Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 345, NWS Phoenix, AZ

October 15, 2022Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Oct 15, 2022, 8:33 PM MST for Maricopa County, Arizona. It was in force for 4 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: Oct 15, 2022, 8:33 PM MST (03:33 UTC)
Expired: Oct 16, 2022, 12:45 AM MST
In force: 4 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 03:36 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

Tuscon, AZ (KTUS), launched 00:00Z, 3.6 hours before the alert went out and 198 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: 354 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1683 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Oct 15, 7:20 PM MST, 1 hour 13 minutes earlier.

Area forecast discussion, Oct 15, 7:20 PM MST, 1 hour 13 minutes before

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In the hours before

Special weather statement, Oct 15, 7:17 PM MST, 1 hour 16 minutes before

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Local storm report, Oct 15, 7:31 PM MST, 1 hour 2 minutes before

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Local storm report, Oct 15, 7:46 PM MST, 47 minutes before

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Local storm report, Oct 15, 8:01 PM MST, 32 minutes before

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Special weather statement, Oct 15, 8:28 PM MST, 5 minutes before

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Local storm report, Oct 15, 8:33 PM MST, 0 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
Oct 15, 5:01 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	Maricopa, Pinal	44 min
Oct 15, 5:13 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	8 hr
Oct 15, 5:15 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	4 hr
Oct 15, 5:18 PM MST	Special Weather Statement	PSR	Maricopa	42 min
Oct 15, 5:21 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	4 hr
Oct 15, 5:26 PM MST	Special Weather Statement	PSR	Maricopa	34 min
Oct 15, 5:31 PM MST	Special Weather Statement	PSR		44 min
Oct 15, 5:41 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	49 min
Oct 15, 6:01 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	29 min
Oct 15, 6:06 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	9 hr
Oct 15, 6:08 PM MST	Special Weather Statement	PSR	Maricopa	37 min
Oct 15, 6:17 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	28 min
Oct 15, 6:32 PM MST	Special Weather Statement	PSR		43 min
Oct 15, 6:34 PM MST	Special Weather Statement	PSR	Maricopa	41 min
Oct 15, 6:39 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Oct 15, 6:44 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	6 hr
Oct 15, 6:44 PM MST	Special Weather Statement	PSR	Maricopa	46 min
Oct 15, 6:49 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	41 min
Oct 15, 6:53 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	6 hr
Oct 15, 7:00 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Oct 15, 7:17 PM MST	Special Weather Statement	PSR	Maricopa	43 min
Oct 15, 7:25 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Oct 15, 8:28 PM MST	Special Weather Statement	PSR	Maricopa	47 min
Oct 15, 9:01 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	29 min
Oct 15, 9:42 PM MST	Special Weather Statement	PSR	Maricopa	48 min
Oct 15, 9:57 PM MST	Special Weather Statement	PSR	Maricopa	33 min
Oct 15, 10:00 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	45 min
Oct 15, 10:56 PM MST	Special Weather Statement	PSR	Pinal	34 min
Oct 15, 11:46 PM MST	Special Weather Statement	PSR	Pinal	29 min
Oct 16, 12:35 AM MST	Special Weather Statement	PSR		40 min
Oct 16, 12:48 AM MST	Areal Flood Warning	PSR	Maricopa	14 hr
Oct 16, 12:51 AM MST	Areal Flood Warning	PSR	Maricopa	5 hr
Oct 16, 12:52 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	38 min
Oct 16, 1:08 AM MST	Areal Flood Warning	PSR	Maricopa	5 hr
Oct 16, 1:26 AM MST	Special Weather Statement	PSR		49 min
Oct 16, 1:29 AM MST	Special Weather Statement	PSR		46 min
Oct 16, 1:36 AM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	39 min
Oct 16, 1:39 AM MST	Special Weather Statement	PSR		51 min
Oct 16, 2:14 AM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	15 min
Oct 16, 2:28 AM MST	Special Weather Statement	PSR	Maricopa	47 min
Oct 16, 2:52 AM MST	Areal Flood Warning	PSR	Maricopa	3 hr
Oct 16, 4:41 AM MST	Special Weather Statement	PSR	Pinal	49 min
Oct 16, 7:59 AM MST	Special Weather Statement	PSR	Maricopa	46 min
Oct 16, 8:47 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Oct 16, 10:23 AM MST	Special Weather Statement	PSR	Pinal	37 min
Oct 16, 11:03 AM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	3 hr
Oct 16, 11:30 AM MST	Special Weather Statement	PSR	Pinal	45 min
Oct 16, 1:52 PM MST	Special Weather Statement	PSR	Pinal	38 min
Oct 16, 3:10 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	34 min
Oct 15, 5:11 PM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Oct 15, 5:17 PM MST	Special Weather Statement	PSR	Imperial	43 min
Oct 15, 5:46 PM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial	4 hr
Oct 15, 7:52 PM MST	Areal Flood Warning	PSR	Imperial	6 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.