Flash Flood Warning

NWS Tucson AZ · US

Updated WEA requested

This event was updated at 2026-09-17 03:42:00 UTC.

English

Flash Flood Warning Remains In Effect Until 845 PM MST This Evening For Northeastern Pima County

Event: Flash Flood Warning
Issued: 2026-09-17 01:10:00 UTC
Onset: 2026-09-17 01:10:00 UTC
Message expires: 2026-09-17 03:45:00 UTC
Expected end: 2026-09-17 03:45:00 UTC
Category: Meteorological
Urgency: Immediate
Severity: Severe
Certainty: Likely
Response: Avoid

Wireless alert

National Weather Service: A FLASH FLOOD WARNING is in effect for this area until 8:45 PM MST. This is a dangerous and life-threatening situation. Do not attempt to travel unless you are fleeing an area subject to flooding or under an evacuation order.

Description

Overview

At 610 PM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 1.5 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly.

Hazard

Life threatening flash flooding. Thunderstorms producing flash flooding.

Source

Radar indicated.

Impacts

Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... Tucson, Oro Valley, Marana, Casas Adobes, Drexel Heights, Flowing Wells, Pascua Pueblo Yaqui Reservation, Tortolita, Tucson Mountain Park, Saguaro National Park West, Tucson Estates, Valencia West, Catalina Foothills, Picture Rocks, Ryan AirField and Dove Mountain. This includes the following highways... Route 86 between mile markers 160 and 170. Route 77 between mile markers 70 and 76. Interstate 10 between mile markers 240 and 258. This includes the following Flash Flood Prone Locations... 1st Ave north of Fort Lowell Rd, Stone Ave at Mabel St, Silverbell Rd near Ina Rd, Camino De La Tierra at the Rillito River, Camino de Oeste from Sweetwater to Gates Pass, Ironwood Hills Dr from Shannon to Camino de Oeste, Mark Rd from Jeffery Rd to Los Reales Rd, Overton Rd at Canada del Oro, Sunset Rd west of Camino de Oeste and Black Wash at S Camino de Oeste.

Instructions

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.

Affected areas

Pima County, AZ

Public contact

Issuer: NWS Tucson AZ
Website: http://www.weather.gov

Spanish

Event: Flash Flood Warning
Onset: 2026-09-17 01:10:00 UTC
Message expires: 2026-09-17 03:45:00 UTC
Expected end: 2026-09-17 03:45:00 UTC
Category: Meteorological
Urgency: Immediate
Severity: Severe
Certainty: Likely
Response: Avoid

Wireless alert

Servicio Nacional de Meteorologia: AVISO DE INUNDACIONES REPENTINAS en efecto para esta area hasta las 8:45 PM MST. Esta es una situacion peligrosa y amenaza la vida. No intente viajar a menos que sea para abandonar un area propensa a inundaciones o bajo una orden de desalojo.

Affected areas

Pima County, AZ

Public contact

Issuer: NWS Tucson AZ
Website: http://www.weather.gov

Message record

Received: 2026-09-17 01:10:50 UTC
Issue to receipt: ~50s
CAP status: Actual
CAP message type: Update
Lifecycle: Updated
Source: NWWS-OI
Feed: NWWS
Recovered: No

CAP routing and identity

ULID: 01M2PEN5S84B7YR4R4K299CET2
Identifier: urn:oid:2.49.0.1.840.0.c00ccb98ceed8a3219f235d5b594d7bae9cfeee5.001.1
Sender: w-nws.webmaster@noaa.gov
Scope: Public
CAP source: 211803 v2.3.0
Handling codes: IPAWSv1.0
Issuing office: NWS Tucson AZ
AWIPS ID: CAPTWC
NWWS sequence: nwws_processor.1765
WMO heading: XOUS55
WMO data type: CAP alert message XML (XO)
WMO geography: United States (US)
WMO bulletin number: 55

References

Identifier: urn:oid:2.49.0.1.840.0.65392289b35423c6bddecd9e6bb87ea750b347ed.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-17 00:52:00 UTC

English

Event codes

Name	Value
SAME	FFW
NationalWeatherService	FFW

Parameters

Name	Value
AWIPSidentifier	FFSTWC
WMOidentifier	WGUS75 KTWC 170110
NWSheadline	FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MST THIS EVENING FOR NORTHEASTERN PIMA COUNTY
flashFloodDetection	RADAR INDICATED
flashFloodDamageThreat	CONSIDERABLE
BLOCKCHANNEL	EAS
BLOCKCHANNEL	NWEM
EAS-ORG	WXR
VTEC	/O.CON.KTWC.FF.W.0225.000000T0000Z-260917T0345Z/
eventEndingTime	2026-09-16T20:45:00-07:00
WEAHandling	Imminent Threat
CMAMtext	NWS: FLASH FLOOD WARNING this area til 8:45 PM MST. Avoid flooded areas.
CMAMlongtext	National Weather Service: A FLASH FLOOD WARNING is in effect for this area until 8:45 PM MST. This is a dangerous and life-threatening situation. Do not attempt to travel unless you are fleeing an area subject to flooding or under an evacuation order.

Spanish

Event codes

Name	Value
SAME	FFW
NationalWeatherService	FFW

Parameters

Name	Value
AWIPSidentifier	FFSTWC
WMOidentifier	WGUS75 KTWC 170110
NWSheadline	FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MST THIS EVENING FOR NORTHEASTERN PIMA COUNTY
flashFloodDetection	RADAR INDICATED
flashFloodDamageThreat	CONSIDERABLE
BLOCKCHANNEL	EAS
BLOCKCHANNEL	NWEM
EAS-ORG	WXR
VTEC	/O.CON.KTWC.FF.W.0225.000000T0000Z-260917T0345Z/
eventEndingTime	2026-09-16T20:45:00-07:00
WEAHandling	Imminent Threat
CMAMtext	SNM: AVISO DE INUNDACIONES REPENTINAS hasta 8:45 PM MST. Evite areas inundadas.
CMAMlongtext	Servicio Nacional de Meteorologia: AVISO DE INUNDACIONES REPENTINAS en efecto para esta area hasta las 8:45 PM MST. Esta es una situacion peligrosa y amenaza la vida. No intente viajar a menos que sea para abandonar un area propensa a inundaciones o bajo una orden de desalojo.

Locations

English

Location data

Pima County, AZ

Name	Value
SAME	004019
UGC	AZC019

Polygons: 32.0,-111.2 31.99,-111.14 32.31,-110.91 32.48,-111.1 32.41,-111.2 32.07,-111.17 32.01,-111.2 32.0,-111.19 32.0,-111.2

Spanish

Location data

Pima County, AZ

Name	Value
SAME	004019
UGC	AZC019

Polygons: 32.0,-111.2 31.99,-111.14 32.31,-110.91 32.48,-111.1 32.41,-111.2 32.07,-111.17 32.01,-111.2 32.0,-111.19 32.0,-111.2