NOAA NWS / Event history
Flood Watch issued October 20 at 12:37AM MST until October 22 at 11:00PM MST by NWS Flagstaff AZ
Flood Watch · 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. Severe; possible; urgency: future.
- Bulletin issued
- 20 October 2026 at 07:37 UTC
- First saved by us
- 20 October 2026 at 07:47 UTC
- Last included in a daily record
- 20 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
- Source classification
- Severe · Source alert
A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.
- Issuer / area
- 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
- Certainty / urgency
- Possible / Future
- Message expiry (not hazard end)
- 21 October 2026 at 13:00 UTC
- Forecast onset / end
- 21 October 2026 at 12:00 UTC / 23 October 2026 at 06:00 UTC
Archived official description
* 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 in this archived message
Have a way to receive Flash Flood Warnings and be prepared to take action should warnings be issued.
The saved record
What changed
0 updates · 1 first record
Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.
First saved record · 20 October 2026 at 07:47 UTC
Saved by us
Starting point
First saved record
Our first saved version of Flood Watch issued October 20 at 12:37AM MST until October 22 at 11:00PM MST by NWS Flagstaff AZ. We have no earlier saved version to compare.
Bulletin issued: 20 October 2026 at 07:37 UTC
View saved version 1
Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.
{ "id": "nws:9340390d7d83b6a33ea3d1af", "authorityId": "urn:oid:2.49.0.1.840.0.a49f2701253648ae1f1419957046785dbff77a4e.001.1", "sender": "w-nws.webmaster@noaa.gov", "references": [], "category": "weather", "title": "Flood Watch issued October 20 at 12:37AM MST until October 22 at 11:00PM MST by NWS Flagstaff AZ", "eventType": "Flood Watch", "occurredAt": "2026-10-20T07:37:00.000Z", "issuedAt": "2026-10-20T07:37:00.000Z", "timeBasis": "Bulletin issued", "effectiveAt": "2026-10-20T07:37:00.000Z", "onsetAt": "2026-10-21T12:00:00.000Z", "expiresAt": "2026-10-21T13:00:00.000Z", "forecastEndAt": "2026-10-23T06:00:00.000Z", "severity": "Severe", "urgency": "Future", "certainty": "Possible", "messageType": "Alert", "status": "Source alert", "place": "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", "coordinates": null, "issuer": "NWS Flagstaff AZ", "summary": "Flood Watch · 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. Severe; possible; urgency: future.", "description": "* WHAT...Flash flooding caused by excessive rainfall is possible.\n\n* WHERE...All of northern and central Arizona.\n\n* WHEN...From late tonight through Thursday evening.\n\n* IMPACTS...Flash flooding will be possible in creeks, normally dry\nwashes, swimming holes, and over recently burned areas. Low-water\ncrossings may be flooded.\n\n* ADDITIONAL DETAILS...\n- An upper-level trough will bring a deep surge of subtropical and\ntropical moisture into our region. Showers and thunderstorms will\ndevelop across much of northern and central Arizona early\nWednesday morning and continue through Thursday evening. Stronger\nthunderstorms will bring threats of Flash Flooding, while more\nprolonged rainfall could lead to elevated flow in streams,\nrivers, and washes.\n- Additional information is available at weather.gov/flagstaff.", "instruction": "Have a way to receive Flash Flood Warnings and be prepared to take\naction should warnings be issued.", "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a49f2701253648ae1f1419957046785dbff77a4e.001.1", "source": "nws", "sourceName": "NOAA NWS" }Visit the external source ↗The external page may have changed since this version was saved.