Arizona, 2022

Debris Flow and Dust Storm in Arizona, June 26, 2022

June 26, 2022 · NWS TWC · 2 events in 2 counties and zones

Thunderstorms moved southwest across southeast Arizona. Thunderstorm winds produced a wall of dust along I-10 in Pinal County.

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.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$2,000
Crop damage
None recorded
Events
2

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 TWC wrote it up.

Thunderstorms moved southwest across southeast Arizona. Thunderstorm winds produced a wall of dust along I-10 in Pinal County. Other storms produced heavy rain and flash flooding in the Baboquivari Mountains.

What forecasters said that day

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 Jun 26, 2:00 PM MST, 0 minutes earlier.

Area forecast discussion, Jun 26, 2:00 PM MST, 0 minutes before
Area Forecast Discussion
National Weather Service Tucson AZ
200 PM MST Sun Jun 26 2022

.SYNOPSIS...Showers and thunderstorms will be present each afternoon
and evening this week across southeast Arizona with plenty of
moisture in place. High temperatures will remain near to slightly
below normal.

&&

.DISCUSSION...Temperatures are 5-9 degrees cooler than
this time yesterday thanks to this morning's cloud cover. As a
result there are currently only isolated storms mainly over the
mountains in central and western Pima County, along the
international border, and the Chiricahuas. Clouds have cleared out
of these areas allowing insolation to de-stabilize the
atmosphere. Expect this activity to continue with storm coverage
isolated to scattered. Storms in the lower desert may struggle
because of the lack of heating. Activity in Cochise County will
be helped by an approaching weak vort max from west Texas and
outflows from convection in northern Sonora. PWAT values are well
above normal for this time of year with storm motion only around 5
knots, so localized heavy rain and flooding will be a risk. Even
with the extra moisture DCAPE values are between 500-1000 J/kg,
which will lead to a threat for strong downdrafts/outflows. Hi-res
models keep showers going overnight mainly in Cochise, Graham,
and Greenlee Counties.

Monday lingering cloud cover from overnight showers could again
hinder/delay convection. Upper level flow will be out of the south
to southeast as high pressure begins to center over the Great
Basin and Four Corners. Moisture will again be in great supply
with hi-res guidance showing isolated to scattered convection. But
again this will depend on how long the cloud cover sticks around.

Southeast Arizona will remain in mostly south to easterly flow
which will keep PWAT values seasonally high. Expect daily
afternoon/evening isolated to scattered shower and thunderstorm
activity into next weekend. Forecast soundings show most of the
moisture being contained above 700 mb with an inverted V profile
below 700 mb. Strong downdrafts/downbursts will continue to be a
threat along with locally heavy rainfall. Temperatures will be
around normal for this time of year.

&&

.AVIATION...Valid through 28/00Z.
SCT -SHRA remains primarily northeast of Tucson early this afternoon
with cigs down to 7k-10k ft AGL. SCT TSRA will develop primarily
south and west of KTUS and KOLS this afternoon with better chances
at activity impacting the terminals between 00z-09z tonight. Heavier
showers and storms could drop cigs to 7k-9k ft, produce strong wind
gusts in excess of 35kts, and briefly lower visibilities. Outside of
showers and storms, winds will remain less than 12 kts with SCT-BKN
clouds at 9k-12k ft AGL. Aviation discussion not updated for TAF
amendments.

&&

.FIRE WEATHER...Monsoon moisture will remain in place over the next
several days keeping RH values above critical thresholds. Showers
and storms will be possible each afternoon across differing portions
of southeast Arizona each day, potentially lingering into the late
night hours some nights. Coverage will be isolated to scattered.
Any storms will carry the threats of lightning, strong winds
gusts, and localized flooding.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
None.

&&

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The radar

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

Open the radar archive at this moment

Event by event

1 debris flow, 1 dust storm. Local standard time, as filed.

Debris Flow, Pima

When
June 26, 2:00 PM MST to 3:00 PM MST
Where
Pima County, 3.26 mi ENE of San Juan Spg to 3.78 mi S of Pan Tak
Cause
Heavy Rain / Burn Area
Property damage
$2,000
Reported by
Department of Highways
Coordinates
31.930, -111.626

Thunderstorms produced one inch of rain in less than one hour over the Contreras burn scar causing a debris flow over State Route 386 to Kitt Peak.

Dust Storm, South Central Pinal County

When
June 26, 5:45 PM MST to 6:05 PM MST
Where
South Central Pinal County forecast zone
Reported by
Department of Highways
Coordinates
32.904, -111.345 (the zone’s center; the record gives no point)

Thunderstorm outflow winds produced a wall of dust that reduced visibilities to less than a quarter mile across I-10 near Picacho.

What these are

Debris Flow
A fast-moving slurry of mud, rock and debris, usually on a slope soaked by heavy rain or stripped by a fire.
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 2022Every state in 2022This day in weather historyWarnings in Arizona, June 2022

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 2026-09-24. Each event’s entry at NCEI: 1041280, 1041281.