blocks|key|2591233|text|我认为这可能是API中的不一致|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2591234|2591235|+http://www.wunderground.com/weather/api/d/docs?d=data/forecast&MR=1，然后转到"Examples“http://api.wunderground.com/api/Your_Key/forecast/q/CA/San_Francisco.json|blockquote|offset|length|2591236|2591237|2591238|提供：|2591239|[...]
"qpf_allday":+{
+++"in":+0.00,
+++"mm":+0.0
},
"qpf_day":+{
+++"in":+0.00,
+++"mm":+0.0
},
"qpf_night":+{
+++"in":+0.00,
+++"mm":+0.0
},
[...]|code-block|syntax|javascript|2591240|所以它也指示了这个单位。|2591241|另外，qpf是|2591242|定量降水预报(简称|2591243|+)是指在特定时间段内，在特定区域内累积的融化降水的预期总量。|2591244|2591245|2591246|来源：https://en.wikipedia.org/wiki/Quantitative_precipitation_forecast|2591247|更新：|2591248|根据(我想说的是“文档”，但不是)这个链接：|2591249|https://apicommunity.wunderground.com/weatherapi/topics/where_can_i_find_a_small_description_of_the_response_fields#reply-9602171-author|2591250|2591251|+qpf+-定量降水预报。在3小时内|2591252|
会有多少降雨？|2591253|entityMap|0|LINK|mutability|MUTABLE|url|http://www.wunderground.com/weather/api/d/docs?d=data/forecast&MR=1|1|http://api.wunderground.com/api/Your_Key/forecast/q/CA/San_Francisco.json|2|https://en.wikipedia.org/wiki/Quantitative_precipitation_forecast|3^0|0|0|1|1V|0|2B|21|1|0|0|0|0|0|0|0|0|0|0|0|3|1T|2|0|0|0|0|3S|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1S|8|@]|9|@$F|1T|G|1U|1|1V]|$F|1W|G|1X|1|1Y]]|A|$]]|$1|H|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|20|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|21|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|22|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|23|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|24|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|25|8|@]|9|@]|A|$]]|$1|W|3|X|5|E|7|26|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|27|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|29|8|@]|9|@$F|2A|G|2B|1|2C]]|A|$]]|$1|12|3|13|5|6|7|2D|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|2E|8|@]|9|@]|A|$]]|$1|16|3|17|5|6|7|2F|8|@]|9|@$F|2G|G|2H|1|2I]]|A|$]]|$1|18|3|-4|5|6|7|2J|8|@]|9|@]|A|$]]|$1|19|3|1A|5|E|7|2K|8|@]|9|@]|A|$]]|$1|1B|3|1C|5|6|7|2L|8|@]|9|@]|A|$]]|$1|1D|3|-4|5|6|7|2M|8|@]|9|@]|A|$]]]|1E|$1F|$5|1G|1H|1I|A|$1J|1K]]|1L|$5|1G|1H|1I|A|$1J|1M]]|1N|$5|1G|1H|1I|A|$1J|1O]]|1P|$5|1G|1H|1I|A|$1J|17]]]]

I think it might be an inconsistency in the API

<blockquote>
 <a href="http://www.wunderground.com/weather/api/d/docs?d=data/forecast&amp;MR=1" rel="nofollow">http://www.wunderground.com/weather/api/d/docs?d=data/forecast&amp;MR=1</a>
 and then over at "Examples"
 <a href="http://api.wunderground.com/api/Your_Key/forecast/q/CA/San_Francisco.json" rel="nofollow">http://api.wunderground.com/api/Your_Key/forecast/q/CA/San_Francisco.json</a>
</blockquote>

gives:

<pre><code>[...]
"qpf_allday": {
 "in": 0.00,
 "mm": 0.0
},
"qpf_day": {
 "in": 0.00,
 "mm": 0.0
},
"qpf_night": {
 "in": 0.00,
 "mm": 0.0
},
[...]
</code></pre>

So it indicates the unit as well.

Also, qpf is 

<blockquote>
 The Quantitative Precipitation Forecast (abbreviated QPF) is the expected amount of melted precipitation accumulated over a specified time period over a specified area.
</blockquote>

Source: <a href="https://en.wikipedia.org/wiki/Quantitative_precipitation_forecast" rel="nofollow">https://en.wikipedia.org/wiki/Quantitative_precipitation_forecast</a>

Update: 
According to (i'd like to say "Docs", but no) this link: 
<a href="https://apicommunity.wunderground.com/weatherapi/topics/where_can_i_find_a_small_description_of_the_response_fields#reply-9602171-author" rel="nofollow">https://apicommunity.wunderground.com/weatherapi/topics/where_can_i_find_a_small_description_of_the_response_fields#reply-9602171-author</a>

<blockquote>
 qpf - quantitative precipitation forecast. How much rain will fall in the 3 hour period 
</blockquote>

blocks|key|5995093|text|我相信，一定是一样的，就像每天的预报一样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5995094|inches|5995095|snow.metric+in+centimeters|unordered-list-item|5995096|
|5995097|qpf.english+in+inches|5995098|5995099|qpf.metric+in+|5995100|snow.english+in+|5995101|snow.english+in+inches|5995102|snow.metric+in+centimeters|5995103|qpf.english+in+inches|5995104|qpf.metric+in+in|5995105|5995106|5995107|5995108|但是，这里有更多的例子：|5995109|"qpf":{
++++"english":"0.02",
++++"metric":"1"
},
"snow":{
++++"english":"0.2",
++++"metric":"5"
}

