Arizona, 1997

Flash Flood and Hail in Arizona, September 11, 1997

September 11, 1997 · NWS PSR · 7 events in 2 counties and zones

5 thunderstorm wind, 1 flash flood, 1 hail, as filed by the National Weather Service.

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
None recorded
Crop damage
None recorded
Events
7

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 radar

The Phoenix radar (KIWA), 68 km away, was scanning. The volume nearest the first event began at 17:24 UTC.

Open the radar archive at this moment

Event by event

5 thunderstorm wind, 1 flash flood, 1 hail. Local standard time, as filed.

Thunderstorm Wind, Maricopa

When
September 11, 10:24 AM MST to 11:44 AM MST
Where
Maricopa County, 17 mi W of Phoenix
Measured
50 kt (58 mph)
Coordinates
33.480, -112.370

Numerous power outages.

Thunderstorm Wind, Maricopa

When
September 11, 10:47 AM MST
Where
Maricopa County, 15 mi N of Phoenix
Measured
50 kt (58 mph)
Coordinates
33.700, -112.070

Spotters reported trellises and shingles damaged in North Phoenix.

Thunderstorm Wind, Maricopa

When
September 11, 11:00 AM MST to 11:24 AM MST
Where
Maricopa County, 15 mi NW of Phoenix
Measured
52 kt (60 mph)
Coordinates
33.630, -112.250

NWS employee estimated wind gusts to 60 mph.

Flash Flood, Maricopa

When
September 11, 11:00 AM MST to 2:40 PM MST
Where
Maricopa County, 10 mi NW of Phoenix
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Widespread street and low land flooding.

Thunderstorm Wind, Maricopa

When
September 11, 11:02 AM MST
Where
Maricopa County, 18 mi N of Phoenix
Measured
80 kt (92 mph)
Coordinates
33.750, -112.070

Deer Valley airport reported a peak gust of 92mph.

Hail, Pinal

When
September 11, 12:45 PM MST
Where
Pinal County, 10 mi W of Stanfield
Measured
0.75 in hail
Coordinates
32.870, -112.130

Spotter reported dime size hail.

Thunderstorm Wind, Maricopa

When
September 11, 1:15 PM MST to 1:40 PM MST
Where
Maricopa County, 12 mi S of Buckeye
Measured
60 kt (69 mph)
Coordinates
33.200, -112.580

About 30 power poles downed near Patterson Road.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

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

The same day elsewhere

More

Every storm in Arizona in 1997Every state in 1997This day in weather historyWarnings in Arizona, September 1997

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: 5623759, 5623667, 5623760, 5623763, 5623764, 5623761, 5623762.