16
AS THE NORTHEAST MONSOON WENT INTO A
SATURDAY, APRIL 13, 1991
LULL, CONDITIONS BECAME FOG AFFECTED THE HARBOUR
WARM AND HUMID ON MARCH 20 AND 21. DENSE AREA IN THE MORNING OF MARCH 21 BEFORE LIFTING DURING THE DAY.
THE HARBOUR AREA WAS RELATIVELY
A COLD ASSOCIATED WITH
HOWEVER, THE NEXT MORNING,
CLOUDS FREE OF FOG WHILE RAIN GUANGDONG EDGED TOWARDS THE COAST.
FRONT OVER
THAT MORNING, FOLLOWED BY AN THE SKY TURNED OVERCAST LATER
ACCOMPANIED OUTBREAK OF HEAVY RAIN SHORTLY AFTER MIDDAY. THE RAIN WAS
OF THE BY SOME THUNDERSTORMS WHICH MAINLY AFFECTED THE NORTHERN PART NEW TERRITORIES.
SOME AS A RESULT OF THE INCLEMENT WEATHER AND POOR VISIBILITY,
AND THE CENTRAL
OUTLYING ISLANDS WERE HYDROFOIL SERVICES BETWEEN TEMPORARILY SUSPENDED, AND AIR TRAFFIC WAS ALSO AFFECTED.
AND 24, BUT THE RAIN
THE WEATHER STAYED CLOUDY ON MARCH 23
THE RETURN OF A MOIST MARITIME LESS FREQUENT. BECAME LIGHT AND AIRSTREAM BROUGHT BACK THE WARM AND MISTY WEATHER WITH FOR THE NEXT THREE DAYS. FOG INSIDE THE HARBOUR WAS MORNING PERIODS, BUT WAS MORE PERSISTENT OFFSHORE.
SOME SUNSHINE CONFINED ΤΟ THE
FRONT ON MARCH 28 THE APPROACH OF ANOTHER COLD WEATHER TO TURN CLOUDY AGAIN WITH PATCHES OF LIGHT RAIN.
FOLLOWED BY HEAVIER IN THE MORNING OF MARCH 30 AND WAS SURGE OF THE MONSOON.
CAUSED THE RAIN BECAME A NORTHERLY
WINDS BECAME STRONG ON MARCH 31 WITH TEMPERATURE DROPPING TO MINIMUM OF 11.9 DEGREES, THE LOWEST FOR THE MONTH.
A
NORTH PACIFIC ADVERSE WEATHER.
31. THE YELLOW
TWO TROPICAL CYCLONES OCCURRED OVER THE WESTERN DURING THE MONTH. SIX AIRCRAFT WERE DIVERTED DUE TO THUNDERSTORM WARNINGS WERE IN EFFECT ON MARCH 22 AND FIRE DANGER WARNING WAS IN EFFECT ON MARCH 10 AND 17.
WEATHER
SYSTEM
SIGNALS HOISTED DURING THE MONTH WERE AS FOLLOWS:
SIGNAL
DATE & TIME OF HOISTING
DATE & TIME OF LOWERING
WINTER
STRONG
MONSOON
MONSOON
WINTER
MONSOON
S'TRONG MONSOON
MARCH 14 3.30 PM
MARCH 31 4.05 PM
MARCH 15 7.30 AM
APRIL 1 7.30 AM
THE MONTH'S FIGURES AND DEPARTURES FROM NORMAL WERE:
TOTAL BRIGHT SUNSHINE
MEAN DAILY GLOBAL SOLAR RADIATION
TOTAL RAINFALL
MRAN AMOUNT OF CLOUD
75.6 HOURS; 20.8 HOURS BELOW NORMAL
8.91 MJ/SQ. METRE; 2.33 MJ/SQ. METRE BELOW
NORMAL
51.5 MM ; 15.4 MM BELOW NORMAL
81 PER CENT; FIVE PER CENT MORE THAN
NORMAL
/MEAN RELATIVE