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ALSACAT is my comprehensive catalog of UFO sighting reports in Alsace, the region is the North-East of France, whether they are "explained" or "unexplained".

The ALSACAT catalog is made of case files with a case number, summary, quantitative information (date, location, number of witnesses...), classifications, all sources mentioning the case with their references, a discussion of the case in order to evaluate its causes, and a history of the changes made to the file. A general index and thematic sub-catalogs give access to these Alsatian case files.

Case in the Bas-Rhin, on June 1, 2001:

Case number:



Francis, from the Bas-Rhin, reported by email to the Swiss ufology group GREPI, that on Sunday, June 1st, 2001, at 4 p.m., there was a sighting of "a weather balloon or a UFO" above his village.

He indicates that the thing was of spherical shape, of white color, that there was no noise, no contrail, that the flight was constant, the speed also constant, and it flew from the Northeast to the Southwest.

He wondered if it was a weather balloon or something else, and if other witnesses of the phenomenon could provide more information.


Temporal data:

Date: June 1, 2001
Time: 04:00 p.m.
Duration: ?
First known report date: 2001
Reporting delay: Hour, months.

Geographical data:

Department: Bas-Rhin
City: ?
Place: Above witness village, UFO in the sky.
Latitude: 48.654
Longitude: 7.564
Uncertainty ratio: 50 km

Witnesses data:

Number of alleged witnesses: 1
Number of known witnesses: 1
Number of named witnesses: 0
Witness(es) ages: ?
Witness(es) types: Male.

Ufology data:

Reporting channel: Email to the Swiss ufology group GREPI.
Type of location: Above witness village, UFO in the sky.
Visibility conditions: Day
UFO observed: Yes
UFO arrival observed: ?
UFO departure observed: ?
Entities: No
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: Weather balloon or UFO.


Hynek: DD
ALSACAT: Possible weather balloon.



Sunday, June 1, 2003, 4 p.m.. Observation of a weather balloon or ufo, above my village, spherical, white, no noise, no contrail, constant travel, heading followed: northeast / southwest, constant speed.

Weather balloon or something else? If other witnesses of the phenomenon can tell you more about it, thank you.

Francis (Bas-Rhin - France)


The witness tells that it could have been a weather balloon, so it is hard to exclude that it was a weather balloon.


Possible weather balloon.

Sources references:

* = Source is available to me.
? = Source I am told about but could not get so far. Help needed.

File history:


Main author: Patrick Gross
Contributors: None
Reviewers: None
Editor: Patrick Gross

Changes history:

Version: Create/changed by: Date: Description:
0.1 Patrick Gross December 18, 2014 Creation, [gri1].
1.0 Patrick Gross December 18, 2014 First published.

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This page was last updated on December 18, 2014.