ASOS reported WX clear when thunderstorm clouds were observed above the airport.

Attributes
ACN	345360
Time
Date	199608
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pub
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Person 1
Affiliation	government : faa
Function	controller : local
Experience	controller non radar : 4 controller radar : 2
ASRS Report	345360
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

A thunderstorm, with level 5 WX, was 10 mi west of the airport moving east (toward airport). Clouds associated with the cell created an overcast layer above the airport. ASOS reported the WX as clear, visibility 10 SM. This was not very representative of the WX at the time.

Original NASA ASRS Text

Title: ASOS RPTED WX CLR WHEN TSTM CLOUDS WERE OBSERVED ABOVE THE ARPT.

Narrative: A TSTM, WITH LEVEL 5 WX, WAS 10 MI W OF THE ARPT MOVING E (TOWARD ARPT). CLOUDS ASSOCIATED WITH THE CELL CREATED AN OVCST LAYER ABOVE THE ARPT. ASOS RPTED THE WX AS CLR, VISIBILITY 10 SM. THIS WAS NOT VERY REPRESENTATIVE OF THE WX AT THE TIME.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.