 5 10 1918 2 Fair 2 None None EOR 6 10 1918 7 10 1918 6 Low cloud, high winds, rain 1 Light None EOR 8 10 1918 8 10 1918 6 Low cloud, high winds, rain 2 Light None EOR 9 10 1918 9 10 1918 2 Fair 3 None None EOR 10 10 1918 13 10 1918 6 Low clouds, mist, rain 1 Medium None EOR 14 10 1918 14 10 1918 2 Scattered cloud 3 None None EOR 15 10 1918 17 10 1918 6 Low clouds, thick mist, rain 1 Medium None EOR 18 10 1918 19 10 1918 4 Overcast, very misty 1 None None EOR 20 10 1918 20 10 1918 4 Low cloud, very misty 0 None None EOR 21 10 1918 22 10 1918 4 Low cloud, very misty 1 None None EOR 23 10 1918 23 10 1918 4 Low cloud, very misty 2 None None EOR 24 10 1918 25 10 1918 6 Low cloud, mist, rain 1 Light None EOR 26 10 1918 27 10 1918 3 Low cloud, mist 2 None None EOR 28 10 1918 30 10 1918 2 Fine, low mist 3 None None EOR 31 10 1918 31 10 1918 3 Low cloud, mist 1 None None EOR 1 11 1918 1 11 1918 2 Fair, visibility poor 2 None None EOR 2 11 1918 3 11 1918 6 Low clouds, rain 1 Medium None EOR 4 11 1918 4 11 1918 1 Low mist 3 None None EOR 5 11 1918 8 11 1918 6 Low clouds, rain 1 Medium None EOR 9 11 1918 10 11 1918 1 Fine 2 None None EOR 11 11 1918 11 11 1918 2 Fair, misty 0 None None EOR