Another bowing segment in the line and AZshear/Torp response

The convective line developed a new bowing segment just before 1420 UTC and AzShear and Torp responded accordingly with a significant increase in Azshear and a Torp value of 59%. Combining this knowledge with the environment and bowing segment lining up with the bulk shear vector, decided to go ahead and warn based on this data.

Flash

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Alternating TORP objects for same storm

TORP produced two different objects for the same mesovortex in a line over MD, alternating between the two each scan. This produced two objects that each had their own probability and trend, but only one showed each scan.

KDOX TORP Object 140
KDOX TORP Object 545

 

-Nimbus

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AzShear is showing an increasing signal with this bowing segment. Torp probabilities have hovered in the 20-30% range roughly, which seems to match up with current thinking -Sidney Crosby

Torp w/ Track & Early Warning

New Torp feature w/ track (bottom image) was useful in warning decision making. Seeing that a track existed, as well as a modest increase in Az shear trends, in addition to previous storm reports…I chose to issue a warning.

UPDATE:  AzShear increased quite a bit over the next 10 min after warning was originally issued.

-Oppenheimer

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AzShear/DivShear signal with low Torp

Another kink in the convective line developed around 1350 near Anne Arnold with what looks like a potential RIJ developing and the AzShear and DivShear both picked up on this although not showing exceedingly high values and Torp (not shown) had a 33% probability object identified. This increased my situational awareness of this storm and tracking the next couple of scans, the Torp dropped off and notch went away as the line became more linear again. In this instance the Torp did well in identifying a potential threat but correctly dropped out with time.

Flash

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1357 Radar and No Torp Object

Focusing on the weak mesovort just to the northeast of Anne Arundel. I would have concerns for tornado there, though there was only one brief TORP object before it dropped. -Sidney Crosby

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AZshear/DivShear and ground clutter

I noticed well behind the convective line there were some really high values of AZshear and DivShear northwest of the radar which appears to be associated with ground clutter and something that forecasters will need to be aware of and confirm with the base products to identify they are erroneous.

 

Flash

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Observed multiple low-probability TORP objects along the warned line. Initially had the filter set at 30%, so I didn’t see  two of them until I lowered it to 20%.