The Deadly Oklahoma Tornado Outbreak
of May 3-4, 1999

Answer to Question 1
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Question 1. Look at the moisture fields observed by the Mesonet between 1:00 and 5:00 p.m. What changes occur over the state during this time period?
 



 

 
Answer. The most evident change across Oklahoma between 1:00 p.m. and 5:00 p.m. is the progression of a dryline in the western part of the state. As is typical with drylines, the dew points behind the dryline decreased, while the moisture in central Oklahoma slowly increased ahead of the dry line.

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