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<br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />'. <br />. <br />. <br />. <br />. <br /> <br />The following 15-minute period (2145-2200 UTe) continues to show <br />vigorous CG activity focused on the Middle Creek valley with a vast majority of <br />the strikes occurring between 9000' and 10000' in elevation. The next period <br />(2200-2215 UTe), continues to show a high number of CG strokes in and along <br />the Middle Creek valley, with nearly a quarter of the 88 strikes in this period <br />striking along the sides of Baxter Mountain, which is in the upper portion of the <br />Middle Creek basin. <br /> <br />Once again, nearly all strikes (75/88) were at elevations above <br />9000'. Between 2215-2230 UTC, just over 50% of the 65 CG strikes during the <br />period, were confined to a relatively small area in the central portions of Bear <br />and Cross Creeks with nearly all of the strikes, once again, occurring between <br />9000' and 10000'. All other strikes during this period were relatively scattered in <br />nature. As the core of the storm moved primarily to the southeast of the grid <br />area 17 of 37 CG strikes that occurred were clustered in the lower portions of <br />Cross and Middle Creeks below 9000' with all other strikes either scattered, or <br />out of, the immediate area of interest. <br /> <br />4.2 CG Data and Radar Reflectivity <br /> <br />Further analysis on the relationship between radar reflectivity and the CG <br />lightning data was also performed. In the 2115-2130 UTC period only 2 strikes <br />occurred in the grid however, during this brief period the storm experienced a <br />notable increase in the intensity of the storms maximum reflectivity to the 50+ <br />dBZ level. From 2130-2145 UTC, a majority of CG strikes in this period appear to <br />occur in the area surrounding the 50+ dBZ level in the core of the storm. In the <br />period from 2145 to 2200 UTC, an argument could be made that there are two <br />distinct patterns to the CG strokes. <br /> <br />The first is the appearance that a fair number of strokes (27 of 58) are <br />close to the edge of the 30 dBZ boundaries at either 2149 or 2154 UTe. A <br />second pattern, albeit not as conclusive, is that a secondary group of strokes <br />appear to be near the 50+ dBZ core at some point in this segment. In addition, <br />these patterns show that the CG strokes were located primarily to the north, <br />which is to the left of the mean wind steering flow. <br /> <br />During the 2200-2215 UTC period, which contains the most CG activity, <br />the majority of the strikes were well to the north of the storms 50+ dBZ core but <br />the strikes do not appear to 'hug' the 30+ dBZ area as closely as at other time <br />periods. In addition, there were a minimal number of strokes (4) that were in <br />the proximity of the 50+ dBZ area. From 2215-2230 UTC, the pattern of CG <br />strikes appears to support the occurrence of strikes on the edges of both the <br />30+ and 50+ dBZ areas. However, as the storm core leaves the grid area, the <br />strikes appear to be located on the west and northwestern edges of these areas. <br /> <br />The final period (2230-2245 UTe) of the grid-based CG data shows that <br />strokes continue to occur even though the vigorous area of the storm (+50dBZ) <br /> <br />16 <br />