通用预报接口/v2.5
本文版本：通用预报接口/v2.5，当前稳定版本版本：v2.5，历史版本：v2.2，v2.3，和 v2.4。
授权与认证
请先至彩云开放平台注册，注册后可以获得 token 。
把您的 token 拼到 API 请求的 URL 中，如
https://api.caiyunapp.com/v2.5/TAkhjf8d1nlSlspN/121.6544,25.1552/weather.json
其中 TAkhjf8d1nlSlspN 就是一个共用测试 token 。不要把私有token 告诉任何人！
请求样例
示例1如下
https://api.caiyunapp.com/v2.5/TAkhjf8d1nlSlspN/121.6544,25.1552/weather.json
https://api.caiyunapp.com/v2.5/TAkhjf8d1nlSlspN/121.6544,25.1552/weather.jsonp?callback=MYCALLBACK
token：这里是测试 token ，即 TAkhjf8d1nlSlspN经纬度：经度在前，纬度在后，中间用半角逗号隔开，这里是 121.6544,25.1552返回格式：json 或者 jsonp，jsonp 需提供回调函数名
示例2如下
https://api.caiyunapp.com/v2.5/TAkhjf8d1nlSlspN/121.6544,25.1552/weather?lang=en_US语言选项 lang：默认为简体中文（zh_CN）、繁体中文（zh_TW）、美式英语（en_US）、英式英语（en_GB）
单位制选项 unit：默认为公制（metric）、科学单位体系（SI） 、英制（imperial）
时区偏移秒数 tzshift：用户提供所需时区偏移秒，考虑欧美夏令时，默认东八（tzshift=28800）；例如，用户希望取得印度（东5.5区）习惯定义下的逐日天气，加参数&tzshift=19800（=3600*5.5），然后daily的计算都会做相应处理。
定制返回的起始时间戳 begin：默认为当前utc时间戳，可以用来返回两日内的历史数据
定制返回逐小时预报总小时数 hourlysteps：默认为48小时（包括当前时刻）
定制返回逐日预报总天数 dailysteps：默认为5天（包括今天）
返回周围预警: alert=true (注意小写)
返回结构和说明
realtime分字段含义，请移步：实况接口/v2.5
minutely分字段含义，请移步：逐分钟降水短临预报接口/v2.5
hourly分字段含义，请移步：逐小时预报接口/v2.5
daily分字段含义，请移步：逐日预报接口/v2.5
alert分字段含义，如下：
{ status:ok,
api_version:v2.5,
api_status:active,
unit:metric,
lang:en_US,
result:{
forecast_keypoint:cloudy, clear weather after 23 this midnight,
primary:0,
realtime:{status:ok, ###请参考：实况接口/v2.5
temperature:-1.21,
pres:56320.24,
humidity:0.09,
wind:{direction:284.91,speed:30.12}},
precipitation:{local:{status:ok,intensity:0.0,datasource:gfs}},
cloudrate:0.3,
dswrf:677.9,
visibility:24.1,
skycon:PARTLY_CLOUDY_DAY,
ultraviolet:{index:5.0,desc:Moderat},
comfort:{index:11,desc:Icy wind cold},
pm25:3,
pm10:10.0,
o3:97.0,
no2:2.0,
so2:7.0,
co:0.4,
aqi:10
},
minutely:{status:ok, ###请参考：逐分钟降水短临预报接口/v2.5
precipitation_2h:[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0],
precipitation:[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,
0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0],
datasource:gfs,
description:No snow in the next hour
},
hourly:{status:ok, ###请参考：逐小时预报接口/v2.5
description:cloudy, clear weather after 23 this midnight,
temperature:[{value:-1.21,datetime:2018-11-20 16:00},{value:-0.51,datetime:2018-11-20 17:00}]},
pres:[{value:56320.2411405722,datetime:2018-11-20 16:00},{value:56309.4272949293,datetime:2018-11-20 17:00}],
humidity:[{value:0.09,datetime:2018-11-20 16:00},{value:0.11,datetime:2018-11-20 17:00}],
wind:[{direction:284.91,speed:30.12,datetime:2018-11-20 16:00},{direction:288.24,speed:32.91,datetime:2018-11-20 17:00}],
