Visible Satellite Imagery
showing the convection along the outflow boundaries.
When the boundaries collided to the south and east of Riverton,
additional thunderstorms developed and were very impressive,
looking at the storms visibly from the
National Weather Service office in Riverton and with the
RADAR imagery. One hour lightning plots at
7 PM and
8 PM show where the main
activity was from 6-7 PM and from 7-8 PM, respectively.
With the storms to the south and east and clearing to the west,
the sun managed to peek through and provide Riverton with a nice rainbow.
The Storm Total Precipitation Estimate ending at 8:20 PM
indicates several areas of heavy precipitation. The initial storms that formed along the
boundary collision were located to the southeast of Riverton near Sand Draw and Highway 135.
RADAR estimates for that area are in the 1.5 to 2 inch range. To the north of Lysite
northeast of Riverton), RADAR estimates reached a maximum of 3 to 3.5 inches.
Mr. Ralph Bradock, who lives 10 miles north of Lysite at the base of Lysite Mountain,
reported a precipitation total of 1.32 inches and 2-3" of large pea size hail.
If you have any comments or questions about this news story,
please contact Brett McDonald, Science and Operations Officer,
or another member of the NWS Riverton WY WFO staff at 307-857-3898.
This page was last updated on 10/16/04.