Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 136, NWS Tucson, AZ

August 13, 2026Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 13, 2026, 1:37 PM MST for Cochise County, Arizona. It was in force for 5 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 13, 2026, 1:37 PM MST (20:37 UTC)
Expired: Aug 13, 2026, 6:30 PM MST
In force: 5 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 83 km from the middle of the area, began a volume at 20:39 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, 8.6 hours before the alert went out and 270 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: 70 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 55 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 13, 1:15 PM MST, 22 minutes earlier.

Area forecast discussion, Aug 13, 1:15 PM MST, 22 minutes before

Area Forecast Discussion
National Weather Service Tucson AZ
115 PM MST Thu Aug 13 2026

.SYNOPSIS...

Today scattered showers and thunderstorms with some of the
storms capable to produce brief heavy rain. Drier and hotter
conditions return this weekend with an Extreme Heat Watch issued
for Monday though Wednesday.

&&

.DISCUSSION...

Where there was clearing this morning showers and thunderstorms
have developed. Substantial moisture remains in place with
satellite derived PWATs around 1.3" to 1.7", higher values Tucson
westward and surface dewpoints in the upper 50s to low 60s.
The Weather Prediction Center (WPC) has areas Tucson eastward
in Slight risk for excessive rainfall. The 12Z HREF highlights
this area with a 10-50% chance for greater than 1 inch of
rainfall, in a 3 hour period, with pockets of up to 2 inches
possible. While there is suitable instability in place, the main
concern today is flash flooding. There is a chance a storm or
two could produce gusty to strong outflow winds with small hail.
Rainfall overnight and over the past several days has made the
area highly susceptible for flash flooding thus any more rain
that falls will have a much higher chance to cause impacts.
Temperatures today will be 5 to 7 degrees below normal.

Dry air begins to move into the area beginning tomorrow moving
in across the area through weekend. Enough moisture will be in
place for daily chances for afternoon into the evening showers
and thunderstorms though they will mainly be to the south and
east of Tucson. During this time temperatures begin to gradually
rise eventually pushing high temperatures 5 to 7 degrees above
normal. This will bring HeatRisk to Major for the lower deserts
and Extreme for some locales including Tucson and Safford by
Monday. Due to this, an Extreme Heat Watch has been issued
starting Monday through Wednesday for a majority of Pima county,
Pinal county, and southern Graham and Greenlee counties.
Temperatures begin to cool Thursday and chances for daily
thunderstorms begin to increase.

&&

.AVIATION... Valid through 15/00Z.

Area of showers and isolated thunderstorms with ceiling bases
7-11k ft AGL from KTUS east with gusty erratic winds of 30-40
kts possible with any thunderstorm now through 14/05Z. Outside
of storms SFC winds WLY/NWLY at 8-12 kts with ocnl gusts to 20
kts. SFC winds light and terrain driven between 14/06Z and
14/16Z. Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...

Scattered showers and thunderstorms today with the main concern
being heavy rainfall leading to flash flooding, gusty outflow
winds, and lightning. This system will then draw in drier air
Friday into the weekend resulting in a low- grade monsoon
pattern with chance of storms each day mainly south and east of
Tucson. A little more active monsoon pattern sets in early next
week. Minimum relative humidity will be 20-40 percent today
lowering to around 15-30 percent thereafter. Temperatures will
be below normal today, then warm up again to above normal this.
Outside of thunderstorms, winds terrain driven to around 10 mph
with occasional afternoon gusts to 20 mph.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
Extreme Heat Watch from Monday morning through Wednesday
evening for AZZ501-502-504>506-509.

&&

Malarkey

Visit us on Facebook, X, YouTube, and at weather.gov/Tucson

In the hours before

Local storm report, Aug 13, 7:40 AM MST, 5 hours 57 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
740 AM MST Thu Aug 13 2026

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

0232 AM     Flash Flood      12 ENE Three Points     32.11N 111.08W
08/13/2026                   Pima               AZ   911 Call Center

            Pascua Yaqui Dispatch reported a swift water
            rescue with 1 adult and 2 juveniles with the
            vehicle submerged to chin level. No reported
            injuries.

&&

CLP

Local storm report, Aug 13, 8:10 AM MST, 5 hours 27 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
810 AM MST Thu Aug 13 2026

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

0230 AM     Flash Flood      11 WSW Tucson           32.12N 111.06W
08/13/2026                   Pima               AZ   911 Call Center

            Pascua Yaqui Dispatch reported the entirety
            of the Black Wash was flowing across Pascua
            Yaqui Tribe with several roads that
            intercept the wash were impassable due to
            flash flooding. Time was estimated from
            initial impact calls from dispatch.

&&

CLP

Local storm report, Aug 13, 8:50 AM MST, 4 hours 47 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
850 AM MST Thu Aug 13 2026

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

0257 AM     Flash Flood      12 WSW Tucson           32.13N 111.08W
08/13/2026                   Pima               AZ   911 Call Center

            Dispatch center reported swift water rescue
            with a submerged vehicle in standing water
            at the junction of Black Wash and W Camino
            Tierra. No injuries.

&&

CLP

Local storm report, Aug 13, 8:54 AM MST, 4 hours 43 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
854 AM MST Thu Aug 13 2026

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

0312 AM     Flash Flood      12 WSW Tucson           32.13N 111.07W
08/13/2026                   Pima               AZ   911 Call Center

            Dispatch center reported swift water rescue
            near W Jeffrey Road and Mark Rd near Black
            Wash vehicle stuck in standing water. No
            injuries reported.

&&

CLP

Local storm report, Aug 13, 9:44 AM MST, 3 hours 53 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
944 AM MST Thu Aug 13 2026

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

0756 AM     Flash Flood      8 SSW Summerhaven       32.33N 110.80W
08/13/2026                   Pima               AZ   County Official

            Pima County Sheriff Office reports a swift
            water rescue on the north end of Sabino
            Canyon performed by bystanders; Minor
            injuries sustained.

&&

MJS

Local storm report, Aug 13, 9:56 AM MST, 3 hours 41 minutes before

Preliminary Local Storm Report
National Weather Service Tucson AZ
956 AM MST Thu Aug 13 2026

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

0946 AM     Flash Flood      4 SSW Picture Rocks     32.29N 111.28W
08/13/2026                   Pima               AZ   County Official

            Road closed due to flash flooding at
            intersection of Manville Rd and North
            Reservation Road.

&&

MJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 9:58 PM MST	Areal Flood Advisory	TWC	Pima	28 hr
Aug 12, 11:40 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	2 hr
Aug 13, 12:28 AM MST	Flash Flood Warning	TWC	Pinal	3 hr
Aug 13, 1:49 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 13, 3:20 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 13, 8:56 AM MST	Areal Flood Advisory	TWC	Pima	6 hr
Aug 13, 11:19 AM MST	Extreme Heat Watch	TWC	Graham, Greenlee, Pima, Pinal	46 hr
Aug 13, 12:35 PM MST	Flash Flood Warning	TWC	Cochise	3 hr
Aug 13, 1:00 PM MST	Flash Flood Warning	TWC	Graham	3 hr
Aug 13, 2:11 PM MST	Severe Thunderstorm Warning	TWC	Cochise	49 min
Aug 13, 2:45 PM MST	Areal Flood Advisory	TWC	Santa Cruz	3 hr
Aug 13, 2:47 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	3 hr
Aug 13, 4:38 PM MST	Flash Flood Warning	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.