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Spatial distribution of the WRF stratospheric tracer at 390 m above ground level at (A) 1000 hours PST on April 30, (B) 0000 hours PST on May 1, (C) 0500 hours PST on May 1, (D) 1600 hours PST on May 2, (E) 0000 hours PST on May 4, and (F) 1400 hours PST on May 5 (all 2014). The black stars indicate the location of San Diego.
