Re: 08:33
- From: Belba Grubb <trungsisterfan@xxxxxxxxx>
- Date: Sat, 20 Oct 2007 15:01:37 -0700
Weatherlawyer wrote:
19th October 08:33. http://sunearth.gsfc.nasa.gov/eclipse/phase/phase2001gmt.html
This one has tornadoes all over it. http://www.spc.noaa.gov/products/watch/
I'm not sure what you are talking about here, but given the early time
you posted this, when the severe weather event from the 18th was still
ongoing, perhaps that's what you were referring to.
This is one rank amateur's brief overview, and I was watching it
closely as it was happening around me, too, though I was on the
southern end of the stuff. Hope George and anyone else here who found
that happening all around them made out all right.
Here is the Storm Prediction Center's latest unverified total of
tornado, high wind, and hail reports from the October 18 event:
http://www.spc.noaa.gov/climo/reports/071018_rpts.html
These are unverified and as time passes the numbers will change
significantly. Checking it about a month or so after the event gives
one a better idea of what actually happened, but the best way to
follow through on it is check out the local NWS office page about a
month out.
Anyway, currently it says there were 45 reports of tornadoes, and at
least several of them will probably verify, but the remarkable thing
about this was actually the high number of wind events. This time of
year we usually get more tornadoes (and I have seen the number of
reports much higher than that). The NWS thought they were mostly all
tornadoes, too, judging by the number of warnings that were issued,
and that was probably based both on the reports and on the radar
appearances of the cells at the time. But I suspect that the number
of actual tornadoes will be far less than 45. The verified number of
high wind events will probably remain close to its present value
though. This was really remarkable any time, but especially in
October and as far north as the worst part of it was.
The weather the previous day had been severe, too:
http://www.spc.noaa.gov/climo/reports/071017_rpts.html
An unforeseen factor in all of this was that a tropical disturbance
(99L) made landfall along the coast near the Louisiana/Texas border
(pretty much the same area as did Hurricane Humberto earlier this
year) just before the factors for the event on the 17th started really
cooking. There was a very strong southerly flow, though, a result, I
think, of the approaching cold front from the west, and the remnants
of 99L didn't veer eastward as Humberto did but went pretty much
straight north. As a result, a huge amount of moisture and
atmospheric disturbance (it was only a tropical disturbance, but even
those are more muscular than your basic thunderstorm) was injected
into the area. I think that really upped the severity of what was
already forecast to be a severe outbreak both on the 17th and the
18th. No professionals have said that, AFAIK, though, but that's how
it looks to me.
Barb
.
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