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Hurricane Irma Reaches 185 MPH, Trailing Only Allen As Strongest Atlantic Storm On Record (arstechnica.com)

An anonymous reader quotes a report from Ars Technica: We are quickly running out of adjectives to describe the destructive potential of Hurricane Irma. As of 2pm ET on Tuesday, the National Hurricane Center upgraded the storm's sustained winds to 185mph. This is near-record speed for a storm in the Atlantic basin, which includes the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico. Such high, sustained winds tie Irma for the second-strongest storm on record in the Atlantic, along with Hurricane Wilma (2005), Hurricane Gilbert (1998), and the 1935 Florida Keys hurricane. Only Hurricane Allen, which reached 190 mph in 1980 before striking a relatively unpopulated area of Texas, reached a higher wind speed. Globally, the all-time record for hurricanes is held by Patricia, which reached a staggering 215 mph in the Pacific Ocean in 2015. Although sustained winds capture the most public attention, meteorologists generally measure the intensity of a storm based upon central pressures, which are considerably lower than sea-level pressure on Earth, 1,013 millibars. Typhoon Tip, in 1979, holds this record at 870 millibars. For now, at least, Irma has a relatively high central pressure of 927 millibars. Why the storm has such an odd wind-speed-pressure relationship isn't entirely clear. According to the National Hurricane Center, Irma is expected to bring catastrophic winds and potential storm surges to the U.S. Virgin Islands, Puerto Rico, Dominican Republic, and the UK territory of Turks and Caicos this week. The Florida Keys could get hit by late Saturday night or Sunday.

6 of 318 comments (clear)

  1. Re:Winter is coming by whoever57 · · Score: 4, Informative

    I guess to you it's just an "inconvenient truth" how long it's been since we've even had any serious hurticanes hit the US.

    I think that the prediction is actually for fewer storms, but greater magnitude.....
    C. Model simulations of greenhouse warming influence on Atlantic hurricanes ....
    Our regional model projects that Atlantic hurricane and tropical storms are substantially reduced in number, for the average 21st century climate change projected by current models, but have higher rainfall rates, particularly near the storm center."

    I guess you will also have an explanation for the fact that there is less ice in the Arctic?

    Summary: climate change denier detected.

    --
    The real "Libtards" are the Libertarians!
  2. Re:Two storms of unusual magnitude .... by whoever57 · · Score: 5, Informative

    First it was Global Cooling until that fell flat on it's face.

    What fell flat on its face is your knowledge of history. In fact, scientists did not predict cooling: that was only the media.

    However, these are media articles, not scientific studies. A survey of peer reviewed scientific papers from 1965 to 1979 show that few papers predicted global cooling (7 in total). Significantly more papers (42 in total) predicted global warming (Peterson 2008). The large majority of climate research in the 1970s predicted the Earth would warm as a consequence of CO2. Rather than 1970s scientists predicting cooling, the opposite is the case.

    Let me suggest that you crawl back under your bridge.

    --
    The real "Libtards" are the Libertarians!
  3. Both storms were usual in magnitude by Solandri · · Score: 4, Informative
    Quoting the wiki page on Atlantic hurricane seasons:

    On average, 10.1 named storms occur each season, with an average of 5.9 becoming hurricanes and 2.5 becoming major hurricanes (Category 3 or greater).

    So far this season, we've had 9 named storms, 4 of which have become hurricanes, 2 major hurricanes. While we've still got 3 more months, but the end of September is the end of the peak, with a few storms in October, and almost none in November. Predictions at the start of the season were for about 14 named storms, 6-7 hurricanes, and 3 major hurricanes. So we're on track for a really boring, average year in terms of Atlantic hurricanes.

    The only reason both storms seem unusual is because until Harvey, the U.S. hadn't been hit by a major hurricane since 2005. Contrary to the doom and gloom scenario painted by climate change alarmists after Katrina, Rita, and Wilma, who warned us that 2005 was going to become the new norm for Atlantic hurricanes. Sometimes outliers are nothing more than outliers.

  4. Difficult to forecast Irma by Anonymous Coward · · Score: 5, Informative

    This is a really difficult forecast for a number of reasons.

