Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 30, NWS Tucson, AZ

July 14, 2026Graham County, Pinal County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 14, 2026, 4:28 PM MST for Graham County, Pinal 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 outline as issued.

The facts

Issued
Jul 14, 2026, 4:28 PM MST (23:28 UTC)
Expired
Jul 14, 2026, 7:30 PM MST
In force
3 hr
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

Counties Graham County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 111 km from the middle of the area, began a volume at 23:30 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Phoenix, AZ (KPSR), launched 12:00Z, 11.5 hours before the alert went out and 143 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-pSkew-T log-p diagram, Phoenix, AZ at 12:00Z on 2026-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phoenix, AZ at 12:00Z on 2026-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1895 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

142 
WGUS55 KTWC 142328
FFWTWC
AZC009-021-150230-
/O.NEW.KTWC.FF.W.0030.260714T2328Z-260715T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
428 PM MST Tue Jul 14 2026

The National Weather Service in Tucson has issued a

* Flash Flood Warning for...
  Western Graham County in southeastern Arizona...
  East Central Pinal County in southeastern Arizona...

* Until 730 PM MST.

* At 428 PM MST, gauge reports indicated thunderstorms producing
  heavy rain across the warned area. Between 1 and 2 inches of rain
  have fallen. Additional rainfall amounts of 0.5 to 1 inch are
  possible in the warned area. Flash flooding is ongoing or expected
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Gauges reported.

  IMPACT...Flash flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Dudleyville and Aravaipa Canyon Wilderness.

This includes Route 77 between mile markers 125 and 131.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3299 11053 3299 11045 3297 11038 3289 11040
      3285 11045 3283 11058 3284 11070 3287 11075
      3295 11074 3298 11063

FLASH FLOOD...GAUGE INDICATED

$$

KM
2 follow-up statements
427 
WGUS75 KTWC 150018
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
518 PM MST Tue Jul 14 2026

AZC009-021-150230-
/O.CON.KTWC.FF.W.0030.000000T0000Z-260715T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Graham AZ-Pinal AZ-
518 PM MST Tue Jul 14 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MST THIS
EVENING FOR WESTERN GRAHAM AND EAST CENTRAL PINAL COUNTIES...

At 518 PM MST, Doppler radar indicated thunderstorms produced heavy
rain across the warned area. Between 1 and 2 inches of rain have
fallen. Flooding impacts will continue, but no additional rainfall is
expected. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Dudleyville and Aravaipa Canyon Wilderness.

This includes Route 77 between mile markers 125 and 131.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3299 11053 3299 11045 3297 11038 3289 11040
      3285 11045 3283 11058 3284 11070 3287 11075
      3295 11074 3298 11063

FLASH FLOOD...RADAR INDICATED

$$

KM
562 
WGUS75 KTWC 150223
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
723 PM MST Tue Jul 14 2026

AZC009-021-150233-
/O.EXP.KTWC.FF.W.0030.000000T0000Z-260715T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Graham AZ-Pinal AZ-
723 PM MST Tue Jul 14 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 730 PM MST THIS EVENING FOR
WESTERN GRAHAM AND EAST CENTRAL PINAL COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3299 11053 3299 11045 3297 11038 3289 11040
      3285 11045 3283 11058 3284 11070 3287 11075
      3295 11074 3298 11063

$$

KM

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 Jul 14, 12:31 PM MST, 3 hours 57 minutes earlier. Its key messages:

  • Scattered thunderstorms are expected this afternoon and evening with a threat of heavy rainfall and strong outflow winds.
  • Daily chances for thunderstorms will continue through the week with increasing moisture Thursday and Friday bringing more widespread chances. Slight Risk for Excessive Rainfall Thursday and Friday, raising the risk for flash flooding.
  • High temperatures will sit just below normal through mid-week with before cooling further by the end of the week.
Area forecast discussion, Jul 14, 12:31 PM MST, 3 hours 57 minutes before
Area Forecast Discussion
National Weather Service Tucson AZ
1231 PM MST Tue Jul 14 2026

.KEY MESSAGES...
- Scattered thunderstorms are expected this afternoon and
  evening with a threat of heavy rainfall and strong outflow
  winds.

- Daily chances for thunderstorms will continue through the week
  with increasing moisture Thursday and Friday bringing more
  widespread chances. Slight Risk for Excessive Rainfall
  Thursday and Friday, raising the risk for flash flooding.

- High temperatures will sit just below normal through mid-week
  with before cooling further by the end of the week.

&&

.SYNOPSIS...
There will be thunderstorm chances each afternoon and
evening through the coming week with day to day variability in
location and severity, with more widespread chances for showers
and thunderstorms forecast Thursday and Friday. Scattered
thunderstorms today will bring a threat of heavy rainfall and
strong wind gusts. High temperatures will sit just below normal
through mid-week before cooling further by the end of the week.

