Wednesday, July 15, 2009

Weather Update Dissemination for Bacolod City

Tropical Depression ISANG (91W) consolidating over the Philippine Sea...tracking Northwestward...outermost rain bands spreading across Eastern Visayas and Coastal Bicol Region.

Forecast Outlook:
ISANG is expected to continue tracking towards the WNW to NW across the warm waters of the Philippine Sea. The 2 to 3-day medium range forecast shows ISANG passing about 250 to 350 km. to the east of Bicol Region late tonight and shall be about 200 km. to the east of Cagayan early Friday morning July 17. This system is expected to attain Tropical Storm status later today or early tomorrow.

+ Effects: ISANG's circulation continues to consolidate as it started to expand...Its outermost bands spreading across Eastern Visayas and the coastal areas of Eastern Bicol Region...Cloudy skies, possible light to moderate to sometimes heavy rains with squalls and thunderstorms can be expected along these bands. 1-day rainfall accumulations of 150 up to 250 mm can be expected along the storm's rain bands...with isolated accumulations of up to 300 mm near the center of ISANG.

People living around the slopes of Mayon Volcano in Albay & of Bulusan Volcano in Sorsogon - especially along the areas where possible MUDFLOWS (LAHAR) FLOWS (mixture of volcanic mud and water) are located must stay alert as moderate to heavy rains associated by this system are likely to affect the area today.

Rip Currents or Rip Tides can be expected along the beach-front areas of Western Luzon & Western Visayas.

+ Current SW Monsoon Intensity: WEAK
Partly sunny to Cloudy skies w/ light to moderate occasional rains, thunderstorms, squalls and moderate SW winds not exceeding 30 kph can be expected over the following affected areas: CALAMIAN GROUP AND PALAWAN.
Possible landslides, mudslides, mudflows (lahars) and life-threatening flash floods are likely to occur along steep mountain/volcanic slopes, river banks, low-lying & flood-prone areas of the affected areas.

Location of Center: 11.5º N Lat 130.2º E Lon
Distance 1: 525 km (283 nm) East of Borongan, E.Samar
Distance 2: 802km E of Bacolod City
MaxWinds (10-min avg): 55 kph (30 kts) near the centerPeak Wind Gusts: 70 kph (38 kts)

+ Tropical Cyclone Watch: (1) Tropical Disturbance 94W (LPA) west of Luzon remains weak over the South China Sea...currently located near lat 16.4N lon 115.7E...or about 495 km WNW of Dagupan City...with 1-min maximum sustained winds of 30 kph...drifting WNW slowly while embedded within the broad Monsoon Trough (ITCZ). Flooding over the hazard risk areas of Cagayan is likely during the next 6 to 12 hours.