Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 40, NWS Flagstaff, AZ

July 17, 2022Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 17, 2022, 4:38 PM MST for Yavapai County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 17, 2022, 4:38 PM MST (23:38 UTC)
Expired: Jul 17, 2022, 7:45 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 23:41 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Phoenix, AZ (KPSR), launched 12:00Z, 11.6 hours before the alert went out and 141 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 124 J/kg
Mixed-layer CIN: -614 J/kg
Mixed-layer LCL: 2663 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Jul 17, 3:15 PM MST, 1 hour 23 minutes earlier.

Area forecast discussion, Jul 17, 3:15 PM MST, 1 hour 23 minutes before

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In the hours before

Local storm report, Jul 17, 12:56 PM MST, 3 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1256 PM MST SUN JUL 17 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1255 PM     HAIL             4 NW PINETOP-LAKESIDE   34.19N 110.00W
07/17/2022  M1.00 INCH       NAVAJO             AZ   PUBLIC

            MIX OF DIME TO QUARTER SIZE HAIL.

&&

HUMPHREYS

Special weather statement, Jul 17, 1:58 PM MST, 2 hours 40 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
158 PM MST Sun Jul 17 2022

AZZ016-018-172130-
Northern Gila County-Eastern Mogollon Rim-
158 PM MST Sun Jul 17 2022

...A strong thunderstorm will impact portions of Gila and Coconino
Counties  near Kohls Ranch through 230 PM MST...

At 157 PM MST, Doppler radar was tracking a strong thunderstorm over
Hunter Creek, or 11 miles west of Forest Lakes, moving northwest at
10 mph.

HAZARD...Wind gusts up to 50 mph, up to nickel size hail, and heavy
         rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Christopher Creek, Tonto Village, Kohls Ranch, Hunter Creek, Mead
Ranch, Forest Road 169 Campground, Bear Flat, Upper Tonto Creek
Campground, Spillway Campground, Ponderosa Campground, Sharp Creek
Campground, Forest Road 195 Campground, Mogollon Campground, Forest
Road 9350 Campground, Rim Campground, Promontory Pit Road Campground,
Christopher Creek Campground, Woods Canyon Lake Campground and Crook
Campground.

This includes State Route 260 between mile markers 264 and 281.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3424 11091 3421 11101 3433 11122 3443 11088
TIME...MOT...LOC 2057Z 152DEG 7KT 3427 11100

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

JM

Local storm report, Jul 17, 2:02 PM MST, 2 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
202 PM MST SUN JUL 17 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0136 PM     HAIL             SHOW LOW                34.24N 110.04W
07/17/2022  E0.88 INCH       NAVAJO             AZ   PUBLIC

&&

HUMPHREYS

Special weather statement, Jul 17, 2:27 PM MST, 2 hours 11 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
227 PM MST Sun Jul 17 2022

AZZ004-006-007-172200-
Kaibab Plateau-Coconino Plateau-Grand Canyon Country-
227 PM MST Sun Jul 17 2022

...A strong thunderstorm will impact portions of Coconino County
through 300 PM MST...

At 226 PM MST, Doppler radar was tracking a strong thunderstorm over
Tusayan, or 17 miles west of Desert View at Grand Canyon, moving
north at 10 mph towards the south Rim.

HAZARD...Wind gusts up to 50 mph, up to nickel size hail, and
         frequent lightning.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Maricopa Point At Grand Canyon, Yaqui Point At Grand Canyon, Hermit's
Rest At Grand Canyon, Tusayan, Shoshone Point At Grand Canyon,
Grandview Point At Grand Canyon, Pima Point At Grand Canyon, South
Rim Visitors Center, Cape Royal At Grand Canyon, Hopi Point At Grand
Canyon, Grand Canyon Village and Ten-x Campground.

This includes State Route 64 between mile markers 233 and 237.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3595 11197 3592 11219 3614 11242 3620 11192
TIME...MOT...LOC 2126Z 169DEG 9KT 3601 11213

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

JM

Local storm report, Jul 17, 2:37 PM MST, 2 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
237 PM MST SUN JUL 17 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0234 PM     HAIL             8 SW FOREST LAKES       34.26N 110.90W
07/17/2022  E0.50 INCH       GILA               AZ   PUBLIC

&&

HUMPHREYS

Special weather statement, Jul 17, 3:39 PM MST, 59 minutes before

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The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 5:57 PM MST	Special Weather Statement	FGZ	Yavapai	48 min
Jul 16, 7:19 PM MST	Special Weather Statement	FGZ		26 min
Jul 16, 8:00 PM MST	Areal Flood Advisory	FGZ	Apache, Navajo	3 hr
Jul 16, 8:59 PM MST	Areal Flood Advisory	FGZ	Yavapai	2 hr
Jul 17, 12:19 AM MST	Special Weather Statement	FGZ		41 min
Jul 17, 12:38 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	37 min
Jul 17, 1:16 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	44 min
Jul 17, 1:39 PM MST	Severe Thunderstorm Warning	FGZ	Gila	51 min
Jul 17, 1:58 PM MST	Special Weather Statement	FGZ		32 min
Jul 17, 2:27 PM MST	Special Weather Statement	FGZ	Coconino	33 min
Jul 17, 2:42 PM MST	Severe Thunderstorm Warning	FGZ	Gila	48 min
Jul 17, 2:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Jul 17, 3:13 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila, Navajo	3 hr
Jul 17, 3:26 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	49 min
Jul 17, 3:39 PM MST	Special Weather Statement	FGZ	Navajo	36 min
Jul 17, 4:01 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	44 min
Jul 17, 4:46 PM MST	Special Weather Statement	FGZ	Yavapai	29 min

Nearby

Flash Flood Warnings in Arizona, 2022 Every flash flood warning in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.