We are going to be on stand by for possible WYKA CLEX operations on Thursday, November 1, 2001. The earliest GO/NO GO decision will be at 0600 MST (1300Z). Expect earliest possible takeoff for the King Air at 0800 MST (1500Z). The target area will be operations over LBF. WEATHER DISCUSSION: A ridge is building into the CLEX area, and conditions are becoming less favorable for mid-level clouds. The 24 hour Eta model valid at 12 Z, Nov 1 indicates a weak vortmax over the NE panhandle. The NOGAPS model shows weak positive vorticity as well. Moisture is lacking in both of the model, and latest water vapor imagery shows a dry punch working into California which is forecast to be over the CLEX area Thursday morning. Due to the model's usual questionable handling of moisture and the pessimistic outlook for the remaining days of CLEX, we will go against the odds and be watching for mid-level clouds Thursday morning. OUTLOOK: Later Thursday and into Friday and Saturday the jet moves north of the CLEX region and a high pressure system becomes the dominant weather feature. Flow aloft becomes zonal and weakens. This is not favorable for CLEX clouds. John Forsythe/Jim Jones
The WYKA with Adam Kankiewicz aboard completed a 2.6 hour mission on a dissipating mid-level cloud over SE WY and Nebraska near Ogallalla. The cloud was mixed phase with a base about 17 K feet. There was cirrus above as has been a frequent occurrence during CLEX-9. John Forsythe The WYKA left Laramie this morning a 0750 MST for a mission over the Sydney, NE region. On the way east we sampled cloud with the cloud radar and recorded a vertical profile of cloud from Laramie to Kimball, NE. We observed plenty of cirrus and some wave cloud activity while flying east. At 0830 we found a cloud over Lake McConaughy that looked good enough to sample. We began a Lagrangian spiral ascent into the cloud to get an in-situ vertical profile. Cloud base was near 17 Kft (-14C). the cloud was a bit patchy and seemed to be in the dissipating phase of its lifecycle. We saw a lot of small ice (8um ave size) and found a few pockets of imbedded liquid water in the cloud. We finally found cloud top at 0903 (26 Kft and -33C). The top was very wispy and had only small ice present. We then flew west and descended back down to 16 Kft with the cloud radar in side- look mode. Down here we only saw decaying cirrus-type cloud around. We decided to head on back to Laramie. In route back, we profiled the clouds above with the cloud radar (mostly cirrus) back to the NE/WY border. We landed in Laramie at 1019 MST. Total time aloft: 2.6 hours (with about an hour of that in cloud). Adam
Sunrise Central Standard Time Begin civil twilight 6:46 a.m. Sunrise 7:15 a.m. Sun transit 12:27 p.m. Sunset 5:39 p.m. End civil twilight 6:07 p.m.