Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 97, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 25, 2021, 6:54 PM PDT for Imperial County, California. 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, 6:54 PM PDT (01:54 UTC)
- Expired
- Jul 25, 2021, 11:00 PM PDT
- In force
- 4 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Imperial County, CA
The radar
The Yuma radar (KYUX), 80 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
San Diego, CA (KNKX), launched 00:00Z, 1.9 hours before the alert went out and 199 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1166 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
331
WGUS55 KPSR 260154
FFWPSR
CAC025-260600-
/O.NEW.KPSR.FF.W.0097.210726T0154Z-210726T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
654 PM PDT Sun Jul 25 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Central Imperial County in southeastern California...
* Until 1100 PM PDT.
* At 654 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 2 inches of rain have
fallen. Additional rainfall amounts up to 1 inch 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.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Ted Kipf Road or Niland-Glamis Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 3316 11512 3318 11511 3318 11500 3318 11499
3316 11498 3313 11498 3309 11499 3307 11500
3301 11510 3301 11515 3301 11517 3303 11519
3308 11523 3311 11523 3313 11522 3315 11517
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Iniguez2 follow-up statements
505
WGUS75 KPSR 260424 RRB
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
924 PM PDT Sun Jul 25 2021
CAC025-260600-
/O.CON.KPSR.FF.W.0097.000000T0000Z-210726T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Imperial CA-
924 PM PDT Sun Jul 25 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR CENTRAL IMPERIAL COUNTY...
At 924 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 2 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Ted Kipf Road or Niland-Glamis Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3316 11512 3318 11511 3318 11500 3318 11499
3316 11498 3313 11498 3309 11499 3307 11500
3301 11510 3301 11515 3301 11517 3303 11519
3308 11523 3311 11523 3313 11522 3315 11517
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Iniguez224
WGUS75 KPSR 260555
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
1055 PM PDT Sun Jul 25 2021
CAC025-260605-
/O.EXP.KPSR.FF.W.0097.000000T0000Z-210726T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Imperial CA-
1055 PM PDT Sun Jul 25 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 11 PM PDT THIS EVENING FOR
CENTRAL IMPERIAL COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3316 11512 3318 11511 3318 11500 3318 11499
3316 11498 3313 11498 3309 11499 3307 11500
3301 11510 3301 11515 3301 11517 3303 11519
3308 11523 3311 11523 3313 11522 3315 11517
$$
IniguezThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 6:13 PM PDT | Flash Flood Warning | PSR | Riverside | 4 hr |
| Jul 25, 6:35 PM PDT | Flash Flood Warning | PSR | Riverside | 4 hr |
| Jul 25, 8:08 PM PDT | Flash Flood Warning | PSR | Imperial | 4 hr |
| Jul 26, 1:52 AM PDT | Areal Flood Advisory | PSR | Imperial | 3 hr |
| Jul 26, 3:36 AM PDT | Flash Flood Warning | PSR | Riverside | 6 hr |
| Jul 26, 6:49 AM PDT | Areal Flood Advisory | PSR | Riverside | 3 hr |
| Jul 26, 8:01 AM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in California, 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.