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THURSDAY, MAY 10, 1990
ONE TROPICAL CYCLONE DEVELOPED OVER THE WESTERN NORTH PACIFIC IN APRIL. LEWIS FORMED AS A TROPICAL DEPRESSION EARLY ON APRIL, 29 ABOUT 830 KILOMETRES SOUTHEAST OF GUAM,
IT INTENSIFIED TO A TROPICAL STORM DURING THE DAY KILOMETRES SOUTHEAST OF GUAM WHILE MOVING NORTHWARDS AT 12 PER HOUR.
ABOUT 760 KILOMETRES
BY THE END OF THE MONTH, LEWIS HAD WEAKENED TO A TROPICAL DEPRESSION AND WAS DRIFTING SLOWLY NORTH-NORTHEASTWARDS ΤΟ THE BAST OF THE MARIANAS ISLANDS.
DUE TO
TO
4.
DURING THE MONTH OF APRIL, NINE AIRCRAFT WERE DIVERTED ADVERSE WEATHER. THUNDERSTORM WARNINGS WERE ISSUED FOR APRIL 1 9 TO 11, 16, 19 AND 23 TO 26. A FLOOD WARNING WAS ISSUED ON APRIL 4.
*
SIGNALS HOISTED DURING THE MONTH WERE AS FOLLOWS:
WEATHER SYSTEM
SIGNAL
DATE AND TIME OF HOISTING
DATE AND TIME OF LOWERING
WINTER
STRONG
APRIL 17
6.05 AM
APRIL 18
7.05 AM
MONSOON
MONSOON
WINTER
STRONG
APRIL 23
10 PM
APRIL 24
5.30 AM
MONSOON
MONSOON
WINTER MONSOON
STRONG MONSOON
APRIL 24
11.25 AM
APRIL 24
2.55 PM
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE:
TOTAL BRIGHT SUNSHINE
MEAN DAILY GLOBAL SOLAR RADIATION
TOTAL RAINFALL
MEAN AMOUNT OF CLOUD
MEAN RELATIVE HUMIDITY
MEAN DAILY MAXIMUM
AIR TEMPERATURE
MEAN AIR TEMPERATURE
73.8 HOURS :
9.59 MJ/SQUARE METRE
46.4 HOURS BELOW NORMAL
4.10 MJ/SQUARE METRE BELOW NORMAL
257.6 MM
118.2 MM ABOVE NORMAL
87 PER CENT
11 PER CENT MORE THAN NORMAL
87 PER CENT
;
4 PER CENT HIGHER THAN NORMAL
23.7 DEGREES CELSIUS
;
1.3 DEGREES CELSIUS BELOW NORMAL
21.4 DEGREES CELSIUS
0.7 DEGREE CELSIUS BELOW NORMAL
/MEAN DAILY
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