Alert archive / California / Dust Storm Advisories in 2021

Dust Storm Advisory 21, NWS Phoenix, AZ

July 21, 2021Imperial County, California; Yuma County, Arizona

NWS Phoenix, AZ issued this dust storm advisory at Jul 21, 2021, 8:13 PM PDT for Imperial County, California; Yuma County, Arizona. It was in force for 47 min.

The area

The outline as issued.

The facts

Issued: Jul 21, 2021, 8:13 PM PDT (03:13 UTC)
Expired: Jul 21, 2021, 9:00 PM PDT
In force: 47 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon

Counties Yuma County, AZ, Imperial County, CA

The radar

The Yuma radar (KYUX), 19 km from the middle of the area, began a volume at 03:12 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, 3.2 hours before the alert went out and 253 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: 2261 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

041 
WWUS55 KPSR 220313
DSWPSR

Dust Advisory
National Weather Service Phoenix AZ
813 PM MST Wed Jul 21 2021

AZC027-CAC025-220400-
/O.NEW.KPSR.DS.Y.0021.210722T0313Z-210722T0400Z/
Yuma AZ-Imperial CA-
813 PM MST Wed Jul 21 2021

The National Weather Service in Phoenix has issued a

* Dust Advisory for...
  Southwestern Yuma County in southwestern Arizona...
  Southeastern Imperial County in southeastern California...

* Until 900 PM MST/900 PM PDT/.

* At 812 PM MST/812 PM PDT/, a wall of dust was along a line
  extending from 16 miles south of Wellton to near Ligurta to near
  Kinter, moving west at 25 mph.

  HAZARD...Less than one mile visibility with strong wind in excess 
           of 30 mph.

  SOURCE...Doppler radar.

  IMPACT...Hazardous travel.

* This includes the following highways...
  AZ Interstate 8 between mile markers 1 and 25.
  CA Interstate 8 between mile markers 87 and 96.
  AZ Route 95 between mile markers 29 and 50.

Locations impacted include...
Yuma, Somerton, Fortuna Foothills, Blaisdell, Kinter, Andrade,
Ligurta, Winterhaven and Araby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Blowing dust brings reduced visibility, leading to dangerous driving
conditions. If driving, avoid blowing dust if possible. If caught in
dense blowing dust, pull off the road, turn off your lights and keep
your foot off the brake.

&&

LAT...LON 3244 11464 3250 11474 3265 11477 3272 11472
      3272 11478 3281 11480 3293 11433 3280 11433
      3263 11422 3242 11389 3230 11420
TIME...MOT...LOC 0312Z 073DEG 20KT 3245 11404 3262 11430 3281 11446 

$$

CK

1 follow-up statement

400 
WWUS55 KPSR 220359
DSWPSR

Dust Advisory
National Weather Service Phoenix AZ
859 PM MST Wed Jul 21 2021

AZC027-CAC025-220408-
/O.EXP.KPSR.DS.Y.0021.000000T0000Z-210722T0400Z/
Yuma AZ-Imperial CA-
859 PM MST Wed Jul 21 2021

...THE DUST ADVISORY FOR SOUTHWESTERN YUMA AND SOUTHEASTERN IMPERIAL
COUNTIES WILL EXPIRE AT 900 PM MST/900 PM PDT/...

The blowing dust that prompted the advisory has dissipated and exited
the area. Therefore, the dust advisory will be allowed to expire.

LAT...LON 3244 11464 3250 11474 3265 11477 3272 11472
      3272 11478 3281 11480 3293 11433 3280 11433
      3263 11422 3242 11389 3230 11420
TIME...MOT...LOC 0358Z 073DEG 20KT 3238 11432 3255 11458 3274 11474 

$$

CK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 4:00 PM PDT	Special Weather Statement	PSR	Imperial	60 min
Jul 22, 4:30 PM PDT	Dust Storm Advisory	PSR	Imperial	41 min
Jul 22, 4:40 PM PDT	Areal Flood Advisory	PSR	Imperial	3 hr
Jul 21, 5:37 PM PDT	Special Weather Statement	PSR	Yuma	38 min
Jul 21, 5:41 PM PDT	Special Weather Statement	PSR		49 min
Jul 21, 6:18 PM PDT	Severe Thunderstorm Warning	PSR	La Paz, Yuma	42 min
Jul 21, 6:20 PM PDT	Special Weather Statement	PSR	Gila	40 min
Jul 21, 6:47 PM PDT	Special Weather Statement	PSR		43 min
Jul 21, 6:59 PM PDT	Special Weather Statement	PSR	Yuma	46 min
Jul 21, 7:06 PM PDT	Areal Flood Advisory	PSR	Gila	3 hr
Jul 21, 7:10 PM PDT	Special Weather Statement	PSR	La Paz	50 min
Jul 21, 7:17 PM PDT	Areal Flood Advisory	PSR	Yuma	44 min
Jul 21, 7:40 PM PDT	Dust Storm Warning	PSR	Yuma	35 min
Jul 21, 8:01 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Yuma	4 hr
Jul 21, 9:06 PM PDT	Dust Storm Advisory	PSR	Maricopa, Pinal	39 min
Jul 21, 10:06 PM PDT	Dust Storm Advisory	PSR	Maricopa, Pinal	39 min
Jul 21, 10:11 PM PDT	Special Weather Statement	PSR	Pinal	49 min
Jul 21, 10:23 PM PDT	Special Weather Statement	PSR	Maricopa	37 min
Jul 21, 10:25 PM PDT	Severe Thunderstorm Warning	PSR	Maricopa	16 min
Jul 21, 10:39 PM PDT	Special Weather Statement	PSR		36 min
Jul 21, 10:51 PM PDT	Severe Thunderstorm Warning	PSR	Maricopa	24 min
Jul 21, 11:12 PM PDT	Special Weather Statement	PSR		48 min
Jul 21, 11:15 PM PDT	Special Weather Statement	PSR	Pinal	45 min
Jul 22, 12:28 AM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 22, 12:32 AM PDT	Areal Flood Advisory	PSR	Maricopa	118 min
Jul 22, 3:06 PM PDT	Special Weather Statement	PSR		54 min
Jul 22, 3:43 PM PDT	Special Weather Statement	PSR	Maricopa	47 min
Jul 22, 3:58 PM PDT	Severe Thunderstorm Warning	PSR	Maricopa	33 min
Jul 22, 4:53 PM PDT	Areal Flood Advisory	PSR	Maricopa	3 hr

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.