precipitation:[{value:0.0,datetime:2018-11-20 16:00},{value:0.0,datetime:2018-11-20 17:00}],
cloudrate:[{value:0.3,datetime:2018-11-20 16:00},{value:0.3,datetime:2018-11-20 17:00}],
dswrf:[{value:677.9121814107,datetime:2018-11-20 16:00},{value:596.25984,datetime:2018-11-20 17:00}],
visibility:[{value:24.1,datetime:2018-11-20 16:00},{value:24.1,datetime:2018-11-20 17:00}],
skycon:[{value:PARTLY_CLOUDY_DAY,datetime:2018-11-20 16:00},{value:WIND,datetime:2018-11-20 17:00}],
pm25:[{value:3,datetime:2018-11-20 16:00},{value:0,datetime:2018-11-20 17:00}],
aqi:[{value:10,datetime:2018-11-20 16:00},{value:0,datetime:2018-11-20 17:00}],
},
daily:{status:ok, ###请参考：逐日预报接口/v2.5
temperature:[{date:2018-11-20,max:1.19,avg:-4.35,min:-16.0},{date:2018-11-21,max:2.0,avg:-7.32,min:-18.0}],
pres:[{date:2018-11-20,max:56600.24,avg:56422.06,min:56309.43},{date:2018-11-21,max:56833.63,avg:56653.05,min:56553.63}],
humidity:[{date:2018-11-20,max:0.23,avg:0.14,min:0.09},{date:2018-11-21,max:0.15,avg:0.11,min:0.06}],
wind:[{date:2018-11-20,max:{direction:290.25,speed:35.9},avg:{direction:278.27,speed:19.65},min:{direction:230.17,speed:4.77}},
{date:2018-11-21,max:{direction:276.13,speed:43.0},avg:{direction:262.47,speed:24.54},min:{direction:216.1,speed:12.48}}],
precipitation:[{date:2018-11-20,max:0.0,avg:0.0,min:0.0},{date:2018-11-21,max:0.0,avg:0.0,min:0.0}],
dswrf:[{date:2018-11-20,max:743.7,avg:321.5,min:0.0},{date:2018-11-21,max:748.3,avg:202.3,min:0.0}],
cloudrate:[{date:2018-11-20,max:0.76,avg:0.49,min:0.0},{date:2018-11-21,max:0.15,avg:0.02,min:0.0}],
visibility:[{date:2018-11-20,max:24.1,avg:24.1,min:24.1},{date:2018-11-21,max:24.1,avg:24.1,min:24.1}],
skycon:[{date:2018-11-20,value:PARTLY_CLOUDY_DAY},{date:2018-11-21,value:CLEAR_DAY}],
skycon_08h_20h:[{date:2018-11-20,value:CLEAR_DAY},{date:2018-11-21,value:CLEAR_DAY}]},
skycon_20h_32h:[{date:2018-11-20,value:PARTLY_CLOUDY_NIGHT},{date:2018-11-21,value:CLEAR_NIGHT}],
ultraviolet:[{index:5,desc:Very high,datetime:2018-11-20},{index:5,desc:Very high,datetime:2018-11-21}],
comfort:[{index:13,desc:Dry cold,datetime:2018-11-20},{index:13,desc:Dry cold,datetime:2018-11-21}],
carWashing:[{index:1,desc:Suitable,datetime:2018-11-20},{index:1,desc:Suitable,datetime:2018-11-21}],
coldRisk:[{index:4,desc:Extremely prone,datetime:2018-11-20},{index:4,desc:Extremely prone,datetime:2018-11-21}],
dressing:[{index:8,desc:Extremely cold,datetime:2018-11-20},{index:8,desc:Extremely cold,datetime:2018-11-21}],
pm25:[{date:2018-11-20,max:3,avg:1.12,min:0},{date:2018-11-21,max:1,avg:0.58,min:0}],
aqi:[{date:2018-11-20,max:10,avg:1.25,min:0},{date:2018-11-21,max:0,avg:0.0,min:0}],
