1,237 first-hand accounts of flood events in Arizona, ranked by impact. Each is a NOAA-written narrative of the moment.
Abundant moisture (PWATs 1.7-2.0) and instability (MUCAPE 2,000 J/kg) provided a favorable environment for strong to severe thunderstorms across south-central Arizona on the 14th.
Read the full account →What was Major Hurricane Rosa crossed the northern Baja peninsula as a tropical depression October 1st. The remnant circulation entered southwest Arizona on October 2nd. Moisture ahead of these remnants fueled thunderstorms in southeast Arizona on September 30th.
Read the full account →Copious amounts of tropical moisture spread north into the south-central deserts during the morning hours on October 2nd. The moisture was associated with the remnants of former hurricane Rosa.
Read the full account →Multiple rounds of thunderstorms developed and moved across southeast Arizona from mid morning of August 16 through the early evening of August 17.
Read the full account →Showers and embedded thunderstorms developed across south central Arizona during the early morning hours on September 8th, and as the morning progressed the showers intensified and became more and more widespread.
Read the full account →Scattered thunderstorms moved slowly northwest across southeast Arizona. Heavy rain caused flash flooding in Pima and Pinal Counties and especially in Marana where up to three inches of rain caused widespread flash flooding and considerable damage including a train derailment…
Read the full account →A slow moving low pressure system brought several rounds of showers and thunderstorms across portions of south-central and southwestern Arizona throughout the day on the 15th.
Read the full account →Daytime heating combined with divergence aloft associated with an easterly wave near the Arizona/New Mexico border promoted thunderstorm initiation across southeast Arizona during the afternoon of the 30th.
Read the full account →The remnant mid-level circulation of what was Tropical Cyclone Kay was located over southern California. This led to southerly flow across Arizona, which helped increased moisture and instability with moisture values peaking at around 1.5 and MLCAPE values peaking at around 1000…
Read the full account →A surge of subtropical moisture moved into the region during the 3rd as a result of southwest flow that developed from an upper-level low located along the west coast and an upper-level high pressure along the Gulf coast states.
Read the full account →Strong to severe thunderstorms developed in an unstable atmosphere in the afternoon of the 22nd. Storms initially developed over the high terrain of northern and eastern Arizona as well as near the Table Top mesa area south of Phoenix.
Read the full account →The monsoon high broke down over Arizona late in August with a trough setting up over the southwest U.S. leading to southwest flow over the state. Tropical moisture was able to push up the Gulf of California into Arizona under this setup.
Read the full account →A breach in a berm along Rucker Creek near the northeast edge of Elfrida caused flash flooding in part of town on August 23. Additional rainfall in town and upstream of the breach exacerbated the flooding later that day.
Read the full account →Isolated to scattered thunderstorms developed and moved southeast across parts of southeast Arizona during the late afternoon and evening hours of September 8th. The strongest storms produced heavy rain and gusty winds across far eastern Pima and western Cochise counties.
Read the full account →A slow moving upper level weather system produced periods of heavy rain across southeast Arizona July 24 and 25, especially in Pinal and Pima counties.
Read the full account →Multiple rounds of thunderstorms developed and moved across southeast Arizona from mid morning of August 16 through the early evening of August 17.
Read the full account →Strong to severe thunderstorms developed in an unstable atmosphere in the afternoon of the 22nd. Storms initially developed over the high terrain of northern and eastern Arizona as well as near the Table Top mesa area south of Phoenix.
Read the full account →A retrograding upper level low combined with anomalously high moisture levels led to showers and isolated thunderstorms producing heavy rainfall and numerous instances of considerable flash flooding across south-central Arizona on the 25th.
Read the full account →A classic bow echo developed along the Mogollon Rim in central Arizona around 1900MST on the 13th and merged with thunderstorm clusters that developed in south-central Arizona around 2030MST to form one southwestward-moving MCS that progressed all the way to the town of Yuma in…
Read the full account →An upper level trough and lead-on shortwave trough moved through Arizona during the day on the 18th. Moderate to high instability and high moisture content supported scattered strong thunderstorms.
Read the full account →A weakening but still potent upper level low pressure system continued to push east across Arizona during the day on March 13th, and the atmosphere across the central deserts was still very humid and a bit unstable.
Read the full account →The monsoon high broke down over Arizona late in August with a trough setting up over the southwest U.S. leading to southwest flow over the state. Tropical moisture was able to push up the Gulf of California into Arizona under this setup.
Read the full account →Above normal precipitable water values, high surface dewpoints, and light southerly or southeasterly steering flow will continued across northern Arizona. The morning sounding showed moderate instability, with potential for back-building and/or training.
Read the full account →A strong, wet Pacific upper level low pressure system spread copious amounts of moisture into south central Arizona on Saturday February 22nd; as a result widespread rain developed early in the morning and the moderate to heavy rain persisted for much of the day.
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