minor trough

minor trough

[′mīn·ər ¦trȯf]
(meteorology)
A pressure trough of smaller scale than a long-wave trough; it ordinarily moves rapidly and is associated with a migratory cyclonic disturbance in the lower troposphere.
References in periodicals archive ?
The Swede is going through a minor trough but those who think she may have sated all her ambitions and reckon she's on her way out might just be in for a shock.
I wouldn't say British sitcoms are in rude health - they are in a minor trough rather than a crisis.