PAR: Second 0.5 deg scan may be causing an issue with the virtual vol scan in WDSS-II.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

CASA: Lawton radar got knocked out of service by the bow. Continuing analysis using Cyril and Rush Springs.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

CASA influenced 3dVAR is showing the 50kt winds in the bow going through Lawton. 88D shows the bow shape better than the Lawton radar due to the attenuation. 74kt inbound from Lawton at 2059 UTC at 1kft.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

SW of Lawton radar peak inbound 63 kts @0.8kft in the bow, and KFDR shows 52 kts @2.3 kft. So higher velocities but well mixed in the lowest 2.5 kft.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

Western storms approaching the CASA network. Cyril radar shows a weak divergent pattern to the southwest. No auto RHI there because the reflectivity is weak.

Forecasters are starting CASA evaluation again with these new storms at 2048.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

CASA: X-section cut from Chickasha radar to Goldsby shows a high resolution anvil in its RHI whereas 88D x-section only has a few elevation scans. The RHI is a nice feature!

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

PAR: Bill, Reia and Kristen are running this with Kristen being cognizant scientist. PAR shows max azimuthal DV of about 27kts on those storms near Lindsay to Purdy.

Supercell to south showed signs of lower rotation where the 88D saw it 3-4 min later than PAR. Reflectivity field is not being deformed by the velocity field. The storm appears to still be dominated by individual pulses growing in the flanking line and merging with the main mass, IOW, more multicellular.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

CASA: Briaqn, Craig are working the radar network. They’re observing a lot of cells with weak circulations but not severe. Gradients in velocity from KRSP appear much higher than the 88D not enough to consider them mesocyclones. KRSP max DV ~35kts vs 88D’s 20kts. These storms are from Lindsay to Purdy in Garvin county.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

Bill and Kristen considered a low risk tor for the supercell in east NM but decided to can it.

Craig and Brian had tech issues with a tor threat area that showed up in different locations on the V and Z screen.

End of day. Yeah!

Jim LaDue (EWP Weekly Coordinator, 5-9 May)

The DMC on the southeawstern flank of the cold pool is acquiring some supercellular characteristics with some signs of mesocyclone development on the 0.5 deg scan. Craig and Brian switched again with Brian doing the probwarn and Craig operating D2D. Craig thinks this low-level meso is not reminiscent of a tornadic meso. Brian’s updating wind and now he’s being coached by Greg to quickly create a TOR threat on the velocity img recently swapped to left screen. Craig wants a 20% initial and keep it the same down through the swath valid time. Warning length=30 min.

Jim LaDue (EWP Weekly Coordinator, 5-9 May)