Arizona, 2024

Dust Storm in Arizona, May 20, 2024

May 20, 2024 · NWS PSR · 1 event in 1 county or zone

An upper-level trough pulling anomalously high moisture content into the region resulted a line of high based shower activity across south-central AZ. Strong evaporational cooling from these showers resulted in strong winds and consequently blowing dust issues, with the most significant issue near Casa Grande, AZ where visibilities near zero were observed along I-10.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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The toll

Deaths
0
Injuries
1
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PSR wrote it up.

An upper-level trough pulling anomalously high moisture content into the region resulted a line of high based shower activity across south-central AZ. Strong evaporational cooling from these showers resulted in strong winds and consequently blowing dust issues, with the most significant issue near Casa Grande, AZ where visibilities near zero were observed along I-10. A vehicular crash from the dust storm was observed along the interstate, resulting in an injury.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 dust storm. Local standard time, as filed.

Dust Storm, Northwest Pinal County

When
May 20, 1:40 PM MST to 1:50 PM MST
Where
Northwest Pinal County forecast zone
Injuries
1 direct, 0 indirect
Reported by
Broadcast Media
Coordinates
32.904, -111.345 (the zone’s center; the record gives no point)

Near zero visibility in blowing dust on I-10 in Casa Grande. There was also a traffic accident during the dust storm with one person transported to the hospital.

What these are

Dust Storm
Blowing dust that reduced visibility to a quarter mile or less.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Arizona in 2024Every state in 2024This day in weather historyWarnings in Arizona, May 2024

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1176306.