    Most major hurricanes don't just gradually intensify to a category 3 or 4, let alone well into category 5. They undergo periods of rapid intensification, due to bursts of thunderstorms in the core of the storm with lots of hot towers developing. Harvey did this before making landfall in Texas. Irma has done this twice. However, forecasting when this will happen is generally beyond the current limits of meteorology. The Ships statistical model only called for a gradual intensification of Irma. Some of the dynamical models like the GFS, HWRF, and HMON did predict rapid intensification. However, they have been predicting that it was imminent for days, without actually happening. It's obvious when rapid intensification is occurring because the hot towers show up in infrared satellite imagery. But there's very little skill in predicting rapid intensification before it starts. It's related somewhat to ocean heat content, but it doesn't explain when there's high ocean heat content but rapid intensification doesn't occur. Most major hurricanes do undergo rapid intensification at some point, and it's very hard to predict.

    It's very likely that Irma will take a hard right turn in a few days and move north. There is very good agreement among the models that this will occur. However, it's not clear exactly when this will happen. If it happens sooner, Irma could miss Florida entirely and move toward the Carolinas. This isn't especially likely, but it's possible. It could turn north a bit later and move across the Florida Keys into South Florida. There are also model solutions that bring Irma into the eastern Gulf of Mexico. This last situation also isn't especially likely, but is definitely possible. This doesn't include true outlier model forecasts, such as missing the United States entirely. Irma will also get close to Cuba, and moving over mountainous land for an extended period of time could wake Irma substantially. It just isn't clear yet whether this will happen or not. Hurricanes are steered by winds in the upper atmosphere around areas of high pressure (ridges) and low pressure (troughs). There are currently special upper air observations being taken every six hours in the central United States to help with forecasting Irma. There's an upper level trough over its area, that will interact with a ridge to the east, which has an impact on steering Irma. It's not clear whether these extra observations are helping with the forecasting of Irma, but it's definitely possible. Maybe these types of special observations well over a thousand miles from a storm have been taken before, but I don't recall seeing it. It's a very interesting idea for sure, to try to help improve forecasting of the storm's track in the 3-7 day time frame. Even though we know Irma will very likely take a hard turn to the north, relatively small differences in where this occurs will have a big difference on the impacts to the United States. And this is not at all unusual in hurricane forecasting.

    Despite running tens of different computer models every six hours, it's really hard to predict where the storm is going to go. And yet the track forecasting has improved quite a bit over the past couple of decades, definitely outpacing intensity forecasts.

  5. Re:Two storms of unusual magnitude .... by cirby · · Score: 4, Informative

    Yeah, but when the prediction in the late 1990s was "we're going to have several large, Category 4, landfalling hurricanes hit the East Coast each year due to global warming," the relative drought in them for the last decade or so is pretty embarrassing for the people trying to pretend otherwise.

    There isn't an upward trend, overall. If anything, we've been seeing fewer such nasty storms than there were during the first half of the 20th century.

  6. Re:Fixed link by Anonymous Coward · · Score: 2, Informative

    I know that nobody is going to see this, but it should still be pointed out..

    Your "link" is just a web serach. Looking at the actual articles linked, and going beyond the news outlet articles that talk about it to the actual papers, they do indeed say the same thing. In fact, it looks like the news outlets are using technically correct wording, but it's misleading, something like: "There will be more, powerful storms" as in "There will be a larger number of powerful storms" not that there will be an increase in storms overall.

    Adding to this, the actual NOAA explicitly states this :

    https://www.gfdl.noaa.gov/global-warming-and-hurricanes/

    Our regional model projects that Atlantic hurricane and tropical storms are substantially reduced in number, for the average 21st century climate change projected by current models, but have higher rainfall rates, particularly near the storm center. The average intensity of the storms that do occur increases by a few percent (Figure 6), in general agreement with previous studies using other relatively high resolution models, as well as with hurricane

    You can even check that this hasn't recently changed by using the wayback machine:
    https://web.archive.org/web/20120204071418/https://www.gfdl.noaa.gov/global-warming-and-hurricanes/

    Frankly, I've learned to be highly skeptical when I see Superkendall posts. They're usually those types of posts that seem correct at first glance, but turn out to be a little disingenuous with a little research.