Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 151, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 9, 2021, 2:27 PM MST for Yavapai County, Arizona. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2021, 2:27 PM MST (21:27 UTC)
- Expired
- Aug 9, 2021, 4:30 PM MST
- In force
- 2 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 147 km from the middle of the area, began a volume at 21:28 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.5 hours before the alert went out and 86 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
- 2142 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
623
WGUS55 KFGZ 092127
FFWFGZ
AZC025-092330-
/O.NEW.KFGZ.FF.W.0151.210809T2127Z-210809T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
227 PM MST Mon Aug 9 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Yavapai County in west central Arizona...
* Until 430 PM MST.
* At 226 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 0.25 to 0.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Walnut Creek Ranger Station.
This includes the following streams and drainages...
Mud Tank Wash, Indian Springs Wash, Antelope Wash, Apache Creek,
Pine Creek, Williamson Valley Wash, Round Valley Wash, Graver
Wash, Quartz Lead Wash, Big Chino Wash and Walnut Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3514 11279 3510 11271 3497 11256 3490 11258
3489 11286
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TPS2 follow-up statements
405
WGUS75 KFGZ 092238
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
338 PM MST Mon Aug 9 2021
AZC025-092330-
/O.CON.KFGZ.FF.W.0151.000000T0000Z-210809T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
338 PM MST Mon Aug 9 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 337 PM MST, Doppler radar indicated thunderstorms producing heavy
rain have ended in portions of northern Yavapai County. Between 1
and 2 inches of rain have fallen. Additional light rainfall amounts
up to 0.25 inches are possible. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Walnut Creek Ranger Station.
This includes the following streams and drainages...
Mud Tank Wash, Indian Springs Wash, Antelope Wash, Apache Creek,
Pine Creek, Williamson Valley Wash, Round Valley Wash, Graver
Wash, Quartz Lead Wash, Big Chino Wash and Walnut Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3514 11279 3510 11271 3497 11256 3490 11258
3489 11286
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TPS342
WGUS75 KFGZ 092323
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
423 PM MST Mon Aug 9 2021
AZC025-092333-
/O.EXP.KFGZ.FF.W.0151.000000T0000Z-210809T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
423 PM MST Mon Aug 9 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 430 PM MST THIS AFTERNOON FOR
YAVAPAI COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3514 11279 3510 11271 3497 11256 3490 11258
3489 11286
$$
MCTThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 5:16 PM MST | Special Weather Statement | FGZ | 44 min | |
| Aug 9, 12:30 PM MST | Special Weather Statement | FGZ | Yavapai | 30 min |
| Aug 9, 2:39 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 9, 3:42 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 9, 3:53 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 9, 4:15 PM MST | Special Weather Statement | FGZ | 30 min | |
| Aug 9, 4:21 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 24 min |
| Aug 9, 4:42 PM MST | Flash Flood Warning | FGZ | Coconino, Gila | 3 hr |
| Aug 9, 4:51 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2021Every flash flood warning in 2021
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.