Name: Hail in Arizona, August 9, 2001
Start: 2001-08-09T13:45
End: 2001-08-09T13:45
Location: 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: 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 FGZ wrote it up.

An off duty NWS employee reported 3/4 inch diameter hail in Flagstaff.

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 Aug 9, 9:00 AM MST, 4 hours 45 minutes earlier.

Area forecast discussion, Aug 9, 9:00 AM MST, 4 hours 45 minutes before

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
900 AM MST THU AUG 09 2001

.SYNOPSIS...A LOW PRESSURE SYSTEM OVER NEW MEXICO WILL CONTINUE TO
PRODUCE A MOIST NORTHEASTERLY FLOW OVER ARIZONA. THIS SYSTEM WILL BE
RESPONSIBLE FOR CLOUDY...WET AND COOL WEATHER OVER MUCH OF THE
STATE TODAY. THE LOW WILL BEGIN TO WEAKEN ON FRIDAY ALLOWING FOR A
LITTLE DRIER AND WARMER WEATHER ON FRIDAY AND SATURDAY. THERE WILL
BE ENOUGH MOISTURE INTO EARLY NEXT WEEK FOR A CHANCE OF AFTERNOON
THUNDERSTORMS.

.DISCUSSION...A MID TO UPPER TROUGH REMAINS OVER NEW MEXICO WITH AN
AN UPPER RIDGE CENTERED OVER NORTHERN BAJA CALIFORNIA. AS A
RESULT...A MOIST NORTHEAST FLOW WILL CONTINUE FOR THE NEXT 24-HOURS
WITH SHOWERS AND THUNDERSTORMS POSSIBLE ALMOST ANY HOUR OF THE DAY
(OF COURSE MOST NUMEROUS DURING THE AFTERNOON AND EVENING HOURS).
LOOKS LIKE STORMS WILL BE MOST NUMEROUS TODAY OVER THE EASTERN
MOGOLLON RIM...WHITE MOUNTAINS AND EASTERN LITTLE COLORADO RIVER
VALLEY WHERE IT IS MOSTLY SUNNY THIS MORNING AND DEEP MOISTURE IS
LOCATED. ELSEWHERE...IT REMAINS UNSTABLE ENOUGH FOR SCATTERED
SHOWERS AND THUNDERSTORMS TO DEVELOP TODAY WHERE BREAKS IN
THE MID LEVEL CLOUD DECK FORM. FOR TONIGHT...WITH SUNNY SKIES OVER
UTAH THIS MORNING...EXPECT ANOTHER ORGANIZED AREA OF THUNDERSTORMS
TO MOVE INTO NORTH CENTRAL AND NORTHWEST PORTIONS OF ARIZONA DURING
THE EVENING HOURS. ON FRIDAY...MODELS ARE INSISTING THAT THE UPPER
RIDGE WILL SHIFT NORTHWARD WITH A DRIER NORTH TO NORTHWEST FLOW
DEVELOPING. THINK THE NET RESULT WILL BE A SLIGHT DOWNTURN IN
ACTIVITY AND A MORE DIURNAL NATURE TO THUNDERSTORMS. CURRENT
FORECAST HANDLES THIS WELL.

MCCOLLUM

.FGZ...NONE.

In the hours before

Special weather statement, Aug 9, 9:30 AM MST, 4 hours 15 minutes before

AZZ004>018-037>040-091930-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
930 AM MST THU AUG 9 2001

...SCATTERED THUNDERSTORMS TODAY ACROSS NORTHERN ARIZONA WITH THE
POTENTIAL FOR HEAVY RAINFALL...

A NEARLY STATIONARY UPPER LEVEL WEATHER DISTURBANCE OVER NEW MEXICO
WILL CONTINUE TO PRODUCE A MOIST NORTHEAST FLOW ACROSS NORTHERN
ARIZONA TODAY. WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED.
THE MAIN THREAT FROM THESE STORMS WILL BE HEAVY RAIN...WITH
RAINFALL AMOUNTS OF 1 TO 3 INCHES POSSIBLE...AND THE
POTENTIAL FOR LOCALIZED FLASH FLOODING. FOR TODAY THE MOST INTENSE
STORMS ARE EXPECTED OVER THE LITTLE COLORADO RIVER VALLEY...THE
WHITE MOUNTAINS AND THE MOGOLLON RIM. FOR LATE THIS AFTERNOON AND
EVENING STRONGER STORMS SHOULD MOVE INTO THE AREA OF THE KAIBAB
PLATEAU...PAGE...THE GRAND CANYON AND THE COCONINO PLATEAU.

The radar

The Flagstaff radar (KFSX), 81 km away, was scanning. The volume nearest the first event began at 20:42 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Coconino

When: August 9, 1:45 PM MST
Where: Coconino County, Flagstaff
Measured: 0.75 in hail
Reported by: NWS EMPLOYEE(OFF DUTY)
Coordinates: 35.200, -111.650

What these are

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 2001 Every state in 2001 This day in weather history Warnings in Arizona, August 2001

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: 5266888.