Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 95, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 25, 2021, 6:14 PM MST for La Paz County, Yuma 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, 6:14 PM MST (01:14 UTC)
- Expired
- Jul 25, 2021, 10:15 PM MST
- In force
- 4 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties La Paz County, AZ, Yuma County, AZ
The radar
The Yuma radar (KYUX), 111 km from the middle of the area, began a volume at 01:15 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 184 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.
083
WGUS55 KPSR 260114
FFWPSR
AZC012-027-260515-
/O.NEW.KPSR.FF.W.0095.210726T0114Z-210726T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
614 PM MST Sun Jul 25 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
North Central Yuma County in southwestern Arizona...
Southern La Paz County in west central Arizona...
* Until 1015 PM MST.
* At 614 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
are estimated to 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
and rural roads.
* Some locations that will experience flash flooding include...
Palm Canyon.
This includes the following streams and drainages...
Gravel Wash, Alamo Wash, Yaqui Wash, Red Raven Wash, Hoodoo Wash
and Cementosa Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3330 11411 3343 11397 3334 11366 3307 11385
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AJ2 follow-up statements
175
WGUS75 KPSR 260249
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
749 PM MST Sun Jul 25 2021
AZC012-027-260515-
/O.CON.KPSR.FF.W.0095.000000T0000Z-210726T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-Yuma AZ-
749 PM MST Sun Jul 25 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM MST THIS
EVENING FOR NORTH CENTRAL YUMA AND SOUTHERN LA PAZ COUNTIES...
At 749 PM MST, Doppler radar indicated that two to four inches of
rain has fallen within the Warning area. Flash flooding is likely
ongoing.
HAZARD...Life threatening flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of normally dry washes
and rural roads.
Some locations that will experience flash flooding include...
Palm Canyon.
This includes the following streams and drainages...
Gravel Wash, Alamo Wash, Yaqui Wash, Red Raven Wash, Hoodoo Wash
and Cementosa Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3330 11411 3343 11397 3334 11366 3307 11385
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AJ556 WGUS75 KPSR 260511 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 1011 PM MST Sun Jul 25 2021 AZC012-027-260521- /O.EXP.KPSR.FF.W.0095.000000T0000Z-210726T0515Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ La Paz AZ-Yuma AZ- 1011 PM MST Sun Jul 25 2021 ...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM MST THIS EVENING FOR NORTH CENTRAL YUMA AND SOUTHERN LA PAZ COUNTIES... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. LAT...LON 3330 11411 3343 11397 3334 11366 3307 11385 $$ 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, 6:30 PM MST | Areal Flood Warning | PSR | Maricopa | 5 hr |
| Jul 25, 6:58 PM MST | Flash Flood Warning | PSR | Yuma | 3 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.