06 Jun 2022 | 08:07 AM UTC
US, Mexico: Monsoon storms likely in parts of the southwestern US and northwestern Mexico through September
Monsoon storms are likely in southwestern US and northwestern Mexico through September. Flash flooding could cause transport disruptions.
Event
The North American Monsoon is forecast to produce regular showers and thunderstorms in parts of the southwestern US and northwestern Mexico through at least the end of September. Near-daily, isolated storms will be possible in parts of Colorado, Utah, Nevada, Arizona, and New Mexico in the US, as well as Sonora, Chihuahua, Sinaloa, and Durango states in Mexico and the surrounding areas. Severe storms could produce torrential downpours, flash flooding, hail, and strong winds. Normally dry streams, creeks, and arroyos could quickly become inundated with floodwaters. Wind gusts of up to 80 kph (50 mph) have the potential to produce power outages throughout the affected area. Wind from thunderstorms could also lead to the formation of dust storms, particularly in the southwestern US.
Transport
The monsoon storms could produce localized ground and air transport disruptions in the southwestern US and northern Mexico through the end of September. Traffic and commercial trucking delays could occur on regional highways, including along parts of the I-8, I-10, I-15, I-17, I-25, I-40, I-70, I-80, and I-84 corridors in the US. Similar disruptions are possible along Mexican Federal highways 2, 10, 14, 15, 16, 17, and 24. Flash flooding could inundate low-lying roads, especially those located in urban areas. Inclement weather conditions, including blowing dust and heavy rain, could severely affect visibility, possibly creating hazardous driving conditions. Flight delays and cancellations are unlikely to be widespread; however, some disruptions cannot be ruled out at airports serving Albuquerque (ABQ), Denver (DEN), Las Vegas (LAS), Phoenix (PHX), Salt Lake City (SLC), and Tucson (TUS).
Advice
Stay away from streams, creeks, arroyos, and other watercourses that may be prone to flash flooding. Seek updated information on road conditions before driving or routing shipments through areas where severe weather or flooding is forecast. Plan for possible supply chain disruptions if routing shipments through the southwestern US or northern Mexico. Do not attempt to drive on flooded roads. Confirm flights.
Resources
National Weather Service
Mexico National Meteorological Service
US Road Conditions
