Explaination of Chase Codes


No Status

Chasing is not anticipated.


Status 1

Students and faculty members will monitor models and maps to anticipate possible severe weather outbreaks at least a day in advance. If the conditions are right, then a Code Yellow will be declared. The most likely time for the issuance of a Code Yellow is the day before the possible chase. However, this is flexible, and may be issued the morning of the chase, or a few days prior.

Once a Code Yellow is issued, other members of the team will be contacted via telephone and email. Thus it is essential that members check their voice mail / answering machines and email accounts frequently if a possible chase situation exists.

A briefing will be given at 8:00 a.m. on the morning of the possible chase after map and model analysis is completed. After analysis of the conditions, the forecasters will make a reccommendation whether the status is "GO," "NO GO," or "STAND BY." If the status is "STAND BY," a time will be set for which a final decision is to be made. If the status is "GO," a departure time and target area will be set. The team will then move to Status 2 (Code Red).


Status 2

Once a Code Red is issued, the conditions have been determined to be favorable for severe weather. A short briefing will be held prior to departure time, giving a synopsis of the situation. At this time the base team and field team(s) will be formed. Please note that the base team should have at least 2 people. The field team(s) will travel to the target area designated earlier.


Status 3

Once a Code Green is issued, the field team(s) will be departing and the base team will remain in the Map Room. The base team will monitor the situation using radar, satellite, etc. and be able to give updates to the field teams as necessary. It is the duty of the base team to guide the field team(s) to the location of the most promising convection. A map of the target area will be provided for the base team.

The current Chase Code Status will always be posted on the door of room 1-74 in the Ag Building.

Copyright 2003-2011 . Atmospheric Science Program . University of Missouri-Columbia