Surface wind data from the upper Midwest and GOES satellite imagery have been juxtaposed to create climatologies of non-convective wind events in the Midwest. Surface wind data from the 1940s through 1995 have been used to create two regional climatologies, one of non-convective winds and another of November 12Z winds. The results of the first climatology reveal a fall-season spatial trend in the month of most frequent non-convective winds from northwest to southeast, from Minnesota in October to Ohio in December. The second climatology reveals a pronounced southwest quadrant preference for the strongest winds in the Midwest on November mornings, a preference that becomes very dominant for the highest winds. Both of these results imply that the windstorms are closely related to mid-latitude cyclones and are not strongly influenced by geography, counter to some published research on the subject.
The possibility that stratospheric intrusions in mid-latitude cyclones are dynamically related to these windstorms in the upper Midwest has been explored using water vapor and ozone products from GOES. Dry slot development in satellite imagery and high surface wind reports have been used to identify case-study candidates, in order to develop nowcasting techniques using advanced satellite products. Results of this work will be presented at the meeting.