This Internet thingummyjig is an amazing resource. I can clearly remember its inception. Along with not knowing how to look into it, I had no idea what to look at. The data on the subjects I was after was mind numbing but ultimately futile since I had not written it yet. Had I known what god had in store for me I would have chosen another occupation. Preferably something with money in it. But I was never any good at making money. Only mess.
It is summer time and I have only just read why:
“The date of the beginning of summer varies according to climate, tradition and culture, but when it is summer in the Northern Hemisphere it is winter in the Southern Hemisphere. Equinoxes and solstices would be the middle of the respective seasons but seasonal lag means the meteorological season, based on average temperature patterns, occurs several weeks later. Under meteorological definitions, all seasons are arbitrarily set to start at the beginning of a calendar month and end at the end of a month.
Irish Calendar summer begins on 1 May and ends on 1 August. rather than the meteorological definition of 1 June to 31 August.
Where a temperature lag of up to half a season is common, reckoning based on astronomical markers is shifted half a season.
In Chinese astronomy, summer starts on or around 5 May, with the jiéqì (solar term) known as lìxià (立夏), i.e. “establishment of summer”, and it ends on or around 6 August.
In Australia and New Zealand, Summer officially begins on 1 December and ends on 28 and 29 February.
In southern and southeast Asia, where the monsoon occurs, summer is more generally defined as lasting from March to May/early June, the warmest time of the year, ending with the onset of the monsoon rains.
Because the temperature lag is shorter in the oceanic temperate southern hemisphere, most countries in this region use the meteorological definition with summer starting on 1 December and ending on the last day of February.
In Mediterranean regions, it is associated with dry weather, while in other places (particularly in Eastern Asia because of the Monsoon) it is associated with rainy weather.
The wet season is the main period of vegetation growth within the savanna climate regime. Where the wet season is associated with a seasonal shift in the prevailing winds, it is known as a monsoon.
In the North Atlantic a distinct tropical cyclone season occurs from 1 June to 30 November, peaking around 10 September.
The North-east Pacific has a broader period of activity, but in a similar time frame to the Atlantic.
The North-west Pacific has tropical cyclones year-round, with a minimum in February and March and a peak in early September.
In the North Indian basin, storms are most common from April to December, with peaks in May and November.
In the Southern Hemisphere, the tropical cyclone season runs from 1 November until the end of April with peaks in mid-February to early March.” (1)
Thunderstorm season in the USA and Canada runs in the spring through summer. These storms can produce hail, strong winds and tornadoes, usually during the afternoon and evening.
That the start of the Tornado season is in April is ignored by the meteorologists who look after tropical storms. But the North Atlantic is connected via the Isthmus of Panama to the Pacific. In fact when geo-physical conditions permit it, the winds in the sub-tropical Pacific blow the wrong way and as in the case of the system of which Amanda was an episode, they can cross the border between them at the shortest part of the narrowest place.
If Boris does cross the continental divide as it is likely to do though the National Hurricane Centre, USA only gives this a 10% chance as of 4 June 2014:
Eastern Pacific Graphical Tropical Weather Outlook
Atlantic Graphical Tropical Weather Outlook
Richard Inwards had very little to say about tornadoes and hurricanes/tropical storms. How could he?
He was born in the late 19th century and although he travelled widely, Meteorology was a new science and relied on people like him to invent it. Weather lore predated FitzRoy, who embodied the leading edge of scientific meteorological research in his day and everyone after FitzRoy -such as Inwards, were on the bleeding edge of discovery and research.
Piteously, little was known about hurricanes until the age of satellites. If you wish to look at the discoveries made by means of them you could not do better than to consult the articles in NASA’s EarthObservatory (4). Rather self congratulatory due to budget cuts following the moon landing but full of interesting data none the less.
1. Summer From Wikipedia, the free encyclopedia
2. National Weather Service (NOAA). National Hurricane Center. Graphycal Tropical Weather Outlook (Atlanctic)
3. National Weather Service. National Hurricane Center (NOAA). Graphycal Tropical Weather Outlook (Eastern Pacific)