Hazardous operations 131630Z to 140200Z mar, alternate 141630Z to 150200Z mar in area bound by 32-56.68N…

Original warning text

EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS 131630Z TO 140200Z MAR,
   ALTERNATE 141630Z TO 150200Z MAR
   IN AREA BOUND BY
   32-56.68N 122-01.97W, 33-41.80N 120-28.97W,
   33-45.10N 120-10.98W, 33-45.00N 119-51.27W,
   33-38.23N 119-13.95W, 33-19.85N 119-05.07W,
   32-59.62N 119-34.57W, 32-42.28N 119-38.52W,
   32-36.62N 119-55.75W, 32-34.98N 120-14.83W,
   32-47.87N 121-59.50W.
2. CANCEL THIS MSG 150300Z MAR 24.

Activity windows · 2 in this warning

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.