Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 47, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 10, 2021, 7:26 PM PDT for Imperial County, Riverside County, California; La Paz County, Maricopa County, Yuma County, Arizona. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2021, 7:26 PM PDT (02:26 UTC)
- Expired
- Aug 10, 2021, 8:15 PM PDT
- In force
- 49 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties La Paz County, AZ, Maricopa County, AZ, Yuma County, AZ, Imperial County, CA, Riverside County, CA
The radar
The Yuma radar (KYUX), 157 km from the middle of the area, began a volume at 02:25 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, 2.4 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
- 934 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1571 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
027
WUUS55 KPSR 110226
SVRPSR
AZC012-013-027-CAC025-065-110315-
/O.NEW.KPSR.SV.W.0047.210811T0226Z-210811T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
726 PM MST Tue Aug 10 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
La Paz County in west central Arizona...
North central Yuma County in southwestern Arizona...
Maricopa County in south central Arizona...
Northeastern Imperial County in southeastern California...
Riverside County in southern California...
* Until 815 PM MST/815 PM PDT/.
* At 723 PM MST/723 PM PDT/, multiple severe thunderstorms were
located over central La Paz County, moving southwest at 15 mph.
HAZARD...60 mph wind gusts. Dense blowing dust.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. Very hazardous
driving conditions due to sudden very strong wind gusts
and poor visibility.
* Locations impacted include...
Blythe, Quartzsite, Cibola, Salome, Brenda, Bouse, Vicksburg
Junction, Wenden, Vicksburg, Harcuvar, and Ehrenberg.
This includes the following highways...
AZ Interstate 10 between mile markers 1 and 71.
CA Interstate 10 between mile markers 153 and 156.
US Highway 60 between mile markers 31 and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Motorists should not drive into a dust storm. PULL ASIDE STAY ALIVE!
Very heavy rainfall in some spots will cause flooding of
normally dry washes and low lying areas. Do not drive your vehicle
through flooded roadways.
&&
LAT...LON 3402 11354 3374 11328 3341 11337 3321 11474
3395 11448
TIME...MOT...LOC 0223Z 037DEG 15KT 3368 11368
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AJ1 follow-up statement
809
WWUS55 KPSR 110308
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
808 PM MST Tue Aug 10 2021
AZC012-013-027-CAC025-065-110315-
/O.CON.KPSR.SV.W.0047.000000T0000Z-210811T0315Z/
La Paz AZ-Yuma AZ-Maricopa AZ-Imperial CA-Riverside CA-
808 PM MST Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM
MST/815 PM PDT/ FOR LA PAZ...NORTH CENTRAL YUMA...MARICOPA...
NORTHEASTERN IMPERIAL AND RIVERSIDE COUNTIES...
At 806 PM MST/806 PM PDT/, severe thunderstorms were located
over central and southwestern portions of La Paz County moving
southwest at 15 mph.
HAZARD...60 mph wind gusts. Dense blowing dust.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. Very hazardous
driving conditions due to sudden very strong wind gusts and
poor visibility.
Locations impacted include...
Blythe, Quartzsite, Cibola, Salome, Brenda, Bouse, Vicksburg
Junction, Wenden, Vicksburg, Harcuvar, and Ehrenberg.
This includes the following highways...
AZ Interstate 10 between mile markers 1 and 71.
CA Interstate 10 between mile markers 153 and 156.
