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Kitt Peak Nightly LTO Report For UT: 2026-11-01

Report Time (MST): 03:27                    For access to all LTO-Reports go to: http://www-kpno.kpno.noirlab.edu/cgi-bin/ltoreport

4 Meter Weather Averages
From: UT = 01:00 (MST=6:00 PM) To: UT = 13:00 (MST=6:00 AM)

Elements	Mean	High	Low	AvDev
Air Temperature (°C)	11.5	12.4	9.1	0.6
Dewpoint Temperature (°C)	11.4	12.4	9.1	0.6
Relative humidity (%)	100	100	98	0.1
Wind Speed (mph)	114.9	114.9	114.9	0.0
Wind Direction (°)	0	0	0	0.0
4M Dome Temperature (°C)	12.8	13.0	12.6	0.1
4M Dome Dewpoint (°C)	11.0	11.7	9.9	0.5
4M Primary Mirror (°C)	14.5	14.6	14.3	0.1

Weather Comments:	Threatening clouds, rain, fog, high humidity all night. After midnight winds became very high; guessing 45-60mph, or higher.
Recognized Hours:	( 10.75 )      18 degree twilight + 0.5 hr.

Observer Information

Telescope	Observer	Prop. #	Instrument	Detector	Seeing
4 Meter	LO: Landriau; SO: Raina (all night, on-site)	---	DESI	N/A	N/A
WIYN	Everett	2026B-300002/2026B-300001	NESSI	N/A	N/A
2.1 Meter	No Observer	---	---	N/A	N/A
Feed	No Observer	---	N/A	N/A	N/A
0.9 Meter	No Observer	---	---	N/A	N/A

Time Usage During The Night

Telescope	Hours Used	Night's Activity		Hours Lost	Time Lost Due To:	Time of Night (MST)
4Meter
	0	Scientific Research		10.75	Weather	18:30 - 05:30
WIYN
	0	Scientific Research		10.75	Weather	18:30 - 05:30
2Meter
	10.75	Shutdown		0	Weather
Feed
	0	Scientific Research		0	Weather
W0_9m
	10.75	Shutdown		0	Weather

Observing Status

4 Meter	DESI Survey observing tonight. Closed all night due to weather. No seeing measurements taken.
WIYN	NESSI Queue observing scheduled tonight. Closed all night due to weather. No seeing measurements taken.
2.1 Meter	Not Scheduled
Feed	Not Scheduled
0.9 Meter	Not Scheduled

Comments	It was a stormy night. Winds really picked up after midnight.

Reported by:	Doug Williams

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