The Midwest and Great Lakes will start April cooler than normal before those low readings shift to the East later in the month, forecasters said.
Temperatures may be below normal by 3 to 5 degrees Fahrenheit (1.6 to 2.7 Celsius) from Iowa to western New York and lower in parts of North Dakota and Minnesota from April 1 to April 5, said Matt Rogers, president of the Commodity Weather Group LLC in Bethesda, Maryland. More seasonal readings are forecast for parts of the Northeast and South.
"A very active pattern is forecast to affect North America over the next two weeks," Rogers said. "An onslaught of weather systems keeps conditions changing frequently from day to day over the Midwest, East, South and even in the West with pulses of Pacific energy rotating through the flow."
Warm air may move across the country in front of that storm system, changing the forecasts, said Mickey Shuman of Weather Services International in Andover, Massachusetts. Meteorologists aren’t sure whether that system will affect the Northeast.
"Forecast confidence is only about average thanks to the highly changeable, energetic pattern," Shuman wrote in a forecast today.
By April 6-10, temperatures in the East may reach 3 degrees below normal, seasonal in the center of the country and 3 to 5 degrees above normal in the West, Rogers said.
The normal average temperature in New York on April 4 is 49, according to MDA EarthSat Weather in Gaithersburg, Maryland. It’s 44 in Boston, 45 in Chicago, 53 in St. Louis, 67 in Houston and 36 in Calgary.