Tuesday, June 27, 2017

EWP Week 2, End of Day 2...Thoughts & Feedback

Our forecasters remained in the North Platte, NE and Rapid City, SD CWAs for the duration of the shift.  The onset of convection was slow as the shortwave moved out of the Rockies. Thunderstorms intensified by late afternoon and evening, leading to numerous warnings.

·       GOES-16 ABI Imagery and products (Imagery/Derived/Channel Differences/RGB Composites)
o   Hard to tell between different shades of green on the air mass product…but the product could be useful on the synoptic scale, could easily identify cold air masses
o   Help sheets for the RGBs could be a huge benefit
o   Adjusted the color table for precipitable water products, colors were all over the place
o   Missing data from the derived products was frustrating
o   Really like the 1 minute data, but the differences between it and the 2.5 minute are subtle.  Could live with 2.5 minutes
o   1 minute data does give some lead time on storms, helps with the radar in conjunction
o    
·       GLM
o   Anvil strikes were interesting to see, a whole county ahead of the storm.  Useful for educating the public on the distances strikes occur from the storm
o   Like the interpolated data, like the combined product
o   Maybe a color table for every 0.5 standard deviation would be useful
o   Want to see increases/decreases in trend
o   Almost felt you could warn on a storm based upon lightning if radar coverage was low
·       NUCAPS
o   Compared 20Z special sounding to the experimental and operational…caught onto cap weakening and breaking
o   Latency of data…became outdated
o   Gridded data appeared a lot different from SPC mesoanalysis page
o   For those at without an upper air site nearby, it’s nice to pull up and know you’ve got some data
·       ProbSevere
o   ProbTor…saw it go from 80% to 30% back to 80% over a few scans, but azimuthal shear didn’t really change…lead me to ignore the jumps

o   ProbSevere did much better with single storms versus when there were several


-Holly Obermeier

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