JD: 00-196 DoW: THU/FRI UTC Date: 14JULY2000

SUMMARY: Null Case 90% Positive Supercell in SD

TLE PREDICTION: 0.12 (0.2x0.6)

RESULTS: 0, many ICs many +CGs but no sprite

LESSONS: fits model of spriteless small supercells in spite of +CG rate

PERSONNEL: Lyons, Nelson, Fossum, Nordem, Gerken

STEPS STATUS: STEPS on standby

YRFS OPERATION LOGS: Partial operations. Little CAPE to work with under 500 mb ridge. Mountain convection weak and sends some debris clouds which generally dissipate. Excellent viewing. Full moon. Small cell developed over Black Hills and moved slowly southeast thru SD into Nebraska by 0500Z. It had up to90% positive at times, hail, and tops to 55000 ft. Could clearly see illuminated clouds at 350-400 km. No sign of sprites. Storm was rather long lasting. We didn’t follow to bitter end so it is at least possible it made a sprite after video stopped at 0530Z. Took GEN III (and S-VHS) and zoom Xybion red. No other sensors deployed.

STEPS OPERATIONS: STEPS on standby

KEY RESULTS : Useful as proof that small 90% positive supercells don’t make sprites

Total TLEs from Yucca Ridge This Campaign: 950+

FMA

Red Xybion (A)-Patrol: 0 tapes

Sony TRV900 3CCD: time lapse of late storm ;

GEN III unit; 1 DV tapes; TL of clouds plus lightning; 1 S-VHS

JVC KY-19: shoot daytime TL/STEPS Cam (to ESE);

Pulnix CCD: shoot various TL scenes;

Photodiode: available

Winckler PMT: available

GPS: OK

WWV Source: OK

VLF Inspire: only audio

ELF N-S: not available

ELF E-W: not available

NLDN Live: OK

NLDN Paper: 2 maps

NLDN Archive: 2 saves

MRC Data Acquisition: available

FMA Data Acquisition: not available

Thunder Mic: available

LANL Tracker: OK

Red Xybion (B)-Zoom; 2 tapes

Red Xybion (C)-Tele: 0 tapes-on tracker

Blue Xybion(D)-zoom: 0 tapes - problems with focus

Mountain Cam: nominal

STEPS Cam: nominal

Shure Mic: OK

NEXRAD Archive: Revised EDIS;

GOES Archive: OK

RUC2 Archive: OK

STANFORD/STAR LAB:

Telescope available

LLTV available

ELF/VLF/PMT available

UTAH STATE UNIVERSITY:

Xybion GEN III (6 deg FOV) available

White or blue

CCD, Medium FOV OH imager available

Gravity waves/sprites

MIT ELF: operational

FUELLEKRUG ELF: operational

ISRAELI ELF: nominal