147 12 1 1 1917 1 1 1917 6 Bitterly cold, storms, snow. No Service flying 0 Heavy Heavy EOR 2 1 1917 2 1 1917 6 Bitterly cold, snowstorms restrict operations 1 Heavy Heavy EOR 3 1 1917 3 1 1917 6 Bitterly cold, storms, snow. No Service flying 0 Heavy Heavy EOR 4 1 1917 22 1 1917 6 Bitterly cold. Clouds, fog, snow hamper artillery cooperation 1 Heavy Heavy EOR 23 1 1917 3 2 1917 1 Bitterly cold. Sunny and Clear 1 None Heavy EOR 4 2 1917 5 2 1917 6 Bitterly cold. Clouds, fog, snow hamper artillery cooperation 1 Heavy Heavy EOR 6 2 1917 10 2 1917 1 Bitterly cold. Sunny and Clear 1 None Heavy EOR 11 2 1917 11 2 1917 6 Heavy clouds, fog, snow hamper artillery cooperation 1 Heavy Heavy EOR 12 2 1917 12 2 1917 6 Heavy clouds, fog, snow restrict operations 0 Heavy Heavy EOR 13 2 1917 14 2 1917 1 Cold. Sunny and Clear 1 None Heavy EOR 15 2 1917 17 2 1917 6 Low clouds, drizzle, mist 1 Light Medium EOR 18 2 1917 24 2 1917 6 Heavy clouds, rain, fog cancel operations 0 Heavy Light EOR 25 2 1917 27 2 1917 6 Heavy clouds, fog, rain hamper artillery cooperation 1 Heavy None EOR 28 2 1917 28 2 1917 6 Heavy clouds, fog, rain. No Service flying 0 Heavy None EOR 1 3 1917 4 3 1917 6 Heavy clouds, fog, rain hamper artillery cooperation 1 Heavy None EOR 5 3 1917 5 3 1917 6 Thick clouds, heavy snow. No Service flying 0 Heavy Heavy EOR 6 3 1917 6 3 1917 6 Heavy clouds, fog, rain. 1 Heavy Light EOR 7 3 1917 8 3 1917 6 Heavy clouds, gales, rain cancel operations 0 Heavy None EOR 9 3 1917 9 3 1917 5 Thunderheads, sunny breaks 1 None None EOR 10 3 1917 10 3 1917 6 Heavy clouds, rain cancel operations 0 Heavy None EOR 11 3 1917 11 3 1917 5 Towering cumulus, sunny breaks 1 None None EOR 12 3 1917 14 3 1917 6 Heavy clouds, wind, rain hamper artillery cooperation 1 Heavy None EOR 15 3 1917 17 3 1917 3 Towering cumulus, thunderheads, sunny breaks 1 None None EOR 18 3 1917 19 3 1917 2 Cumulonimbus, high winds 1 None None EOR 20 3 1917 20 3 1917 6 Heavy cloud, high winds, rain cancel operations 0 Heavy None EOR 21 3 1917 22 3 1917 6 Heavy clouds, fog, snow. 1 Heavy Medium EOR 23 3 1917 26 3 1917 5 Towering cumulus, thunderheads, sunny breaks 1 None Light EOR 27 3 1917 27 3 1917 6 Heavy cloud, snowstorms cancel operations 0 Heavy Medium EOR 28 3 1917 29 3 1917 6 Heavy clouds, wind, rain hamper artillery cooperation 1 Heavy None EOR 30 3 1917 1 4 1917 6 Thunderstorms, wind, rain hamper artillery cooperation 1 Heavy None EOR 2 4 1917 2 4 1917 6 Towering cumulus, snowstorms, sunny breaks 1 Light Light EOR 3 4 1917 6 4 1917 6 Heavy clouds, snow, wind, rain hamper artillery cooperation 1 Heavy Light EOR 7 4 1917 8 4 1917 5 Cumulonimbus, high winds 1 None None EOR 9 4 1917 10 4 1917 6 Heavy clouds, blizzards, snow, high winds 1 Heavy Medium EOR 11 4 1917 11 4 1917 5 