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Do Hurricanes Dump More Rain Nowadays?

September 1, 2021

By Paul Homewood

 

One common claim about hurricanes and tropical storms is that they are now dumping more rain because of global warming. However such claims never seem to be backed up by actual data.

David Roth of the National Weather Service published a detailed history of Louisiana hurricanes in 2010, and listed the ten highest daily rainfalls reported from tropical cyclones there:

 

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 https://www.wpc.ncep.noaa.gov/research/lahur.pdf

Clearly there is no evidence from this list that rainfall is becoming more extreme.

We can also check out daily rainfall data from KNMI for New Orleans and the nearby town of Reserve, which have measurements back to 1893 and 1901. Obviously this covers all days, not just TCs, but again there is nothing extreme about recent years at either location.

 

 image

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 http://climexp.knmi.nl/getstations.cgi

13 Comments
  1. Joe Public permalink
    September 1, 2021 11:09 am

    Another scaremongering claim bites the dust.

    It seems indicative that climate changing increases the number of false claims about climate changing.

  2. daver766@yahoo.co.uk permalink
    September 1, 2021 3:35 pm

    Off topic it’s been ‘interesting’ to see how Dr. Michael Mann has been seen squirming around recently denying how he ‘never found the AMO’ yet about thirty years ago he was quite replete in acceptance of his ‘discovery.’ Quite the Man for all Seasons as he must still muse.

    What’s very obvious, tho, and laid out across millenia, are fish catches and numbers. Not just local and sea-wide but oceanic.

    Here’s a link to a great book on it – it’s a Russian-authored from about fifty years ago, ‘Cyclic Climate Changes And Fish Productivity’.

    Click to access Klyashtorin2007,Cyclic%20Climate%20Change_Fish.pdf

    Klondike rusty ships at Ullapool and Lochinver later… ;-0

  3. DaveR permalink
    September 1, 2021 3:42 pm

    Why that e address got published I can maybe guess. You could delete it but wtf

  4. September 1, 2021 5:19 pm

    Probably worth mentioning Claudette in July 1976 at Alvin, TX (just south of Houston).The record U.S.24 hour rainfall of 43 inches was set. Oh right, not a hurricane – just a tropical storm.

    It took Hurricane Harvey 4 days to squeak past that record.

  5. bluecat57 permalink
    September 1, 2021 5:55 pm

    No, but so called climate experts drop more of something.

  6. September 2, 2021 8:44 am

    One claim is that there are more atmospheric blocking patterns, due to human emissions of course – what else could it possibly be, blah blah. Mann et al (2017) blame it on ‘amplified Arctic warming’ (see link). Well they would, wouldn’t they?

    https://www.climatesignals.org/climate-signals/atmospheric-blocking-increase

    Such blocking patterns then make rain-bearing weather systems like hurricanes and storms ‘stall’ if their momentum is hindered by the block. Hence the ‘dumping’ of rain in one place.

    Jet stream meanderings due to lower magnetic activity on the sun, e.g. fewer sunspots in the most recent solar cycles, aren’t on the warmist menu as a cause of increased blocking events.

    • David A permalink
      September 4, 2021 6:32 am

      That’s interesting Old Brew, and how many “CO2 causes more blocking highs” existed BEFORE Harvey hovered?

      Just amazing, all their predictions fail, except the ones they make post the event. ( And it does not take an increase of such events, just a media driven “ The new normal! “ and a published paper is soon printed.

      • David A permalink
        September 4, 2021 6:39 am

        Not to mention a general rule for CAGW propaganda; discover the time frame to a recent rare weather event, and multiply that past occurring years ago number by 10. Example, if the same thing happened 50 years ago, call it a one in 500 years event. (Oh, and always round up to a nearby whole number)

  7. Gerry, England permalink
    September 2, 2021 10:25 am

    There has been a suggestion that the increased number of tall buildings in Houston caused the stalling of Hurricane Harvey. I wonder if there is any research on this or if this would be considered contrary to the ‘climate emergency’ scam as it provides a sensible reason.

    Move from Houston to London and consider the increase in tall buildings there. The City is cramming them in as part of the ‘Eastern Cluster’. Look at Canary Wharf.

  8. Julian Flood permalink
    September 2, 2021 5:19 pm

    Are there records of rain rate, how much rain per minute or whatever. I have a vague memory that clouds short of CCNs rain in a more concentrate way.

    JF

  9. Susan Ewens permalink
    September 3, 2021 9:25 am

    Any comments on the flooding of New York’s basements and subways where people have drowned, Paul? I suppose it is next to impossible to protect these from flash floods but it would be interesting to know of previous such events for comparison. I expect you are working on it this very moment! Thanks for your efforts to keep us properly informed.

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