Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 218, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 29, 2021, 2:25 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 29, 2021, 2:25 PM MST (21:25 UTC)
- Expired
- Aug 29, 2021, 4:31 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 Phoenix radar (KIWA), 143 km from the middle of the area, began a volume at 21:27 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 12:00Z, 9.4 hours before the alert went out and 113 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
- 122 J/kg
- Mixed-layer CIN
- -447 J/kg
- Mixed-layer LCL
- 2496 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
200
WGUS55 KFGZ 292125
FFWFGZ
AZC025-300030-
/O.NEW.KFGZ.FF.W.0218.210829T2125Z-210830T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
225 PM MST Sun Aug 29 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
The Tenderfoot Fire scar in...
Yavapai County in west central Arizona...
* Until 530 PM MST.
* At 224 PM MST, Doppler radar indicated thunderstorms producing
heavy rain over the Tenderfoot Fire scar. Between 0.50 and 1.00
inches of rain have fallen. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding in and around the Tenderfoot
Fire scar.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of areas in and around
the Tenderfoot Fire scar.
* Some locations that will experience flash flooding include...
Yarnell and Glen Ilah.
This includes the following highways...
State Route 89 between mile markers 277 and 278.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall over the Tenderfoot Fire scar will flood
neighborhoods next to the scar and highway 89A south of Yarnell.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3421 11276 3422 11276 3423 11274 3423 11272
3421 11274 3421 11275
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
McCollum1 follow-up statement
832
WGUS75 KFGZ 292331
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
431 PM MST Sun Aug 29 2021
AZC025-292341-
/O.CAN.KFGZ.FF.W.0218.000000T0000Z-210830T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
431 PM MST Sun Aug 29 2021
...FLASH FLOOD WARNING FOR THE TENDERFOOT FIRE SCAR IS CANCELLED FOR
YAVAPAI COUNTY...
At 430 PM MST, National Weather Service Flagstaff Doppler radar
indicated that rainfall had ended in the Yarnell area. No reports of
Flash Flooding have been received and the Flash Flood Warning is
cancelled. Area creeks and streams may still have higher than normal
flow for the remainder of the afternoon.
Please continue to heed remaining road closures.
LAT...LON 3421 11276 3422 11276 3423 11274 3423 11272
3421 11274 3421 11275
$$
PetersonThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:15 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 45 min |
| Aug 28, 6:39 PM MST | Flash Flood Warning | FGZ | Yavapai | 111 min |
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.