Impact Level: Notification
Locations Affected: North Dakota, South Dakota, Nebraska, Minnesota, Wisconsin, Michigan, Iowa, Illinois, Indiana, Ohio, Pennsylvania, New York, Kansas, Oklahoma, Kentucky, West Virginia, Texas, New Mexico, Missouri, Colorado, Florida, Georgia, South Carolina, Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New Jersey, Delaware, Maryland, Virginia, North Carolina, United States
Tracking Id: RINTP4931280109
Description:
As per reports, a clipper system tracking across the nation’s heartland toward the international border is expected to drive shifting weather patterns across multiple regions of the US on Thursday (09 April), with heavy rainfall persisting over Florida and showers and thunderstorms returning to the Plains and Western US.
• A stationary front draped across the Florida Straits continues to support an active weather pattern across the eastern Florida Peninsula on Thursday (09 April). Heavy rain and thunderstorms are forecast to persist through the day, with isolated to scattered instances of flash flooding possible across urbanized areas, including Miami and Fort Lauderdale, where rainfall accumulations of three to five inches are possible. Storm coverage is expected to gradually decrease through Thursday (09 April) as easterly flow into the Peninsula weakens.
• As the front associated with the clipper system begins to stall across the Plains and Midwest, isolated to scattered showers and thunderstorms are forecast to develop across the Central Plains (Kansas, Nebraska, Oklahoma) and Midwest (Illinois, Indiana, Iowa, Missouri) during Thursday afternoon and evening (09 April). The Storm Prediction Center (SPC) has noted that isolated severe hail and wind are possible within the strongest storm cores across western and central Kansas.
• Thunderstorm coverage is expected to increase across the Central Plains and surrounding areas through Thursday afternoon (09 April) as moisture and instability advect northward from the Gulf of Mexico, supporting daily chances of isolated to scattered severe weather and heavy rainfall over the region.
• The Weather Prediction Center (WPC) has issued a marginal risk for excessive rainfall across parts of the Central Plains and Midwest for Thursday (09 April), increasing the potential for localised flooding in urban areas and low-lying terrain.
• Rainfall and thunderstorms are also expected to develop across the Southern Rockies and southern High Plains (New Mexico, Colorado, Texas, Oklahoma), associated with increased atmospheric instability and Gulf moisture advection.
• Critical fire weather conditions remain a concern across south-central and eastern Georgia and south-western South Carolina on Thursday (09 April), with elevated risk associated with dry conditions and strong winds.
• A warming trend is forecast to develop from the Southeast northward toward the Upper Midwest, Great Lakes, and Northeast/Mid-Atlantic as downstream high pressure builds, with temperatures expected to trend above seasonal averages across these regions through the weekend.
• Looking ahead, WPC has issued marginal risk threat areas for excessive rainfall across the southern Plains for Saturday (11 April) and Sunday (12 April), with the heavy convective rain threat potentially lingering into Monday (13 April) and expanding northeastward into the Mississippi Valley and Midwest as the system strengthens. SPC has also indicated a severe weather threat extending through the weekend into early next week.
Impact:
• Isolated severe hail and damaging wind gusts across western and central Kansas on Thursday (09 April) create elevated risk for outdoor operations, exposed vehicles, agricultural activities and infrastructure in those areas.
• Aviation operations at airports serving the eastern Florida Peninsula, Central Plains and Midwest face disruption from thunderstorm activity on Thursday (09 April), with delays and cancellations expected at affected hub airports as storm cells develop through the afternoon and evening.
• Heavy rainfall and flash flooding across the eastern Florida Peninsula on Thursday (09 April) present direct disruption to road transport networks, business operations and outdoor activities in and around Miami and Fort Lauderdale, where rainfall totals of three to five inches create conditions for localised flooding of urban areas, underpasses and low-lying routes.
Recommendations:
• Transport and logistics operators are advised to anticipate potential disruptions and consider rerouting strategies where feasible.
• Businesses operating within the affected areas are advised to activate contingency plans for possible disruptions to ensure continuity and workforce safety. Sectors dependent on time-sensitive logistics or outdoor operations may need to adjust schedules.
• It is recommended to monitor updates through the website of NWS (https://www.weather.gov/).
Sources:
• https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=pmdspd