"qpf":{
++++"english":"0.01",
++++"metric":"0"
},
"snow":{
++++"english":"0.1",
++++"metric":"3"
}

"qpf":{
++++"english":"0.02",
++++"metric":"1"
},
"snow":{
++++"english":"0.0",
++++"metric":"0"
}|code-block|syntax|javascript|5995110|如果我们假设snow.english和qpf.english的单位是英寸，那么：|5995111|0.2+in+=+5+mm和0.1+in+=+2.5+(3)+mm|offset|length|style|CODE|5995112|但|5995113|0.02+in+!=+1+mm和0.01+in+!=+0+mm|5995114|我猜，snow.metric的单位是毫米，qpf.metric的单位是...我不知道。似乎，WUnerground接口在小时预报中返回了错误的雪花和qpf数据。|5995115|请注意：|5995116|5995117|1毫米的降雨量=每平方米1升；|5995118|1英寸的降雨量=每英亩27.154加仑。|5995119|5995120|entityMap^0|0|0|0|0|0|0|0|1|1|1|1|1|0|0|0|0|0|0|0|D|E|J|0|0|0|F|G|F|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1W|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1X|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|1Z|8|@]|9|@]|A|$]]|$1|K|3|H|5|6|7|20|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|21|8|@]|9|@]|A|$]]|$1|N|3|O|5|F|7|22|8|@]|9|@]|A|$]]|$1|P|3|Q|5|F|7|23|8|@]|9|@]|A|$]]|$1|R|3|S|5|F|7|24|8|@]|9|@]|A|$]]|$1|T|3|U|5|F|7|25|8|@]|9|@]|A|$]]|$1|V|3|W|5|F|7|26|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|27|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|29|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|2A|8|@]|9|@]|A|$]]|$1|12|3|13|5|14|7|2B|8|@]|9|@]|A|$15|16]]|$1|17|3|18|5|6|7|2C|8|@]|9|@]|A|$]]|$1|19|3|1A|5|6|7|2D|8|@$1B|2E|1C|2F|1D|1E]|$1B|2G|1C|2H|1D|1E]]|9|@]|A|$]]|$1|1F|3|1G|5|6|7|2I|8|@]|9|@]|A|$]]|$1|1H|3|1I|5|6|7|2J|8|@$1B|2K|1C|2L|1D|1E]|$1B|2M|1C|2N|1D|1E]]|9|@]|A|$]]|$1|1J|3|1K|5|6|7|2O|8|@]|9|@]|A|$]]|$1|1L|3|1M|5|6|7|2P|8|@]|9|@]|A|$]]|$1|1N|3|-4|5|6|7|2Q|8|@]|9|@]|A|$]]|$1|1O|3|1P|5|F|7|2R|8|@]|9|@]|A|$]]|$1|1Q|3|1R|5|F|7|2S|8|@]|9|@]|A|$]]|$1|1S|3|-4|5|6|7|2T|8|@]|9|@]|A|$]]|$1|1T|3|-4|5|6|7|2U|8|@]|9|@]|A|$]]]|1U|$]]

I believe, it must be the same, as for daily forecast:

<ul>
<li>snow.english in inches</li>
<li>snow.metric in centimeters</li>
<li>qpf.english in inches</li>
<li>qpf.metric in millimeters</li>
</ul>

But, here are more examples:

<pre><code>"qpf":{
 "english":"0.02",
 "metric":"1"
},
"snow":{
 "english":"0.2",
 "metric":"5"
}

"qpf":{
 "english":"0.01",
 "metric":"0"
},
"snow":{
 "english":"0.1",
 "metric":"3"
}

"qpf":{
 "english":"0.02",
 "metric":"1"
},
"snow":{
 "english":"0.0",
 "metric":"0"
}
</code></pre>

If we assume that snow.english and qpf.english are in inches, then: 
<code>0.2 in = 5 mm</code> and <code>0.1 in = 2.5 (3) mm</code> 
but 
<code>0.02 in != 1 mm</code> and <code>0.01 in != 0 mm</code> 
I guess, that snow.metric is in millimeters and qpf.metric is in...I don't know. It seems, that WUnerground API returns wrong data for snow and qpf in hourly forecast.

To note:

<ul>
<li>1 mm of rain = 1 liter per square meter; </li>
<li>1 in of rain = 27.154 gallons per acre.</li>
</ul>

I use WUnderground API to retrieve hourly forecast. Here is a part of the json, returned by WUndergound API:

<pre><code>"qpf":{
 "english":"0.02",
 "metric":"1"
},
"snow":{
 "english":"0.0",
 "metric":"0"
}
</code></pre>

And I don't know how to understand english/metric fields for snow and qpf. Are they in inches/millimeters or inches/centimeters or something else? Precipitation is usually specified in cm/mm for the metric system and in inches for imperial. But:

<pre><code>1 cm != 0.02 inches &amp;&amp; 1 mm != 0.02 inches.
</code></pre>

I have no guesses.

English/metric fields for snow and qpf in hourly forecast - WUnderground API

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我使用WUnderground应用程序接口检索每小时的预报。下面是WUndergound接口返回的json的一部分："qpf":{    "english":"0.02",    "metric":"1"},"snow":{    "english":"0.0",    "metric":"0"}我不知道如何理解sno...

问小时预报中雪和qpf的英制/公制字段- WUnderground API
EN

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问小时预报中雪和qpf的英制/公制字段- WUnderground APIEN