&&

.DISCUSSION...
The atmosphere has a healthy amount of moisture across the
region. Precipitable water content range from 1.80 inches in
Phoenix to 1.30 inches in southeast Cochise County based on the
latest satellite imagery. Thunderstorms are firing up across the
region with a storm motion of westerly. With the abundant
moisture in place and the CAPE values rising up to 2700 J/kg by
the afternoon, the main threat today will be flash flooding due
to the heavy rainfall. The secondary threat will be gusty
outflows. HREF models indicate 5-20% for gusts greater than 35
mph this afternoon.

Tomorrow: The upper pattern flow will switch from the northeast,
bringing energy down from the White Mountains into the valleys.
There will be drier air in the upper levels to support robust
thunderstorms. The HREF probabilities for strong gusty winds
increases; highest areas (greater than 50%) will be the line
from Tucson to Safford and northwest. The shift of threats
become wind as the main threat with secondary threat of flash
flooding. Localize blowing dust is possible.

Thursday and Friday: An easterly wave will be moving into the
region, enhancing the thunderstorm activity for the region. This
will keep and even nudge precipitable water content up through
this period. Ensemble models has Tucson near the 95th percentile
by Thursday. Chances for 24 hour rainfall amounts greater than
0.75 inches will increase by the afternoon into the late night.
NBM chances has 45% in the Catalinas, 45% in Sierra Vista, and
up to 63% in Nogales. Areas along the Mogollon Rim has over 70%
chances for 0.75 inches. WPC has highlighted a Slight Risk (15%)
for Excessive Rainfall and therefore elevating the risk for
flash flooding. Especially when the soils are becoming more
saturated since the weekend. Friday has the same indicators but
the upper level flow slows down and potentially kinking the
thunderstorm growth, or also known as clouded over. Details will
still need to be worked as we closer and allow for more model
runs to come in.

Weekend: Monsoon pattern will continue with daily chances for
thunderstorms. The high pressure center will stay near the Four
Corners, continuing the easterly flow across the region.

&&

.AVIATION... Valid through 16/00Z.
SCT-BKN ceilings 10k-15k through the afternoon and late
evening. Scattered thunderstorm redevelopment expected after
14/19Z and again after 15/19Z. Thunderstorm activity diminishes
after 15/03Z. Heavy rainfall, mountain obscurations, and erratic
strong wind gusts 35-40 kts possible with any thunderstorm.
Outside of thunderstorms, surface winds generally light and
under 10 kts. Aviation discussion not updated for TAF
amendments.

&&

.FIRE WEATHER...
Daily chances for thunderstorms will continue
each afternoon and evening through the coming week with day to
day variability. More widespread chances for showers and
thunderstorms are possible Thursday and Friday. Minimum
relative humidity 25-30 percent in the lower desert locations
and above 40 percent in the mountains this week. Winds this week
will remain mainly light and under 15 mph, though strong and
erratic winds will be possible with any thunderstorm.&&

.TWC WATCHES/WARNINGS/ADVISORIES...
None.

&&

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In the hours before

Local storm report, Jul 14, 1:32 PM MST, 2 hours 56 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
132 PM MST Tue Jul 14 2026

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

1205 AM     Flash Flood      6 ESE Tucson            32.18N 110.79W
07/14/2026                   Pima               AZ   Broadcast Media

            Swift water rescue around 1205 AM. The
            Pantano Wash upstream at Houghton Rd had
            around 500-715 cfs.

&&

JRM
Local storm report, Jul 14, 1:39 PM MST, 2 hours 49 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
139 PM MST Tue Jul 14 2026

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

1205 AM     Flash Flood      6 ESE Tucson            32.18N 110.79W
07/14/2026                   Pima               AZ   Broadcast Media

            Corrects previous flash flood report from 6
            ESE Tucson. Swift water rescue around 1205
            AM. The Pantano Wash upstream at Houghton Rd
            had around 500-715 cfs. The road was closed
            at 630 PM the previous night.

&&

JRM
Local storm report, Jul 14, 4:17 PM MST, 11 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
417 PM MST Tue Jul 14 2026

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

0402 PM     Tstm Wnd Gst     14 E Dudleyville        32.94N 110.49W
07/14/2026  M54 MPH          Pinal              AZ   Mesonet

            Mesonet station QHRA3 Horse Camp gusted to
            54 mph. Time estimated by radar.

&&

JVT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 6:49 PM MSTAreal Flood AdvisoryTWCPinal116 min
Jul 14, 3:52 PM MSTSevere Thunderstorm WarningTWCPinal38 min
Jul 14, 4:21 PM MSTSevere Thunderstorm WarningTWCPinal39 min

Nearby

Flash Flood Warnings in Arizona, 2026Every 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.