US Highway 60 between mile markers 31 and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3402 11354 3374 11328 3341 11337 3321 11474
3395 11448
TIME...MOT...LOC 0306Z 037DEG 15KT 3353 11381
HAIL...<.75IN
WIND...60MPH
$$
AJThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:30 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 45 min |
| Aug 10, 7:15 PM PDT | Dust Storm Warning | PSR | Imperial, Riverside, San Bernardino | 60 min |
| Aug 10, 7:33 PM PDT | Flash Flood Warning | PSR | Imperial, Riverside | 4 hr |
| Aug 10, 8:18 PM PDT | Severe Thunderstorm Warning | PSR | Imperial, Riverside | 57 min |
| Aug 10, 8:38 PM PDT | Dust Storm Warning | PSR | Imperial, Riverside | 52 min |
| Aug 10, 9:08 PM PDT | Flash Flood Warning | PSR | Imperial, Riverside | 6 hr |
| Aug 10, 9:42 PM PDT | Dust Storm Warning | PSR | Imperial | 93 min |
| Aug 10, 9:54 PM PDT | Flash Flood Warning | PSR | Riverside | 86 min |
| Aug 10, 11:16 PM PDT | Special Weather Statement | PSR | Imperial | 74 min |
| Aug 11, 2:01 PM PDT | Dust Storm Advisory | PSR | Imperial | 59 min |
| Aug 10, 5:23 PM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 10, 5:35 PM PDT | Special Weather Statement | PSR | 40 min | |
| Aug 10, 5:51 PM PDT | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Aug 10, 5:55 PM PDT | Special Weather Statement | PSR | La Paz | 50 min |
| Aug 10, 6:36 PM PDT | Flash Flood Warning | PSR | La Paz, Maricopa | 4 hr |
| Aug 10, 7:43 PM PDT | Dust Storm Advisory | PSR | Maricopa, Pinal, Yuma | 62 min |
| Aug 10, 9:12 PM PDT | Flash Flood Warning | PSR | Maricopa, Yuma | 6 hr |
| Aug 10, 9:23 PM PDT | Special Weather Statement | PSR | Yuma | 97 min |
| Aug 10, 10:35 PM PDT | Flash Flood Warning | PSR | La Paz, Maricopa, Yuma | 6 hr |
| Aug 11, 12:01 AM PDT | Flash Flood Warning | PSR | La Paz, Yuma | 5 hr |
| Aug 11, 2:00 AM PDT | Areal Flood Advisory | PSR | Gila | 3 hr |
| Aug 11, 3:29 AM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 11, 4:33 AM PDT | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Aug 11, 6:06 AM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 11, 6:11 AM PDT | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Aug 11, 6:15 AM PDT | Areal Flood Advisory | PSR | Gila, Maricopa | 3 hr |
| Aug 11, 7:30 AM PDT | Flash Flood Warning | PSR | Gila, Maricopa | 6 hr |
| Aug 11, 7:46 AM PDT | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Aug 11, 8:12 AM PDT | Flash Flood Warning | PSR | Maricopa, Pinal | 6 hr |
| Aug 11, 9:13 AM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 11, 1:01 PM PDT | Special Weather Statement | PSR | Yuma | 59 min |
| Aug 11, 1:29 PM PDT | Areal Flood Warning | PSR | Maricopa | 6 hr |
| Aug 11, 1:43 PM PDT | Areal Flood Warning | PSR | Gila | 4 hr |
| Aug 11, 1:49 PM PDT | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Aug 11, 2:17 PM PDT | Severe Thunderstorm Warning | PSR | Yuma | 43 min |
| Aug 11, 3:02 PM PDT | Flash Flood Warning | PSR | Yuma | 4 hr |
| Aug 11, 3:11 PM PDT | Special Weather Statement | PSR | 64 min | |
| Aug 11, 3:29 PM PDT | Special Weather Statement | PSR | Maricopa | 46 min |
| Aug 11, 3:34 PM PDT | Special Weather Statement | PSR | 56 min | |
| Aug 11, 3:44 PM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 11, 3:47 PM PDT | Areal Flood Advisory | PSR | Maricopa | 14 min |
| Aug 11, 3:50 PM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 11, 4:01 PM PDT | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Aug 11, 4:33 PM PDT | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 11, 4:44 PM PDT | Dust Storm Advisory | PSR | Maricopa, Pinal | 61 min |
| Aug 11, 4:56 PM PDT | Flash Flood Warning | PSR | Maricopa | 3 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 2021Severe Thunderstorm Warnings in California, 2021Every severe thunderstorm 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.