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<br />1;1 <br /> <br />.:>,~.,. <br />"u, 1 <br />: .!:. .:'~ <br /> <br />were getting resupplied, the precipitating system as a whole took <br />on a new character. By 11 p.m. the large area of storms, in the <br />eastern and northeastern part of the tar~et area, ~ad begun iio <br />reorganize and intensify into a more ~olJ.d. NE-~W lJ.ne of ha - <br />bearing storms and slide southeast. ThJ.s Shlft ~n storm movement <br />appears to be the result of the upper trough driving further <br />through the region at this time. , <br /> <br />Between 11:15 and 11:23 p.m. all cloud base planes were <br />scrambled to seed the line; it was most intense near U1yss.es. <br />Seeding around the southwest end of the line in Grant County began <br />at 11:51 p.m. Others began at 11:52 and 11:57 p.m. Some seeding <br />was conducted briefly along the south side of the line over Haskell <br />, and Gray .counties, however "ceilings, and visibilitit;!s .deteriorated <br />with many more new storms growing ahead of the line. Seeding was <br />terminated at 12:18 a.m. ' , <br /> <br />SEPTEMBER 6th - OPERATIONAL DAYS #74: By mid-afternoon a north- <br />south oriented surface trough in eastern Colorado had become joined <br />to a NE-SW oriented cold front in northeast COlorado and had begun <br />moving into Kansas forming severe thunderstorms near the Kansas- <br />Colorado state line west of Stanton and Hamilton counties. All <br />planes were scrambled at 3:25 p.m. <br /> <br />The storms were moving quickly to the northeast and by 3:55 <br />p.m. a NNE-SSW line of storms had formed along the surface trough <br />running from western Greeley County through western Hamilton and <br />Stanton counties and further into southeast Colorado and the <br />Oklahoma panhandle. Seeding began at 3:47 p.m. in southwestern <br />Hamilton County. Other planes began seeding on the line at 3:54, <br />3:55, 3:59 and 4:10 p.m. Planes were moved around the line to the <br />most intense areaS- located in southwest Stanton and northwest <br />Hamilton counties. A,s cells within the line moved northerly and the <br />line moved east into central Greeley, Hamilton and Stanton <br />counties, new storms grew in northern Wallace County. Seeding was <br />performed. in. northern" Hamilton,. central Greeley and northeast <br />Wal.lace, a,sbw~ll,asnor,thel;'i'i 1010ttori/southernStairLon. Tl',e cloud top' <br />plane began seeding NE~SW across Wallace County beginning at 5:10 <br />p.m. ' <br /> <br />The effect of storms building along the advancing cold front <br />could be seen as early as 4 p.m., however, it was much more evident <br />between 5:00 and 5:40 p.m. as the primary storm area across the <br />northwestern part of our target area reorganized to become a solid <br />line of storms oriented NE-SW and by 6 p.m. the line extended south <br />through eastern Colorado to extreme southeas~ Colorado. As this <br />reorganization of storm was taking place, two planes were sent in <br />to refuel and resupply, one at 5:32 p.m., the other at 5:40 p.m.; <br />they were airborne again at 6:28 and 6:41, respectively. After 5:30 <br />p.m., with the line reorganizing, seeding became concentrated in <br />~reeley County as new severe storms entered Kansas near Towner, CO. <br /> <br />~-~ <br /> <br />n1ane was sent to Stevens County at 5:51 p.m. .to meet a <br />, -- of storms moving northeast into southeast Stevens <br />