AGROCLIMATIC INFORMATION FOR AGRICULTURAL PLANNING AND OPERATION IN ILOCOS NORTE PARTICULARLY BATAC AND SURROUNDING AREAS FOR THE MONTH OF OCTOBER

I. AGROCLIMATIC SUMMARY::

Partly cloudy to cloudy skies is the prevalent weather condition in the area. Rainfall amount of 155.6 mm with 7 rainy days and a total evaporation of 132.9 mm are normal values for the month.

Soil moisture condition is moist. Relative humidity is 84%. Leaf wetness duration is from 6 to 12 hours. Daylight duration is 11 hours and 50 minutes with 50% of total bright sunshine. This situation gives an amount of 17.2 MJ/m2 of solar radiation during most days of the month. Northeasterly to variable winds (30.2 kpd) prevail.

Average maximum and minimum air temperature is 32.6 °C and 22.5°C, respectively.

II. AGROCLIMATIC DATA (AVERAGE)::

Decade Rainfall Rainy P(W)* P(TC)** Tot AIR TEMPERATURE RH Solar Wind
(10 Day) (mm) days % % evap. Max. Min. (%) Rad. Speed
          (mm) (°C) (°C)   MJ/m2 (kpd)
October                    
1-10 42.4 3 19 19 43.6 32.5 23.0 84 17.2 25.6
11-20 38.4 2 29 29 42.4 32.7 22.6 84 16.7 33.3
21-31 75.2 2 43 43 46.9 32.6 22.1 84 17.8 32.8

* Probability of wet decade (>50 mm per decade)

** Probability of having a Tropical Cyclone

III. TROPICAL CYCLONE

Listed are tropical cyclones (TC) that crossed and passed Ilocos Norte which registered gusty/strong winds and heavy rains during the month of October from 1981-2006.

TC Name Year and Date Occurrence
T Weling Oct 14-15, 1982
TD Pepang Oct 11-12, 1983
TD Sisang Oct 23, 1983
T Pining Oct 03, 1985
TS Tasing Oct 24, 1985
T Pepang Oct 22-24, 1987
T Rubing Oct 05-06, 1989
T Tasing Oct 14-20, 1989
T Trining Oct 24-30, 1991
T Paring Oct 19-27, 1992
T Kadiang Oct 01-07, 1993
T Husing Oct 28, 1993
T Rosing Oct 31, 1995
T Seniang Oct 12-19, 1996
T Narsing Oct 17-23, 1997
T Iliang Oct 12-16, 1998
T Loleng Oct 20-24, 1998
T Pepang Oct 04-07, 1999
T Reming Oct 30-31, 2000
TD Viring Oct 30-Nov 3, 2003
T Siony Oct 17-19, 2004
T Tonyo Oct 23-24, 2004
TS Neneng Oct 01-05, 2006
TD Ompong Oct 12-13, 2006
T Paeng Oct 27-31, 2006

DAILY RAINFALL PROBABILITY (GRAPH)