La Niña dissipated during the month of April as below average sub-surface temperatures largely disappeared and above average sub-surface temperatures expanded in both the central and eastern Pacific. The current and evolving conditions, combined with model forecasts, suggest La Niña is unlikely to redevelop later this year

A late-season storm system will bring several inches of snow to portions of the northern Rockies through Saturday. Elevations above 5000 feet could see up to 8 inches of wet, heavy snow, and that could be damaging to leafy vegetation and power lines. Winter Weather Advisories are in effect through Saturday for portions of central Idaho, western Montana and northwest Wyoming.

Thunderstorms with heavy rain impacted southern Kansas, northern Oklahoma and southwest Missouri Sunday night into Monday morning, with six or more inches of accumulation.

Temperatures will once again drop into the 20s to around 30 degrees across the southern New England and northern Mid-Atlantic states. Significant damage to tender vegetation is possible. In many areas, tender plants and crops could be killed, especially with the advanced season from the record warm March.

Temperatures through early Sunday morning will range from the lower 20s to around 30 degrees across the Great Lakes, northern Mid-Atlantic and southern New England states. The primary impact from the cold temperatures will be damage to unprotected sensitive vegetation, including fruit trees that have already bloomed

A winter storm will continue to impact the northern Rockies through Saturday, particularly portions of western and central Montana, where Winter Storm Warnings are in effect.

The threat of river flooding is increasing over parts of northern Idaho, eastern Washington, western Montana, and northeastern Oregon. Extensive lowland flooding and a few road closures can be expected, with some homes threatened

Approximately 156 record high temperatures were set on Sunday across the western U.S. and several more are likely to be set on Monday

The first ever National Severe Weather Preparedness Week is April 22 – 28.

A storm system in the eastern Gulf of Mexico will merge and move northeast along a stationary front on the East Coast. As the disturbance intensifies, widespread light to moderate rain will develop over the Mid-Atlantic on Sunday and shift into New England on Monday.