Hazardous operations 241600Z to 250100Z jul, alternate 1600Z to 0100Z daily 27 thru 29 jul in areas bound…

Original warning text

EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS 241600Z TO 250100Z JUL,
   ALTERNATE 1600Z TO 0100Z DAILY 27 THRU 29 JUL
   IN AREAS BOUND BY:
   A. 33-16.00N 119-29.00W, 33-18.00N 119-27.00W,
      33-20.00N 119-31.00W, 33-19.00N 119-37.00W,
      33-17.00N 119-38.00W, 33-14.00N 119-38.00W,
      33-12.00N 119-36.00W, 33-10.00N 119-31.00W,
      33-10.00N 119-30.00W, 33-13.00N 119-30.00W.
   B. 33-25.99N 119-49.01W, 33-28.03N 119-48.30W,
      33-40.63N 120-09.68W, 33-40.30N 120-14.80W,
      33-37.80N 120-18.23W, 33-42.90N 120-28.84W,
      33-35.08N 120-34.33W, 33-31.20N 120-26.33W,
      33-24.38N 120-34.57W, 33-15.95N 120-23.83W,
      33-14.10N 120-14.08W, 33-15.92N 119-59.35W,
      33-10.39N 119-48.13W, 33-09.10N 119-37.37W,
      33-11.98N 119-33.19W, 33-13.95N 119-32.36W,
      33-16.30N 119-30.38W, 33-19.70N 119-33.19W,
      33-23.03N 119-42.80W.
2. CANCEL THIS MSG 300200Z JUL 23.

Activity windows · 4 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.