Alert archive / Arizona / Flash Flood Warnings in 2026
Flash Flood Warning 126, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 19, 2026, 6:56 PM MST for Coconino 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 19, 2026, 6:56 PM MST (01:56 UTC)
- Expired
- Aug 19, 2026, 11:00 PM MST
- In force
- 4 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Coconino County, AZ, Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 113 km from the middle of the area, began a volume at 01:59 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
Phoenix, AZ (KPSR), launched 00:00Z, 1.9 hours before the alert went out and 200 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
- 1221 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 2679 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 6:40 PM MST | Flash Flood Warning | FGZ | Gila, Yavapai | 3 hr |
| Aug 19, 7:02 PM MST | Areal Flood Advisory | FGZ | Apache, Navajo | 3 hr |
| Aug 19, 7:05 PM MST | Special Weather Statement | FGZ | 25 min | |
| Aug 20, 12:39 PM MST | Special Weather Statement | FGZ | 36 min | |
| Aug 20, 12:49 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 26 min |
| Aug 20, 2:38 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 37 min |
| Aug 20, 3:30 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 31 min |
| Aug 20, 3:56 PM MST | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
| Aug 20, 4:05 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 25 min |
| Aug 20, 4:29 PM MST | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2026Every flash flood warning in 2026
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.