SPRITES'96 PRELIMINARY SPRITE LOG
JD 96187
05 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not noted and not all those below may in fact be sprites. All times are UTC.

A rather small MCS, just meeting size criteria, formed just east of Yucca Ridge at dark and tracked east and south into extreme southwestern Nebraska and northwestern Kansas, dissipating after 0700. It developed a very high percentage of positives between 0500 and 0700 UTC and launched a number of sprites. Many of these were visible on LLTV even though they occurred virtually next to the nearly full moon. Cloud cover probably prevented seeing a larger number of events.

Time to nearest second or tenths of second
(S) = sprite (E) = Elve (J) = Blue Jet

05 JULY 1996 0318 Start obs 0710 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96188
06 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

We tracked two storms which were producing sprites. The first moved very slowly through north central Nebraska. The second moved southeastward out of Montana into the Black Hills region. It gradually gained strength after 11 pm, whereas the Nebraska storm was very slowly weakening. The South Dakota storm also began to generate sprites. There was a nearly full moon, but it was not directly within the field of view. After 0700 Z altocumulus clouds began to partially obscure the view to the Nebraska storm and later the SD storm.

Time to nearest second or tenths of second
(S) = sprite (E) = Elve (J) = Blue Jet

06 JULY 1996 0437 Start obs 0830 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96189
7 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Classic formation of an MCS due to beta to alpha scale transformation. Largest cell formed immediately south of Yucca Ridge and moved east-southeast into Colorado palins by sunset, where it merged with a seocnd cell. It continued to grow slowly as it moved into Kansas. There was growth on its northern flanks at times. CG rates were modest (800-1500 per hour) but often as many as 15-25% +CGs.

Time to nearest second or tenths of second
(S) = sprite (E) = Elve (J) = Blue Jet

07 JULY 1996 0345 Start obs 0900 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96193
11 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

An advancing cold front from Minnesota to Wyoming resulted in tornado watches being posted for North Dakota and South Dakota for much of the night. Two large MCS in North Dakota early in the evening most likely had sprites, but thin haze near the ground due to the recent heavy rains made long range viewing difficult. New convection formed in northeastern Wyoming and northwestern South Dakota by 0500Z and they developed sprites, which became increasingly visible as the storms moved south and the haze cleared away.

Time to nearest second or tenths of second
(S) = sprite (E) = Elve (J) = Blue Jet

11 JULY 1996 0306 Start obs 0900 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96195
13 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Severe weather developed along the Front Range from YRFS south into New Mexico. The southern part of the system slowly moved eastward into Kansas where it weakened and died. It had many positives CGs and most likely sprites. Unfortunately small intense cells, associated with tornadoes, severe downbursts and flash floods lingered on in the immediate Front Range area from Greeley south towards Colorado Springs much of the night. These were electrically active, but too small to make sprites. They also blocked the view of the larger system. Brief clearing allowed sprite observations from a cell in northwest Kansas for a half our or so before clouds and weakening storms warranted a shut down.

Time to nearest second or tenths of second
(S) = sprite (E) = Elve (J) = Blue Jet

13 JULY 1996 0306 Start obs 0650 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96199
17 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Intense localized thunderstorms picked the Ft. Collins area to sit on until after 05Z, and then their debris clouds slowly moved east-northeast blocking the view of sprite systems in South Dakota and a massive storm system in extreme eastern Nebraska and western Iowa. We finally we able to see into the Nebraska/Iowa system before the satellite coverage ended and do have one confirmed sprite and one elve.

Time to nearest second or tenths of second
(S) = sprite (E) = Elve (J) = Blue Jet

17 JULY 1996 0521 Start obs 0901 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96201
19 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Several small but intense storms formed in extreme eastern Colorado. These produced a large number of sprites. More would have been logged save for some periods of obscuring clouds. A second storm in the Panhandle also was spiriting. New Mexico was able to track the sprites from this storm, as did Wyoming later in the evening. YRFS saw a few of the Panhandle sprites was mostly blocked by clouds. These storms were among the smaller cells we have seen produce sprites.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

19 JULY 1996 0309 Start obs 0830 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96203
21 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Small storms formed in eastern Colorado and provided a nice lightning show but were too small to make sprites. A much larger MCS in South Dakota generated a very large number of sprites and elves from 0640Z through sunrise (1015Z) under ideal viewing conditions. Alaska imaged at least events. The Phillips Lab and New Mexico LLTVs were not tracking this storm. Most events have both wide field and close up images.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

21 JULY 1996 0312 Start obs 1015 End Obs

0640.27 [S] 0715.XX [S?] 0714.4x [S] 0719.16 [S] 0719.30 [S] 0720.30 [S] 0720.40 [S] 0722.16 [S+] 0723.30 [E] 0724.15 [S] 0725.19 [E] 0729.16 [E] 0729.4X [S] 0731.44 [S] 0732.05 [E] 0732.20 [S] 0732.41 [S] 0733.38 [S+] 0736.34 [S+] 0737.18 [E+] 0737.47 [E+] 0738.2X [S] 0738.3X [S+] 0739.XX [E] 0739.XX [E] 0741.1X [S] 0742.2X [S] 0743.25 [S] 0745.09 [S] 0749.05 [S] 0751.05 [S+] 0751.24 [S] 0751.33 [S] 0752.16 [S] 0752.56 [S] 0753.33 [S] 0753.43 [S]

