Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 285, NWS Flagstaff, AZ

August 24, 2022Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 24, 2022, 2:50 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 24, 2022, 2:50 PM MST (21:50 UTC)
Expired: Aug 24, 2022, 6:00 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 21:51 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, 9.8 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: 164 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 3381 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 23 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 Aug 24, 2:38 PM MST, 12 minutes earlier.

Area forecast discussion, Aug 24, 2:38 PM MST, 12 minutes before

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In the hours before

Local storm report, Aug 24, 9:02 AM MST, 5 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
902 AM MST WED AUG 24 2022

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

0100 PM     FLASH FLOOD      1 W PAULDEN             34.89N 112.48W
08/23/2022                   YAVAPAI            AZ   COUNTY OFFICIAL

            FLASH FLOOD REPORTED ON BIG CHINO WASH BY
            YAVAPAI COUNTY FLOOD CONTROL DISTRICT. BCWA3
            REPORTED A 4.64 FT RISE.

&&

ET

Special weather statement, Aug 24, 12:29 PM MST, 2 hours 21 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1229 PM MST Wed Aug 24 2022

AZZ015-038-242000-
Western Mogollon Rim-Oak Creek and Sycamore Canyons-
1229 PM MST Wed Aug 24 2022

...A strong thunderstorm will impact portions of Coconino County
through 100 PM MST...

At 1228 PM MST, Doppler radar was tracking a strong thunderstorm over
Mountainaire, or 8 miles south of Flagstaff, moving northwest at 5
mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
Flagstaff, Mountainaire, Kachina Village, Cave Springs Campground,
Pine Flat Campground, Sterling Fish Hatchery, West Fork Of Oak Creek,
Lower Lake Mary and Canyon Vista Campground.

This includes the following highways...
 Route 66 between mile markers 192 and 195.
 Interstate 40 between mile markers 188 and 197.
 Interstate 17 between mile markers 326 and 339.
 State Route 89A between mile markers 385 and 398.

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 3513 11154 3497 11163 3501 11189 3526 11176
TIME...MOT...LOC 1928Z 112DEG 5KT 3508 11167

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

ET

Local storm report, Aug 24, 1:17 PM MST, 1 hour 33 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 23, 5:07 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	23 min
Aug 23, 5:13 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 23, 5:32 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 23, 5:36 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	39 min
Aug 23, 6:14 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 24, 11:27 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 24, 11:53 AM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 24, 11:56 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache, Coconino, Navajo	3 hr
Aug 24, 12:08 PM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 24, 12:29 PM MST	Special Weather Statement	FGZ		31 min
Aug 24, 12:34 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 24, 12:45 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Navajo	3 hr
Aug 24, 1:01 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	17 min
Aug 24, 1:13 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache, Navajo	3 hr
Aug 24, 1:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 24, 1:58 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 24, 2:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 24, 4:02 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr

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.