Hail in Arizona, August 14, 2001

Name: Hail in Arizona, August 14, 2001
Start: 2001-08-14T13:30
End: 2001-08-14T13:30
Location: Arizona

August 14, 2001 · NWS FGZ · 1 event in 1 county or zone

Three-quarter inch hail was reported at the Slide Rock State Park at 130 PM.

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

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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.

Three-quarter inch hail was reported at the Slide Rock State Park at 130 PM.

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 14, 10:25 AM MST, 3 hours 5 minutes earlier.

Area forecast discussion, Aug 14, 10:25 AM MST, 3 hours 5 minutes before

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1025 AM MST TUE AUG 14 2001

.SYNOPSIS...ENOUGH MOISTURE WILL REMAIN TODAY FOR SOME THUNDERSTORMS
BY THIS AFTERNOON...HOWEVER NOT AS WIDE SPREAD AS THE PAST SEVERAL
DAYS. DUE TO THE SLIGHTLY DRIER AIR ALOFT AND THE SUNNY SKIES THIS
MORNING...SOME OF THE STORMS THAT DEVELOP BY THIS AFTERNOON HAVE THE
POTENTIAL OF BECOMING STRONG. THE THREAT FOR LOCALLY HEAVY RAIN HAS
DIMINISHED...AND WILL NOT BE AS WIDESPREAD TODAY...BUT THERE IS THE
POTENTIAL FOR ISOLATED HEAVY RAINFALL FROM SOME OF THE STRONGER
THUNDERSTORMS.

A DRYING TREND WILL CONTINUE INTO THE WORK WEEK. EXPECT TEMPERATURES
TO WARM...WITH A SLIGHT DECREASE IN SHOWER AND THUNDERSTORM ACTIVITY
EACH DAY THROUGH FRIDAY.

.DISCUSSION...A MID-LEVEL ANTICYCLONE JUST OFF THE SOUTHERN
CALIFORNIA COAST WILL RESULT IN A GENERAL NORTH TO NORTHWEST FLOW
ACROSS NORTHERN ARIZONA THE NEXT TWO DAYS. 500 MB WINDS WILL PUSH
COOLER TEMPERATURES OVER THE TOP OF THE RIDGE INTO NORTHERN ARIZONA
THIS AFTERNOON. CLEAR SKIES THIS MORNING AND COOLING IN THE UPPER
LEVEL WILL AID IN STEEPENING LAPSE RATES. SO STORMS THAT DO DEVELOP
TODAY HAVE THE POTENTIAL OF BEING STRONGER...ESPECIALLY OVER NORTH
CENTRAL AND NORTHEAST ARIZONA. THE MODEL SOUNDINGS AND FGZ SOUNDING
SHOWING A WIND PROFILE THAT STEER THE ANVIL TO THE NORTH NORTHEAST
WHILE THE LOW-LEVELS WILL PUSH THE CONVECTION SLOWLY TO THE
SOUTHEAST...WHICH WILL ALLOW THE STORMS TO BE ORGANIZED SOME WHAT.
OVERALL FORECAST IS GOOD. WILL NOT UPDATE...THIS MORNING.

CLEMMONS

.FGZ...NONE.

In the hours before

Special weather statement, Aug 14, 9:30 AM MST, 4 hours before

AZZ004>018-037>040-141930-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
930 AM MST TUE AUG 14 2001

...FEWER YET STRONGER THUNDERSTORMS TODAY ACROSS NORTHERN ARIZONA...

DRIER AIR WILL BEGIN MOVING ACROSS NORTHERN ARIZONA TODAY BUT ENOUGH
MOISTURE WILL REMAIN FOR THE DEVELOPMENT OF SCATTERED THUNDERSTORMS.
STORMS WILL BE NOT AS WIDE SPREAD AS THE PAST FEW DAY...HOWEVER THE
ATMOSPHERE IS MORE UNSTABLE SO THERE WILL BE THE POTENTIAL FOR
STRONGER STORMS. LOCAL RAINFALL ACCUMULATIONS OF AROUND 1 INCH WILL BE
COMMON WITH THE STRONGER STORMS. THERE WILL BE MORE MOISTURE AVAILABLE
ALONG AND SOUTHWEST OF THE MOGOLLON RIM INTO SOUTHERN YAVAPAI COUNTY.
A FEW STORMS THAT DEVELOP IN THIS AREA HAVE THE POTENTIAL TO PRODUCE
LOCAL RAINFALL ACCUMULATIONS OF 1 TO 3 INCHES. IN ADDITION TO
LOCALLY HEAVY RAIN THERE WILL BE A LOW THREAT FOR HAIL. THE AIR MASS
IS UNSTABLE ENOUGH FOR A FEW STORMS TO BECOME SEVERE WITH HAIL SIZE
UP TO ONE INCH. THE STRONGEST STORMS WILL BE LOCATED OVER THE
MOGOLLON RIM...NORTHERN GILA COUNTY AND YAVAPAI COUNTY LATE THIS
MORNING AND AFTERNOON.

SPOTTER ACTIVATION IS REQUESTED FOR SEVERE WEATHER AND LOCALLY
HEAVY RAIN FALL TODAY.

Local storm report, Aug 14, 9:57 AM MST, 3 hours 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF ARIZONA
0957 AM MST TUE AUG 14 2001

TIME (MST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0200 AM    SUPAI                     AZ   FLASH FLOOD
08/11/01   COCONINO                       *** 3 DEAD ***
                                          FLASH FLOOD IN REMOTE SIDE CANYON
                                          ON HAVASUPAI INDIAN RESERVATION.
                                          REPORTED BY SUPAI POLICE.

The radar

The Flagstaff radar (KFSX), 145 km away, was scanning. The volume nearest the first event began at 20:32 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Coconino

When: August 14, 1:30 PM MST
Where: Coconino County, Oak Creek Canyon
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 35.717, -111.967

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

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: 5266896.