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<br /> <br />Y-- <br /> <br /> <br />DI <br />SC <br />I AX <br />F <br />FOR ToRE PERIOD JUNE 26 - JULY 2, lSS4 ~ <br /> <br />E <br />General Interes~: Whatever happened to our weather in <br />the Mr. Pinatubo volcanic eruption in the Philippinee in June 1991? <br />Two years ago in our Newsletter (#92-18) we presented an article <br />froln the American Meteorological Society Bullet:l..n about the current <br />theory at the time that the VOlcanic ash cast into the atmosphere <br />was causing glob&l cooling around the world. Probably we still <br />remember in Kansas our wet summer of 1992 and the r.eoord, or near <br />record, snowfall for the winter of 1992-93 ~ollowed by thewette~ <br />Bummer of 1993 and a July whioh was the coolest, or near coolest on <br />record fo~ most p~rts of Kansas. In that article two years ago it <br />wass~aLea tha~ tne authors were estimating "...the cooling effect <br />would bottom should bottom out in about two years and disappear <br />completely in 4 to 5 years if the earth's 'temperature responds <br />similarly to what it did following the 1982 eruption of the Mexican <br />volcano, El Chich on. " . . . <br /> <br />WEEKLY NEWSLETTER <br />94~9 <br /> <br /> <br />well, here we are two years later and, by all accounts, it <br />sure seems summer temperatures and moisture in Kansas is looking <br />like it's old ael!. The meteorological world is learning more <br />about climato and weather all the time. The interrelationships <br />among the various fluids (air and water) on earth and the <br />activities occurring within those fluids when combined with solar <br />radiation effects present S01l1e highly complex processes to make <br />sense of, to say the least. As time passes, progress will be made <br />~n our understanding of the processes and fluid interrelationships <br />which combine to produce our .weather patterns both for the short <br />term and long term, however, as with any science, the more we learn <br />about something, we usually find out there is still much, much more <br />we don't know. <br /> <br />OPERATIONS: This was a week in which Western Kansas thunderstorms <br />were formed because of high surface temperatures, abnormal amounts <br />of. low levellTioieture, surface troughs in the "~rylinen zona, upper <br />troughs and strong low level winds combining in various ways to <br />affect us repeatedly. Fortunately, an important missing ingredient <br />in all this was the lack of upper winds of jet stream velocity--- <br />except for one of the days. Lacking strong upper level winds, the <br />very large, persistent storms and supercells didn't present <br />themselves. All times are Central Daylight Time. <br /> <br />~ 29th - OPERATIONAL DAY i23: By 2 p.m. incipient severe storms <br />were al~eady building along the Kansas - COlorado state line west <br />of Hamilton county about 10 miles south of Bolly, Colorado, and, <br />separately, southwest of Goodland. General movements were to the <br />southeaet around 35 - 40 mph. All planes were scrambled between 2 <br />p.m. and 2:19 p.m. Three planes were sent first to the developing <br />etorm near Holly; two aircraft began seeding it at 2:37 p.m. and <br />2:45 p.m., respectively, by which time it had moved into south- <br />western Hamilton county. The third plane was diverted toward the <br />