At WFO Great Falls (TFX), we made use of the Octane speed and direction imagery, plus the IR brightness and day-cloud phase distinction to evaluate a cell northeast of Iliad. This imagery helped us screen the multiple cells over the CWA so we could home in on this particular cell. Characteristics that stood out included the higher anvil speeds on this cell, the diffluent cloud top signal on the Octane direction imagery; the cooler cloud tops (around -62C), and new/robust convection noted by DCPD.
4 Panel OCTANE depiction of severe warned storm near Iliad, MT.
Meanwhile, the cell closer to the Canadian border is becoming stronger. The ProbSevereV3 is trending higher for total severe, up to 19% at 2104Z. The anvil from the storm to the south is beginning to impinge on the cell to the north and somewhat obstruct the view.
The PHS imagery showed a regional peak in MUCAPE in this area.
Looking a bit later, the total ProbSevere continues to climb. It is well above the individual probabilities, which is curious.
Storms have matured with a notable V notch of cooler cloud tops and warmer tops to the north of the notch. Based on Octane speed, there is a notable difference in speeds from the southern end of the anvil to the northern reaches with 35-40 kts increasing to 65-70 kts. PSv3 does indicate a 50% chance for severe with this storm.
Meanwhile, down in CA, northeast of Sacramento, the Octane direction product is showing an impressive divergence signal!
– Satellite Steve and Edgar
-Thunderstruck
PHS shows a similar trend to NUCAPs with higher areas of SBCAPE across the central and southern CWA with lower values across the northern half of the CWA. However, the color scale on the online version of PHS is difficult to interpret as the gradient ramps up from light red to dark red. So, you cannot really pinpoint specific values of SBCAPE. However, you are able to see areas of lower SBCAPE and areas of higher SBCAPE at a glance. 
The Octane Speed Sandwich product further confirms that storms are remaining below severe limits as the strongest storms are noted over southeastern Florida this afternoon as of 1930Z. Not only do these products help us pinpoint areas of potential severe weather, but they also help us pinpoint areas of sub-severe weather. 
GLM shows lightning activity increasing across the Tampa CWA early this afternoon, and activity is expected to gradually increase in coverage as more thunderstorms develop through the late afternoon and early evening hours. 
Lightning Cast around 1930Z shows lightning probabilities increasing across the Tampa CWA over the next hour. Pink contours represent a 75% chance of lightning in the next hour. Green represents a 50% chance, teal a 20% chance, and dark blue a10% chance of lightning in the next hour. 
GLM showing lightning activity increasing across Florida from 1930Z through 2016Z across the Tampa CWA. Areas showing more oranges and yellows have shorter flashes and more lightning density. These areas help us know where stronger updrafts are located. The strongest updrafts at the time of this loop remain outside of the Tampa CWA. 
-Dwight Schrute
GOES-16 Octane Direction. 
KPUX 0.5 degree reflectivity.
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SPC MUCAPE Mesoanalysis valid at 18Z shows similar trends to the 15Z PHS MUCAPE values.
Probabilities ramped up quickly for both ProbSevere and ProbHail on this storm at the edge of the PUB/ABQ CWA boundary. 
Octane around “peak” of the storm.
Low Level SRM and ProbSvr (0.5 deg slice is about 10.8k ft AGL)
Mesh showing 3 inch hail on the border of the Pueblo CWA. 
Octane Speed/Direction at “Peak” of the storm, around 2045Z. Directional shear varied from ~205 degrees (reds) to ~285 degrees (greens). 
Octane speed/direction further confirming the weakening trend as colors become more diffuse in nature.
An increase in both storm top speed/directional shear was also shown by the Octane product.
The level reflectivity images show an impressive core peaking in the 36-40k ft range, shown in the 12.5 deg. slice. 
MESH showing nearly 4 inch hail south of our DSS event in Pueblo. The event was notified about the potential for large damaging hail.
Prob Severe v3 at 2028Z for severe-warned supercell across central Elko County
