A dust devil caused property damage in Saint David.
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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.
The episode as NWS TWC wrote it up.
A dust devil caused property damage in Saint David.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before the first event at May 6, 3:29 PM MST, 1 minute earlier.
Area Forecast Discussion National Weather Service Tucson AZ 329 PM MST Sat May 6 2017 .SYNOPSIS...An unseasonably strong low pressure system will affect the area through Wednesday. Winds will begin to pick up today with temperatures well below recent days. The cooling trend and gusty winds will continue Sunday and Monday, along with increasing shower and thunderstorm chances by Tuesday. Dry conditions with much warmer temperatures will return late next week. && .DISCUSSION...The late season amplified pattern that gave us the early 104 in Tucson will now bring in gusty winds and much cooler temperatures. The strong ridge that brought the near record temperatures is east of the area with a deep trough and strong southern branch split developing behind it. An unseasonably strong low pressure system will bring gusty winds, much cooler temperatures and a solid chance of showers by Tuesday. Knock 10 degrees off the temps today, and keep it going with another 15-20 degrees Monday into Tuesday. That means We'll go from 104 Friday to about 70 Tuesday (and the 70 may be a fight as we try to climb out of the 60s). Strong winds this afternoon verifying wind and fire weather headlines. New fire start southeast of Tucson (east of Corona de Tucson) near the Empire Mountains, and dust on I-10 east of Willcox. Another round of strong winds tomorrow with a mid level moisture increase on the eastern flank of the approaching low. A few showers and thunderstorms possible, but our best chances for rain will develop as the low lifts directly through the area late Monday into Tuesday. Cool air associated with the low, with snow levels falling to around 7k feet and 1 to 4 inches of snow possible in higher mountain locations. Valley precip amounts ranging from .05 to .25 with localized higher amounts possible. We could see some decent dynamics for thunderstorms as well. The low lifts northeast of the area Wednesday with a ridge bringing a strong warming trend later in the week. && .AVIATION...Valid through 08/00Z. Expect SW surface wind 15-30 kts with gusts to near 40 kts into this evening and again late Sunday morning and afternoon. Surface wind mainly SE-S 5-15 kts with gusts to 20 kts 04Z-14Z Sunday. Otherwise, isolated -TSRA across the White Mountains NE of KSAD until around 07/01Z, then isolated -SHRA late tonight and Sunday morning west of KTUS. Isolated -TSRA east of KTUS Sunday afternoon. MVFR conditions may occur late tonight into Sunday morning due to low ceilings, especially near KTUS and KOLS. Forecast confidence is somewhat low regarding this scenario at this time. However, expect SCT-BKN clouds around 3k-6k ft AGL developing 09Z-12Z Sunday, then cloud decks mainly 8k-12k ft AGL 17Z-23Z Sunday. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...A Red Flag Warning remains in effect until 7 PM MST this evening for Fire Weather Zones 150, 151 and 152. The combination of strong and gusty southwest winds, low relative humidity and a high to very high fire danger will create critical fire weather conditions. An unseasonably strong low pressure system west of the area will maintain gusty winds again Sunday and Monday. However, critical fire weather conditions will be mitigated due to increased moisture. A few showers may occur Sunday morning west of Tucson with isolated thunderstorms Sunday afternoon mainly east of Tucson. The chance of showers and thunderstorms increases from west to east Monday, and a good chance of showers and thunderstorms exists Tuesday as the low pressure system moves into the area. A chance of showers and thunderstorms continues mainly northeast of Tucson Wednesday, then dry conditions with a strong warming trend will prevail Thursday into next Saturday. && .TWC WATCHES/WARNINGS/ADVISORIES... Blowing Dust Advisory until 7 PM MST this evening for AZZ508-509- 512. Red Flag Warning until 7 PM MST this evening for AZZ150>152. Wind Advisory until 7 PM MST this evening for AZZ501>504-507-508. && Meyer/Francis Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The national radar mosaic for the moment the first event began.
1 dust devil. Local standard time, as filed.
A dust devil damaged a storage shed on the northeast edge of Saint David. A sheet-metal roof extension was detached from the main structure and thrown about 50 yards.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2017Every state in 2017This day in weather historyWarnings in Arizona, May 2017
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 2026-09-24. Each event’s entry at NCEI: 702350.