Arizona, 2024

Flash Flood and Hail in Arizona, July 27 to 28, 2024

July 27 to 28, 2024 · NWS FGZ · 2 events in 2 counties and zones

Deep monsoon moisture triggered strong to severe thunderstorms with hail and heavy rain over parts of northern Arizona.

Where it happened

Every event with a place to put it. 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
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 FGZ wrote it up.

Deep monsoon moisture triggered strong to severe thunderstorms with hail and heavy rain over parts of northern Arizona.

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 Flagstaff, AZ wrote its last area forecast discussion before the first event at Jul 27, 12:15 PM MST, 45 minutes earlier.

Area forecast discussion, Jul 27, 12:15 PM MST, 45 minutes before
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In the hours before

Special weather statement, Jul 27, 12:40 PM MST, 20 minutes before
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The radar

The Flagstaff radar (KFSX), 103 km away, was scanning. The volume nearest the first event began at 19:59 UTC.

Open the radar archive at this moment

Event by event

1 hail, 1 flash flood. Local standard time, as filed.

Hail, Navajo

When
July 27, 1:00 PM MST
Where
Navajo County, 1.38 mi N of Snowflake
Measured
1 in hail
Reported by
Public
Coordinates
34.520, -110.080

One inch diameter hail fell in Snowflake at around 100 PM.

Flash Flood, Apache

When
July 27, 5:30 PM MST to July 28, 8:30 AM MST
Where
Apache County, 3.12 mi ENE of Lyman Lake to 5.52 mi W of Hunt
Cause
Heavy Rain
Reported by
Other Federal Agency
Coordinates
34.383, -109.328

A USGS stream gage along the Little Colorado River near St. Johns (LCSA3) reported a 3.8 foot rise between 530 PM and 830 PM. The flow returned to near normal around 800 AM on the 28th. St. Johns police reported that multiple homes being flooded along Commercial Street and along 7th Street South near the Little Colorado River. Street flooding was also occurring in St Johns.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.

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, July 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 2026-10-01. Each event’s entry at NCEI: 1206417, 1206419.