Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 104, NWS Flagstaff, AZ

July 29, 2022Coconino County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 29, 2022, 2:37 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: Jul 29, 2022, 2:37 PM MST (21:37 UTC)
Expired: Jul 29, 2022, 5:45 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 21:37 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, 9.6 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: 2 J/kg
Mixed-layer CIN: -245 J/kg
Mixed-layer LCL: 3144 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: -10 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 29, 2:37 PM MST, 0 minutes earlier.

Area forecast discussion, Jul 29, 2:37 PM MST, 0 minutes before

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In the hours before

Local storm report, Jul 29, 8:38 AM MST, 5 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
838 AM MST FRI JUL 29 2022

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

0915 PM     FLASH FLOOD      2 E CHINLE              36.15N 109.55W
07/26/2022                   APACHE             AZ   EMERGENCY MNGR

            A FEW PEOPLE WERE EVACUATED FROM A HOME THAT
            FLOODED IN EASTERN CHINLE NEAR CANYON DE
            CHELLY/CHINLE WASH. TIME ESTIMATED FROM
            RADAR.

&&

TM

Local storm report, Jul 29, 10:10 AM MST, 4 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1010 AM MST FRI JUL 29 2022

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

0925 PM     FLASH FLOOD      1 ENE STEAMBOAT CANYON  35.75N 109.84W
07/27/2022                   APACHE             AZ   EMERGENCY MNGR

            FLOODING IN RURAL STEAMBOAT CANYON AZ. PHOTO
            EVIDENCE OF WATER/MUD WASHING OUT A
            RESIDENTIAL ROAD. TIME OF EVENT ESTIMATED
            FROM RADAR.

&&

TM

Local storm report, Jul 29, 10:54 AM MST, 3 hours 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1054 AM MST FRI JUL 29 2022

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

0800 PM     FLASH FLOOD      3 SSE HARDROCK          36.08N 110.44W
07/28/2022                   NAVAJO             AZ   PUBLIC

            PHOTO EVIDENCE OF WHITE VALLEY ROAD - N8031
            COMPLETELY WASHED OUT. NOT SURE THE EXACT
            TIME THE ROAD WASHED OUT, SO THE TIME STAMP
            IS THE TIME OF THE REPORT.

&&

TM

Local storm report, Jul 29, 11:09 AM MST, 3 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1109 AM MST FRI JUL 29 2022

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

0150 PM     FLASH FLOOD      K'AI'BII'TO             36.61N 111.07W
07/27/2022                   COCONINO           AZ   PUBLIC

            PHOTO EVIDENCE OF WASHED OUT ROADS IN THE
            AREA. TIME IS ESTIMATED.

&&

TM

Local storm report, Jul 29, 1:51 PM MST, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
151 PM MST FRI JUL 29 2022

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

0120 PM     FLASH FLOOD      3 NW LOW MOUNTAIN       35.97N 110.14W
07/29/2022                   NAVAJO             AZ   PUBLIC

            PUBLIC REPORTED 6 FEET OF WATER IN BURNT
            CORN WASH ON NAVAJO NATION.

&&

BAIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 5:25 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Navajo	3 hr
Jul 28, 5:45 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 28, 6:47 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 28, 10:39 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 29, 11:23 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 29, 12:17 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache, Navajo	3 hr
Jul 29, 12:52 PM MST	Areal Flood Advisory	FGZ	Coconino, Yavapai	3 hr
Jul 29, 1:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 29, 2:17 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 29, 2:22 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.