Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 64, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 21, 2021, 10:48 AM MST for Yavapai County, Arizona. It was in force for 2 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
- Jul 21, 2021, 10:48 AM MST (17:48 UTC)
- Expired
- Jul 21, 2021, 1:10 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), 118 km from the middle of the area, began a volume at 17:51 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 |
|---|---|---|---|
| Jul 21, 12:30 PM MST | FLASH FLOOD | 2 E Ponderosa Park, AZ | WATER OVER THE ROAD AT STAGECOACH WHERE IT CROSSES GROOM CREEK. ESTIMATED 2 FT DEEP. |
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, 5.8 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
- 77 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 1785 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
607
WGUS55 KFGZ 211748
FFWFGZ
AZC025-212100-
/O.NEW.KFGZ.FF.W.0064.210721T1748Z-210721T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
1048 AM MST Wed Jul 21 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Yavapai County in west central Arizona...
* Until 200 PM MST.
* At 1048 AM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
0.5 and 1 inch of rain has fallen. Additional rainfall amounts of
0.75 to 1 inch 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 and automated gauges.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Prescott, Prescott Valley, Oak Knoll Village, Downtown Prescott,
Indian Hill West Prescott, Ponderosa Park, Groom Creek
Subdivision, Prescott Gateway Mall, White Spar Campground, Lower
Wolf Creek Campground, Upper Wolf Creek Group Campground and Lynx
Lake Dam.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 69 between mile markers 293 and 296.
State Route 89 between mile markers 300 and 316.
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 3454 11258 3460 11242 3448 11234 3442 11253
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EL4 follow-up statements
058
WGUS75 KFGZ 211814
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
1114 AM MST Wed Jul 21 2021
AZC025-212100-
/O.CON.KFGZ.FF.W.0064.000000T0000Z-210721T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
1114 AM MST Wed Jul 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 1112 AM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. The
heaviest rainfall has shifted a few miles southeast of Ponderosa
Park. Between 0.75 and 1.5 inches of rain have fallen. Additional
rainfall amounts of 0.75 to 1 inch are possible in the warned area.
Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Prescott, Prescott Valley, Oak Knoll Village, Downtown Prescott,
Indian Hill West Prescott, Ponderosa Park, Groom Creek
Subdivision, Prescott Gateway Mall, White Spar Campground, Lower
Wolf Creek Campground, Upper Wolf Creek Group Campground and Lynx
Lake Dam.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 69 between mile markers 293 and 296.
State Route 89 between mile markers 300 and 316.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
&&
LAT...LON 3454 11258 3460 11242 3448 11234 3442 11253
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EL996
WGUS75 KFGZ 211856
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
1156 AM MST Wed Jul 21 2021
AZC025-212100-
/O.CON.KFGZ.FF.W.0064.000000T0000Z-210721T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
1156 AM MST Wed Jul 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 1152 AM MST, the rainfall intensity has begun to decrease in the
warned area with the heaviest rain remaining a few miles
east-southeast of Ponderosa Park. Between 1 and 2.25 inches of rain
have fallen, according to multiple Yavapai County automatic rain
gauges. Additional rainfall amounts of 0.25 to 0.75 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 and automated gauges.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Prescott, Prescott Valley, Oak Knoll Village, Downtown Prescott,
Indian Hill West Prescott, Ponderosa Park, Groom Creek
Subdivision, Prescott Gateway Mall, White Spar Campground, Lower
Wolf Creek Campground, Upper Wolf Creek Group Campground and Lynx
Lake Dam.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 69 between mile markers 293 and 296.
State Route 89 between mile markers 300 and 316.
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 3454 11258 3460 11242 3448 11234 3442 11253
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EL947
WGUS75 KFGZ 211924
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
1224 PM MST Wed Jul 21 2021
AZC025-212100-
/O.CON.KFGZ.FF.W.0064.000000T0000Z-210721T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
1224 PM MST Wed Jul 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 1222 PM MST, Doppler radar indicated the heavy rainfall has ended
across the warned area, however flooding is expected to continue
being an issue as water drains. Between 1 and 2 inches of rain have
fallen.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Prescott, Prescott Valley, Oak Knoll Village, Downtown Prescott,
Indian Hill West Prescott, Ponderosa Park, Groom Creek
Subdivision, Prescott Gateway Mall, White Spar Campground, Lower
Wolf Creek Campground, Upper Wolf Creek Group Campground and Lynx
Lake Dam.
