Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 271, NWS Flagstaff, AZ

August 23, 2022Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 23, 2022, 3:45 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: Aug 23, 2022, 3:45 PM MST (22:45 UTC)
Expired: Aug 23, 2022, 6:45 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 22:49 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.8 hours before the alert went out and 98 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4122 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 53 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 Aug 23, 2:11 PM MST, 1 hour 34 minutes earlier.

Area forecast discussion, Aug 23, 2:11 PM MST, 1 hour 34 minutes before

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In the hours before

Special weather statement, Aug 23, 12:26 PM MST, 3 hours 19 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1226 PM MST Tue Aug 23 2022

AZZ016-018-231945-
Northern Gila County-Eastern Mogollon Rim-
1226 PM MST Tue Aug 23 2022

...A strong thunderstorm will impact portions of Gila and Coconino
Counties through 1245 PM MST...

At 1226 PM MST, Doppler radar was tracking a strong thunderstorm over
Mead Ranch, or 10 miles northeast of Payson. This storm was nearly
stationary.

HAZARD...Wind gusts up to 50 mph and penny size hail.

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...
Payson, Star Valley, Flowing Springs, Mesa Del Caballo, Tonto
Village, Geronimo Estates, Freedom Acres, Kohls Ranch, Whispering
Pines, Mead Ranch, Bear Flat, Upper Tonto Creek Campground, Ponderosa
Campground, Water Wheel Burn At Houston Mesa Rd-
S, Beaver Valley and Water Wheel Burn At Houston Mesa Rd-N.

This includes State Route 260 between mile markers 255 and 271.

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.

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 3444 11118 3430 11104 3415 11118 3436 11139
TIME...MOT...LOC 1926Z 050DEG 3KT 3433 11118

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

ET

Special weather statement, Aug 23, 3:05 PM MST, 40 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
Aug 22, 5:09 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 22, 5:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 23, 12:26 PM MST	Special Weather Statement	FGZ		19 min
Aug 23, 12:53 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	37 min
Aug 23, 1:24 PM MST	Severe Thunderstorm Warning	FGZ	Gila	36 min
Aug 23, 1:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	6 hr
Aug 23, 3:05 PM MST	Special Weather Statement	FGZ	Yavapai	25 min
Aug 23, 3:09 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	36 min
Aug 23, 3:15 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	45 min
Aug 23, 3:17 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	28 min
Aug 23, 3:36 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Aug 23, 3:50 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	25 min
Aug 23, 3:52 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	23 min
Aug 23, 3:55 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 23, 4:05 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	25 min
Aug 23, 4:06 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Aug 23, 4:25 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	50 min
Aug 23, 4:44 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	6 hr
Aug 23, 4:56 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	34 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.