0755.12 [S] 0759.28 [S] 0755.44 [S] 0756.08 [S] 0756.40 [S] 0756.57 [S] 0757.35 [S] 0758.14 [S] 0759.13 [S] 0800.38 [S] 0801.08 [S] 0801.27 [S] 0802.41 [S] 0802.51 [S] 0803.37 [S] 0803.51 [S] 0804.12 [S] 0805.01 [SE] 0805.40 [S] 0806.33 [S] 0807.12 [S] 0807.32 [S] 0808.08 [S+] 0809.41 [S+] 0810.28 [S] 0810.59 [S] 0811.56 [S] 0813.16 [S] 0813.20 [S] 0813.48 [S] 0814.22 [S] 0815.46 [S] 0816.38 [S] 0817.27 [S] 0817.57 [S] 0818.29 [S] 0819.28 [S]

0820.30 [S] 0822.01 [S] 0822.21 [S] 0823.09 [S] 0823.43 [S] 0824.10 [E] 0824.33 [E] 0824.43 [S] 0825.48 [S] 0826.02 [S] 0826.24 [S] 0828.26 [S] 0828.28 [S] 0828.33 [SE] 0829.21 [S] 0830.14 [S] 0830.56 [S] 0831.46 [S] 0832.08 [SE] 0832.58 [S] 0834.26 [S+] 0835.34 [S] 0835.35 [S] 0836.54 [S] 0838.16 [S] 0838.54 [S] 0839.39 [S] 0840.46 [S] 0840.52 [S] 0841.56 [S] 0842.52 [S] 0843.45 [S] 0841.22 [S+] 0846.12 [S] 0847.19 [S+] 0848.42 [S] 0849.18 [S]

0849.42 [S] 0850.10 [S] 0851.45 [S] 0852.26 [S] 0854.11 [S] 0855.25 [S] 0856.10 [S] 0857.16 [S] 0857.56 [S] 0900.20 [S] 0902.14 [S+] 0904.15 [S] 0907.07 [S] 0909.52 [S+] 0910.58 [S] 0912.42 [S+] 0916.18 [S+] 0917.04 [S] 0921.07 [SE] 0921.39 [S?] 0925.35 [S] 0929.39 [S] 0930.45 [S] 0936.03 [S] 0938.12 [S] 0940.38 [S+] 0943.43 [S+] 0946.19 [S] 0949.46 [S] 0955.05 [S] 0958.04 [S] 1000.12 [S] 1003.33 [S] 1006.24 [S+] 12.24 [S]

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96204
22 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Excellent viewing conditions again. Large MCS forms in Kansas and gradually moves east and slightly north. It produced a steady stream of sprites and elves especially from the northern part of the trailing stratiform region. Also smaller cells trailed back into eastern Colorado, but these were too small for sprites. Events were tracked by Yucc Ridge, Wyoming and New Mexico for several hours.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

22 JULY 1996 0257 Start obs 0830 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96206
24 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Excellent viewing conditions again. A banner night. Large MCS (bow echo) moves southeast into TX Panhandle and Oklahoma. Many huge sprites-some visible to naked eye at 500 km. Bright tendrils. Much evidence of 'blue'. Some excellent elves. Saw sprites from small cell in eastern New Mexico. CGRO and OTD overpasses. Imaged by all three sites.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

24 JULY 1996 0300 Start obs 0910 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96208
26 JULY 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Active MCS systems in Wyoming, Kansas and New Mexico. All appeared to have sprite potential. Unfortunately clouds pretty well obscured these systems from both Yucca Ridge and Jelm. New Mexico Tech was unable to deploy a camera. We may have caught two sprites through the clouds early in the evening. VLF indicated many sprites were occurring.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

26 JULY 1996 0302 Start obs 0515 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96214
01 AUGUST 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Severe weather along the Front Range during the afternoon. This time the cells moved out into the Plains and clearing skies provided excellent viewing. A small cell in the foreground for a while blocked view of large MCS in Kansas. After a while a large number of sprites were seen from the Kansas cell. New Mexico Tech also imaged on their LLTV. Good photometer data obtained by Russ Armstrong.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

01 AUGUST 1996 0337 Start obs 0907 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96217
< 04 AUGUST 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Severe weather along the Front Range during the afternoon and into the night. Long NE-SW squall lines. Have several sprite centers including some rather close in to north. Could see some visually. Los Alamos group working with red and blue LLTVs.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

04 AUGUST 1996 0250 Start obs 0653 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96218
05 AUGUST 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Severe weather east along the Front Range during the night. Long NE-SW squall line forms into huge MCS stretching from northeast Colorado into Minnesota. Have several sprite centers including some rather close in to east. Could see many of them visually. LANL working with red and blue LLTVs.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

05 AUGUST 1996 0250 Start obs 0630 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96220
07 AUGUST 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

A huge frontal squall mesosystem extended from Eastern Colorado in a big comma up into Minnesota. The view of the western end was blocked by low clouds for several hours. Clearing allowed 70 sprites and elves to be imaged after 0553Z.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

07 AUGUST 1996 0410 Start obs 0813 End Obs

SPRITES'96 PRELIMINARY SPRITE LOG
JD 96223
10 AUGUST 1996

The following is a very preliminary listing of the times of sprites imaged at the Yucca Ridge Field Station. These are based solely on real-time visual inspection of the video monitoring system. There are probably some additional sprites not listed and not all those below may in fact be sprites. All times are UTC.

Final night of observations for SPRITES'96. Squall line in southwestern Nebraska was spriting at nightfall. Observations terminated at 0600 UTC as rate decreased.

Time to nearest second, tenths or hundreds of a second
(S) = sprite (E) = Elve (J) = Blue Jet (CF) = cloud flash

10 AUGUST 1996 0242 Start obs 0602 End Obs