Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 16, NWS Flagstaff, AZ

June 29, 2022Coconino County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jun 29, 2022, 2:05 PM MST for Coconino 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: Jun 29, 2022, 2:05 PM MST (21:05 UTC)
Expired: Jun 29, 2022, 5:00 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Coconino County, AZ

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 21:08 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, 9.1 hours before the alert went out and 68 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: 57 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 3504 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: 6 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 Jun 29, 8:49 AM MST, 5 hours 16 minutes earlier.

Area forecast discussion, Jun 29, 8:49 AM MST, 5 hours 16 minutes before

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In the hours before

Special weather statement, Jun 29, 11:13 AM MST, 2 hours 52 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1113 AM MST Wed Jun 29 2022

AZZ007-008-037-291830-
Yavapai County Valleys and Basins-Coconino Plateau-Yavapai County
Mountains-
1113 AM MST Wed Jun 29 2022

...A strong thunderstorm will create impacts near Seligman and
portions of I-40 through 1130 AM MST...

At 1111 AM MST, Doppler radar was tracking a strong thunderstorm 8
miles south of Seligman, or 38 miles northwest of Chino Valley. This
storm is moving northeast at 5 mph.

HAZARD...Winds in excess of 40 mph and pea 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...
Seligman.

This includes the following highways...
 Business Interstate 40 between mile markers 140 and 141.
 Route 66 between mile markers 137 and 139.
 Interstate 40 between mile markers 118 and 133.

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 3512 11281 3515 11293 3523 11298 3541 11292
      3529 11266
TIME...MOT...LOC 1811Z 215DEG 4KT 3521 11287

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

EFL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 5:11 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	49 min
Jun 28, 5:40 PM MST	Areal Flood Advisory	FGZ	Yavapai	110 min
Jun 28, 5:47 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	27 min
Jun 28, 5:58 PM MST	Special Weather Statement	FGZ	Yavapai	32 min
Jun 28, 6:12 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	48 min
Jun 28, 6:58 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	32 min
Jun 28, 6:59 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jun 28, 7:35 PM MST	Special Weather Statement	FGZ	Yavapai	25 min
Jun 29, 11:13 AM MST	Special Weather Statement	FGZ		17 min
Jun 29, 11:53 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jun 29, 12:03 PM MST	Areal Flood Advisory	FGZ	Coconino	117 min
Jun 29, 1:40 PM MST	Areal Flood Advisory	FGZ	Coconino, Yavapai	2 hr
Jun 29, 1:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	2 hr
Jun 29, 2:25 PM MST	Areal Flood Advisory	FGZ	Apache	83 min
Jun 29, 2:30 PM MST	Special Weather Statement	FGZ		30 min
Jun 29, 2:47 PM MST	Special Weather Statement	FGZ	Coconino	43 min
Jun 29, 2:57 PM MST	Special Weather Statement	FGZ		33 min
Jun 29, 3:13 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Jun 29, 3:23 PM MST	Special Weather Statement	FGZ		52 min
Jun 29, 3:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jun 29, 4:00 PM MST	Areal Flood Advisory	FGZ	Apache, Navajo	2 hr
Jun 29, 4:06 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Jun 29, 4:28 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	17 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.