Downburst pedemontana centro-orientale veronese 29/08/2020

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Hi Aaron, congratulations on the very challenging chase. You have risked a lot positioned that way.
Maybe we met in Transpolesana on 11/7, is it possible?
You were 4 people, I owned a dark blue glof along with my wife.

If the sighting is at 15.05 with the times we are. Too bad for the darkening of rainfall.
He arrived in Colognola in the Decima area at 15.10.
The cloud funnels that I filmed after 15.14 came out of the rainfall, they may be visible again.

Yes we were four people so maybe we saw eaach other If I search Transpolesana 11/7 on Google Maps it marks an area on SS434 south of Legnano, is that the place that you mean?

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Hi Aaron… congratulations for your chasing. Your are the best chasers to second part of the supercell.
Unfortunately, the best viewpoint for detecting the wrapped tornado was probably located northeast of the mesocyclone.

Thanks Massimo! :)
the Tornado was so heavily rain wrapped I don't think that it was visible anywhere outside the rain, at least at the time we saw it. Maybe when it formed it was visible from outside the rain but when we got it it was very deep inside the RFD engulfed by the rain.

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

is it possible that you have photographed this.

(15.12)

(15.10)




(15.12)

I don't think that it was visible from outside the rain. Or if you could see it, there must be at least some rain in front of it. So what you photographed was not the same, but probably a new mesocyclone forming along the RFD Gustfront?

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

The powerflash of 15.09 could be a ground cloud lightning appeared at 15.10 (we have one minute offset)

I'm sure that it was a powerflash and not just a lightning strike. I was on the other side of the storm at that time and the powerflash seemed to be closer to the back side of the meso. Or did the lightning strike trigger a powerflash? I've seen that once a few years ago when a lightning hit a transformer. But even than I think we would have been to far on the back side to see it.

[*roby*]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Yes we were four people so maybe we saw eaach other If I search Transpolesana 11/7 on Google Maps it marks an area on SS434 south of Legnano, is that the place that you mean?

Fantastic ... After Legnago on one of the exits I don't remember which one.

[*roby*]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

I don't think that it was visible from outside the rain. Or if you could see it, there must be at least some rain in front of it. So what you photographed was not the same, but probably a new mesocyclone forming along the RFD Gustfront?

Or did the subsequent thinning of the precipitation make it visible? What is certain is that the subjects we photographed in a given time and space have produced damage from EF0 and EF1 certified by Massimo and MassimoColognola.

[*roby*]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

I'm sure that it was a powerflash and not just a lightning strike. I was on the other side of the storm at that time and the powerflash seemed to be closer to the back side of the meso. Or did the lightning strike trigger a powerflash? I've seen that once a few years ago when a lightning hit a transformer. But even than I think we would have been to far on the back side to see it.

Usually the CG can have multiple discharges, similar to a short on a power line caused by a tornado. In ballistics Caldiero and A4 are located behind the small bush. Mind you: powerflash or no powerflash is indifferent.

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Fantastic ... After Legnago on one of the exits I don't remember which one.

That's cool! Do you know the approximate time?

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Or did the subsequent thinning of the precipitation make it visible? What is certain is that the subjects we photographed in a given time and space have produced damage from EF0 and EF1 certified by Massimo and MassimoColognola.

Well I can't be sure if it was at some point visible at your location. But it defiantly has to be in the RFD behind the RFD Gustfront.

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Usually the CG can have multiple discharges, similar to a short on a power line caused by a tornado. In ballistics Caldiero and A4 are located behind the small bush. Mind you: powerflash or no powerflash is indifferent.

Well I'm sure it was a discharge from a power line. What I don't know is the exact cause of it. It was definitely somewhere along the back side of the Meso what makes wind damage very likely. There was no visible lightningstrike when the Powerflash happened.

[Aaron]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Ieri ho fatto un sopralluogo a Colognola e a nord ovest di località Fiorani per verificare le direzioni del vento.
A Colognola ai colli sulla sommità ci sono segni rotazionali evidenti lungo un tragitto che va dalla chiesa di Colognola fino a 600 metri più a nord est. Questo è l’aggiornamento aree e direzioni di Colognola ai colli


Questo l’aggiornamento di Montecchia


Questo è l’aggiornamento totale


Quindi pare che l’eventuale touch down prediliga cresta. Sarebbe da verificare anche la zona di Calvarina tra Monteforte e Arzignano.

Una nota curiosa: alcune delle reti paragrandine a protezione dei meleti strappate nella pianura tra Zevio e Caldiero sono cadute a nord est di colognola alta con un percorso di almeno 5.5km lungo lo storm track. Questo mi è stato raccontato sia dal contadino del fondo dove sono cadute sia da un contadino vicino a casa mia. D’altronde le ultime reti presenti erano in prossimità della strada Porcilana. Nei danni che ho rilevato lo strappo delle reti è avvenuto a Caldiero in zona Porcilana e tra Santa Maria e Zevio.

Hi Massimo, would it be okay if I post this map you created in the two German weather forums? And is it okay if I show your map in a YouTube video I'm making of that day? Of course with a caption that you created the map.

It amazes me that the net was blown more than 5 km. That should be impossible for a downburst. It must be carried upward. So this is another good hint for a tornado.

[Massimo M.]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Hi Massimo, would it be okay if I post this map you created in the two German weather forums? And is it okay if I show your map in a YouTube video I'm making of that day? Of course with a caption that you created the map.

It amazes me that the net was blown more than 5 km. That should be impossible for a downburst. It must be carried upward. So this is another good hint for a tornado.

Great, you can use anything you want ...

Some nets downfall 8 km north. The powerflash you viewed were probably due to the fall of the nets on the electric cables (between colognola and Illasi).

[*roby*]

Re: Downburst pedemontana centro-orientale veronese 29/08/2020

Volevo segnalare questo aggiornamento della IF scale.

The International Fujita (IF) Scale

In particolare la sezione "4.3 Determining the nature of an event".