Alert archive / California / Dust Storm Advisories in 2021

Dust Storm Advisory 45, NWS Phoenix, AZ

August 30, 2021La Paz County, Arizona; Imperial County, Riverside County, California

NWS Phoenix, AZ issued this dust storm advisory at Aug 30, 2021, 3:47 PM MST for La Paz County, Arizona; Imperial County, Riverside County, California. It was in force for 58 min.

The area

The counties it named.

The facts

Issued: Aug 30, 2021, 3:47 PM MST (22:47 UTC)
Expired: Aug 30, 2021, 4:45 PM MST
In force: 58 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon

Counties La Paz County, AZ, Imperial County, CA, Riverside County, CA

The radar

The Yuma radar (KYUX), 120 km from the middle of the area, began a volume at 22:50 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 12:00Z, 10.8 hours before the alert went out and 209 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1798 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dust storm advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this dust storm advisory went out at Aug 30, 3:42 PM MST, 5 minutes earlier.

Area forecast discussion, Aug 30, 3:42 PM MST, 5 minutes before

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In the hours before

Special weather statement, Aug 30, 1:41 PM MST, 2 hours 6 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
141 PM MST Mon Aug 30 2021

AZZ531-533-302115-
Kofa AZ-Central La Paz AZ-
141 PM MST Mon Aug 30 2021

...A strong thunderstorm will impact portions of central La Paz and
north central Yuma Counties through 215 PM MST...

At 140 PM MST, Doppler radar was tracking a strong thunderstorm over
Kofa Wildlife Refuge, or 45 miles south of Parker, moving northwest
at 15 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Quartzsite, Kofa Wildlife Refuge and Brenda.

This includes the following highways...
AZ Interstate 10 between mile markers 18 and 42.
US Highway 60 between mile markers 31 and 37.
AZ Route 95 between mile markers 91 and 112.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3368 11381 3336 11382 3348 11430 3372 11422
TIME...MOT...LOC 2040Z 115DEG 11KT 3351 11399

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

INS

Special weather statement, Aug 30, 3:04 PM MST, 43 minutes before

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Special weather statement, Aug 30, 3:21 PM MST, 26 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
321 PM PDT Mon Aug 30 2021

CAZ564-570-302245-
Chuckwalla Mountains CA-Chuckwalla Valley CA-
321 PM PDT Mon Aug 30 2021

...A strong thunderstorm will impact portions of Riverside County
through 345 PM PDT...

At 321 PM PDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Desert Center, moving northwest at 5 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Desert Center.

This includes the following highways...
CA Interstate 10 between mile markers 101 and 117.
CA Route 177 between mile markers 1 and 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3377 11514 3363 11522 3368 11548 3368 11549
      3386 11538
TIME...MOT...LOC 2221Z 115DEG 6KT 3375 11526

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

INS

Special weather statement, Aug 30, 3:32 PM MST, 15 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
332 PM MST Mon Aug 30 2021

AZZ530-531-533-CAZ569-302300-
Kofa AZ-Parker Valley AZ-Central La Paz AZ-Palo Verde Valley CA-
332 PM MST Mon Aug 30 2021

...A strong thunderstorm will impact portions of west central La Paz,
northeastern Imperial and Riverside Counties through 400 PM MST/400
PM PDT/...

At 332 PM MST/332 PM PDT/, Doppler radar was tracking a strong
thunderstorm 10 miles southeast of Blythe, or 39 miles north of
Martinez Lake, moving west at 5 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Blythe, Quartzsite, Ehrenberg and East Blythe.

This includes the following highways...
AZ Interstate 10 between mile markers 1 and 16.
CA Interstate 10 between mile markers 154 and 156.
CA Route 95 between mile markers 1 and 2, and between mile markers 8
and 9.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3369 11424 3335 11436 3340 11465 3372 11455
TIME...MOT...LOC 2232Z 106DEG 5KT 3354 11443

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

INS

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 29, 5:05 PM MST	Special Weather Statement	PSR		25 min
Aug 29, 5:23 PM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	2 hr
Aug 29, 6:07 PM MST	Special Weather Statement	PSR	Pinal	23 min
Aug 30, 12:42 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	4 hr
Aug 30, 1:43 AM MST	Flash Flood Watch	PSR	Gila, La Paz, Maricopa, Pinal, Yuma	3 days
Aug 30, 1:41 PM MST	Special Weather Statement	PSR	La Paz	34 min
Aug 30, 1:55 PM MST	Severe Thunderstorm Warning	PSR	La Paz	50 min
Aug 30, 2:24 PM MST	Areal Flood Advisory	PSR	La Paz, Yuma	3 hr
Aug 30, 2:55 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 30, 3:04 PM MST	Special Weather Statement	PSR	La Paz	26 min
Aug 30, 3:21 PM MST	Special Weather Statement	PSR		24 min
Aug 30, 3:32 PM MST	Special Weather Statement	PSR	La Paz	28 min
Aug 30, 4:48 PM MST	Special Weather Statement	PSR		42 min
Aug 30, 4:51 PM MST	Special Weather Statement	PSR	Gila	39 min
Aug 30, 4:56 PM MST	Dust Storm Advisory	PSR	Imperial, Riverside, San Bernardino	94 min

Nearby

Dust Storm Advisories in California, 2021 Dust Storm Advisories in Arizona, 2021 Every dust storm advisory 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.