Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 279, NWS Phoenix, AZ

September 12, 2022La Paz County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Sep 12, 2022, 2:17 PM MST for La Paz County, Arizona. It was in force for 97 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 12, 2022, 2:17 PM MST (21:17 UTC)
Expired: Sep 12, 2022, 3:54 PM MST
In force: 97 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 151 km from the middle of the area, began a volume at 21:19 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, 9.3 hours before the alert went out and 260 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: 3041 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -130 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 Sep 12, 1:40 PM MST, 37 minutes earlier.

Area forecast discussion, Sep 12, 1:40 PM MST, 37 minutes before

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In the hours before

Local storm report, Sep 12, 9:33 AM MST, 4 hours 44 minutes before

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Local storm report, Sep 12, 11:42 AM MST, 2 hours 35 minutes before

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Local storm report, Sep 12, 12:29 PM MST, 1 hour 48 minutes before

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Special weather statement, Sep 12, 1:10 PM MST, 1 hour 7 minutes before

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Special weather statement, Sep 12, 1:55 PM MST, 22 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 5:51 PM MST	Special Weather Statement	PSR		39 min
Sep 11, 6:30 PM MST	Special Weather Statement	PSR	Maricopa	60 min
Sep 11, 6:41 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	94 min
Sep 11, 6:51 PM MST	Special Weather Statement	PSR	Maricopa	54 min
Sep 11, 7:16 PM MST	Special Weather Statement	PSR		59 min
Sep 11, 7:19 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	56 min
Sep 11, 7:31 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	59 min
Sep 11, 7:44 PM MST	Severe Thunderstorm Warning	PSR	Pinal	61 min
Sep 11, 8:03 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	27 min
Sep 11, 8:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	64 min
Sep 11, 8:22 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	28 min
Sep 11, 8:39 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	66 min
Sep 11, 8:48 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	42 min
Sep 11, 8:54 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	Maricopa	51 min
Sep 11, 9:03 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	41 min
Sep 11, 9:09 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	36 min
Sep 11, 9:12 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Sep 11, 9:37 PM MST	Special Weather Statement	PSR	Maricopa	53 min
Sep 11, 9:56 PM MST	Special Weather Statement	PSR		49 min
Sep 11, 11:13 PM MST	Areal Flood Warning	PSR	Maricopa	3 hr
Sep 11, 11:45 PM MST	Special Weather Statement	PSR	La Paz	45 min
Sep 12, 12:20 AM MST	Special Weather Statement	PSR		40 min
Sep 12, 12:47 AM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	3 hr
Sep 12, 1:32 AM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	6 hr
Sep 12, 2:05 AM MST	Flood Watch	PSR	Gila, Maricopa, Pinal	26 hr
Sep 12, 2:59 AM MST	Special Weather Statement	PSR		46 min
Sep 12, 3:06 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	24 min
Sep 12, 1:10 PM MST	Special Weather Statement	PSR	La Paz	50 min
Sep 12, 1:55 PM MST	Special Weather Statement	PSR	La Paz	50 min
Sep 12, 2:46 PM MST	Special Weather Statement	PSR	La Paz	89 min
Sep 12, 2:47 PM MST	Special Weather Statement	PSR	La Paz	88 min
Sep 12, 3:04 PM MST	Severe Thunderstorm Warning	PSR	La Paz	56 min
Sep 12, 4:47 PM MST	Special Weather Statement	PSR	Pinal	43 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.