Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 121, NWS Phoenix, AZ

August 12, 2022La Paz County, Maricopa County, Yuma County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 12, 2022, 5:14 PM MST for La Paz County, Maricopa County, Yuma 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 12, 2022, 5:14 PM MST (00:14 UTC)
Expired: Aug 12, 2022, 11:03 PM MST
In force: 6 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties La Paz County, AZ, Maricopa County, AZ, Yuma County, AZ

The radar

The Yuma radar (KYUX), 142 km from the middle of the area, began a volume at 00:16 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 00:00Z, 0.2 hours before the alert went out and 265 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: 3207 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: -21 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 Phoenix, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 12, 4:45 PM MST, 29 minutes earlier.

Area forecast discussion, Aug 12, 4:45 PM MST, 29 minutes before

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In the hours before

Local storm report, Aug 12, 3:49 PM MST, 1 hour 25 minutes before

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Special weather statement, Aug 12, 3:56 PM MST, 1 hour 18 minutes before

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Local storm report, Aug 12, 4:06 PM MST, 1 hour 8 minutes before

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Special weather statement, Aug 12, 4:06 PM MST, 1 hour 8 minutes before

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Local storm report, Aug 12, 4:47 PM MST, 27 minutes before

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Special weather statement, Aug 12, 4:50 PM MST, 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 5:02 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	43 min
Aug 12, 5:09 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	61 min
Aug 12, 5:10 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Aug 12, 5:23 PM MST	Dust Storm Warning	PSR	La Paz, Yuma	67 min
Aug 12, 5:25 PM MST	Flash Flood Warning Considerable damage threat	PSR	Yuma	52 min
Aug 12, 5:30 PM MST	Severe Thunderstorm Warning	PSR	Yuma	45 min
Aug 12, 5:44 PM MST	Dust Storm Advisory	PSR	La Paz, Yuma	61 min
Aug 12, 5:48 PM MST	Special Weather Statement	PSR	La Paz	57 min
Aug 12, 6:32 PM MST	Areal Flood Warning	PSR	Maricopa	8 hr
Aug 12, 6:40 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 12, 7:28 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 12, 11:03 PM MST	Areal Flood Warning	PSR	La Paz	4 hr
Aug 12, 11:48 PM MST	Special Weather Statement	PSR		27 min
Aug 13, 3:15 PM MST	Special Weather Statement	PSR		60 min
Aug 13, 3:23 PM MST	Special Weather Statement	PSR		52 min
Aug 13, 4:38 PM MST	Special Weather Statement	PSR		52 min
Aug 13, 4:40 PM MST	Special Weather Statement	PSR	La Paz	50 min
Aug 13, 4:54 PM MST	Flash Flood Warning Considerable damage threat	PSR	Yuma	4 hr
Aug 12, 9:59 PM MST	Special Weather Statement	PSR	Riverside	46 min
Aug 12, 10:13 PM MST	Areal Flood Advisory	PSR	Riverside	16 min
Aug 12, 10:29 PM MST	Flash Flood Warning Considerable damage threat	PSR	Riverside	3 hr
Aug 12, 11:55 PM MST	Special Weather Statement	PSR	Riverside	35 min
Aug 13, 12:27 AM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial, Riverside	4 hr
Aug 13, 1:18 AM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Aug 13, 1:40 AM MST	Flash Flood Warning Considerable damage threat	PSR	Riverside	4 hr
Aug 13, 2:10 PM MST	Severe Thunderstorm Warning	PSR	Riverside, San Bernardino	50 min
Aug 13, 2:25 PM MST	Severe Thunderstorm Warning	PSR	Riverside	50 min
Aug 13, 2:58 PM MST	Special Weather Statement	PSR	Riverside	62 min
Aug 13, 3:06 PM MST	Flash Flood Warning Considerable damage threat	PSR	Riverside	4 hr
Aug 13, 3:41 PM MST	Severe Thunderstorm Warning	PSR	Imperial, Riverside	37 min
Aug 13, 3:48 PM MST	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	4 hr
Aug 13, 3:57 PM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Aug 13, 4:26 PM MST	Special Weather Statement	PSR	Imperial	49 min
Aug 13, 4:42 PM MST	Special Weather Statement	PSR	Imperial	48 min
Aug 13, 4:49 PM MST	Severe Thunderstorm Warning	PSR	Imperial	41 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.