Hydrologic Outlook


FGUS75 KPSR 281833
ESFPSR
AZZ530>563-CAZ560>570-291300-

Hydrologic Outlook
National Weather Service Phoenix AZ
1133 AM MST Fri Sep 28 2018 /1133 AM PDT Fri Sep 28 2018/

...Heavy Rain Possible Sunday night through Tuesday...

* What: Heavy rain. Widespread amounts of 1 to 2 inches with
  localized amounts up to 4 inches are possible.

* Impacts: Localized flooding causing some roads to be impassable.
  Local washes and waterways may exit their banks and impact
  nearby structures.

* Confidence: High on potential for rain. Medium on timing,
  locations, and amounts.

* Where: Across the Southwest US, including south-central and
  southwest Arizona and southeast California. This includes
  Phoenix, Yuma, Globe, and Casa Grande in Arizona, and the
  Imperial Valley in California.

* When: Beginning Sunday night and continuing through Tuesday.

* Summary: Abundant moisture associated with a tropical system
  will move northward into the Southwest US. Meanwhile, a low
  pressure system will move through California and the Four
  Corners states. This setup will cause widespread rain to
  develop. Rain rates may be quite high at times, in excess of 2
  to 4 inches per hour, which will have the potential to cause
  localized flooding. Due to the duration of the event, the
  potential exists for more widespread flooding to occur.

Continue to monitor forecasts for updates as this situation
unfolds. Follow NWS Phoenix on Facebook at
www.facebook.com/NWSPhoenix and on Twitter at
www.twitter.com/NWSPhoenix.

$$