Cumulonimbus, high winds, afternoon snow 1 Light Light EOR 12 4 1917 12 4 1917 6 Heavy clouds, blizzards, snow, wind 1 Heavy Medium EOR 13 4 1917 13 4 1917 3 Towering cumulus, sunny breaks 1 None Light EOR 14 4 1917 14 4 1917 5 Rain and snowstorms at intervals 1 Medium Light EOR 15 4 1917 16 4 1917 3 Towering cumulus, sunny breaks 1 None Light EOR 17 4 1917 19 4 1917 6 Thunderstorms, wind, rain cancel operations 0 Heavy None EOR 20 4 1917 28 4 1917 3 Towering cumulus, sunny breaks, wind 1 None None EOR 29 4 1917 1 5 1917 2 Cumulonimbus, sunny breaks 1 None None EOR 2 5 1917 6 5 1917 1 Hot, clear blue skies, high winds 1 None None EOR 7 5 1917 7 5 1917 3 Towering cumulus, mist, sunny breaks, Scattered cloud 1 None None EOR 8 5 1917 15 5 1917 2 Very hot, hazy. High overcast 1 None None EOR 16 5 1917 17 5 1917 6 Thunderstorms, wind, rain severely restrict operations 1 Heavy None EOR 18 5 1917 18 5 1917 2 Good flying conditions, some passing clouds 2 None None EOR 19 5 1917 19 5 1917 3 Becoming cloudy, rain arriving this evening 1 None None EOR 20 5 1917 20 5 1917 6 Steady rain all day limits flying 1 Medium None EOR 21 5 1917 21 5 1917 4 Dull weather, solid clouds 1 None None EOR 22 5 1917 24 5 1917 6 Rain for the next few days will severely restrict most operations 1 Heavy None EOR 25 5 1917 28 5 1917 1 Period of hot, dry weather. Few clouds 2 None None EOR 29 5 1917 29 5 1917 5 Slightly cooler and windy, with variably cloudy conditions 2 None None EOR 30 5 1917 30 5 1917 4 Low clouds, hot 2 None None EOR 31 5 1917 2 6 1917 2 Broken clouds, still warm 2 None None EOR 3 6 1917 3 6 1917 5 Variably cloudy and windy 1 None None EOR 4 6 1917 5 6 1917 2 Widely scattered clouds 2 None None EOR 6 6 1917 6 6 1917 6 Scattered heavy rain showers 1 Heavy None EOR 7 6 1917 9 6 1917 3 Warm period, some passing clouds 3 None None EOR 10 6 1917 10 6 1917 5 Variably cloudy, storms arriving late 2 None None EOR 11 6 1917 11 6 1917 3 Mostly calm day 3 None None EOR 12 6 1917 12 6 1917 6 Rainy most of the day, some improvement later 2 Light None EOR 13 6 1917 14 6 1917 2 Fine weather for flying. Keep a lookout for the enemy at all times 2 None None EOR 15 6 1917 15 6 1917 6 Rainy and unusually warm 1 Medium None EOR 16 6 1917 18 6 1917 1 Clear weather, very hot 2 None None EOR 19 6 1917 22 6 1917 6 Thunderstorms, towering cumulus, sunny breaks 1 Medium None EOR 23 6 1917 26 6 1917 3 Towering cumulus, sunny breaks 1 None None EOR 27 6 1917 29 6 1917 1 Sunny and Clear 1 None None EOR 30 6 1917 1 7 1917 6 A thoroughly wet day 1 Medium None EOR 2 7 1917 3 7 1917 5 Sunny, towering cumulus 1 None None EOR 4 7 1917 5 7 1917 6 Unsettled, intermittent rain 1 Medium None EOR 6 7 1917 7 7 1917 2 Sunny, scattered cloud 1 None None EOR 8 7 1917 8 7 1917 6 Heavy thunderstorms, overcast 