Thunderstorms developed across portions of far southwest Arizona during the afternoon hours on August 22nd, and they affected the community of Yuma, as well as surrounding communities such as Fortuna Foothills and Somerton. The thunderstorms were quite intense and produced a wide variety of weather, including strong damaging winds in excess of 50 mph, locally dense blowing dust, moderate hail and locally heavy rain. Winds were sufficient to blow down power lines and blow over trailer trucks. Hail nearly one inch in diameter fell in Yuma, and rainfall in the Fortuna Foothills approached 2 inches, leading to localized flooding. A wide variety of products were issued including Severe Thunderstorm Warnings and Urban and Small Stream Flood Advisories.

Heavy Rain in YUMA, ARIZONA
From 22-AUG-13 17:00:00 to 22-AUG-13 19:00:00 (MST-7)
Location: LIGURTA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed across portions of far southwest Arizona during the afternoon hours on August 22nd and they affected the communities of Yuma and the Fortuna Foothills. In addition to producing gusty and damaging winds, they also produced locally heavy rainfall with rain rates well in excess of one inch per hour. A trained weather spotter 2 miles southeast of the Fortuna Foothills measured rainfall at a rate of 1.89 inches per hour. The heavy rain caused localized flooding in the area around the Fortuna Foothills and Yuma, and led to the issuance of an Urban and Small Stream Flood Advisory starting at 1720MST and continuing past 1915MST. In addition to the spotter report, radar indicated that up to 2 inches of rain fell from 1700MST through 1900MST in the Yuma area.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-13 17:02:00 to 22-AUG-13 17:30:00 (MST-7)
Location: EL PUEBLECITO
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed across far southwest Arizona during the afternoon hours on August 22nd and they affected the community of Yuma. The storms produced strong, gusty and damaging winds estimated to be in excess of 60 mph. A trained weather spotter 2 miles northwest of Yuma reported that power lines were blown down near Interstate 8, approximately at the intersection of Araby Street. In addition, a trailer truck was blown over at Araby Street and East 24th Street. Although a Severe Thunderstorm Warning was not in effect, there was a Significant Weather Advisory issued at 1700MST for Yuma which ran until 1800MST.

Thunderstorm Wind in YUMA, ARIZONA
From 22-AUG-13 18:30:00 to 22-AUG-13 18:35:00 (MST-7)
Location: SOMERTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed during the afternoon hours across portions of far southwestern Arizona on August 22nd, and they affected the communities of Yuma and Somerton. The storms produced a wide variety of weather, including gusty and damaging winds estimated to be in excess of 50 mph. A trained weather spotter 4 miles southeast of Somerton reported that gusty outflow winds caused a number of branches to be blown off of trees. The branches were at least 3 inches in diameter. A Severe Thunderstorm Warning had been issued for the area around Somerton, beginning at 1802MST and continuing until 1900MST.

Dust Storm in YUMA/MARTINEZ LAKE AND VICINITY, ARIZONA
From 22-AUG-13 17:00:00 to 22-AUG-13 18:35:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorms developed across far southwest Arizona during the afternoon hours on August 22nd and they affected the community of Yuma. The storms generated strong and gusty outflow winds in excess of 40 mph which were sufficient to produce dust storm conditions with visibilities at or below one quarter of a mile in dense blowing dust. At 1652MST, a report was received via amateur radio, indicating a dust storm in Yuma with visibility down to around one quarter of a mile. A Dust Storm Warning was then issued at 1700MST for the Yuma area; it was in effect until 1835MST. The dust storm and associated low visibilities were a significant disruption to rush hour traffic in Yuma and impacted motorists on area roads and highways such as Interstate 8. Fortunately there were no reports of injuries or significant accidents due to the dust storm.

Hail in YUMA, ARIZONA
From 22-AUG-13 16:52:00 to 22-AUG-13 16:55:00 (MST-7)
Location: EL PUEBLECITO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorms developed in the Yuma area during the afternoon hours on August 22nd, and they produced a variety of weather elements including moderate hail. Hail measured at 0.88 inches in diameter was reported in Yuma. The report was received via amateur radio. The report also indicated that visibility was less than one quarter of a mile in blowing dust. The storms led to the issuance of a Significant Weather Advisory for Yuma beginning at 1700MST and continuing until 1800MST.