Severe Flood ● Closed
Flash Flood Warning issued September 12 at 12:52PM MST until September 12 at 3:45PM MST by NWS Tucson AZ, United States of America
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
FFWTWC
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Northeastern Pima County in southeastern Arizona...
* Until 345 PM MST.
* At 1252 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area which extends from the Catalina
Foothills into Casas Adobes and Oro Valley. Between 0.5 and 1.5
inches of rain have fallen. 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...
Catalina, Oro Valley, Marana, Casas Adobes, Flowing Wells, Tanque
Verde, Tortolita, Catalina State Park, Catalina Foothills, Sabino
Canyon Recreation Area and Seven Falls.
This includes the following highways...
Route 77 between mile markers 71 and 87. Interstate 10 between mile
markers 243 and 253.
This includes the following Flash Flood Prone Locations...
Silverbell Rd near Ina Rd, Camino De La Tierra at the Rillito River,
Limberlost Rd from Soilder Trail to Homestead Ave, Overton Rd at
Canada del Oro, Snyder Rd from Kolb Rd to Sabino Canyon Rd, Sunset Rd
west of Camino de Oeste and E Wilds Rd at the Canada del Oro.
This includes the following streams and drainages...
Agua Caliente Wash, Bird Canyon, Esperero Wash, Ventana Canyon
Wash, Sutherland Wash, Santa Cruz River, Oro, Caada del, Rillito
River, Tanque Verde Wash, Sabino Creek, Chirreon Wash, Indian Well
Wash, Big Wash, Pantano Wash and Chalk Creek.
Measurements
| Coordinates | 32.3691, -110.8900 |
|---|---|
| Region | Pima, AZ |
| Location Precision | polygon |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Immediate |
| Cap Certainty | Likely |
| Cap Expires | 2026-09-12T15:45:00-07:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportAlso reported by: NWS NWS NWS
This event as JSON · API and licence
Source updated 37 days ago (Sep 12, 2026 19:53 UTC) · we last heard from WMO Alert Hub (national weather services) 4 seconds ago
On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.
Satellite view, before and after
The latest clear Sentinel-2 pass before this event and the earliest one after it.
10 Sep 2026, 2 days before this event. 1.1% cloud across the tile.
20 Sep 2026, 8 days after this event. 23.1% cloud across the tile.
The white ring marks where the event was reported.
Each image is a preview of a whole Sentinel-2 tile — an area of roughly 110 by 110 km, where one pixel is about 320 metres — not a close-up of the event, which may be a small part of it. "Clear" means under 30% cloud across the entire tile, so the exact place that matters can still be hidden. These are pictures for context, not an assessment of damage.
Contains modified Copernicus Sentinel data 2026, found through the Earth Search catalogue (Element 84) and served from the AWS Open Data Sentinel-2 archive.
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Flood preparation, evacuation decisions, and the dangers of driving or walking through floodwater.
Open Flood Safety Guide →Earlier flood events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.