The Weather Prediction Center

College Park, MD

Storm Summary Message

Storm Summary Number 5 for Heavy Rainfall Associated with Rosa
NWS Weather Prediction Center College Park MD
200 PM PDT Tue Oct 02 2018

...The heaviest rainfall associated with Rosa will wind down
tonight across the Four Corners region...

Flash flood warnings, flood warnings and flood advisories are in
effect for parts of Arizona.

Flash flood watches extend across much of the Desert Southwest,
northward into the Great Basin and eastward into western Colorado.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see

At 100 PM PDT...the remnant surface low of Rosa was located in the
northern Gulf of California, but its mid-level remnants were
located over northeastern Arizona moving northeastward toward the
central Rockies. National Weather Service radars showed light to
moderate rain over central and northeastern Arizona, eastern Utah
and western Colorado tied directly with the remnants of Rosa.
Meanwhile, isolated to scattered thunderstorms were located across
other parts of the Southwest and Great Basin, partially fueled by
moisture tied to the remnants of Rosa.

...Selected preliminary Storm Total Rainfall in inches from 800 AM
PDT Sun Sep 30 through 100 PM PDT Tue Oct 02...

AJO 0.4 W                             5.42                    
PISINEMO                              3.42                    
SASABE                                2.68                    
PHOENIX/SKY HARBOR                    2.63                    
SCOTTSDALE AIRPORT                    2.30                    
GILA BEND (AAF)                       2.16                    
YUMA 13.8 ESE                         2.05                    
DURHAM WASH                           1.91                    
RIO RICO 9 NNW                        1.75                    
KEYSTONE PEAK                         1.57                    
TUSCON 10.7 WNW                       1.55                    
PHOENIX 10.2 S                        1.54                    
FLAGSTAFF PULLIAM AIRPORT             0.88                    

Over the next 12-24 hours, the remnants of Rosa will continue to
weaken as they advance off toward the central Rockies. Additional
rainfall of up to an inch, locally higher in areas of mountainous
terrain, can be expected through Wednesday morning for portions of
Arizona into the Four Corners region. However, given heavy rain
over the past 2 days across Arizona and anomalous moisture in
place over the Southwest, a Moderate Risk of excessive rainfall
remains over central Arizona with a Slight Risk over the rest of
Arizona into portions of the Great Basin. 

The next storm summary will be issued by the Weather Prediction
Center at 800 PM PDT. Please refer to your local National Weather
Service office for additional information on this event.


Last Updated: 451 PM EDT TUE OCT 02 2018