rt23.com - North Jerseys Internet Magazine North Jerseys Internet Magazine
Weather Map
NWS Radar Map for New Jersey

 

PEQUANNOCK RIVER CONDITIONS

Pequannock River - Macopin Intake Dam, West Milford, NJ, USGS Current Data at 19:15 EDT 05-24-2013
Height: 4.32 feet Flow: 388 ft3/sec Temperature: 17.8 °C (64.04°F)

updated: 818 PM EDT FRI MAY 24 2013
TONIGHT
  OCCASIONAL SHOWERS. COOLER WITH LOWS IN THE LOWER 40S.  NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS UP TO 25 MPH. CHANCE OF RAIN  80 PERCENT.
SATURDAY
  MOSTLY CLOUDY. SHOWERS LIKELY IN THE MORNING...THEN A  CHANCE OF SHOWERS WITH ISOLATED THUNDERSTORMS IN THE AFTERNOON.  BREEZY WITH HIGHS IN THE UPPER 50S. NORTHWEST WINDS 15 TO 20 MPH.  GUSTS UP TO 30 MPH...INCREASING TO 40 MPH IN THE AFTERNOON. CHANCE  OF RAIN 70 PERCENT.
SATURDAY NIGHT
  MOSTLY CLOUDY. A CHANCE OF SHOWERS WITH ISOLATED  THUNDERSTORMS IN THE EVENING...THEN A SLIGHT CHANCE OF SHOWERS AFTER  MIDNIGHT. BREEZY WITH LOWS IN THE LOWER 40S. NORTHWEST WINDS 15 TO  20 MPH. GUSTS UP TO 40 MPH...DECREASING TO 25 MPH AFTER MIDNIGHT.  CHANCE OF RAIN 40 PERCENT.
SUNDAY
  MOSTLY SUNNY AND BREEZY. HIGHS IN THE MID 60S. NORTHWEST  WINDS 15 TO 20 MPH WITH GUSTS UP TO 30 MPH.
SUNDAY NIGHT
  MOSTLY CLEAR. LOWS AROUND 40. NORTHWEST WINDS 10 TO  15 MPH...BECOMING WEST AROUND 5 MPH AFTER MIDNIGHT.
MEMORIAL DAY
  SUNNY. HIGHS IN THE LOWER 70S.
MONDAY NIGHT
  MOSTLY CLEAR. LOWS IN THE LOWER 40S.
TUESDAY
  MOSTLY SUNNY. HIGHS IN THE LOWER 70S.
TUESDAY NIGHT
  MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE  LOWER 50S. CHANCE OF RAIN 30 PERCENT.
WEDNESDAY
  PARTLY SUNNY IN THE MORNING...THEN BECOMING MOSTLY  CLOUDY. A CHANCE OF SHOWERS. HIGHS IN THE MID 70S. CHANCE OF RAIN  30 PERCENT.
WEDNESDAY NIGHT
  MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE  EVENING. LOWS IN THE MID 50S. CHANCE OF RAIN 30 PERCENT.
THURSDAY
  PARTLY SUNNY. HIGHS IN THE LOWER 80S.
THURSDAY NIGHT
  MOSTLY CLOUDY. LOWS IN THE UPPER 50S.
FRIDAY
  MOSTLY SUNNY. HIGHS IN THE LOWER 80S.


Join Our Mailing List
Keep informed about North Jersey happenings!
E-Mail:


Doppler Radar Map for New Jersey

This is the latest Doppler Radar Map for New Jersey from the National Weather Service. This image is generated at the National Weather Service's Mount Holly, New Jersey station by NEXRAD.

NEXRAD (Next Generation Radar) obtains weather information (precipitation and wind) based upon returned energy. The radar emits a burst of energy (green). If the energy strikes an object (rain drop, bug, bird, etc), the energy is scattered in all directions (blue). A small fraction of that scattered energy is directed back toward the radar. This reflected signal is then received by the radar during its listening period. Computers analyze the strength of the returned pulse, time it took to travel to the object and back, and phase shift of the pulse. This process of emitting a signal, listening for any returned signal, then emitting the next signal, takes place very fast, up to around 1300 times each second.

NEXRAD spends the vast amount of time "listening" for returning signals it sent. When the time of all the pulses each hour are totaled (the time the radar is actually transmitting), the radar is "on" for about 7 seconds each hour. The remaining 59 minutes and 53 seconds are spent listening for any returned signals. The ability to detect the "shift in the phase" of the pulse of energy makes NEXRAD a Doppler radar. The phase of the returning signal typically changes based upon the motion of the raindrops (or bugs, dust, etc.).

This Doppler effect was named after the Austrian physicist, Christian Doppler, who discovered it. You have most likely experienced the "Doppler effect" around trains. As a train passes your location, you may have noticed the pitch in the train's whistle changing from high to low. As the train approaches, the sound waves that make up the whistle are compressed making the pitch higher than if the train was stationary. Likewise, as the train moves away from you, the sound waves are stretched, lowering the pitch of the whistle. The faster the train moves, the greater the change in the whistle's pitch as it passes your location. The same effect takes place in the atmosphere as a pulse of energy from NEXRAD strikes an object and is reflected back toward the radar. The radar's computers measure the phase change of the reflected pulse of energy which then convert that change to a velocity of the object, either toward or from the radar. Information on the movement of objects either toward or away from the radar can be used to estimate the speed of the wind. This ability to "see" the wind is what enables the National Weather Service to detect the formation of tornados which, in turn, allows them to issue tornado warnings with more advanced notice.


Astronomy Doppler Radar Map

 

Untitled Document

HomeSceneryHistoryRecreationHome & GardenDirectoryCalendarClassified AdsMapsSceneryShopping
Advertise on rt23.com!Link to rt23.com!

Custom Search

Questions, comments, corrections? contact the Webmaster

©1999-2008 Ardan Scientific Programming, L.L.C.

1941