Strong thunderstorms developed across southern Pinal county during the afternoon hours on July 3rd, and they generated strong gusty outflow winds in excess of 50 mph. The winds spread to the northwest and picked up massive amounts of dust, leading a major dust storm across the central deserts, including the greater Phoenix metropolitan area. Visibilities dropped to near zero miles at times, and given the late afternoon and early evening time frame, severely disrupted the evening rush hour. Initially, Blowing Dust Advisories were issued, but were later upgraded to Dust Storm Warnings. No significant accidents or injuries were reported due to the dense blowing dust.

Dust Storm in GREATER PHOENIX AREA, ARIZONA
From 03-JUL-14 19:00:00 to 03-JUL-14 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed across southern Pinal county during the afternoon hours on July 3rd, and due to favorable atmospheric conditions, they were able to generate strong gusty outflow winds in excess of 50 mph. These gusty winds spread to the northwest, picking up massive amounts of dust and dirt and generating dust storm conditions which spread into the southeast portions of the greater Phoenix area by early evening. Numerous trained weather spotters across the greater Phoenix area reported dust storm conditions, and a Dust Storm Warning was issued, running from 1900MST to 2100MST. At  1952MST, a trained spotter in Tempe reported a dust storm with visibility down to one tenth of a mile at the intersection of Mill and Southern. Another trained spotter 3 miles northwest of the Arizona State Fairgrounds reported a dust storm with one quarter mile visibility, accompanied by wind gusts estimated to be nearly 50 mph.

Dust Storm in CENTRAL DESERTS, ARIZONA
From 03-JUL-14 18:20:00 to 03-JUL-14 20:26:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed during the afternoon hours across southern Pinal county, and due to favorable environmental conditions, they generated strong outflow winds to around 50 mph. The outflow winds spread to the northwest and picked up massive amounts of dust, creating dust storm conditions. The dust storm moved into the central deserts during the late afternoon hours, and initially led to the issuance of a Blowing Dust Advisory. At 1820MST, the advisory was upgraded to a Dust Storm Warning, which remained in effect through 2026MST. Several trained weather spotters in favored dust prone areas such as Coolidge and Casa Grande reported dust storm conditions with visibilities dropping at or below one quarter of a mile.

Dust Storm in WEST CENTRAL DESERTS, ARIZONA
From 03-JUL-14 19:08:00 to 03-JUL-14 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed during the afternoon hours across southern Pinal county, and due to favorable environmental conditions, they were able to generate strong gusty outflow winds in excess of 50 mph. The winds spread to the west, and in the process they picked up significant amounts of dust and dirt which led to dust storm conditions. The dust storm then spread across the west central deserts during the evening hours; a Dust Storm Warning was issued for the area from 1908MST until 2300MT. Despite a lack of trained spotter reports from the sparsely populated west central deserts, numerous spotters across the south central deserts, including the greater Phoenix area, reported dust storm conditions with this event.

Dust Storm in SOUTHWEST MARICOPA COUNTY, ARIZONA
From 03-JUL-14 18:20:00 to 03-JUL-14 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed across southern Pinal county during the afternoon hours on July 3rd, and due to favorable atmospheric conditions, they were able to generate strong gusty outflow winds in excess of 50 mph. These gusty winds spread to the west and northwest and moved into southwest Maricopa county, generating dust storm conditions as they moved across the desert. Initially, a Blowing Dust Advisory was issued for southwest Maricopa county, however at 1820MST it was upgraded to a Dust Storm Warning. The warning ran was in effect through 2100MST. At  1841MST, a trained weather spotter located 2 miles southwest of Gila Bend reported a dust storm with visibilities dropping below one quarter of a mile. No accidents or injuries were reported in Gila Bend due to the dust storm.

Dust Storm in SOUTHWEST DESERTS, ARIZONA
From 03-JUL-14 19:08:00 to 03-JUL-14 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed during the afternoon hours across southern Pinal county, and due to favorable environmental conditions, they were able to generate strong gusty outflow winds in excess of 50 mph. The winds spread to the west, and in the process they picked up significant amounts of dust and dirt which led to dust storm conditions. The dust storm then spread across the southwest deserts during the evening hours; a Dust Storm Warning was issued for the area from 1908MST until 2300MT. Despite a lack of trained spotter reports from the sparsely populated southwest deserts, numerous spotters across the south central deserts, including the greater Phoenix area, reported dust storm conditions with this event.

Dust Storm in NORTHWEST MARICOPA COUNTY, ARIZONA
From 03-JUL-14 19:00:00 to 03-JUL-14 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms developed across southern Pinal county during the afternoon hours on July 3rd, and due to favorable atmospheric conditions, they generated strong gusty outflow winds in excess of 50 mph. These winds spread to the northwest, picking up massive amounts of dirt and dust and creating dust storm conditions. The dust storm spread across the greater Phoenix area during the evening hours, eventually moving through northwest portions of Maricopa county. A Dust Storm Warning was issued  at 1900MST and it continued through 2300MST. Numerous trained spotters in the greater Phoenix area reported dust storm conditions with this event, with visibilities dropping at or below one quarter of a mile.