Assertion: cold front's air | /r/HasProperty | unstable
Facets:
value: conditionally
type: MANNER
value: a line of
type: OTHER
Source sentences:
text: There can be thunderstorms around the warm front if the air is unstable.
text: If the air is moist and conditionally unstable, heavy precipitation could occur over a broad area.
text: spring and summer: The air is unstable so thunderstorms or tornadoes may form.
text: If the warm air is unstable, cumuliform clouds develop.
text: When the warm air overriding a shallow front is moist and unstable, the usual widespread cloud mass forms; but embedded in the cloud mass are altocumulus, cumulus, and even thunderstorms as in figures 70 and 71.
text: Note that the associated weather is complex and encompasses all types of weather associated with both the warm and cold fronts when air is moist and unstable.
text: Generally, unless the cold air is unstable
text: If the air also is unstable, thunderstorms can develop as well.
text: If the warm air is unstable (or
text: If the warm air is moist and unstable, a line of
text: If the warm air is unstable (or conditionally unstable), thunderstorms and cumulonimbus clouds may develop within the cloud bank and may stretch for some 50 miles behind the surface front.
text: If the warm air is unstable (or conditionally unstable), thunderstorms and cumulonimbus clouds may develop within the cloud bank and may stretch for some 50 miles behind the surface front.
text: Here, the cold polar air lifts the warm one very quickly; the air is unstable.
text: if the advancing warm air is moist and unstable, altocumulus
text: However if the air on the warm side of the front is unstable, thunderstorms and showers are possible.