Alert archive / Arizona / Dust Storm Warnings in 2021

Dust Storm Warning 9, NWS Tucson, AZ

August 28, 2021Pima County, Arizona

NWS Tucson, AZ issued this dust storm warning at Aug 28, 2021, 3:53 PM MST for Pima County, Arizona. It was in force for 52 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 28, 2021, 3:53 PM MST (22:53 UTC)
Expired: Aug 28, 2021, 4:45 PM MST
In force: 52 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Pima County, AZ

The radar

The Tucson radar (KEMX), 28 km from the middle of the area, began a volume at 22:56 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

Tuscon, AZ (KTUS), launched 12:00Z, 10.9 hours before the alert went out and 15 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: 21 J/kg
Mixed-layer CIN: -393 J/kg
Mixed-layer LCL: 2964 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

793 
WWUS55 KTWC 282253
DSWTWC

BULLETIN - EAS ACTIVATION REQUESTED
Dust Storm Warning
National Weather Service Tucson AZ
353 PM MST Sat Aug 28 2021

AZC019-282345-
/O.NEW.KTWC.DS.W.0009.210828T2253Z-210828T2345Z/
Pima-
353 PM MST Sat Aug 28 2021

The National Weather Service in Tucson has issued a

* Dust Storm Warning for...
  East central Pima County in southeastern Arizona...

* Until 445 PM MST.

* At 350 PM MST, an area of blowing dust was located near southern 
  Tucson southward to near Corona De Tucson and Sahuarita, moving 
  west at 20 mph.

  HAZARD...Less than a quarter mile visibility with strong wind in 
           excess of 45 mph.

  SOURCE...Detected by National Weather Service meteorologists.

  IMPACT...Dangerous life-threatening travel.

* This includes the following highways...
   Interstate 10 between mile markers 267 and 283.
   Interstate 19 between mile markers 41 and 60.
   Route 83 between mile markers 53 and 58.
   Route 86 between mile markers 159 and 165.

Locations impacted include...
Southern Tucson, Sahuarita, Green Valley, Drexel Heights, Vail, 
Pascua Pueblo Yaqui Reservation, Summit, Corona De Tucson, Valencia 
West, Tucson International Airport, San Xavier Mission and Ryan 
AirField.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Dust storms lead to dangerous driving conditions with visibility
reduced to near zero. If driving, avoid dust storms if possible. If
caught in one, pull off the road, turn off your lights and keep your
foot off the brake.

&&

LAT...LON 3211 11069 3193 11065 3184 11114 3219 11121
TIME...MOT...LOC 2250Z 089DEG 12KT 3204 11079 

$$

Meyer

1 follow-up statement

973 
WWUS55 KTWC 282349
DSWTWC

Dust Storm Warning
National Weather Service Tucson AZ
449 PM MST Sat Aug 28 2021

AZC019-282357-
/O.EXP.KTWC.DS.W.0009.000000T0000Z-210828T2345Z/
Pima-
449 PM MST Sat Aug 28 2021

...THE DUST STORM WARNING FOR EAST CENTRAL PIMA COUNTY HAS EXPIRED...

The dust storm which prompted the warning south of Tucson has moved 
west. Therefore, the dust storm warning has been allowed to expire. 
A dust storm warning remains in effect over the Tohono O'Odham 
Nation and southern to southwest Pinal County.

LAT...LON 3211 11069 3193 11065 3184 11114 3219 11121
TIME...MOT...LOC 2347Z 089DEG 12KT 3204 11099 

$$

Meyer

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 5:01 PM MST	Special Weather Statement	TWC		44 min
Aug 27, 5:04 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 27, 5:27 PM MST	Special Weather Statement	TWC		33 min
Aug 28, 3:54 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 28, 2:34 PM MST	Special Weather Statement	TWC	Santa Cruz	41 min
Aug 28, 2:42 PM MST	Special Weather Statement	TWC	Santa Cruz	48 min
Aug 28, 3:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Aug 28, 3:32 PM MST	Areal Flood Advisory	TWC	Pima	118 min
Aug 28, 3:49 PM MST	Special Weather Statement	TWC	Santa Cruz	41 min
Aug 28, 3:57 PM MST	Flash Flood Warning	TWC	Santa Cruz	108 min
Aug 28, 3:58 PM MST	Severe Thunderstorm Warning	TWC	Pima	62 min
Aug 28, 4:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	117 min
Aug 28, 4:06 PM MST	Special Weather Statement	TWC		39 min
Aug 28, 4:14 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 28, 4:24 PM MST	Severe Thunderstorm Warning	TWC	Pima	51 min
Aug 28, 4:26 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Aug 28, 4:26 PM MST	Severe Thunderstorm Warning	TWC	Pima	34 min
Aug 28, 4:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	119 min
Aug 28, 4:34 PM MST	Areal Flood Advisory	TWC	Graham, Pinal	116 min
Aug 28, 4:37 PM MST	Severe Thunderstorm Warning	TWC	Pinal	38 min
Aug 28, 4:47 PM MST	Dust Storm Warning	TWC	Pima, Pinal	118 min
Aug 28, 4:58 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	62 min

Nearby

Dust Storm Warnings in Arizona, 2021 Every dust storm 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.