Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 98, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 25, 2021, 6:58 PM MST for Yuma County, Arizona. It was in force for 3 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, 6:58 PM MST (01:58 UTC)
- Expired
- Jul 25, 2021, 10:13 PM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Yuma County, AZ
The radar
The Yuma radar (KYUX), 96 km from the middle of the area, began a volume at 01:58 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, 2.0 hours before the alert went out and 175 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
- 602 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 735 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
702
WGUS55 KPSR 260158
FFWPSR
AZC027-260600-
/O.NEW.KPSR.FF.W.0098.210726T0158Z-210726T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
658 PM MST Sun Jul 25 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
East Central Yuma County in southwestern Arizona...
* Until 1100 PM MST.
* At 658 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 ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of normally dry
washes, rural roads, and low lying areas.
* Some locations that will experience flash flooding include...
Mohawk.
This includes the following highways...
AZ Interstate 8 between mile markers 53 and 62.
This includes the following streams and drainages...
San Cristobal Wash, Gila River and Mohawk Canal.
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 3276 11361 3271 11377 3291 11388 3296 11365
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AJ2 follow-up statements
506
WGUS75 KPSR 260424 RRA
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
924 PM MST Sun Jul 25 2021
AZC027-260600-
/O.CON.KPSR.FF.W.0098.000000T0000Z-210726T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yuma AZ-
924 PM MST Sun Jul 25 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING FOR EAST CENTRAL YUMA COUNTY...
At 924 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Mohawk.
This includes the following highways...
AZ Interstate 8 between mile markers 53 and 62.
This includes the following streams and drainages...
San Cristobal Wash, Gila River and Mohawk Canal.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3276 11361 3271 11377 3291 11388 3296 11365
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Iniguez251 WGUS75 KPSR 260513 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 1013 PM MST Sun Jul 25 2021 AZC027-260523- /O.CAN.KPSR.FF.W.0098.000000T0000Z-210726T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Yuma AZ- 1013 PM MST Sun Jul 25 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR EAST CENTRAL YUMA 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 3276 11361 3271 11377 3291 11388 3296 11365 $$ Iniguez
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 5:10 PM MST | Flash Flood Warning | PSR | La Paz, Yuma | 4 hr |
| Jul 25, 5:35 PM MST | Special Weather Statement | PSR | 25 min | |
| Jul 25, 6:04 PM MST | Special Weather Statement | PSR | 41 min | |
| Jul 25, 6:14 PM MST | Flash Flood Warning | PSR | La Paz, Yuma | 4 hr |
| Jul 25, 6:30 PM MST | Areal Flood Warning | PSR | Maricopa | 5 hr |
| Jul 25, 7:20 PM MST | Areal Flood Warning | PSR | Maricopa | 14 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.