Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 65, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 21, 2021, 12:13 PM MST for Yavapai County, Arizona. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2021, 12:13 PM MST (19:13 UTC)
- Expired
- Jul 21, 2021, 1:09 PM MST
- In force
- 56 min
- 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), 94 km from the middle of the area, began a volume at 19:15 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, 7.2 hours before the alert went out and 64 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.
810
WGUS55 KFGZ 211913
FFWFGZ
AZC025-212215-
/O.NEW.KFGZ.FF.W.0065.210721T1913Z-210721T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
1213 PM 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 315 PM MST.
* At 1213 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.5 inches of
rain have fallen. Additional rainfall amounts of 0.5 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.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Potato Patch Campground and Playground Group Campground.
This includes the following highways...
State Route 89A between mile markers 330 and 343.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain.
Normally dry washes, slot canyons and creeks can become raging
killer currents in a matter of minutes, even from distant rainfall.
&&
LAT...LON 3480 11227 3483 11216 3471 11209 3465 11222
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EL2 follow-up statements
834
WGUS75 KFGZ 211939
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
1239 PM MST Wed Jul 21 2021
AZC025-212215-
/O.CON.KFGZ.FF.W.0065.000000T0000Z-210721T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
1239 PM MST Wed Jul 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM MST THIS
AFTERNOON FOR YAVAPAI COUNTY...
At 1237 PM MST, Doppler radar indicated the rainfall intensity has
decreased across the warned area, however light to moderate rain is
still taking place with flooding likely as water drains. Between 1
and 2 inches of rain have fallen. Additional rainfall amounts of
0.25 to 0.5 inches are possible in the warned area.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Potato Patch Campground and Playground Group Campground.
This includes the following highways...
State Route 89A between mile markers 331 and 344.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain.
Normally dry washes, slot canyons and creeks can become raging
killer currents in a matter of minutes, even from distant rainfall.
&&
LAT...LON 3480 11227 3483 11216 3471 11209 3465 11222
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
EL383 WGUS75 KFGZ 212009 FFSFGZ Flash Flood Statement National Weather Service Flagstaff AZ 109 PM MST Wed Jul 21 2021 AZC025-212019- /O.CAN.KFGZ.FF.W.0065.000000T0000Z-210721T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Yavapai AZ- 109 PM MST Wed Jul 21 2021 ...FLASH FLOOD WARNING IS CANCELLED NEAR PONDEROSA PARK IN 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 3480 11227 3483 11216 3471 11209 3465 11222 $$ 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, 10:48 AM MST | Flash Flood Warning | FGZ | Yavapai | 2 hr |
| Jul 21, 12:03 PM MST | Special Weather Statement | FGZ | Yavapai | 42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.