Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 219, NWS Tucson, AZ

September 16, 2026Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 16, 2026, 1:12 PM MST for Pima County, Arizona. It was in force for 3 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: Sep 16, 2026, 1:12 PM MST (20:12 UTC)
Expired: Sep 16, 2026, 4:15 PM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
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 20:14 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, 8.2 hours before the alert went out and 149 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: 1115 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1275 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 94 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 Sep 16, 11:33 AM MST, 1 hour 39 minutes earlier.

Area forecast discussion, Sep 16, 11:33 AM MST, 1 hour 39 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
Sep 16, 5:40 AM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Sep 16, 6:58 AM MST	Areal Flood Advisory	TWC	Graham	3 hr
Sep 16, 8:09 AM MST	Areal Flood Advisory	TWC	Graham, Greenlee	5 hr
Sep 16, 9:27 AM MST	Areal Flood Advisory	TWC	Pima	2 hr
Sep 16, 11:06 AM MST	Flash Flood Warning	TWC	Pima	3 hr
Sep 16, 11:40 AM MST	Flash Flood Warning	TWC	Pima	5 hr
Sep 16, 12:18 PM MST	Severe Thunderstorm Warning	TWC	Pinal	18 min
Sep 16, 12:59 PM MST	Areal Flood Advisory	TWC	Pinal	2 hr
Sep 16, 1:16 PM MST	Areal Flood Advisory	TWC	Pima	108 min
Sep 16, 2:23 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Sep 16, 3:04 PM MST	Flash Flood Warning	TWC	Pima	116 min
Sep 16, 3:11 PM MST	Flash Flood Warning	TWC	Cochise	3 hr
Sep 16, 3:57 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Sep 16, 4:22 PM MST	Areal Flood Advisory	TWC	Cochise	15 min
Sep 16, 4:37 PM MST	Areal Flood Advisory	TWC	Pima	113 min
Sep 16, 4:37 PM MST	Flash Flood Warning	TWC	Cochise	113 min

Nearby

Flash Flood Warnings in Arizona, 2026 Every flash flood warning in 2026

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.