Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 114, NWS Tucson, AZ

August 20, 2022Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 20, 2022, 1:43 PM MST for Pima County, Arizona. It was in force for 50 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: Aug 20, 2022, 1:43 PM MST (20:43 UTC)
Expired: Aug 20, 2022, 2:33 PM MST
In force: 50 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 20:46 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 12:00Z, 8.7 hours before the alert went out and 84 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: 639 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 630 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 29 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 Tucson, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 20, 1:38 PM MST, 5 minutes earlier.

Area forecast discussion, Aug 20, 1:38 PM MST, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 5:43 PM MST	Areal Flood Advisory	TWC	Pima	99 min
Aug 19, 5:46 PM MST	Areal Flood Advisory	TWC	Pima	4 hr
Aug 19, 6:58 PM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	5 hr
Aug 19, 8:12 PM MST	Areal Flood Advisory	TWC	Pima	59 hr
Aug 19, 9:35 PM MST	Flash Flood Warning	TWC	Santa Cruz	110 min
Aug 19, 11:01 PM MST	Special Weather Statement	TWC		59 min
Aug 20, 2:35 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 20, 4:51 AM MST	Areal Flood Advisory	TWC	Pinal	114 min
Aug 20, 5:27 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pinal	3 hr
Aug 20, 6:41 AM MST	Areal Flood Advisory	TWC	Pinal	3 hr
Aug 20, 7:41 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	11 hr
Aug 20, 7:53 AM MST	Areal Flood Advisory	TWC	Pinal	4 hr
Aug 20, 8:18 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	3 hr
Aug 20, 8:33 AM MST	Areal Flood Advisory	TWC	Pinal	3 hr
Aug 20, 8:45 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	8 hr
Aug 20, 8:49 AM MST	Areal Flood Advisory	TWC	Graham, Pinal	3 hr
Aug 20, 8:53 AM MST	Areal Flood Advisory	TWC	Cochise, Graham	4 hr
Aug 20, 11:17 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 20, 1:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	58 min
Aug 20, 1:47 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Aug 20, 3:17 PM MST	Areal Flood Advisory	TWC	Pima	118 min
Aug 20, 3:45 PM MST	Special Weather Statement	TWC		45 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.