Arizona, 2016

Hail in Arizona, July 24, 2016

July 24, 2016 · NWS FGZ · 1 event in 1 county or zone

A thunderstorm produced severe hail in White River.

Where it happened

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  • Winter weather
  • Heat and drought
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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.

A thunderstorm produced severe hail in White River.

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 24, 2:50 PM MST, 55 minutes earlier.

Area forecast discussion, Jul 24, 2:50 PM MST, 55 minutes before
Area Forecast Discussion
National Weather Service Flagstaff AZ
250 pM MST SUN JUL 24 2016

.SYNOPSIS...Monsoon moisture will increase across northern Arizona
from south to north through Tuesday. Expect scattered showers and
thunderstorms, especially over the mountains. On Wednesday drier
air should move areas north of Interstate 40 leading to only
isolated storm chances there. Elsewhere, expected scattered
convective activity to continue.

&&

.DISCUSSION....We have seen several strong storms this
afternoon along and east of the Mogollon rim and Kaibab Plateau.
Upper level winds are pushing storm anvils to the northeast while
outflow winds are converging with sw flow below H7 this afternoon.
We are feeling good that scattered storm coverage to further develop
across the rest the Mogollon rim this afternoon. Mesoanalysis shows
convective inhibition to continue over much of Yavapai and nrn Gila
counties into this evening and not sure how far storms will develop
away from the rim.

The excessive heat warning for the Grand Canyon Below 4000 feet will
expire at 8 pm this evening.

Monday and Tuesday - Subtropical moisture to move northward
through Tuesday due to light easterly then southerly mid level
wind trajectories. Moderate to high grade monsoon activity is
expected across northern Arizona both days with greatest coverage
during the afternoon and evening.

Wednesday - Thursday -The mid level high pressure cell to become
centered over SW Utah. A drier northerly flow is forecast to develop
and kill thunderstorm chances for areas north of I-40. Elsewhere the
typical monsoon pattern of scattered daytime and isolated overnight
convective activity to continue.

Friday - Sunday - Operational model spread develops on Friday as the
ECMWF continues to show the high center over sw utah with the dry
flow into nrn AZ. The GFS develops moist easterly flow over all of
nrn az. We will go with climo storm chances for now.

&&

.AVIATION....For the 00Z package...Scattered SHRA/TSRA will
continue to develop and move across northern AZ this afternoon and
evening. Conditions to remain mostly VFR with local MVFR/IFR in +RA
possible. Gusty winds up to 35 kts also possible near any storms.
Aviation discussion not updated for TAF amendments.

&&

.FGZ WATCHES/WARNINGS/ADVISORIES...Excessive Heat Warning until 8 PM
MST this evening FOR AZZ006.

&&

PUBLIC...DL
AVIATION...SUK

For Northern Arizona weather information visit
weather.gov/flagstaff
Hazardous weather outlook, Jul 24, 7:14 AM MST, 8 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
714 AM MST SUN JUL 24 2016

AZZ004>018-037>040-250300-
KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY-
COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS-
NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY-
CHUSKA MOUNTAINS AND DEFIANCE PLATEAU-
LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-WHITE MOUNTAINS-
NORTHERN GILA COUNTY-YAVAPAI COUNTY VALLEYS AND BASINS-
OAK CREEK AND SYCAMORE CANYONS-BLACK MESA AREA-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
714 AM MST SUN JUL 24 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...
NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN
ARIZONA.

.DAY ONE...TODAY AND TONIGHT

AN EXCESSIVE HEAT WARNING IS IN EFFECT TODAY FOR AREAS BELOW 4000
FEET IN THE GRAND CANYON.

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
DEVELOP TODAY...WITH MOST ACTIVITY THIS AFTERNOON AND EVENING. THE
MAIN THREATS ARE LIGHTNING AND LOCALIZED HEAVY RAINFALL. SMALL
HAIL AND GUSTY WINDS ARE ALSO POSSIBLE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

DAILY THUNDERSTORM CHANCES WILL CONTINUE. AREAS NORTH OF THE
MOGOLLON RIM WILL EXPERIENCE DRIER AND HOTTER CONDITIONS WITH ONLY
A SLIGHT CHANCE OF STORMS FROM WEDNESDAY ONWARD AS DRIER AIR
FILTERS INTO FAR NORTHER ARIZONA.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Jul 24, 1:12 PM MST, 2 hours 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
112 PM MST SUN JUL 24 2016

AZZ015-242100-
WESTERN MOGOLLON RIM AZ-
112 PM MST SUN JUL 24 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL COCONINO COUNTY UNTIL 200
PM MST...

AT 110 PM MST...TRAINED WEATHER SPOTTERS REPORTED A STRONG
THUNDERSTORM OVER DONEY PARK...OR 7 MILES NORTHEAST OF FLAGSTAFF...
MOVING SOUTHWEST AT 5 MPH.

NICKEL SIZE HAIL WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FLAGSTAFF...COSNINO...FERNWOOD...WINONA...DONEY PARK...TIMBERLINE...
DOWNTOWN FLAGSTAFF...FLAGSTAFF MALL...HUTCHISON ACRES...
WALNUT CANYON NATIONAL MONUMENT...FORT VALLEY...
LITTLE ELDEN SPRING HORSE CAMP...LOWER LAKE MARY...
WALNUT CANYON VISITORS CENTER AND CANYON VISTA CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3536 11148 3521 11139 3506 11164 3530 11178
TIME...MOT...LOC 2010Z 063DEG 7KT 3526 11152
Special weather statement, Jul 24, 1:32 PM MST, 2 hours 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
132 PM MST SUN JUL 24 2016

AZZ016-018-242115-
EASTERN MOGOLLON RIM AZ-NORTHERN GILA COUNTY AZ-
132 PM MST SUN JUL 24 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN GILA...SOUTHEASTERN
COCONINO AND WESTERN NAVAJO COUNTIES UNTIL 215 PM MST...

AT 132 PM MST...A STRONG THUNDERSTORM WAS REPORTED NEAR FOREST LAKES.
THIS STORM WAS NEARLY STATIONARY.

NICKEL SIZE HAIL WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FOREST LAKES...CANYON CREEK FISH HATCHERY...
BLACK CANYON RIM CAMPGROUND AND CANYON POINT CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3426 11074 3430 11084 3440 11080 3437 11074
TIME...MOT...LOC 2032Z 009DEG 1KT 3439 11078

41

The radar

The Flagstaff radar (KFSX), 140 km away, was scanning. The volume nearest the first event began at 22:46 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Navajo

When
July 24, 3:45 PM MST
Where
Navajo County, 0.9 mi NE of Whiteriver
Measured
1 in hail
Reported by
Fire Department/Rescue
Coordinates
33.840, -109.960

A thunderstorm produced severe hail in White River.

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 2016Every state in 2016This day in weather historyWarnings in Arizona, July 2016

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: 654657.