[wxqc] Moisture Content

[Evan Bookbinder]

Worst-case means what it sounds like. Over a given 1km x 1km pixel, the
composite reflectivity plots the highest reflectivity found at any slice
above that pixel.

HTH,
Evan 

> -----Original Message-----
> From: wxqc-bounces at lists.gladstonefamily.net 
> [mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf Of 
> Victor Engel
> Sent: Wednesday, May 02, 2007 8:10 PM
> To: Discussion of weather data quality issues
> Subject: Re: [wxqc] Moisture Content
> 
> What do you mean "worst-case"?
> 
> BTW, a 99 Kg/m^2 storm just popped up.
> 
> On 5/2/07, Evan Bookbinder <Evan.Bookbinder at noaa.gov> wrote:
> > The "combination of slices" in a worst-case sense is the Composite 
> > Reflectivity product.
> >
> > Evan
> >
> > > -----Original Message-----
> > > From: wxqc-bounces at lists.gladstonefamily.net
> > > [mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf 
> Of Victor 
> > > Engel
> > > Sent: Wednesday, May 02, 2007 7:31 PM
> > > To: Discussion of weather data quality issues
> > > Subject: Re: [wxqc] Moisture Content
> > >
> > > Right. Didn't mean to confuse. Right now there is a storm 
> reading 84 
> > > Kg/m^2, and there is no mention of hail.
> > >
> > > The problem with the slices is that they're not combined. Or is 
> > > there a resource that graphically shows this combined 
> data somewhere 
> > > that I'm unaware of.
> > >
> > > With this low pressure zone hovering over Texas, I've 
> been enjoying 
> > > watching the storms and comparing the various tools out there.
> > > Yesterday, I sent an email to someone pointing out a storm where 
> > > there seemed to be a very strong local difference in relative 
> > > velocities. I suggested that maybe it would produce a 
> tornado. Half 
> > > an hour later, there was a tornado warning from the same storm, 
> > > somewhat north of Fredericksburg.
> > >
> > > On 5/1/07, Evan Bookbinder <Evan.Bookbinder at noaa.gov> wrote:
> > > > Just to avoid any confusion in Victor's post, there is no
> > > correlation
> > > > between VIL and hail probability/size...the latter 
> variables come
> > >
> > > ... this seems to have been cut off. Did you intend more?
> > >
> > > > VIL is a vertical integration (summation) of the amount of 
> > > > reflectivity returns over a given "pixel". Its usefullness
> > > is really
> > > > aged in an era where we have quick acess to the various
> > > tilts/slices
> > > > from the radar, but was used as a quick glance to find the
> > > 'worst' heavy rain producers quickly.
> > > >
> > > > Max values really depend on how VIL is calculated. 
> Wunderground is 
> > > > using an averaged 1x1 sq. km pixel with a 58 dBZ cap in the VIL 
> > > > calculation. Values of 80-100 would be seen with really
> > > deep/intense
> > > > storms in the summer. 71 is very high.
> > > >
> > > > Evan
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: wxqc-bounces at lists.gladstonefamily.net
> > > > > [mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf
> > > Of Victor
> > > > > Engel
> > > > > Sent: Tuesday, May 01, 2007 6:56 PM
> > > > > To: Discussion of weather data quality issues
> > > > > Subject: Re: [wxqc] Moisture Content
> > > > >
> > > > > What I meant was VIL (vertically integrated liquid). 
> The storm 
> > > > > currently at 71 Kg/m^2 is predicted by weatherunderground
> > > to have a
> > > > > 100% chance of producing damaging hail with size up to
> > > 2.75 inches.
> > > > >
> > > > > On 5/1/07, Victor Engel <brillig at gmail.com> wrote:
> > > > > > I hope this isn't too far off-topic. I've just recently
> > > > > discovered the
> > > > > > wonderful animated radar images provided on 
> weatherunderground.
> > > > > > Currently there are some storms exceeding the scale, which
> > > > > maxes out
> > > > > > at 70 Kg/m^2. Oh, wait a minute. The scale just added
> > > > > another 5 Kg. I
> > > > > > guess it's an adaptive scale. How high do these moisture
> > > > > readings get?
> > > > > >
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