Re: Tornadoes

On Apr 18, 3:11?am, Weatherlawyer <Weatherlaw...@xxxxxxxxx> wrote:
On Apr 14, 11:07?pm, Harold Brooks <hebrook...@xxxxxxxxxxx> wrote:





In article <1176584980.708073.181...@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
Weatherlaw...@xxxxxxxxx says...

On Apr 9, 9:50?am, "sirpa...@xxxxxxxxx" <sirpa...@xxxxxxxxx> wrote:
I'm not sure of a world-wide database, but in the U.S. you might want
to look at Storm Data:

http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwEvent~Storms

Excellent, thanks.

If you want the tornado data on a tornado-by-tornado basis, rather than
on a tornado segment (one segment per county for tornadoes in multiple
counties), the dataset through 2005 is available, along with
documentation, athttp://www.spc.noaa.gov/climo/historical.html. ?
Technically, the NCDC site is the official archive but it's more
difficult to interact with, in my opinion, than the unofficial archive
at SPC. ?The growing European Severe Weather Database is athttp://www.essl.org/ESWD/.

Thank you.

Whilst I am on a roll here, anyone care to find me a site or sites
that gives the sea level pressures for ocean basins like this example:http://www.westwind.ch/?link=ukmb,http://www2.wetter3.de/Fax/,.gif,br....

...but for other oceans?

I'm looking for charts that are easy to see anomalies on, specifically
the relative pressures of adjacent air masses.-

Damn but there is a negative oscillation going on somewhere. And I
can't honestly see this spell breaking until the last week in May.
Though one or two of the phases here look like cutting it fine:
http://sunearth.gsfc.nasa.gov/eclipse/phase/phases2001.html

The problem is that the most likely ocean basin that the present
situation points to is the North Atlantic.

17th Apr 11:36.

FWIW that is a new moon. All the peturbations involve some sort of
harmonic over the longitudes of it's east shore.

OK, so maybe I need South Atlantic charts. Somewhere they must exist,
musn't they?

I noticed that the words weak, isolated and trough appeared here too:

Weather Summary
Issued: Saturday, 21 April 2007

Weak onshore flow along the Western Cape coast brings widespread fog
to the area. A band of isolated showers and thundershowers will
extend from southern Namibia, into the northern parts of the Northern
Cape, North West Province, Free State, extending to the south-east
coast.

Tomorrow a weak high riding to the east will result in cloudy
condtions,
with scattered shower along the east coast. Scattered thundershowers
are
expected over KZN, Mpumalanga and the north-eastern Free State.

Isolated thundershowers will occur across the northern interior of the
country.

A high pressure system will dominate over the western parts on Monday,
where it will be sunny. Isolated thundershowers are still expected
over
the north-eastern parts, although scattered thundershowers on the
Mpumalanga escarpment and lowveld.

A few morning showers are likely in the lowveld on Tuesday, otherwise
most of the country will be partly cloudy to sunny. Isolated thunder-
showers will develop over the western interior of the Northern Cape
in the afternoon.

A cold front associated with a strong upper air
trough will be approaching the country from the west on Wednesday.
Isolated afternoon thundershowers are expected to develop over the
eastern Karoo, spreading to the south coast later.

The cold front reaches the west coast on Thursday, bringing cloudy,
cold and windy conditions, along with rain and showers, to the area.

The cold front moves across the central interior on Friday, while the
upper air trough results in showers over the southern and western
parts
of the country. Cold to very cold, wet and windy conditions are likely
to
develop over the southern and western high ground of the country.

http://www.weathersa.co.za/FcastProducts/General/Summary.jsp

Tuesday the 24th is when the spell changes about one hour. The first
quarter. It encompasses the longitude some half an hour east of the
Greenwich meridian. And of course the one some 90 degrees following.

Perhaps the Bay of Bengal?

But a sea level pressure chart would paint a thousand words.



.

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