Hurricane Rosa Remnants in Phoenix, Arizona: Flood Warnings and Watches, Accidents, School Closings

The remnants of Hurricane Rosa brought heavy rains that caused extreme flooding in the west, especially in Arizona. Utah and Nevada were also getting the rain remnants of Rosa.

Tuesday morning the rain was falling hard across Arizona accumulating nearly two inches in a matter of hours. The rain started slow Monday but in areas that lack the drainage systems that many other areas across the country where rain is more common have, a few inches are enough to cause chaos.

Maricopa County, including Phoenix, was under a flash flood warning Tuesday morning, meaning the flood was either imminent or already happening. That warning was in effect until 11:15 a.m. MST, according to an alert from the National Weather Service.

Flash flood watches remained in effect across the broader region through all of Tuesday and overnight. The watch means there was the possibility of flooding in drainage areas and creeks and those in at-risk areas should be on alert and paying attention to forecasts. The storm was expected to bring a period of rain and then thunderstorms to a large area across the state through Wednesday which could bring flood conditions on in a short amount of time.

flash flood watch tuesday map
The map of the areas under a flash flood watch Tuesday through Wednesday morning in Arizona. National Weather Service

The detailed forecast and watches, warnings and advisories are available on the NWS website, a good resource for anyone in the area looking to track the conditions.

Flooded roads and accidents were snarling traffic and some schools were even closed due to the rains and subsequent flooding Tuesday. Desert Horizon Elementary School along with Rainbow Valley Elementary School and Rio Vista Elementary School were all closed Tuesday, KNXV reported.

Some roads were closed across the area, Maricopa Police tweeted a photo of flooded Honeycutt Road covered in water. The Arizona Department of Transportation was sharing the latest traffic updates as well as updates on accidents across the areas getting the worst of the rains.

Honeycutt Rd is closed between Porter Rd & White and Parker Rd, due to flooding. #CopaTraffic

— Maricopa Police Dept. (@MPDPIO) October 2, 2018

Tropical Storm Rosa, which at one point strengthened to hurricane status, brewed in the Pacific for days before it made its approach to the area of Baja, California, and then moved inland in the direction of Arizona.

Even though only the remnants were raining out over the state, it was still enough to possibly break records. On Tuesday, the second day of the month, Sky Harbor International Airport in Phoenix already had a total of 2.15" of rain for the month. When ranked against the Octobers with the most precipitation, this year's was already in seventh place just two days in, according to the NWS Phoenix office.