This includes the following swimming holes...
Wolf Creek Falls.
This includes the following highways...
State Route 69 between mile markers 293 and 296.
State Route 89 between mile markers 300 and 316.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
&&
LAT...LON 3454 11258 3460 11242 3448 11234 3442 11253
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EL392 WGUS75 KFGZ 212010 FFSFGZ Flash Flood Statement National Weather Service Flagstaff AZ 110 PM MST Wed Jul 21 2021 AZC025-212020- /O.CAN.KFGZ.FF.W.0064.000000T0000Z-210721T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Yavapai AZ- 110 PM MST Wed Jul 21 2021 ...FLASH FLOOD WARNING IS CANCELLED NEAR PONDEROSA PARK IN 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 3454 11258 3460 11242 3448 11234 3442 11253 $$ EL
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 6:16 PM MST | Special Weather Statement | FGZ | 29 min | |
| Jul 20, 7:32 PM MST | Severe Thunderstorm Warning | FGZ | Navajo | 28 min |
| Jul 20, 7:55 PM MST | Flash Flood Warning | FGZ | Navajo | 2 hr |
| Jul 20, 8:33 PM MST | Flash Flood Warning | FGZ | Navajo | 117 min |
| Jul 21, 12:17 AM MST | Flash Flood Warning | FGZ | Gila | 118 min |
| Jul 21, 2:38 AM MST | Flash Flood Watch | FGZ | Apache, Coconino, Gila, Navajo, Yavapai | 5 days |
| Jul 21, 10:19 AM MST | Special Weather Statement | FGZ | Yavapai | 26 min |
| Jul 21, 12:03 PM MST | Special Weather Statement | FGZ | Yavapai | 42 min |
| Jul 21, 12:13 PM MST | Flash Flood Warning | FGZ | Yavapai | 56 min |
| Jul 21, 12:20 PM MST | Flash Flood Warning | FGZ | Yavapai | 114 min |
| Jul 21, 12:35 PM MST | Special Weather Statement | FGZ | 40 min | |
| Jul 21, 12:47 PM MST | Flash Flood Warning | FGZ | Coconino | 118 min |
| Jul 21, 12:54 PM MST | Special Weather Statement | FGZ | 36 min | |
| Jul 21, 1:06 PM MST | Flash Flood Warning | FGZ | Coconino | 92 min |
| Jul 21, 1:24 PM MST | Flash Flood Warning | FGZ | Coconino | 110 min |
| Jul 21, 1:27 PM MST | Flash Flood Warning | FGZ | Yavapai | 74 min |
| Jul 21, 1:57 PM MST | Special Weather Statement | FGZ | Yavapai | 48 min |
| Jul 21, 2:01 PM MST | Areal Flood Advisory | FGZ | Yavapai | 119 min |
| Jul 21, 2:05 PM MST | Flash Flood Warning | FGZ | Coconino | 2 hr |
| Jul 21, 2:22 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Jul 21, 2:30 PM MST | Special Weather Statement | FGZ | 45 min | |
| Jul 21, 2:36 PM MST | Flash Flood Warning | FGZ | Yavapai | 54 min |
| Jul 21, 2:53 PM MST | Flash Flood Warning | FGZ | Coconino | 82 min |
| Jul 21, 2:57 PM MST | Flash Flood Warning | FGZ | Yavapai | 60 min |
| Jul 21, 2:59 PM MST | Flash Flood Warning | FGZ | Yavapai | 60 min |
| Jul 21, 3:21 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 26 min |
| Jul 21, 3:34 PM MST | Flash Flood Warning | FGZ | Coconino | 98 min |
| Jul 21, 3:49 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 21, 4:35 PM MST | Flash Flood Warning | FGZ | Coconino | 115 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.