Las Vegas Event 8 July 1999
description
Transcript of Las Vegas Event 8 July 1999
![Page 1: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/1.jpg)
Las Vegas Event 8 July 1999Las Vegas Event 8 July 1999
Jennifer H. Maxwell
![Page 2: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/2.jpg)
Las Vegas Flash FloodsLas 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.
![Page 3: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/3.jpg)
![Page 4: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/4.jpg)
1145Z 08 July 1999
![Page 5: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/5.jpg)
1145Z 08 July 1999
![Page 6: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/6.jpg)
6-h forecast valid at 18Z ETA
![Page 7: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/7.jpg)
1200 UTC 8 July 1999 surface analysis
![Page 8: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/8.jpg)
Desert Rock PW=1.68”
Yuma PW= 2.01”
![Page 9: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/9.jpg)
700 mb – green, 500 mb- red
![Page 10: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/10.jpg)
![Page 11: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/11.jpg)
14Z 8 July 1999
![Page 12: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/12.jpg)
![Page 13: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/13.jpg)
![Page 14: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/14.jpg)
1hr radar accum 1902z
![Page 15: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/15.jpg)
ConclusionsConclusions
Tropical connectionHigh surface dewpointsLocation of upper level high and inverted
500 mb trofOrographicsUrbanizationPossible effects from earlier convection NE
of Las Vegas?
![Page 16: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/16.jpg)
ResultsResults
Low centroid storms Over 2 inches of rain in less than 1 hrMore rapid runoff (urban area)
![Page 17: Las Vegas Event 8 July 1999](https://reader036.fdocuments.us/reader036/viewer/2022062409/568147c7550346895db5089c/html5/thumbnails/17.jpg)