Vigie · Flood Watch issued October 20 at 12:37AM MST until October 22 at 11:00PM MST by NWS Flagstaff AZ · Kaibab Plateau; Marble and Glen Canyons; Grand Canyon Country; Coconino Plateau; Yavapai County Mountains; Northeast Plateaus and Mesas Hwy 264 Northward; Chinle Valley; Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Coconino County; Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County; Western Mogollon Rim; Eastern Mogollon Rim; White Mountains; Northern Gila County; Yavapai County Valleys and Basins; Oak Creek and Sycamore Canyons; Black Mesa Area; Northeast Plateaus and Mesas South of Hwy 264

Issued by: NWS Flagstaff AZ
Start: 2026-10-21 12:00 UTC
Expected end: 2026-10-23 06:00 UTC
Message valid until: 2026-10-21 13:00 UTC
Sent: 2026-10-20 07:37 UTC
Original level: Severe
On the map: Not placed: area given as codes with no licensed shape

Official text, unchanged (en-US)

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...All of northern and central Arizona. * WHEN...From late tonight through Thursday evening. * IMPACTS...Flash flooding will be possible in creeks, normally dry washes, swimming holes, and over recently burned areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - An upper-level trough will bring a deep surge of subtropical and tropical moisture into our region. Showers and thunderstorms will develop across much of northern and central Arizona early Wednesday morning and continue through Thursday evening. Stronger thunderstorms will bring threats of Flash Flooding, while more prolonged rainfall could lead to elevated flow in streams, rivers, and washes. - Additional information is available at weather.gov/flagstaff.

Instructions

Have a way to receive Flash Flood Warnings and be prepared to take action should warnings be issued.

CAP message

Source: NOAA National Weather Service (https://api.weather.gov). Not endorsed by NOAA or the NWS | Issued by NWS Flagstaff AZ

The level and phenomenon shown are derived by Vigie; the text and the original level are the issuer's.