As much of the United States grapples with a deadly and perilous deep freeze, it may seem inconceivable that a surge in warmth is anticipated across many regions this week. The Climate Prediction Center projects above-average temperatures throughout the contiguous 48 states, with some areas in the South potentially experiencing highs in the 60s and 70s. UCLA climate scientist Daniel Swain dubs this meteorological phenomenon as “weather whiplash,” as certain parts of the country may witness record high temperatures merely a week or so after enduring record lows.
Despite the welcoming warmth, meteorologists caution that this climatic shift brings the risk of flooding, attributed to a combination of heavy rainfall and rapid snowmelt. The National Water Center’s service coordination hydrologist, Jason Elliott, identifies three regions particularly vulnerable to flooding: the West Coast, the South, and the Ohio Valley/Appalachian regions. He highlights the potential for flooding due to rainstorms, snowmelt, and rising temperatures.
On the West Coast, a plume of moisture is predicted to traverse parts of northern California, generating heavy rain over the weekend. The National Weather Service warns of localized flash flooding, particularly in urban areas, on roads, in small streams, narrow canyons/gullies, and burn scars. Swain points out that the Pacific Northwest is also susceptible to flooding in the coming days due to warm rain falling on existing snow and ice.
AccuWeather forecasters echo concerns about flooding in the South, particularly from central and eastern Texas to western Tennessee. Predicting rainfall amounts of 4-6 inches and locally up to 8 inches, AccuWeather senior meteorologist Joe Lundberg emphasizes the potential for urban and flash flooding, even in drought-affected areas. The combination of substantial rain and warmer temperatures may significantly elevate secondary river levels.
As the warmer air approaches, residents in the South should brace for a dramatic shift in temperatures. Jason Elliott emphasizes that this surge of warmth, coupled with rain, will likely melt the remaining snowpack in the southern regions. Additionally, it may impact the snow cover in the Midwest and Northeast. Weather.com meteorologist Jonathan Erdman adds that the humid air flowing over lingering snowpack could lead to areas of fog and low clouds across the Midwest, South, and East.
The abrupt transition from freezing conditions to unseasonable warmth brings a complex set of challenges, including the potential for flooding, snowmelt, and fog. Residents in flood-prone areas are urged to stay vigilant and take necessary precautions. The unique juxtaposition of weather extremes underscores the dynamic and unpredictable nature of climate patterns, leaving communities to adapt swiftly to the shifting conditions. As the nation experiences this “weather whiplash,” the importance of preparedness and resilience in the face of rapid climatic changes becomes increasingly evident.