Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 152, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 9, 2021, 2:39 PM MST for Yavapai County, Arizona. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 9, 2021, 2:39 PM MST (21:39 UTC)
- Expired
- Aug 9, 2021, 5:45 PM MST
- In force
- 3 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), 118 km from the middle of the area, began a volume at 21:38 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 4:05 PM MST | FLASH FLOOD | 1 Ne Walker, AZ | TRAINED SPOTTER REPORTED LYNX CREEK IN WALKER WAS RUNNING 4-5 FT DEEP IN SPOTS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.7 hours before the alert went out and 101 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.
189
WGUS55 KFGZ 092139
FFWFGZ
AZC025-100045-
/O.NEW.KFGZ.FF.W.0152.210809T2139Z-210810T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
239 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 545 PM MST.
* At 237 PM MST, Doppler radar indicated thunderstorms producing
heavy rain southwest of Prescott to Walker. Between 0.5 and 1.5
inches of rain have fallen. Additional rainfall amounts of 0.75 to
1.5 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...
Prescott, Ponderosa Park, Oak Knoll Village, Groom Creek
Subdivision, Walker, White Spar Campground, Lower Wolf Creek
Campground and Upper Wolf Creek Group Campground.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 69 near mile marker 296.
State Route 89 between mile markers 303 and 312.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
&&
LAT...LON 3460 11253 3447 11233 3437 11242 3454 11261
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TPS3 follow-up statements
717
WGUS75 KFGZ 092247
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
347 PM MST Mon Aug 9 2021
AZC025-100045-
/O.CON.KFGZ.FF.W.0152.000000T0000Z-210810T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
347 PM MST Mon Aug 9 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 345 PM MST, Doppler radar indicated thunderstorms producing heavy
rain have ended from Iron Springs southeast to Walker. Between 1 and
2 inches of rain have fallen. Additional rainfall amounts up to 0.25
inches are possible. Flash flooding will remain a concern over the
next couple hours due to runoff from the heavy rainfall.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Prescott, Ponderosa Park, Oak Knoll Village, Groom Creek
Subdivision, Walker, White Spar Campground, Lower Wolf Creek
Campground and Upper Wolf Creek Group Campground.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 89 between mile markers 303 and 312.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
&&
LAT...LON 3460 11253 3447 11233 3437 11242 3454 11261
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TPS009
WGUS75 KFGZ 092357
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
457 PM MST Mon Aug 9 2021
AZC025-100045-
/O.CON.KFGZ.FF.W.0152.000000T0000Z-210810T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
457 PM MST Mon Aug 9 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 455 PM MST, Doppler radar indicated heavy rain has moved out of
the warned area. Between 1 and 2 inches of rain have fallen. 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...
Prescott, Ponderosa Park, Oak Knoll Village, Groom Creek
Subdivision, Indian Hill West Prescott, Downtown Prescott, Walker,
White Spar Campground, Lower Wolf Creek Campground and Upper Wolf
Creek Group Campground.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 89 between mile markers 303 and 312.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
&&
LAT...LON 3460 11253 3447 11233 3437 11242 3454 11261
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MCT673 WGUS75 KFGZ 100038 FFSFGZ Flash Flood Statement National Weather Service Flagstaff AZ 538 PM MST Mon Aug 9 2021 AZC025-100048- /O.EXP.KFGZ.FF.W.0152.000000T0000Z-210810T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Yavapai AZ- 538 PM MST Mon Aug 9 2021 ...FLASH FLOOD WARNING WILL EXPIRE AT 545 PM MST THIS AFTERNOON FOR YAVAPAI COUNTY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures and use caution near any high water. LAT...LON 3460 11253 3447 11233 3437 11242 3454 11261 $$ MCT
The 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, 2:27 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.