Counting pulses

Thanks folks, here is the fully and updated code - currently it is reporting about 250 pulses each time with the anemometer staionary - I guess the IF loop is firing the false interrupts?

#include <PinChangeInt.h>
#define PIN1 7
volatile float WindSpeed = 0;
volatile int wPulse=0;
unsigned long currentTime;
unsigned long loopTime;

void setup() 
{
  Serial.begin(9600);
  Serial.println("Starting...");
  pinMode(PIN1, INPUT);
  digitalWrite(PIN1, HIGH);
  delay(1000);  
}

void loop()
{
  reportAnemometer();  
  delay(5000); 
}

void reportAnemometer()
{
  currentTime = millis();
  loopTime=(currentTime+5000);
  if(currentTime <= loopTime)
  {attachInterrupt(PIN1, &windPulse, RISING);
}
  else
  {detachInterrupt(PIN1);
   loopTime=0;}
  
  WindSpeed = (wPulse/ 5) * 2.4; //2.4 K/h for one switch closure per second
  Serial.print("wPulse: ");
  Serial.println(wPulse);
  Serial.print("WindSpeed: ");
  Serial.println(WindSpeed);
  wPulse=0;
  WindSpeed=0;
}

  void windPulse()
{
  wPulse ++;
}