Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 245, NWS Flagstaff, AZ

August 19, 2022Gila County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 19, 2022, 3:55 PM MST for Gila County, Arizona. It was in force for 6 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 19, 2022, 3:55 PM MST (22:55 UTC)
Expired: Aug 19, 2022, 10:00 PM MST
In force: 6 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Gila County, AZ

The radar

The Flagstaff radar (KFSX), 93 km from the middle of the area, began a volume at 22:59 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, 10.9 hours before the alert went out and 115 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: 578 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1151 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: 18 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 19, 2:27 PM MST, 1 hour 28 minutes earlier.

Area forecast discussion, Aug 19, 2:27 PM MST, 1 hour 28 minutes before

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In the hours before

Local storm report, Aug 19, 12:30 PM MST, 3 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1230 PM MST FRI AUG 19 2022

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

0745 PM     FLASH FLOOD      1 E JOSEPH CITY         34.96N 110.31W
08/18/2022                   NAVAJO             AZ   DEPT OF HIGHWAYS

            INTERSTATE 40 WAS CLOSED DUE TO FLOODING ON
            THE EASTERN SIDE OF JOSEPH CITY.

&&

MAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 5:35 PM MST	Special Weather Statement	FGZ	Navajo	25 min
Aug 18, 6:19 PM MST	Special Weather Statement	FGZ		26 min
Aug 18, 8:07 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	8 hr
Aug 19, 4:29 AM MST	Areal Flood Advisory	FGZ	Apache	3 hr
Aug 19, 8:43 AM MST	Areal Flood Warning	FGZ	Coconino	10 hr
Aug 19, 4:04 PM MST	Special Weather Statement	FGZ		11 min
Aug 19, 4:34 PM MST	Special Weather Statement	FGZ		26 min
Aug 19, 4:45 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	5 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.