By Jo Farrow
Currently at W for the central Pacific naming, they do not return to A at the beginning of each season but just continue through the whole list. The red dot Johnston Atoll, or Kalama identified on the NHC text with a hurricane warning is uninhabited, now a Fish and wildlife haven after years as a US military base. @USFWSPacific
In 1981, the US Army began planning for the Johnston Atoll Chemical Agent Disposal System (JACADS). Construction began in 1986. It is the world's first full-scale facility built to destroy chemical weapons. The design is based on technologies used for years by the Army and industry. The facility actually did not begin full-scale operations until August 1993.
Approaching hurricanes in both 1993 and 1994 necessitated facility shutdown and the evacuation of more than 1,100 soldiers, Department of the Army civilians, and Army contractors from Johnston Island to Hawaii. During each of these instances, JACADS production was disrupted for a period of time. As a result of the hurricane striking Johnston Island in August 1994, JACADS production was disrupted for approximately 70 days
These dangerous jellyfish have been reported on numerous beaches since storms Ophelia and Brian but found these small ones washed up on todays high tide at Morfa Bychan. (I believe they are Portuguese Man 'O War from seeing local photos.)
There were also plenty of the usual jellyfish regularly washed up as well.
Had to keep the dog away once spotted.
Sadly there was another casualty of the storm washed up as well. Apparently seal pup casualties have been very high during the storms.
Warning for viewing image: may upset some people.
A record-breaking day in the Eastern and Central Pacific: 3 consecutive major hurricanes showing up at onceBy Vorticity0123
Well, what a record-breaking day it has been in the Eastern and Central Pacific it has been today! As of speaking, three (3!) major hurricanes are roaming the Pacific waters at the same time, which is unpreceded in these areas. It is likely that this activity has been aided by the ongoing El Nino event, which has caused anomalously warm waters in the Central and Eastern Pacific. In this post I will provide some details about the cyclones individually, as well as a short look into the causes of this record-breaking activity.
A sight to behold
Below is an impressive satellite image showing all three systems in daylight:
Satellite image of (from left to right) Kilo, Ignacio and Jimena. Courtesy: NOAA.
All three systems show up clearly as well-organized hurricanes with an eye visible surrounded by intense convection.
Kilo: a very stubborn cyclone
The leftmost one, and probably also the one with the most interesting history, is hurricane Kilo. Just 24 hours ago, the system was still a 60-knot tropical storm, and now it has almost doubled its intensity up to 110 kt. Exactly what one could call rapid intensification. This make the system a category 3 hurricane on the Saffir Simpson Hurricane Scale.
However, the most remarkable thing is that this system has been more noteworthy for its lack of intensification so far. During the past several days, Kilo was continuously forecast to become a hurricane, which it refuse to do, up to now. It stubbornly stayed as a tropical depression in seemingly favourable environment.
Furthermore, its track has also defied forecasts quite a few times (also partly because it stayed so weak), as also alluded to by Somerset Squall in the thread about this cyclone. Originally, Kilo was forecast to strike Hawaii as a hurricane a week ago as well. Fortunately, this was not the case. Here's a link to the appropriate thread.
Ignacio to possibly threaten Hawaii
The center one is hurricane Ignacio. This cyclone developed in the Eastern Pacific and crossed 140 degrees longitude into the Central Pacific. Initially refusing to intensify quickly as a category 1 hurricane, Ignacio also put up a burst of rapid intensification. As of writing, the cyclone is now a category 4 hurricane with 120 knot winds.
What is noteworthy about Ignacio is that it may be a threat for Hawaii in a few days, as it moves closer to the islands from the southwest. Currently, the CPHC forecasts the cyclone to pass safely to the north of the islands, only causing high surf among the islands.
Another unusual thing about the forecast of Ignacio is that it is anticipated to stay a hurricane while passing north of the islands. Cyclones like Ignacio seldom retain hurricane intensity while passing to the north of the Hawaiian islands from the east.
More to be found here:
Jimena to undergo eyewall replacement cycle
Finally, the easternmost cyclone that can be seen here is Jimena. As of speaking, Jimena has already past her peak, and is now a 120 knot system, making it a category 4 hurricane. Her intial peak was reached 6 hours ago at 130 knots. Talking about rapid intensification, Jimena managed to get from 25 kt to 130 kt in merely 3 days!
The NHC has noted that Jimena has developed concentric eyewalls, which means it is likely to embark onto an eyewall replacement cycle. In such a cycle, the inner eyewall weakens and dissipates, while a new, larger outer eyewall becomes better defined. In this process, the eye becomes much larger and the system itself usually weakens a bit. After completing such a cycle, a new round of intesification can begin assuming that favourable environmental conditions prevail. This could also be the case for Jimena. So far, the system is not forecast to hit land.
Here is her own topic: https://forum.netweather.tv/topic/83870-major-hurricane-jimena/
Anomalously warm waters due to El Nino
One of the major causes of this unique event appears to be related to the El Nino that is currently active. Below is a map of the SST (sea surface temperature) anomalies of the 27th of August:
SST anomalies as of 27 August. Courtesy: NOAA.
For clarity, the black box roughly indicates the area in which the tropical cyclones are residing. Note that this area does not explicitly overlap with the most significant warm waters near the Equator associated with the El Nino event. Still, sea surface temperatures inthe encircled area are much warmer than average, contributing in the increased tropical activity.
An impressive event to say the least, three consecutive major hurricanes active in the Eastern and Central Pacific. Possibly we will even be facing one or two category five hurricanes in the very near future. Much more can be said about these systems, so do not hesitate to add any facts/statistics/any other things you might think of .
Finally, just because of the amazing sight, below is a loop of the three tropical cyclones at major hurricane intensity. Click to activate.
Satellite loop of the Eastern and Central Pacific. Click to activate. Courtesy: NOAA.
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