Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 153, NWS Tucson, AZ

August 27, 2026Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 27, 2026, 1:50 PM MST for Santa Cruz 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: Aug 27, 2026, 1:50 PM MST (20:50 UTC)
Expired: Aug 27, 2026, 4:45 PM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 46 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 236 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: 111 J/kg
Mixed-layer CIN: -356 J/kg
Mixed-layer LCL: 3523 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 19 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 27, 10:04 AM MST, 3 hours 46 minutes earlier.

Area forecast discussion, Aug 27, 10:04 AM MST, 3 hours 46 minutes before

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In the hours before

Local storm report, Aug 27, 11:38 AM MST, 2 hours 12 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
1138 AM MST Thu Aug 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0323 PM     Hail             10 NW Rio Rico          31.59N 111.09W
08/26/2026  M0.75 Inch       Santa Cruz         AZ   Cocorahs

            Delayed Report. Penny sized hail with no
            reported damage.

&&

JVT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 5:16 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	34 min
Aug 27, 1:10 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Aug 27, 1:14 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	46 min
Aug 27, 2:02 PM MST	Areal Flood Advisory	TWC	Cochise	118 min
Aug 27, 2:09 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	43 min
Aug 27, 2:18 PM MST	Severe Thunderstorm Warning	TWC	Cochise	42 min
Aug 27, 2:46 PM MST	Flash Flood Warning	TWC	Santa Cruz	3 hr
Aug 27, 3:04 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Aug 27, 3:09 PM MST	Severe Thunderstorm Warning	TWC	Cochise	51 min
Aug 27, 3:26 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Aug 27, 3:52 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	38 min
Aug 27, 4:05 PM MST	Areal Flood Advisory	TWC	Pima	3 hr

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.