Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 15, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 3, 2021, 6:10 PM 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 3, 2021, 6:10 PM MST (01:10 UTC)
- Expired
- Jul 3, 2021, 10:15 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), 87 km from the middle of the area, began a volume at 01:11 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, 1.2 hours before the alert went out and 58 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
- 281 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 3054 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
674
WGUS55 KPSR 040110
FFWPSR
AZC013-040515-
/O.NEW.KPSR.FF.W.0015.210704T0110Z-210704T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
610 PM MST Sat Jul 3 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Maricopa County in south central Arizona...
* Until 1015 PM MST.
* At 610 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
0.5 and 2 inches of rain have fallen. Additional rainfall amounts
of 0.5 to 1.5 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 and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Phoenix, Glendale, Peoria, Surprise, Sun City West, Wittmann, Sun
City, Circle City, Beardsley, Surprise Stadium and Vistancia.
This includes the following highways...
US Highway 60 between mile markers 123 and 132.
AZ Route 303 between mile markers 117 and 126.
AZ Route 74 between mile markers 10 and 19.
AZ Interstate 17 near mile marker 237.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3399 11219 3399 11213 3371 11219 3366 11225
3362 11239 3375 11256 3387 11262 3394 11250
3388 11228 3389 11228 3391 11226 3391 11224
3392 11224 3394 11223 3394 11224 3396 11224
3396 11223 3397 11220
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SDB2 follow-up statements
240
WGUS75 KPSR 040328
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
828 PM MST Sat Jul 3 2021
AZC013-040515-
/O.CON.KPSR.FF.W.0015.000000T0000Z-210704T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Maricopa AZ-
828 PM MST Sat Jul 3 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM MST THIS
EVENING FOR MARICOPA COUNTY...
At 828 PM MST, Doppler radar and automated rain gauges indicated
heavy rain fell across the warned area earlier. Light to moderate
rain is still falling in the area. Between 1 and 2 inches of rain
have fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Surprise, Sun City West, Beardsley and Vistancia.
This includes the following highways...
US Highway 60 between mile markers 138 and 141.
AZ Route 303 between mile markers 120 and 129.
AZ Route 74 between mile markers 10 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3378 11226 3369 11229 3365 11237 3380 11254
3387 11252 3390 11238 3388 11228 3389 11228
3391 11224 3392 11224 3394 11223 3394 11224
3395 11224 3396 11224 3396 11223 3392 11220
3383 11225
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SDB110
WGUS75 KPSR 040512
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
1012 PM MST Sat Jul 3 2021
AZC013-040522-
/O.EXP.KPSR.FF.W.0015.000000T0000Z-210704T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Maricopa AZ-
1012 PM MST Sat Jul 3 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM MST THIS EVENING FOR
MARICOPA COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3378 11226 3369 11229 3365 11237 3380 11254
3387 11252 3390 11238 3388 11228 3389 11228
3391 11224 3392 11224 3394 11223 3394 11224
3395 11224 3396 11224 3396 11223 3392 11220
3383 11225
$$
SDBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 5:11 PM MST | Special Weather Statement | PSR | 49 min | |
| Jul 3, 5:20 PM MST | Special Weather Statement | PSR | 25 min | |
| Jul 3, 5:29 PM MST | Areal Flood Advisory | PSR | Pinal | 3 hr |
| Jul 3, 5:32 PM MST | Special Weather Statement | PSR | Maricopa | 43 min |
| Jul 3, 5:38 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 3, 5:41 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 44 min |
| Jul 3, 5:43 PM MST | Dust Storm Warning | PSR | Maricopa | 62 min |
| Jul 3, 5:56 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 3, 6:05 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 3, 6:20 PM MST | Special Weather Statement | PSR | Maricopa | 40 min |
| Jul 3, 6:23 PM MST | Flash Flood Warning | PSR | Gila, Maricopa | 4 hr |
| Jul 3, 6:31 PM MST | Special Weather Statement | PSR | Gila | 44 min |
| Jul 3, 6:43 PM MST | Dust Storm Warning | PSR | La Paz, Maricopa, Pinal, Yuma | 62 min |
| Jul 3, 6:46 PM MST | Flash Flood Warning | PSR | Gila, Maricopa | 4 hr |
| Jul 3, 7:13 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Jul 4, 3:09 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 4, 3:43 PM MST | Special Weather Statement | PSR | Gila | 32 min |
| Jul 4, 4:10 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 4, 4:36 PM MST | Special Weather Statement | PSR | Gila | 24 min |
| Jul 4, 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.