An active and volatile weather pattern will develop today and continue through the weekend, with fluctuating high temperatures and waves of showers and thunderstorms.

TODAY

A warm front will move through the region with waves of showers and thunderstorms.  The thunderstorms will be capable of heavy downpours, occasional lightning, and wind gusts over 40 mph.  Winds will veer from the southeast to the southwest at 5 to 15 mph.  High temperatures will range from the lower to mid-60s on Long Island, upper 60s to lower 70s on the coast, and lower to mid-70s elsewhere.

TONIGHT

The cold front will follow with waves of showers and thunderstorms.  The thunderstorms will be capable of heavy downpours, frequent lightning, hail, and wind gusts over 40 mph.  Winds will veer from the southwest to the northwest at 5 to 15 mph.  Low temperatures will range from the mid to upper 40s over the interior, lower to mid-50s in the suburbs, and mid to upper 50s in urban areas.

TOMORROW

The cold front will press to the south with showers lingering in the morning, followed by clearing skies from north to south.  Winds will be from the northwest at 5 to 15 mph.  High temperatures will range from the upper 50s to the lower 60s over the interior and the lower to mid-60s along the coast.

TOMORROW NIGHT

High pressure will pass to the north of the region with scattered clouds.  Winds will veer from the northwest to the northeast at 5 to 15 mph.  Low temperatures will range from the lower to mid-40s over the interior, mid to upper 40s in the suburbs, and upper 40s to lower 50s in urban areas.

SATURDAY

The frontal boundary will lift northward as a warm front with cloudy skies and periods of showers.  Winds will veer from the northeast to the southeast at 5 to 15 mph.  High temperatures will range from the upper 40s to lower 50s over the interior, upper 40s to lower 50s along the coast, and lower to mid-50s in the Delaware River Valley.

SUNDAY

A warm front will lift to the north of the region in the morning with low clouds and scattered showers.  A cold front will follow in the afternoon and evening with scattered showers and thunderstorms.  Winds will veer from the southeast to the southwest at 5 to 15 mph.  Low temperatures will range from the mid to upper 40s over the interior and upper 40s to lower 50s along the coast.  High temperatures will range from the mid-50s to the lower 60s over the higher elevations, mid to upper 60s over the rest of the interior, lower to mid-60s on Long Island, upper 60s to mid-70s along the coast, and mid to upper 70s in the Delaware River Valley.

MONDAY

A series of troughs will produce scattered clouds and isolated showers.  Low temperatures will range from the upper 20s to mid-30s over the interior, mid to upper 30s in the suburbs, and upper 30s to lower 40s in urban areas.  High temperatures will range from the upper 40s to the lower 50s over the interior and the lower to mid-50s along the coast.

TUESDAY

A series of troughs will produce scattered clouds and isolated showers. Low temperatures will range from the lower to mid-30s over the interior and mid to upper 30s along the coast.  High temperatures will range from the mid-30s to the lower 40s over the interior and mid to upper 40s along the coast.

WEDNESDAY

A series of troughs will produce scattered clouds and isolated showers.  Low temperatures will range from the lower to mid-20s over the interior and upper 20s to lower 30s along the coast.  High temperatures will range from the upper 20s to mid-30s over the interior and upper 30s to lower 40s along the coast.

THURSDAY

High pressure will produce scattered clouds.  Low temperatures will range from the lower to mid-20s over the interior and upper 20s to lower 30s along the coast.  High temperatures will range from the lower to mid-40s over the interior and mid to upper 40s along the coast.