Two TORP objects were created for this tornado-warned storm. Interestingly, the higher percentage object was new and did not have a trackable history, but the (slightly) lower percent object showed a rapid increase. -Sidney Crosby

An interesting observation of Torp as a tightening and strong circulation moved just northwest of the LWX radar. Torp identified two separate objects (46% and 85%) on what appears to be the only circulation.

Flash

Images show an AzShear maximum in southwestern Loudoun County colocated with a TORP object showing increasing probabilities over time. This coincides with surging reflectivities and broad circulation. -Sidney Crosby

Enhancement of DivShear north of Culpeper grabbed my attention. Coincides with localized “bowing” of line segment and worth watching.  Object marker appeared around this area on the next scan. 

These next two images are from a scan or two later.  Object marker shifted north and DivShear seemed “messier”. Original concern may not have been warranted, based on this, but new area developing to south now is worth monitoring.

Update 3: Enhancement of DivShear and coinciding of strengthening Z resulting in me issuing an SVR. Decision to warn was made at 11:59z (warning eventually issued about  5 min later due to computer issues).

-Oppenheimer

A line of enhanced reflectivity moving toward the LWX radar likely tapping into stronger low level wind fields with strong base velocity values prompting me to issue a severe warning but Torp identifying an object with some interesting AZShear data couplets. Given the environment and this QLCS event the Torp value and its trend increasing adds confidence to add a tor possible tag.

Flash

Noting a few spurious maxes seen in Az and Div Shear. It’s good to see that TORP correctly ignores these areas.

-Nimbus

DivShear showing increasing convergence along the line, particularly through Loudoun County. This also coincides with a number of low TORP probability objects that have also popped up here. -Sidney Crosby

An initial Torp object was detected with a 31% probability northwest of LWX with a slightly enhanced AzShear. However, the reflectivity data was unimpressive as we might expect in this environment with weak instability and velocity was also unimpressive. The next scan it was not there anymore (using a 30% filter for Torp). Not sure what it may have been pinging on and appears to be of little concern ultimately.

Flash

Noticing a DivShear couplet in central Fauquier county indicating convergence. A TORP object with 34% probability also was created in the same area. These products coincide with a surge in the line seen on reflectivity. -Sidney Crosby

Noticing several AzShear and DivShear couplets behind the reflectivity line that aren’t seemingly associated with any areas of interest so far. -Sidney Crosby