11
SUNDAY, JULY 12, 1987
STORM
12
SPERRY DEVELOPED OVER THE PACIFIC ON JUNE 27 ABOUT 250 KM NORTH-NORTHWEST OF THE ISLAND OF YAP. IT INTENSIFIED ΤΟ A TROPICAL
ABOUT
HOURS AFTER FORMATION AND MOVED STEADILY NORTH-NORTHWESTWARDS. ON THE MORNING OF JUNE 29,IT FURTHER INTENSIFIED INTO A SEVERE TROPICAL STORM. SPERRY TURNED NORTHERLY TRACK EARLY ON JUNE 30 WHEN THE CENTRE WAS ABOUT 370 THE EAST OF OKINAWA. SHORTLY AFTERWARDS IT WEAKENDED INTO A TROPICAL STORM.
ON A KM TO
DUE
DURING THE MONTH, 12 AIRCRAFT WERE DIVERTED FROM HONG KONG TO ADVERSE WEATHER. THUNDERSTORM WARNINGS WERE ISSUED ON JUNE 1, 4, 5, 6 AND 7. FLOOD WARNINGS WERE ISSUED ON JUNE 4 AND 19.
THE ONLY SIGNAL HOISTED DURING THE MONTH WAS AS FOLLOWS:
WEATHER SYSTEM
SIGNAL
DATE AND TIME OF HOISTING
DATE AND TIME OF LOWERING
TROPICAL STORM
RUTH
JUNE 18 3.45 PM
JUNE 19 11.15 AM
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE:
SUNSHINE
147.8 HOURS
11.4 HOURS BELOW NORMAL
GLOBAL SOLAR RADIATION
RAINFALL
CLOUDINESS
15.09 MJ/SQM: 1.66MJ/SQM BELOW NORMAL
231.2 MM ; 200.6 MM BELOW NORMAL
77%; 2% MORE THAN NORMAL
82% 2% LOWER THAN NORMAL.
29.7 DEGREES CELSIUS; 0.7 DEGREE CELSIUS BELOW
NORMAL
27.5 DEGREES CELSIUS: 0.2 DEGREE CELSIUS BELOW
NORMAL
25.8 DEGREES CELSIUS; 0.2 DEGREE CELSIUS ABOVE
NORMAL
24.1 DEGREES CELSIUS; 0.4 DEGRER CELSIUS BELOW
NORMAL
119.9 MM; 28.8 MM BELOW NORMAL,
RELATIVE HUMIDITY
MEAN MAXIMUM
TEMPERATURE
MEAN
TEMPERATURE
MEAN MINIMUM
TEMPERATURE
MEAN DEW POINT
TOTAL EVAPORATION
C
©
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