A very slow moving and intense low pressure system was responsible for strong northwest winds across New Jersey from the evening of the 3rd through the early evening of the 4th. Most of the peak wind gusts averaged 45 to 50 mph.
Peak wind gusts included 53 mph at High Point (Sussex County), 52 mph in Keansburg (Monmouth County), 51 mph at the Atlantic City Marina, 50 mph in Harvey Cedars (Monmouth County), 49 mph in Barnegat (Ocean County), 47 mph at the Atlantic City International Airport, 46 mph in Millville (Cumberland County), Pittstown (Hunterdon County) and Woodstown (Salem County) and 44 mph at Sandy Hook (Monmouth County).
The strong northwest winds began after a cold front moved through the state during the evening on the 3rd. It persisted through the early evening of the 4th until the low pressure system associated with that front moved farther northeast up the Saint Lawrence River Valley and started to weaken.

Strong Wind in MIDDLESEX, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WESTERN MONMOUTH, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 16:00:00 (EST-5)
Magnitude: 45.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Strong Wind in EASTERN ATLANTIC, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 44.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Strong Wind in CUMBERLAND, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 15:00:00 (EST-5)
Magnitude: 40.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in WESTERN ATLANTIC, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 19:00:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in EASTERN MONMOUTH, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in MERCER, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 17:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in EASTERN CAPE MAY, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in GLOUCESTER, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in CAMDEN, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SUSSEX, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 46.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SALEM, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in HUNTERDON, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WARREN, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in MORRIS, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WESTERN CAPE MAY, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in NORTHWESTERN BURLINGTON, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WESTERN OCEAN, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SOUTHEASTERN BURLINGTON, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in EASTERN OCEAN, NEW JERSEY
From 03-APR-09 22:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SOMERSET, NEW JERSEY
From 03-APR-09 23:00:00 to 04-APR-09 18:00:00 (EST-5)
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet