Hurricanes and the monsoon

Posted: Updated:
A hurricane in 2014 forced schools to close and vehicles were flooded on freeways in the Valley. (Source: 3TV/CBS 5) A hurricane in 2014 forced schools to close and vehicles were flooded on freeways in the Valley. (Source: 3TV/CBS 5)
(3TV/CBS 5) -

Monsoon season is our most active time of year for weather in Arizona. 

Monsoon means “season” and signifies a seasonal shift in wind that brings moisture into our region from the south and east, rather than the normally dry air we get from the westerlies.

[SPECIAL SECTION: Arizona Monsoon 2017]

But during the months of August and September, we occasionally get an extra “boost” of moisture from the tropics. As hurricane season ramps up in the eastern Pacific, storms that hit western Mexico and the Baja Peninsula sometimes push additional moisture toward Arizona. While we don’t get the actual “hurricanes” or “tropical storms,” their remnants can mean a mess for Arizona.

[RELATED: Hurricanes: Storms like no other]

Remember that storm in September of 2014 that put freeways underwater, closed schools for the day and flooded entire neighborhoods? That was a result of the remnants of Hurricane Norbert. 

[READ MORE: Mesa mayor: Flooding looks like a 'mini-Katrina' (Sept. 5, 2014)]

It set a record for our wettest day EVER in the Valley! We picked up 3.30 inches of rain that day, much of it overnight and into the early morning hours. We picked up 5.11 inches of rain that September and that monsoon season totaled 6.34 inches, our seventh-wettest on record.

[SPECIAL SECTION: Weather blogs]

MOBILE/APP USERS:  Click here to see ADOT's image of freeways underwater after the 9/8/14 storm

Occasionally, tropical systems in the Atlantic can impact Arizona with moisture, but mainly we look to the storms in the eastern Pacific that can leave us with a “juiced up” atmosphere. 

That boost of moisture increases the threat for heavy rain. We’re most at risk for this in August and September, so count on the 3TV and CBS5 team of meteorologists to keep you updated through the rest of monsoon AND hurricane season!

3TV and CBS 5 meteorologists on Twitter

@AshleeDeMartino | @PaulHortonCBS5 | @royalnorman | @KimQuintero | @SchwartzTV | @aprilwarnecke 

[azfamily.com Weather Tools: Rain Totals | Interactive Radar | Blog: Weather Discussion | Alerts/Warnings | 360 Camera Network]

Click/tap here to download the free azfamily mobile app.

Copyright 2017 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.


  • Arizona's Family Weather BlogMore>>

  • Don't miss the Perseid meteor shower this weekend

    Don't miss the Perseid meteor shower this weekend

    Tuesday, August 7 2018 1:05 PM EDT2018-08-07 17:05:19 GMT
    (Source: NASA)(Source: NASA)
    Don't miss the Perseid meteor shower this weekend. (Source: NASA)Don't miss the Perseid meteor shower this weekend. (Source: NASA)

    This weekend, once the sun sets, head outside and check out the Perseid meteor shower.   

    More >

    This weekend, once the sun sets, head outside and check out the Perseid meteor shower.   

    More >
  • Before you had live radar in the palm of your hand, there were weather kiosks

    Before you had live radar in the palm of your hand, there were weather kiosks

    Tuesday, August 7 2018 1:05 PM EDT2018-08-07 17:05:09 GMT
    (Sources: National Archives and Library of Congress)(Sources: National Archives and Library of Congress)
    (Sources: National Archives and Library of Congress)(Sources: National Archives and Library of Congress)

    The high-tech way of disseminating weather information in the late 1890s and early 1900s, we introduce the weather kiosk.

    More >

    The high-tech way of disseminating weather information in the late 1890s and early 1900s, we introduce the weather kiosk.

    More >
  • Wet winter on the way?

    Wet winter on the way?

    Wednesday, August 1 2018 7:31 PM EDT2018-08-01 23:31:42 GMT
    (Source: 3TV/CBS 5)(Source: 3TV/CBS 5)
    (Source: 3TV/CBS 5)(Source: 3TV/CBS 5)

    It's the middle of summer and our minds are on the monsoon and this brutal Arizona heat. But if we allow ourselves to daydream about winter a little bit, there might be something to get excited about.

    More >

    It's the middle of summer and our minds are on the monsoon and this brutal Arizona heat. But if we allow ourselves to daydream about winter a little bit, there might be something to get excited about.

    More >
  • Featured VideoMore>>

  • Mesa homeowner yelling at hiker to get off his property goes viral

    Mesa homeowner yelling at hiker to get off his property goes viral

    Wednesday, August 15 2018 5:22 PM EDT2018-08-15 21:22:24 GMT
    Homeowner Bill Jaffa was recorded calling police on a woman hiking the Hawes Loop Trail last month. (Source: 3TV/CBS 5)Homeowner Bill Jaffa was recorded calling police on a woman hiking the Hawes Loop Trail last month. (Source: 3TV/CBS 5)
    Homeowner Bill Jaffa was recorded calling police on a woman hiking the Hawes Loop Trail last month. (Source: 3TV/CBS 5)Homeowner Bill Jaffa was recorded calling police on a woman hiking the Hawes Loop Trail last month. (Source: 3TV/CBS 5)

    It’s the Mesa screaming match gone viral.

    More >

    It’s the Mesa screaming match gone viral.

    More >
  • Fake contractor promises to return $3,000 cash to homeowner

    Fake contractor promises to return $3,000 cash to homeowner

    Wednesday, August 15 2018 5:21 PM EDT2018-08-15 21:21:58 GMT
    3 On Your Side caught up with Jason Segedy, a fake contractor who was hired to remodel a pool. (Source: 3TV)3 On Your Side caught up with Jason Segedy, a fake contractor who was hired to remodel a pool. (Source: 3TV)
    3 On Your Side caught up with Jason Segedy, a fake contractor who was hired to remodel a pool. (Source: 3TV)3 On Your Side caught up with Jason Segedy, a fake contractor who was hired to remodel a pool. (Source: 3TV)

    A fake contractor was hired seven months ago to remodel a swimming pool. Instead, he disappeared with the cash. That is until 3 On Your Side's Gary Harper catches up with him.

    More >

    A fake contractor was hired seven months ago to remodel a swimming pool. Instead, he disappeared with the cash. That is until 3 On Your Side's Gary Harper catches up with him.

    More >
  • DPS: Wrong-way driver arrested after crash on I-17 near New River

    DPS: Wrong-way driver arrested after crash on I-17 near New River

    Wednesday, August 15 2018 5:21 PM EDT2018-08-15 21:21:46 GMT
    A wrong-way driver was arrested after a crash on Interstate 17 north of Phoenix early Wednesday morning. (Source: 3TV/CBS 5)A wrong-way driver was arrested after a crash on Interstate 17 north of Phoenix early Wednesday morning. (Source: 3TV/CBS 5)
    A wrong-way driver was arrested after a crash on Interstate 17 north of Phoenix early Wednesday morning. (Source: 3TV/CBS 5)A wrong-way driver was arrested after a crash on Interstate 17 north of Phoenix early Wednesday morning. (Source: 3TV/CBS 5)

    The Maricopa County Sheriff's Office was able to track down the wrong-way vehicle near Pioneer Road and got it to stop.

    More >

    The Maricopa County Sheriff's Office was able to track down the wrong-way vehicle near Pioneer Road and got it to stop.

    More >