Alert archive / Arizona / Flash Flood Warnings in 2025
Flash Flood Warning 18, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 14, 2025, 5:17 PM MST for Coconino County, Gila County, Arizona. It was in force for 3 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 14, 2025, 5:17 PM MST (00:17 UTC)
- Expired
- Aug 14, 2025, 8:09 PM MST
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Coconino County, AZ, Gila County, AZ
The radar
The Flagstaff radar (KFSX), 29 km from the middle of the area, began a volume at 00:20 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 0.3 hours before the alert went out and 297 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3265 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 14, 4:40 PM MST, 37 minutes earlier.
Area forecast discussion, Aug 14, 4:40 PM MST, 37 minutes before
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Special weather statement, Aug 14, 12:40 PM MST, 4 hours 37 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
1240 PM MST Thu Aug 14 2025
AZZ008-037-142015-
Yavapai County Valleys and Basins AZ-Yavapai County Mountains AZ-
1240 PM MST Thu Aug 14 2025
...A STRONG THUNDERSTORM IMPACTING YAVAPAI COUNTY NEAR LOVE FIELD
AIRPORT UNTIL 115 PM MST...
At 1240 PM MST, Doppler radar was tracking a strong thunderstorm
over Prescott Regional Airport, or 6 miles northwest of Prescott
Valley, moving northeast at 5 mph.
HAZARD...Wind gusts up to 40 mph and penny 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...
Chino Valley, Prescott, Prescott Valley, Prescott Regional
Airport, Embry-Riddle Aeronautical University, Willow Creek
Reservoir, Watson Lake and Williamson Valley.
This includes the following highways...
State Route 89 between mile markers 316 and 327.
State Route 89A between mile markers 318 and 324.
This includes the following recreation areas and campgrounds...
Watson Lake Park.
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 3469 11249 3479 11243 3467 11227 3457 11241
3464 11252
TIME...MOT...LOC 1939Z 220DEG 3KT 3464 11243
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
RRSpecial weather statement, Aug 14, 1:42 PM MST, 3 hours 35 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
142 PM MST Thu Aug 14 2025
AZZ008-037-038-142115-
Yavapai County Valleys and Basins AZ-Oak Creek and Sycamore
Canyons AZ-Yavapai County Mountains AZ-
142 PM MST Thu Aug 14 2025
...A STRONG THUNDERSTORM IMPACTING STATE HIGHWAY 89A WEST OF
CLARKDALE UNTIL 215 PM MST...
At 142 PM MST, Doppler radar was tracking a strong thunderstorm over
Jerome State Historic Park, or 17 miles northeast of Prescott
Valley, moving north at 5 mph. This storm will cause hazardous
driving conditions along State Highway 89A.
HAZARD...Wind gusts up to 40 mph and half inch 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...
Clarkdale, Jerome State Historic Park, Woodchute Mountain,
Cottonwood Airport, Cottonwood, Verde Village, Jerome, Mingus
Mountain, Tuzigoot National Monument and Dead Horse Ranch State
Park.
This includes State Route 89A between mile markers 332 and 352.
This includes the following recreation areas and campgrounds...
Potato Patch Campground, Playground Group Campground, Potato Patch
Campground, Red-Tail Hawk Loop Campground, Quail Loop Campground,
Raven Loop Campground, Blackhawk Loop Campground and Cooper's Hawk
Loop Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3473 11230 3489 11221 3484 11195 3464 11209
3471 11231
TIME...MOT...LOC 2039Z 199DEG 4KT 3476 11211
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
RRSpecial weather statement, Aug 14, 3:04 PM MST, 2 hours 13 minutes before
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<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
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</p>
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</html>The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 6:52 PM MST | Flash Flood Warning | FGZ | Gila, Yavapai | 3 hr |
| Aug 14, 9:33 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 27 min |
| Aug 14, 10:30 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 hr |
| Aug 15, 2:05 PM MST | Special Weather Statement | FGZ | 25 min | |
| Aug 15, 2:53 PM MST | Special Weather Statement | FGZ | 37 min | |
| Aug 15, 3:05 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 25 min |
| Aug 15, 3:31 PM MST | Areal Flood Advisory | FGZ | Coconino, Yavapai | 3 hr |
| Aug 15, 3:58 PM MST | Special Weather Statement | FGZ | 32 min | |
| Aug 15, 4:10 PM MST | Special Weather Statement | FGZ | Coconino | 35 min |
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; radar from the NEXRAD Level II archive.