astro:[{date:2018-11-20,sunset:{time:19:07},sunrise:{time:08:40}},{date:2018-11-21,sunset:{time:19:07},sunrise:{time:08:41}}],
},
alert:{alert:{status:"ok"
content:{
0:{ request_status: "ok",
source: "国家预警信息发布中心",
county: "无",
province: "江苏省",
regionId: "unknown"
city: "南京市",
code: "1303", ##预警类型code
adcode: "320100",
alertId: "32010041600000_20181130104521",
status: "预警中",
title: "南京市气象台发布霾橙色预警[Ⅱ级/严重]",
description: "南京市气象台2018年11月30日10时41分升级霾黄色预警信号为霾橙色预警信号。目前我市已经出现中度霾，预计未来24小时内霾将持续，请注意防范。"
location: "江苏省南京市",
latlon: {
0: 32.060255,
1: 118.796877
}
pubtimestamp: 1543545921,
}
}
}
},
location:[31.658613,
87.815109]
server_time:1542702509,
tzshift:28800,
}
预警code字段，格式为AABB：
AA取01-16，分别表示：台风、暴雨、暴雪、寒潮、大风、沙尘暴、高温、干旱、雷电、冰雹、霜冻、大雾、霾、道路结冰、森林火灾、雷雨大风，
BB取01-04，分别表示：蓝色、黄色、橙色、红色。
| code | 预警类型 |
|---|---|
| 01BB | 台风 |
| 02BB | 暴雨 |
| 03BB | 暴雪 |
| 04BB | 寒潮 |
| 05BB | 大风 |
| 06BB | 沙尘暴 |
| 07BB | 高温 |
| 08BB | 干旱 |
| 09BB | 雷电 |
| 10BB | 冰雹 |
| 11BB | 霜冻 |
| 12BB | 大雾 |
| 13BB | 霾 |
| 14BB | 道路结冰 |
| 15BB | 森林火灾 |
| 16BB | 雷雨大风 |
暴雪预警信号
http://www.12379.cn/html/ggaq/yjzn/yjxh/2013/01/78327.shtml
天气现象 skycon v2.5
主要天气现象的优先级：冰雹 > 雷阵雨 > 降雪 > 降雨 > 雾 > 沙尘 > 浮尘 > 雾霾 > 大风 > 阴 > 多云 > 晴
| 天气现象 | 代码 | 备注 |
|---|---|---|
| 晴（白天） | CLEAR_DAY | cloudrate < 0.2 |
| 晴（夜间） | CLEAR_NIGHT | cloudrate < 0.2 |
| 多云（白天） | PARTLY_CLOUDY_DAY | 0.8 >= cloudrate > 0.2 |
| 多云（夜间） | PARTLY_CLOUDY_NIGHT | 0.8 >= cloudrate > 0.2 |
| 阴 | CLOUDY | cloudrate > 0.8 |
| 轻度雾霾 | LIGHT_HAZE | PM2.5 100~150 |
| 中度雾霾 | MODERATE_HAZE | PM2.5 150~200 |
| 重度雾霾 | HEAVY_HAZE | PM2.5 > 200 |
| 小雨 | LIGHT_RAIN | |
| 中雨 | MODERATE_RAIN | |
| 大雨 | HEAVY_RAIN | |
| 暴雨 | STORM_RAIN | |
| 雾 | FOG | 能见度低，湿度高，风速低，温度低 |
| 小雪 | LIGHT_SNOW | |
| 中雪 | MODERATE_SNOW | |
| 大雪 | HEAVY_SNOW | |
| 暴雪 | STORM_SNOW | |
| 浮尘 | DUST | aqi > 150，pm10 > 150，湿度 < 30%，风速 < 6 m/s |
| 沙尘 | SAND | aqi > 150，pm10 > 150，湿度 < 30%，风速 > 6 m/s |
| 大风 | WIND | |
| 雷阵雨 | THUNDER_SHOWER | 闪电+降水 |
| 冰雹 | HAIL | 闪电+降水+其他 |
| 雨夹雪 | SLEET |
雾霾类(HAZE）天气现象（skycon）分三个等级：
| 轻度雾霾 | 中度雾霾 | 重度雾霾 |
| AQI > 100 | AQI > 150 | AQI > 200 |
空气污染的自然语言描述air_quality: description字段，根据AQI有六个等级划分：
| 缺数据 missing | 优 good | 良 satisfactory | 轻度污染 moderate | 中度污染 unhealthy | 重度污染 very poor | 严重污染 hazardous |
| 无测站国家和位置 | 0~50 | 51~100 | 101~150 | 151~200 | 201~300 | >300 |
生活指数
1.目前支持的生活指数（life_index）包括：紫外线（ultraviolet）、舒适度（comfort）、洗车（carWashing）、感冒（coldRisk）、（穿衣指数（dressing），不建议继续使用，请使用舒适度）:
紫外线（ultraviolet）实况 |
||
|---|---|---|
| level | desc | 自然语言描述 |
| 0 | None | 无（夜间） |
| 1 | Weak | 很弱 |
| 2 | Weak | 很弱 |
| 3 | Low | 弱 |
