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Weather Update

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  • 1. Dan Leins National Weather Service To dial in: 1-888-547-5916 Passcode: 218896#
  • 2. Currently Image showing mid level atmospheric moisture at 12pm MST Wednesday Strongest storm of the week still offshore Storm is moving to the southeast Rain beginning to move into southeast California Storm is slow moving and will not fully arrive until late Thursday night L
  • 3. Tonight
    • Rain will re-develop from west to east
    • Rain developing by early evening in California
    • Rain developing by late evening across Arizona/Phoenix area
    • Rain amounts expected:
    • 1/4” to 1/2” Phoenix metro, north Maricopa County
    • ~1/4” southern Gila County
    • 1/2” to 1” Imperial/eastern Riverside Co.
  • 4. Thursday and Thursday night
    • Storm moves onshore…rain spreads across all of southern California and Arizona
    • This will be the biggest impact storm of the multiple storms we have seen this week
    • Near record precipitation expected
    Rainfall forecast 5am MST Thursday – 5am MST Friday
  • 5. Friday
    • Storm begins to exit the area
    • Rain will continue but will be tapering off in the west
    • Periods of heavy rain will continue across the greater Phoenix area…but will begin to diminish late in the day
    Rainfall forecast 5am MST Friday – 5pm MST Friday
  • 6. Impacts – Flooding and Winds
    • Rivers, creeks, washes, streams flooding
    • Possible flash flooding in convective bands and thunderstorms
    • Winds will be extremely strong starting late tonight through Friday morning (30-40mph sustained winds with higher gusts likely)
    • Snow may be a possibility but not likely until late Friday and only in the highest terrain east of Phoenix
    • Anticipate significant transportation problems:
      • Road closures
      • Water accumulating on roadways
  • 7. Watches in effect
    • High Wind Watch already in effect for all areas
    • Flash Flood Watch in place for LaPaz, Maricopa, southern Gila, and northwest Pinal Counties
    • Monitor http://www.weather.gov/phoenix for latest forecasts/watches/warnings
  • 8. Questions? National Weather Service Phoenix 602-275-7004 [email_address]

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