Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 80, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 25, 2021, 10:41 AM MST for Maricopa 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
- Jul 25, 2021, 10:41 AM MST (17:41 UTC)
- Expired
- Jul 25, 2021, 2:45 PM MST
- In force
- 4 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 60 km from the middle of the area, began a volume at 17:44 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, 5.7 hours before the alert went out and 163 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
- 4 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 803 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
970
WGUS55 KPSR 251741
FFWPSR
AZC013-252145-
/O.NEW.KPSR.FF.W.0080.210725T1741Z-210725T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
1041 AM MST Sun Jul 25 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Maricopa County in south central Arizona...
* Until 245 PM MST.
* At 1041 AM MST, Doppler radar indicated heavy rain across the
warned area. Between 0.5 and 1.5 inches of rain have 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. Heavy rain 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...
Phoenix, Scottsdale, Cave Creek and Carefree.
This includes the following streams and drainages...
Cave Creek and Apache Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3381 11199 3380 11191 3374 11191 3371 11201
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SDB1 follow-up statement
060 WGUS75 KPSR 252142 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 242 PM MST Sun Jul 25 2021 AZC013-252152- /O.EXP.KPSR.FF.W.0080.000000T0000Z-210725T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Maricopa AZ- 242 PM MST Sun Jul 25 2021 ...FLASH FLOOD WARNING WILL EXPIRE AT 245 PM MST THIS AFTERNOON FOR THE NORTH SCOTTSDALE AREA IN MARICOPA COUNTY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. A Flash Flood Watch remains in effect until 1200 AM MST Monday for a portion of south central Arizona. LAT...LON 3381 11199 3380 11191 3374 11191 3371 11201 $$ Iniguez
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 10:57 PM MST | Areal Flood Advisory | PSR | Maricopa | 5 hr |
| Jul 25, 4:45 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 25, 6:27 AM MST | Areal Flood Advisory | PSR | Pinal | 3 hr |
| Jul 25, 7:14 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 25, 7:38 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 25, 7:57 AM MST | Areal Flood Advisory | PSR | Pinal | 3 hr |
| Jul 25, 8:01 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 25, 8:45 AM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 4 hr |
| Jul 25, 8:51 AM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Jul 25, 9:00 AM MST | Flash Flood Warning | PSR | Pinal | 4 hr |
| Jul 25, 9:39 AM MST | Areal Flood Advisory | PSR | Maricopa | 17 min |
| Jul 25, 9:47 AM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Jul 25, 9:56 AM MST | Flash Flood Warning | PSR | Maricopa | 8 hr |
| Jul 25, 10:08 AM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 4 hr |
| Jul 25, 10:16 AM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 25, 12:11 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 25, 12:35 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 25, 12:54 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 25, 2:10 PM MST | Flash Flood Warning | PSR | Gila, Maricopa | 4 hr |
| Jul 25, 2:14 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Jul 25, 2:18 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Jul 25, 3:29 PM MST | Special Weather Statement | PSR | La Paz | 31 min |
| Jul 25, 4:02 PM MST | Flash Flood Warning | PSR | La Paz | 4 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.