| 4 | Low | 弱 |
| 5 | Moderate | 中等 |
| 6 | Moderate | 中等 |
| 7 | High | 强 |
| 8 | High | 强 |
| 9 | Very High | 很强 |
| 10 | Very High | 很强 |
| 11 | Extreme | 极强 |
紫外线（ultraviolet）逐日预报（午间时段，10：00AM~14:00PM） |
||
|---|---|---|
| level | desc | 自然语言描述 |
| 0 | None | 无（夜间） |
| 1 | Weak | 最弱 |
| 2 | Low | 弱 |
| 3 | Moderate | 中等 |
| 4 | High | 强 |
| 5 | Very high | 很强 |
舒适度（comfort）实况和逐日预报 |
||
|---|---|---|
| level | desc | 自然语言描述 |
| 0 | Sticky | 闷热 |
| 1 | Extremely hot | 酷热 |
| 2 | Very hot | 很热 |
| 3 | Hot | 热 |
| 4 | Warm | 温暖 |
| 5 | Comfort | 舒适 |
| 6 | Cool | 凉爽 |
| 7 | Cold | 冷 |
| 8 | Very cold | 很冷 |
| 9 | Freezing | 寒冷 |
| 10 | Frigid | 极冷 |
| 11 | Icy | 刺骨的冷 |
| 12 | Clammy | 湿冷 |
| 13 | Dry cold | 干冷 |
洗车（carWashing）逐日预报 |
||
|---|---|---|
| level | desc | 自然语言描述 |
| 1 | Suitable | 适宜 |
| 2 | More appropriate | 较适宜 |
| 3 | Less appropriate | 较不适宜 |
| 4 | Unfit | 不适应 |
感冒（coldRisk）逐日预报 |
||
|---|---|---|
| level | desc | 自然语言描述 |
| 1 | Less prone | 少发 |
| 2 | Easily prone | 较易发 |
| 3 | Prone | 易发 |
| 4 | Extremely prone | 极易发 |
支持的单位制
1.目前支持的单位制包括：科学单位体系（SI，大写）、英制（imperial）、公制（不带参数&unit默认公制，公制还包括: metric:v1和metric:v2）:
单位制 要素
|
SI（科学单位体系） | imperial（英制） | metric:v1（公制v1） | metric:v2（公制v2） | default metric(默认公制) |
|---|---|---|---|---|---|
| 实况降水量 | 米/秒(meter/sec) | 英寸/小时(in/hr) | 雷达降水强度（0~1） | 毫米/小时(mm/hr) | 雷达降水强度（0~1） |
| 逐分钟降水短临预报降水量 | 米/秒(meter/sec) | 英寸/小时(in/hr) | 雷达降水强度（0~1） | 毫米/小时(mm/hr) | 雷达降水强度（0~1） |
| 逐小时预报降水量 | 米/秒(meter/sec) | 英寸/小时(in/hr) | 雷达降水强度（0~1） | 毫米/小时(mm/hr) | 毫米/小时(mm/hr) |
| 逐日预报降水量 | 米/秒(meter/sec) | 英寸/小时(in/hr) | 雷达降水强度（0~1） | 毫米/小时(mm/hr) | 毫米/小时(mm/hr) |
| 距离 | 米(m) | 英里(mi) | 公里(km) | 公里(km) | 公里(km) |
| 温度 | 开尔文(K) | 华氏度(℉) | 摄氏度(℃) | 摄氏度(℃) | 摄氏度(℃) |
| 气压 | 帕(Pa) | 帕(Pa) | 帕(Pa) | 帕(Pa) | 帕(Pa) |
| 相对湿度 | 0~1 | 0~1 | 0~1 | 0~1 | 0~1 |
| 风向 | 从北顺时针(0~360°) | 从北顺时针(0~360°) | 从北顺时针(0~360°) | 从北顺时针(0~360°) | 从北顺时针(0~360°) |
| 风速 | 米/秒（m/s） | 英里/小时（mi/hr） | 公里/小时（km/hr） | 公里/小时（km/hr） | 公里/小时（km/hr） |
| 云量 | 0~1 | 0~1 | 0~1 | 0~1 | 0~1 |
| 能见度 | 米(m) | 英里(mi) | 公里(km) | 公里(km) | 公里(km) |
unit=metric:v1时，所有类型中precipitation的单位都是：雷达降水强度（0~1）
unit=metric:v2时，所有类型中precipitation的单位都是：毫米/小时(mm/hr)
2.判断降水等级:
- 带参数&unit=metric:v1，请求实况、分钟级、逐小时和逐日降水强度，单位都为雷达降水强度（0 ~ 1）；
- 雷达降水强度（0 ~ 1）判断降水等级：0.03~0.25 小雨(雪)， 0.25~0.35 中雨(雪)， 0.35~0.48大雨(雪)， >0.48 暴雨(雪)；
- v2.4版本中，本地存在降水时，可以根据skycon（存在于realtime、hourly、daily字段），和skycon_08h_20h和skycon_20h_32h（存在于daily字段），中的：LIGHT_RAIN, MODERATE_RAIN, HEAVY_RAIN, STORM_RAIN(LIGHT_SNOW, MODERATE_SNOW, HEAVY_SNOW，STORM_SNOW)直接获取降水等级
- 大暴雨(雪)和特大暴雨(雪)，需要根据24小时累计公制降水量（mm/24hr）来判断，研发中...
