From Halopedia, the Halo wiki

For articles of the same name, please see Winter Contingency (disambiguation).

"WINTER CONTINGENCY has been declared. All units are mobilized and ready."
— UNSC operator[1]

WINTER CONTINGENCY is an official United Nations Space Command emergency plan that deals with situations where Covenant forces have become aware of, or are present at, a human colony world. It was first mentioned in the UNSCDF Instruction EM-277 on March 10, 2526.[2] On Reach, WINTER CONTINGENCY was supplemented by the WINTER CONTINGENCY Declaration Supplemental Orders, a series of additional directives for ONI agents.[3]


Events which may be classified as WINTER CONTINGENCY include:

  • Intercepted Covenant communications that refer to a UNSC colony by name.
  • Discovery of hard physical evidence of Covenant activity.
  • Detection of multiple in-system slipstream space rupture events.
  • Engaged in combat by Covenant forces.


"As per the Winter Contingency, we are countering on every front."
Auntie Dot[4]

WINTER CONTINGENCY holds the highest precedence in the OPREP-Γ reporting structure. All other reporting terms such as GOOSE CHASE, SNAKE PIT, and others, while very important, are considered secondary to a WINTER CONTINGENCY report.

List of appearances[edit]