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On 18 September 1992 a series of thunderstorms in Nebraska and eastern Colorado, which formed south of a synopticscale cold front and north of a Rocky Mountain lee trough, produced a cold outflow gust front that moved southeastward into Kansas, southeastern Colorado, and Oklahoma around sunset. When this cold outflow reached the vicinity of the lee trough, an undular bore developed on a nocturnally produced stable layer and moved through the range of the Dodge City WSR-88D Doppler radar. The radar data revealed that the undular bore, in the leading portion of a region of northwesterly winds about 45 km wide by 4 km high directly abutting the cold outflow, developed five undulations over the course of 3 h. Contrary to laboratory tank experiments, observations indicated that the solitary waves that composed the bore probably did not form from the enveloping of the head of the cold air outflow by the stable layer and the breaking off of the head of the cold air outflow. The synoptic-scale cold front subsequently intruded on the surface layer of air produced by the cold outflow, but there was no evidence for the formation of another bore. Profiler winds, in the region affected by the cold air outflow and the undular bore, contained signals from nocturnally, southward-migrating birds (most likely waterfowl) that took off in nonfavorable southerly winds and remained aloft for several hours longer than usual, thereby staying ahead of the turbulence associated with the undular bore.

Presents news items on the different chapters of the American Meteorological Society as of April 1, 2001. Greater Milwaukee, Wisconsin; Greater St. Louis, Missouri; University of Nebraska-Lincoln; Puget Sound, Washington; District of Columbia; Chicago, Illinois.

Highlights the activities and topics discussed at the meeting of the American Meteorological Society Milwaukee, Wisconsin chapter held at the University of Wisconsin-Milwaukee on April 26, 2000. Guest speaker; Election of officers for the 2000-2001 term; Presentation about troglodyte.

Highlights the chapter meeting of the American Meteorological Society in Sullivan, Wisconsin. Discussion on the National Weather Services (NWS); Salaries of persons employed at the NWS; Explanation of numerical weather prediction.

Reports that the High Plains chapter of the American Meteorological Society meeting was held on March 11, 1997. Where the meeting was held; Who was the guest speaker at the meeting; Amount of people attending the meeting.

Presents several developments in the chapter meetings of the American Meteorological Society Chapter in the United States as of July 2001. Presentation of the spotter training course for 2001; Sessions on flash flood forecasting.