1 Medium None EOR 9 7 1917 9 7 1917 6 Thunderstorms, wind, rain cancel operations 0 Heavy None EOR 10 7 1917 13 7 1917 2 Sunny, scattered cloud 1 None None EOR 14 7 1917 18 7 1917 6 Severe thunderstorms 1 Medium None EOR 19 7 1917 19 7 1917 6 Thunderstorms, wind, rain restrict operations 0 Heavy None EOR 20 7 1917 24 7 1917 3 Extremely hot, cumulonimbus, hazy 1 None None EOR 25 7 1917 25 7 1917 5 Intermittent rain 1 Light None EOR 26 7 1917 30 7 1917 3 Sunny, towering cumulus, wind 1 None None EOR 31 7 1917 31 7 1917 6 Cumulonimbus 1 Medium None EOR 1 8 1917 3 8 1917 6 Constant rain squalls and very strong winds. No flying 0 Heavy None EOR 4 8 1917 4 8 1917 6 Thunderstorms, wind, rain restrict operations 0 Heavy None EOR 5 8 1917 14 8 1917 2 Hot, cumulonimbus, hazy 1 None None EOR 15 8 1917 15 8 1917 6 Violent thunderstorms 1 Medium None EOR 16 8 1917 17 8 1917 2 Sunny, towering cumulus 1 None None EOR 18 8 1917 21 8 1917 6 Hazy days, scattered thunderheads, occasional rain 1 Light None EOR 22 8 1917 23 8 1917 5 Hot, cumulonimbus, hazy 3 None None EOR 24 8 1917 24 8 1917 6 Thunderstorms, wind, rain restrict operations 0 Heavy None EOR 25 8 1917 27 8 1917 3 Hot, cumulonimbus, hazy, winds 1 None None EOR 28 8 1917 29 8 1917 6 Thunderstorms, high wind, rain restrict operations 0 Heavy None EOR 30 8 1917 30 8 1917 5 Hot, cumulonimbus, hazy, winds 3 None None EOR 1 9 1917 3 9 1917 6 Thunderstorms, winds, rain hamper artillery cooperation 0 Heavy None EOR 4 9 1917 4 9 1917 5 Sunny, towering cumulus 1 None None EOR 5 9 1917 7 9 1917 6 Thunderstorms, winds, rain hamper artillery cooperation 0 Heavy None EOR 8 9 1917 8 9 1917 6 Heavy cloud, wind, rain, mist cancel operations 0 Heavy None EOR 9 9 1917 13 9 1917 5 Heavy mist, low cloud interfere with artillery cooperation 0 None None EOR 14 9 1917 16 9 1917 6 Intermittent rain, low clouds, wind 1 Light None EOR 17 9 1917 20 9 1917 6 Storms, high wind, rain 0 Heavy None EOR 21 9 1917 24 9 1917 5 Thick broken cloud, high winds 1 None None EOR 25 9 1917 29 9 1917 3 Thick broken cloud, mist 1 None None EOR 30 9 1917 2 10 1917 2 Sunny, high scattered cloud 1 None None EOR 3 10 1917 10 10 1917 6 Thick low cloud, high wind, rain hamper artillery cooperation 1 Heavy None EOR 11 10 1917 11 10 1917 3 Heavy cumulonimbus, high winds 1 None None EOR 12 10 1917 13 10 1917 6 Thick low cloud, high wind, rain hamper artillery cooperation 1 Heavy None EOR 14 10 1917 18 10 1917 5 Cold, sunny, towering cumulus 1 None None EOR 19 10 1917 19 10 1917 6 Thick low cloud, mist prevents much work being done. 1 Light None EOR 20 10 1917 21 10 1917 3 Sunny, towering cumulus. Low haze hampers artillery cooperation 1 None None EOR 22 10 1917 23 10 1917 6 Rain and thick mist prevents much work being done. 1 Heavy None