1 / 17

Las Vegas Event 8 July 1999

Las Vegas Event 8 July 1999. Jennifer H. Maxwell. Las Vegas Flash Floods. Strong thunderstorms in the Las Vegas valley occurred between 18z and 19z. More than 2 inches of rain fell in less than 1 hour resulting in damaging flash floods (rainfall rates were likely over 4 in/hr).

chiko
Download Presentation

Las Vegas Event 8 July 1999

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Las Vegas Event 8 July 1999 Jennifer H. Maxwell

  2. Las Vegas Flash Floods • Strong thunderstorms in the Las Vegas valley occurred between 18z and 19z. • More than 2 inches of rain fell in less than 1 hour resulting in damaging flash floods (rainfall rates were likely over 4 in/hr). • Higher amounts likely over higher terrain to the NE and NW of the valley.

  3. 1145Z 08 July 1999

  4. 1145Z 08 July 1999

  5. 6-h forecast valid at 18Z ETA

  6. 1200 UTC 8 July 1999 surface analysis

  7.  Desert Rock PW=1.68” Yuma PW= 2.01” 

  8. 700 mb – green, 500 mb- red

  9. 14Z 8 July 1999

  10. 1hr radar accum 1902z

  11. Conclusions • Tropical connection • High surface dewpoints • Location of upper level high and inverted 500 mb trof • Orographics • Urbanization • Possible effects from earlier convection NE of Las Vegas?

  12. Results • Low centroid storms • Over 2 inches of rain in less than 1 hr • More rapid runoff (urban area)

More Related