Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 46, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 19, 2021, 6:52 PM MST for La Paz County, Arizona. It was in force for 2 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 19, 2021, 6:52 PM MST (01:52 UTC)
- Expired
- Jul 19, 2021, 9:10 PM MST
- In force
- 2 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County La Paz County, AZ
The radar
The Las Vegas radar (KESX), 181 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 209 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
- 431 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2659 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
446
WGUS55 KPSR 200152
FFWPSR
AZC012-200600-
/O.NEW.KPSR.FF.W.0046.210720T0152Z-210720T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
652 PM MST Mon Jul 19 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
North Central La Paz County in west central Arizona...
* Until 1100 PM MST.
* At 652 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Flash flooding is already occurring.
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...
mainly rural areas of North Central La Paz County
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.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3425 11389 3417 11389 3414 11391 3413 11402
3414 11409 3419 11412 3423 11411 3430 11411
3430 11409 3429 11407 3428 11405 3427 11405
3427 11404 3426 11404 3427 11402 3425 11401
3426 11396 3426 11394 3425 11393
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JS2 follow-up statements
913
WGUS75 KPSR 200236
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
736 PM MST Mon Jul 19 2021
AZC012-200600-
/O.CON.KPSR.FF.W.0046.000000T0000Z-210720T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-
736 PM MST Mon Jul 19 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING FOR NORTH CENTRAL LA PAZ COUNTY...
At 736 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 2.5 inches of rain have
fallen. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
mainly rural areas of North Central La Paz County
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3425 11389 3417 11389 3414 11391 3413 11402
3414 11409 3419 11412 3423 11411 3430 11411
3430 11409 3429 11407 3428 11405 3427 11405
3427 11404 3426 11404 3427 11402 3425 11401
3426 11396 3426 11394 3425 11393
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JS544
WGUS75 KPSR 200410
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
910 PM MST Mon Jul 19 2021
AZC012-200420-
/O.CAN.KPSR.FF.W.0046.000000T0000Z-210720T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-
910 PM MST Mon Jul 19 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTH CENTRAL LA PAZ
COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3425 11389 3417 11389 3414 11391 3413 11402
3414 11409 3419 11412 3423 11411 3430 11411
3430 11409 3429 11407 3428 11405 3427 11405
3427 11404 3426 11404 3427 11402 3425 11401
3426 11396 3426 11394 3425 11393
$$
18The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 6:20 PM MST | Special Weather Statement | PSR | La Paz | 40 min |
| Jul 20, 1:33 PM MST | Special Weather Statement | PSR | 42 min | |
| Jul 20, 1:41 PM MST | Special Weather Statement | PSR | 49 min | |
| Jul 20, 2:02 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 20, 2:17 PM MST | Special Weather Statement | PSR | 43 min | |
| Jul 20, 2:28 PM MST | Special Weather Statement | PSR | 32 min | |
| Jul 20, 2:37 PM MST | Special Weather Statement | PSR | 53 min | |
| Jul 20, 2:43 PM MST | Special Weather Statement | PSR | 47 min | |
| Jul 20, 2:57 PM MST | Special Weather Statement | PSR | 48 min | |
| Jul 20, 3:05 PM MST | Special Weather Statement | PSR | 40 min | |
| Jul 20, 3:08 PM MST | Special Weather Statement | PSR | 52 min | |
| Jul 20, 3:20 PM MST | Special Weather Statement | PSR | La Paz | 40 min |
| Jul 20, 3:32 PM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 3 hr |
| Jul 20, 3:36 PM MST | Special Weather Statement | PSR | 39 min | |
| Jul 20, 3:47 PM MST | Special Weather Statement | PSR | 43 min | |
| Jul 20, 3:55 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Jul 20, 4:21 PM MST | Special Weather Statement | PSR | 39 min | |
| Jul 20, 4:23 PM MST | Special Weather Statement | PSR | La Paz | 52 min |
| Jul 20, 4:30 PM MST | Special Weather Statement | PSR | 45 min | |
| Jul 20, 4:41 PM MST | Flash Flood Warning | PSR | La Paz | 3 hr |
| Jul 20, 4:47 PM MST | Special Weather Statement | PSR | Gila | 43 min |
| Jul 20, 4:53 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 20, 4:57 PM MST | Areal Flood Advisory | PSR | La Paz | 3 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.