STEPS
2000
JD 00153 01JUNE2000
PRELIMINARY SPRITE LOG
The following is a preliminary
listing of the times of sprites imaged at
the Yucca Ridge Field Station.
These are based on a first pass visual
inspection of the video tapes.
There may be some additional sprites not
listed . All times are UTC. Times
indicated the start time of the first
video field in which the event
is visible.
SUMMARY: The
cap unexpectedly broke in Morgan County and a moderate cell
with mostly negative CGs
continued past dark. STEPS tracked this storm, as
well as an MCS which moved in from
the southwest before dark. The real
surprise was the frontal boundary
in NE becoming active after dark. It had
a very high percent (>50%) of
positives for many hours. A cold front swept
through YRFS dropping RH and clearing
the smoke out somewhat, allowing
viewing after dark. The squall
line made a number of sprites and a rapid
sequence of elves.
Much smoke in area from fires burning
in Colorado, New Mexico and Canada.
Visibility was restricted due to
thin smoke. But very complex airmass and
dryline structure may have resulted
in regions of "clean" and "smoky" air
affecting nearby storms differently.
Reason to suspect the MCC was smoked
contaminated. No moon.
Total TLEs from Yucca Ridge This
Campaign: 153
============================================================================
(S) = Sprite; (E) = Elve;
(B) = Blue Jet; (CF/CG) = Cloud/Ground flash;
(M)=Meteor
============================================================================
JD 00153 - 01 JUNE 2000
O254. Start
LLTV Observations
0800 End
LLTV Observations
O607.09.906 [S]
0627.12.805 [E]
0641.53.984 [E]
0642.25.648 [E]
0643.12.579 [E]
647.12.01 [E]
0704.47.804 [E]
0704.47.820 [S]
0731.30.038 [E]
733.30.270 [E?]
0735.25.736 [S]
0738.07.997 [S-]
Walter A. Lyons, Ph.D., CCM
walyons@frii.com
Yucca Ridge Field Station
970-568-7664 (voice)
46050 Weld County Road 13
970-482-8627 (fax)
Fort COllins, CO 80524
970-690-0422 (PCS)