Alert archive / Arizona / Flash Flood Warnings in 2025
Flash Flood Warning 34, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 26, 2025, 2:24 PM MST for Gila County, Yavapai County, Arizona. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 26, 2025, 2:24 PM MST (21:24 UTC)
- Expired
- Aug 26, 2025, 6:30 PM MST
- In force
- 4 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Gila County, AZ, Yavapai County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.4 hours before the alert went out and 115 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.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1305 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Flagstaff, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 26, 2:16 PM MST, 8 minutes earlier.
Area forecast discussion, Aug 26, 2:16 PM MST, 8 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>In the hours before
Local storm report, Aug 26, 9:49 AM MST, 4 hours 35 minutes before
Preliminary Local Storm Report
National Weather Service Flagstaff AZ
949 AM MST Tue Aug 26 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0815 PM Flash Flood 1 NNE Prescott Courthou 34.55N 112.46W
08/25/2025 Yavapai AZ Cocorahs
Post-event report from Monday night (8/25).
A USGS stream gage on Granite Creek (GCRA3)
measured a 4.6 foot rise in 30 minutes. A
CoCoRaHS observer upstream of the gage
confirmed water nearing a business parking
lot in downtown Prescott. The observer
measured 2.05 inches of rain.
&&
MCTSpecial weather statement, Aug 26, 11:23 AM MST, 3 hours 1 minute before
Special Weather Statement
National Weather Service Flagstaff AZ
1123 AM MST Tue Aug 26 2025
AZZ010-011-261900-
Chinle Valley AZ-Chuska Mountains and Defiance Plateau AZ-
1123 AM MST Tue Aug 26 2025 /1223 PM MDT Tue Aug 26 2025/
...A STRONG THUNDERSTORM WILL IMPACT AREAS TSAILE IN APACHE COUNTY
UNTIL NOON MST /1 PM MDT/...
At 1123 AM MST /1223 PM MDT/, Doppler radar was tracking a strong
thunderstorm 6 miles southwest of Wheatfields Lake, or 21 miles east
of Chinle, moving northeast at 15 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.
Locations impacted include...
Sehili, Wheatfields Lake, Sonsela Buttes, Canyon De Chelly
National Monument, Lower Wheatfields, Wheatfields, Upper
Wheatfields and Tsaile.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
Torrential rainfall is also occurring with this storm and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3617 10932 3636 10922 3629 10905 3617 10905
3608 10912
TIME...MOT...LOC 1823Z 208DEG 14KT 3616 10920
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
HumphreysThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 5:38 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 37 min |
| Aug 25, 6:36 PM MST | Special Weather Statement | FGZ | Yavapai | 24 min |
| Aug 25, 6:51 PM MST | Dust Storm Warning | FGZ | Yavapai | 24 min |
| Aug 25, 7:53 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 26, 11:23 AM MST | Special Weather Statement | FGZ | 37 min | |
| Aug 26, 11:46 AM MST | Severe Thunderstorm Warning | FGZ | Apache | 29 min |
| Aug 26, 12:29 PM MST | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 46 min |
| Aug 26, 1:43 PM MST | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 32 min |
| Aug 26, 2:01 PM MST | Flash Flood Warning | FGZ | Coconino | 4 hr |
| Aug 26, 2:12 PM MST | Flash Flood Warning | FGZ | Yavapai | 4 hr |
| Aug 26, 2:44 PM MST | Flash Flood Warning | FGZ | Coconino | 9 hr |
Nearby
Flash Flood Warnings in Arizona, 2025Every flash flood warning in 2025
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.