04 Aug 2021 | 02:53 AM UTC
US: Adverse weather forecast across portions of the southwest region through at least early Aug. 5. /update 1
Heavy rainfall and possible flooding forecast across parts of the southwest US through at least early Aug. 5. Disruptions possible.
Event
Rounds of heavy rainfall and possible flooding are forecast to occur across portions of the southwestern US through at least early Aug. 5. The affected area includes central Colorado, central and northeastern New Mexico, and southern Wyoming. The Weather Prediction Center (WPC) has issued a "Moderate Risk" for excessive rainfall for central and southern Colorado as well as northeastern New Mexico, where the heaviest rainfall is forecast. A "Slight Risk" for excessive rainfall is in place for the rest of the affected area.
Additionally, flood and flash flood watches and warnings are in place for western Colorado, northeastern New Mexico, and southern Wyoming. Officials could update and possibly extend the coverage of the relevant weather alerts over the coming days.
Hazardous Conditions
The storms will be capable of producing heavy downpours and damaging winds across the affected area through at least early Aug. 5. Should sustained heavy rainfall occur, it could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed or a lack of stormwater drainage systems. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where the soil has become saturated by heavy rainfall. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.
Transport
Floodwaters and debris flows could render some bridges, rail networks, or roadways impassable, impacting overland travel around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.
Severe weather could also trigger flight delays and cancellations at regional airports. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas that see heavy rainfall and potential track inundation. Localized business disruptions may occur in low-lying areas; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.
Advice
Monitor local media for weather updates and related advisories. Confirm all transport reservations and business appointments before travel. Make allowances for localized travel delays and potential supply chain disruptions where flooding has been forecast. Do not drive on flooded roads. Charge battery-powered devices in the case of prolonged electricity outages.
