Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 182, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 16, 2021, 1:33 AM MST for La Paz County, Maricopa County, Arizona. It was in force for 6 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 16, 2021, 1:33 AM MST (08:33 UTC)
- Expired
- Aug 16, 2021, 7:30 AM MST
- In force
- 6 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties La Paz County, AZ, Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 182 km from the middle of the area, began a volume at 08:36 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 00:00Z, 8.6 hours before the alert went out and 150 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
- 1548 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 2123 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
067
WGUS55 KPSR 160833
FFWPSR
AZC012-013-161430-
/O.NEW.KPSR.FF.W.0182.210816T0833Z-210816T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
133 AM MST Mon Aug 16 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Maricopa County in south central Arizona...
Northeastern La Paz County in west central Arizona...
* Until 730 AM MST.
* At 133 AM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1 inch of rain
has 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 creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Wenden, Salome, Gladden, Harcuvar, Vicksburg, Vicksburg Junction,
Aguila, Alamo Lake State Park and Bouse.
This includes the following highways...
AZ Route 72 between mile markers 27 and 36.
US Highway 60 between mile markers 100 and 103...and
between mile markers 39 and 44.
This includes the following streams and drainages...
Browns Canyon Wash, Powerline Wash, Alamo Wash, Date Creek,
Calcite Wash, Bullard Wash, Tiger Wash, Pump Mine Wash, Sols Wash,
Cunningham Wash, Jackrabbit Wash, Bouse Wash, Bill Williams River,
Centennial Wash, Grass Wash, Santa Maria River, Salome Wash and
Dead Horse Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3431 11352 3429 11337 3432 11333 3400 11333
3400 11281 3378 11300 3367 11325 3362 11343
3366 11386 3386 11404 3399 11398
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Hirsch2 follow-up statements
256
WGUS75 KPSR 160949
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
249 AM MST Mon Aug 16 2021
AZC012-013-161430-
/O.CON.KPSR.FF.W.0182.000000T0000Z-210816T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-Maricopa AZ-
249 AM MST Mon Aug 16 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM MST THIS
MORNING FOR MARICOPA AND NORTHEASTERN LA PAZ COUNTIES...
At 249 AM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 1 inch of rain has
fallen. Additional rainfall amounts up 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 creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Wenden, Salome, Gladden, Harcuvar, Vicksburg, Vicksburg Junction,
Aguila, Alamo Lake State Park and Bouse.
This includes the following highways...
AZ Route 72 between mile markers 27 and 36.
US Highway 60 between mile markers 100 and 103...and
between mile markers 39 and 44.
This includes the following streams and drainages...
Browns Canyon Wash, Powerline Wash, Alamo Wash, Date Creek,
Calcite Wash, Bullard Wash, Tiger Wash, Pump Mine Wash, Sols Wash,
Cunningham Wash, Jackrabbit Wash, Bouse Wash, Bill Williams River,
Centennial Wash, Grass Wash, Santa Maria River, Salome Wash and
Dead Horse Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3431 11352 3429 11337 3432 11333 3400 11333
3400 11281 3378 11300 3367 11325 3362 11343
3366 11386 3386 11404 3399 11398
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Hirsch614
WGUS75 KPSR 161437
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
737 AM MST Mon Aug 16 2021
AZC012-013-161447-
/O.EXP.KPSR.FF.W.0182.000000T0000Z-210816T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-Maricopa AZ-
737 AM MST Mon Aug 16 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR MARICOPA AND NORTHEASTERN LA
PAZ COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 200 AM MST Tuesday for a
portion of south central Arizona.
LAT...LON 3431 11352 3429 11337 3432 11333 3400 11333
3400 11281 3378 11300 3367 11325 3362 11343
3366 11386 3386 11404 3399 11398
$$
INSThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:49 PM MST | Special Weather Statement | PSR | Gila | 56 min |
| Aug 15, 8:26 PM MST | Severe Thunderstorm Warning | PSR | Gila | 49 min |
| Aug 15, 9:14 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 46 min |
| Aug 15, 9:18 PM MST | Special Weather Statement | PSR | Gila | 42 min |
| Aug 15, 9:58 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa, Pinal | 47 min |
| Aug 15, 10:14 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Aug 15, 10:31 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 44 min |
| Aug 15, 10:45 PM MST | Special Weather Statement | PSR | Pinal | 45 min |
| Aug 15, 10:50 PM MST | Flash Flood Warning | PSR | Gila, Maricopa, Pinal | 6 hr |
| Aug 15, 10:55 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 65 min |
| Aug 15, 10:58 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Aug 15, 11:14 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 46 min |
| Aug 15, 11:31 PM MST | Special Weather Statement | PSR | Maricopa | 44 min |
| Aug 15, 11:37 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 38 min |
| Aug 15, 11:44 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 32 min |
| Aug 15, 11:45 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 16, 12:18 AM MST | Special Weather Statement | PSR | 42 min | |
| Aug 16, 12:49 AM MST | Severe Thunderstorm Warning | PSR | La Paz, Maricopa | 56 min |
| Aug 16, 1:47 AM MST | Special Weather Statement | PSR | La Paz | 58 min |
| Aug 16, 1:54 AM MST | Severe Thunderstorm Warning | PSR | La Paz | 66 min |
| Aug 16, 2:22 AM MST | Special Weather Statement | PSR | La Paz | 68 min |
| Aug 16, 2:53 AM MST | Flash Flood Warning | PSR | La Paz | 5 hr |
| Aug 16, 3:08 AM MST | Dust Storm Advisory | PSR | La Paz, Yuma | 2 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.