Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 229, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 30, 2021, 2:55 PM MST for La Paz County, Arizona. It was in force for 4 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 30, 2021, 2:55 PM MST (21:55 UTC)
- Expired
- Aug 30, 2021, 7:00 PM MST
- In force
- 4 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County La Paz County, AZ
The radar
The Yuma radar (KYUX), 155 km from the middle of the area, began a volume at 21:56 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, 9.9 hours before the alert went out and 200 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
- 126 J/kg
- Mixed-layer CIN
- -355 J/kg
- Mixed-layer LCL
- 2569 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
259
WGUS55 KPSR 302155
FFWPSR
AZC012-310200-
/O.NEW.KPSR.FF.W.0229.210830T2155Z-210831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
255 PM MST Mon Aug 30 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Central La Paz County in west central Arizona...
* Until 700 PM MST.
* At 255 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 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 creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Quartzsite and Bouse.
This includes the following highways...
AZ Route 72 between mile markers 26 and 35.
AZ Route 95 between mile markers 111 and 120.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3368 11424 3386 11424 3396 11399 3386 11388
3377 11392
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
INS2 follow-up statements
755
WGUS75 KPSR 302301
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
401 PM MST Mon Aug 30 2021
AZC012-310200-
/O.CON.KPSR.FF.W.0229.000000T0000Z-210831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-
401 PM MST Mon Aug 30 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING
FOR CENTRAL LA PAZ COUNTY...
At 401 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to 2 inches of rain have fallen.
Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Quartzsite and Bouse.
This includes the following highways...
AZ Route 72 between mile markers 26 and 35.
AZ Route 95 between mile markers 111 and 120.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3368 11424 3386 11424 3396 11399 3386 11388
3377 11392
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
INS486
WGUS75 KPSR 310152
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
652 PM MST Mon Aug 30 2021
AZC012-310202-
/O.EXP.KPSR.FF.W.0229.000000T0000Z-210831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-
652 PM MST Mon Aug 30 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 7 PM MST THIS EVENING FOR
CENTRAL LA PAZ COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3368 11424 3386 11424 3396 11399 3386 11388
3377 11392
$$
INSThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 5:05 PM MST | Special Weather Statement | PSR | 25 min | |
| Aug 29, 5:23 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 2 hr |
| Aug 29, 6:07 PM MST | Special Weather Statement | PSR | Pinal | 23 min |
| Aug 30, 12:42 AM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 4 hr |
| Aug 30, 1:43 AM MST | Flash Flood Watch | PSR | Gila, La Paz, Maricopa, Pinal, Yuma | 3 days |
| Aug 30, 1:41 PM MST | Special Weather Statement | PSR | La Paz | 34 min |
| Aug 30, 1:55 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 50 min |
| Aug 30, 2:24 PM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 3 hr |
| Aug 30, 3:04 PM MST | Special Weather Statement | PSR | La Paz | 26 min |
| Aug 30, 3:21 PM MST | Special Weather Statement | PSR | 24 min | |
| Aug 30, 3:32 PM MST | Special Weather Statement | PSR | La Paz | 28 min |
| Aug 30, 3:47 PM MST | Dust Storm Advisory | PSR | La Paz | 58 min |
| Aug 30, 4:48 PM MST | Special Weather Statement | PSR | 42 min | |
| Aug 30, 4:51 PM MST | Special Weather Statement | PSR | Gila | 39 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.