641
WWUS75 KTWC 130747
NPWTWC

URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
1247 AM MST Wed Aug 13 2025

AZZ501>509-140600-
/O.NEW.KTWC.DU.Y.0014.250813T2100Z-250814T0600Z/
Western Pima County-Tohono O`odham Nation-Upper Santa Cruz River
Valley/Altar Valley-Tucson Metro Area-South Central Pinal County-
Southeast Pinal County-Upper San Pedro River Valley-Eastern
Cochise County below 5000 feet-Upper Gila River Valley-
Including the cities of Green Valley, Vail, Safford, Ajo,
Nogales, Sierra Vista, Clifton, Organ Pipe Cactus N.M., Douglas,
Tucson, Willcox, Picacho Peak State Park, Mammoth, Benson,
Marana, Oracle, and Sells
1247 AM MST Wed Aug 13 2025

...BLOWING DUST ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 11 PM
MST THIS EVENING...

* WHAT...Strong and gusty thunderstorm outflows between 40-45 mph
  are expected to produce blowing dust today, possibly developing
  into a haboob. Organized outflows will generally move west across
  Southeast Arizona with locations south and east of Tucson impacted
  this afternoon, then locations across Pima and Southeast Pinal
  counties impacted during the late afternoon and evening hours.
  Visibility between one-quarter and one mile in blowing dust are
  expected.

* WHERE...Eastern Cochise County below 5000 feet, South Central
  Pinal County, Southeast Pinal County, Tohono O`odham Nation,
  Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River
  Valley, Upper Santa Cruz River Valley/Altar Valley, and Western
  Pima County.

* WHEN...From 2 PM this afternoon to 11 PM MST this evening.

* IMPACTS...Blowing dust can restrict visibilities below a mile
  posing a significant hazard to motorists, especially those
  traveling along Interstate 10 through the San Simon Valley near
  the Arizona and New Mexico border this afternoon...and between
  Tucson and Phoenix late this afternoon and evening. In addition,
  strong and gusty winds will likely suspend dust into the air that
  people and animals breathe. Individuals with heart disease and
  respiratory sensitivities may want to reduce their level of
  exertion to limit the dust they breathe into their lungs,
  especially if they are near dust prone locations. Those most at
  risk may feel better if they avoid outside exercise today, keeping
  windows and doors closed to help reduce exposure.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons with respiratory problems should make preparations to stay
indoors until the storm passes. Be ready for a sudden drop in
visibility to near zero. If you encounter blowing dust or blowing
sand on the roadway or see it approaching, pull off the road as far
as possible and put your vehicle in park. Turn the lights all the
way off and keep foot off the brake pedal. Remember, `Pull Aside,
Stay Alive`.

&&

$$

CWR