Originally posted by Jane Coram
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We are working already from the base description given that led to Fisherman's article, the wording of which describing 'rain affected the London area after midnight.' I have already argued that this is too general. And even in this report the information is too general. We have rainfall for Brixton and Regent's Park, but neither of these prove whether it was raining in Dorset Street at any given time, or the surrounding area. So that's problematic in itself. This report states that two areas of London experienced the days of 8th/9th completely differently: on 8th November it did not rain at all in Brixton but there were 7.1 mm on the 9th. Interestingly, it was the other way round in Regent's Park; no rain recorded on the 9th, but 5.1 mm on the 8th. So we already see, trying to prove it was raining in the London area only on the 9th and not the 8th and therefore concluding that somebody could have engaged in walking around on a dry night and not a wet one is not possible...since the data shows BOTH nights experiencing some rainfall but on different nights.
Now look at the amounts. How much is 7.1 mm and 5.1 mm. Does that constitute a little, or a lot of rain in meterological terms? We always knew there were showers on 9th November around Dorset Street because some of the witnesses specifically refer to the rain and there were wet clothes drying in Kelly's room. So the issue is not whether it rained at all, but whether it was raining to such an extent that it would render Hutchinson's claim to have spent the night walking the streets implausible.
My first port of call to get some general information was wiki so i am not sure exactly how much store can be put on the figures, but I may consider consulting a proper meterologist if anyone thinks it necessary, or perhaps someone else could?
Rainfall intensity is classified according to the rate of precipitation:
Light rain — when the precipitation rate is < 2.5 millimetres (0.098 in) per hour
Moderate rain — when the precipitation rate is between 2.5 millimetres (0.098 in) - 7.6 millimetres (0.30 in) or 10 millimetres (0.39 in) per hour[91][92]
Heavy rain — when the precipitation rate is > 7.6 millimetres (0.30 in) per hour,[91] or between 10 millimetres (0.39 in) and 50 millimetres (2.0 in) per hour[92]
Violent rain — when the precipitation rate is > 50 millimetres (2.0 in) per hour[92]
Light rain — when the precipitation rate is < 2.5 millimetres (0.098 in) per hour
Moderate rain — when the precipitation rate is between 2.5 millimetres (0.098 in) - 7.6 millimetres (0.30 in) or 10 millimetres (0.39 in) per hour[91][92]
Heavy rain — when the precipitation rate is > 7.6 millimetres (0.30 in) per hour,[91] or between 10 millimetres (0.39 in) and 50 millimetres (2.0 in) per hour[92]
Violent rain — when the precipitation rate is > 50 millimetres (2.0 in) per hour[92]
I'd also like to ask what is meant by 'general rain'. This is not a specific enough term to use when discussing weather conditions. There is no such thing as 'general rain' unless perhaps he is away fighting in Afghanistan somewhere (salutes). 'General rain not showers' makes no sense when we are talking about total levels of 5.1 and 7.1 mm. I do not think it possible that there could have been rain all evening, only totalling an amount of 5.1 and 7.1 mm. According to wiki,
Raindrops have sizes ranging from 0.1 millimetres (0.0039 in) to 9 millimetres (0.35 in) mean diameter, above which they tend to break up
Also this report contradicts itself. In the beginning it reports that:
The overnight period in London (8th into the 9th) was overcast and rather gloomy with outbreaks of rain.
Here is a dictionary definition of 'outbreak':
Definition of OUTBREAK
1a : a sudden or violent increase in activity or currency <the outbreak of war
>
b : a sudden rise in the incidence of a disease <an outbreak of measles>
c : a sudden increase in numbers of a harmful organism and especially an insect within a particular area <an outbreak of locusts>
1a : a sudden or violent increase in activity or currency <the outbreak of war
>
b : a sudden rise in the incidence of a disease <an outbreak of measles>
c : a sudden increase in numbers of a harmful organism and especially an insect within a particular area <an outbreak of locusts>
It is clear therefore that outbreaks of rain are showers, and this is stated in the report, and substantiated by the actual levels of rainwater given as measurements for both nights in both areas. What the general rain comment is all about I have no idea. Is there any way we can get back in touch with Mr Jebson to clarify exactly what 'general rain' is and why he said that at the end of the report when the body of the report seems to contradict that conclusion?
Jen x
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