Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 119, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 30, 2021, 6:06 PM MST for Yuma County, Arizona; Imperial County, California. It was in force for 4 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 30, 2021, 6:06 PM MST (01:06 UTC)
- Expired
- Jul 30, 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 Yuma County, AZ, Imperial County, CA
The radar
The Yuma radar (KYUX), 25 km from the middle of the area, began a volume at 01:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 30, 7:53 PM MST | FLASH FLOOD | 3 E Felicity, CA | ***DELAYED REPORT*** ARAZ ROAD CLOSED DUE TO FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 1.1 hours before the alert went out and 236 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
- 2564 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
682
WGUS55 KPSR 310106
FFWPSR
AZC027-CAC025-310515-
/O.NEW.KPSR.FF.W.0119.210731T0106Z-210731T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
606 PM MST Fri Jul 30 2021
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Western Yuma County in southwestern Arizona...
Southeastern Imperial County in southeastern California...
* Until 1015 PM MST /1015 PM PDT/.
* At 606 PM MST /606 PM PDT/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Between 1 and 1.5
inches of rain have fallen. Additional rainfall amounts of 0.5 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...
Yuma, Winterhaven and Andrade.
This includes the following highways...
CA Interstate 8 between mile markers 89 and 96.
AZ Interstate 8 between mile markers 1 and 6.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3271 11478 3283 11471 3287 11463 3281 11454
3268 11453 3262 11457 3268 11466 3267 11475
3268 11474 3270 11473 3271 11473 3272 11472
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
INS2 follow-up statements
426
WGUS75 KPSR 310215
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
715 PM MST Fri Jul 30 2021
AZC027-CAC025-310515-
/O.CON.KPSR.FF.W.0119.000000T0000Z-210731T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yuma AZ-Imperial CA-
715 PM MST Fri Jul 30 2021 /715 PM PDT Fri Jul 30 2021/
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM MST/1015 PM
PDT/ THIS EVENING FOR WESTERN YUMA AND SOUTHEASTERN IMPERIAL
COUNTIES...
At 715 PM MST /715 PM PDT/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Between 1 and 2 inches
of rain have fallen. Additional rainfall amounts up to 0.5 inches
are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Yuma, Winterhaven and Andrade.
This includes the following highways...
CA Interstate 8 between mile markers 89 and 96.
AZ Interstate 8 between mile markers 1 and 6.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3271 11478 3283 11471 3287 11463 3281 11454
3268 11453 3262 11457 3268 11466 3267 11475
3268 11474 3270 11473 3271 11473 3272 11472
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
INS254
WGUS75 KPSR 310519
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
1019 PM PDT Fri Jul 30 2021
CAC025-310529-
/O.EXP.KPSR.FF.W.0119.000000T0000Z-210731T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Imperial CA-
1019 PM PDT Fri Jul 30 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR WESTERN YUMA AND SOUTHEASTERN
IMPERIAL COUNTIES...
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.
A Flash Flood Watch remains in effect until 500 AM PDT Saturday for
portions of Arizona and California.
LAT...LON 3271 11478 3283 11471 3287 11463 3281 11454
3268 11453 3262 11457 3268 11466 3267 11475
3268 11474 3270 11473 3271 11473 3272 11472
$$
HirschThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 5:04 PM MST | Dust Storm Advisory | PSR | Yuma | 41 min |
| Jul 30, 5:29 PM MST | Severe Thunderstorm Warning | PSR | Yuma | 46 min |
| Jul 30, 5:39 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Jul 30, 5:44 PM MST | Flash Flood Warning | PSR | Yuma | 4 hr |
| Jul 30, 5:59 PM MST | Dust Storm Warning | PSR | Yuma | 45 min |
| Jul 30, 6:51 PM MST | Severe Thunderstorm Warning | PSR | Yuma | 38 min |
| Jul 30, 7:06 PM MST | Special Weather Statement | PSR | Pinal | 24 min |
| Jul 30, 7:25 PM MST | Flash Flood Warning | PSR | Yuma | 3 hr |
| Jul 30, 7:32 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Jul 30, 7:51 PM MST | Special Weather Statement | PSR | Yuma | 69 min |
| Jul 30, 8:02 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 30, 8:29 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 72 min |
| Jul 30, 8:44 PM MST | Severe Thunderstorm Warning | PSR | La Paz, Maricopa | 61 min |
| Jul 30, 9:17 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Jul 30, 9:40 PM MST | Special Weather Statement | PSR | Maricopa | 65 min |
| Jul 30, 10:24 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 43 min |
| Jul 30, 10:37 PM MST | Special Weather Statement | PSR | Maricopa | 23 min |
| Jul 30, 10:45 PM MST | Special Weather Statement | PSR | 45 min | |
| Jul 30, 11:54 PM MST | Special Weather Statement | PSR | Maricopa | 51 min |
| Jul 31, 12:37 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 31, 1:34 AM MST | Areal Flood Advisory | PSR | Maricopa | 4 hr |
| Jul 31, 1:58 AM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 4 hr |
| Jul 31, 3:39 AM MST | Areal Flood Advisory | PSR | La Paz | 4 hr |
| Jul 31, 2:23 PM MST | Special Weather Statement | PSR | La Paz | 37 min |
| Jul 31, 3:03 PM MST | Special Weather Statement | PSR | Gila | 27 min |
| Jul 31, 3:18 PM MST | Special Weather Statement | PSR | La Paz | 27 min |
| Jul 31, 3:31 PM MST | Flash Flood Warning | PSR | Gila | 4 hr |
| Jul 31, 3:44 PM MST | Special Weather Statement | PSR | La Paz | 31 min |
| Jul 31, 3:55 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 30, 5:18 PM MST | Special Weather Statement | PSR | Imperial | 72 min |
| Jul 30, 5:20 PM MST | Special Weather Statement | PSR | Riverside | 70 min |
| Jul 30, 5:24 PM MST | Flash Flood Warning | PSR | Riverside | 4 hr |
| Jul 30, 5:33 PM MST | Flash Flood Warning | PSR | Imperial | 4 hr |
| Jul 30, 5:52 PM MST | Flash Flood Warning | PSR | Riverside | 4 hr |
| Jul 30, 6:11 PM MST | Severe Thunderstorm Warning | PSR | Riverside | 79 min |
| Jul 30, 6:31 PM MST | Special Weather Statement | PSR | Imperial | 74 min |
| Jul 30, 6:49 PM MST | Flash Flood Warning | PSR | Imperial, Riverside | 4 hr |
| Jul 31, 2:32 PM MST | Special Weather Statement | PSR | Riverside | 28 min |
| Jul 31, 3:47 PM MST | Special Weather Statement | PSR | Riverside | 28 min |
| Jul 31, 4:48 PM MST | Flash Flood Warning | PSR | Riverside | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2021Flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.