EOR 24 10 1917 24 10 1917 6 Strong winds, very thick mist 1 Light None EOR 25 10 1917 25 10 1917 6 Rain and violent gales prevents much Service flying 1 Heavy None EOR 26 10 1917 26 10 1917 6 Storms, heavy cloud cover, strong Easterlies 1 Medium None EOR 27 10 1917 29 10 1917 5 Thick low clouds, strong westerlies 1 None None EOR 30 10 1917 30 10 1917 6 Cold. Rain - not much work done 1 Heavy None EOR 31 10 1917 31 10 1917 2 Sunny, scattered cloud, low mist hampers close support 1 None None EOR 1 11 1917 1 11 1917 6 Rain and heavy mist over the battlefield 1 Medium None EOR 2 11 1917 2 11 1917 6 Rain and thick mist prevent operations 0 Heavy None EOR 3 11 1917 3 11 1917 6 Rain and thick mist prevents much Service flying 1 Heavy None EOR 4 11 1917 5 11 1917 1 Sunny, cloudless skies 1 None None EOR 6 11 1917 11 11 1917 6 Cold, gale force winds. Squalls, heavy cloud 1 Heavy None EOR 12 11 1917 12 11 1917 1 Cold, sunny 1 None None EOR 13 11 1917 14 11 1917 6 Heavy cloud, mist restrict operations 1 Light None EOR 15 11 1917 15 11 1917 5 High winds 1 None None EOR 16 11 1917 20 11 1917 4 Low clouds and mist prevent most flying 1 None None EOR 21 11 1917 25 11 1917 6 Cold, gale force winds. Low cloud over the battlefield 1 Heavy None EOR 26 11 1917 28 12 1917 6 Low cloud, showers. Strong winds 1 Light None EOR 29 11 1917 1 12 1917 3 Heavy cumulonimbus, high winds 1 None None EOR 2 12 1917 3 12 1917 1 Cold, clear skies. Brisk winds 1 None None EOR 4 12 1917 4 12 1917 6 Snow, thick ground mist 1 Light Medium EOR 5 12 1917 6 12 1917 5 Cold. Bright blue skies. West wind 1 None Light EOR 7 12 1917 8 12 1917 3 Thick cumulus 1 None None EOR 9 12 1917 9 12 1917 6 Thick mist, rain prevent operations 0 Light None EOR 10 12 1917 12 12 1917 6 Thick mist 1 Light None EOR 13 12 1917 14 12 1917 6 Thick ground mist, low clouds restrict operations 1 Medium None EOR 15 12 1917 15 12 1917 6 Thick ground mist, broken cloud 1 Light None EOR 16 12 1917 16 12 1917 6 Snow, fog 1 Light Light EOR 17 12 1917 17 12 1917 6 Heavy snow 1 Heavy Heavy EOR 18 12 1917 19 12 1917 5 Clear, cold. High East wind 1 None Heavy EOR 20 12 1917 21 12 1917 6 Impenetrable fog, low cloud prevent operations 0 Heavy Medium EOR 22 12 1917 23 12 1917 5 Thick low cloud 1 None Light EOR 24 12 1917 24 12 1917 6 Thick mist and drizzle all day 1 Light None EOR 25 12 1917 25 12 1917 6 Heavy snow, blizzards. Little Service flying 1 Heavy Heavy EOR 26 12 1917 27 12 1917 6 Snow-storms, high winds 1 Heavy Heavy EOR 28 12 1917 28 12 1917 5 Solid cumulonimbus 1 None Heavy EOR 29 12 1917 29 12 1917 5 Low cloud, mist 1 None Heavy EOR 30 12 1917 30 12 1917 6 Snow, solid overcast prevent Service flying 0 Heavy Heavy EOR 31 12 1917 31 12 1917 6 Low cloud, snow, mist restrict Service flying 1 Light Heavy EOR