14 Jul 2022 | 01:55 AM UTC
US: Adverse weather forecast across portions of the South and Southeast regions through at least early July 16
Heavy rainfall, possible flooding forecast across parts of South and Southeast regions, US, through early July 16. Disruptions possible.
Event
Rounds of heavy rainfall and possible flooding are forecast to occur across portions of the South and Southeast regions through at least early July 16. The Weather Prediction Center (WPC) has issued a "Slight Risk" for excessive rainfall for portions of eastern Louisiana, southern Mississippi, and southwestern Alabama through early July 14, where the heaviest rainfall is forecast. A "Slight Risk" for excessive rainfall is also in place for portions of the Southeast and Gulf Coast July 14 and for portions of the central Gulf Coast July 15 through early July 16. Heavy rainfall across the affected area could lead to floods and flash flooding, especially over already waterlogged soil and rivers with high water levels. Officials could update and possibly extend the coverage of the relevant weather alerts over the coming days.
As of late July 13, authorities have not yet issued any flood or flash flood watches and warnings in relation to the severe weather but are likely to in the coming hours and days as the storm progresses.
Hazardous Conditions
The storms will be capable of producing heavy downpours and damaging winds across the affected area. 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 airports in the region, including but not limited to Louis Armstrong New Orleans International Airport (MSY). Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible 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.
