Current Details from the Joint Typhoon Warning Center COORDINATES: 12.2° north, 126.2° east LOCATION: 630 kilometers (390 miles) east-southeast of Manila, Philippines MOVEMENT: west at 15 kph (9 mph) WINDS: 175 kph (110 mph) with gusts to 210 kph (130 mph) RADIUS OF TROPICAL STORM-FORCE WINDS: 120 kilometers (75 miles) RADIUS OF HURRICANE-FORCE WINDS: 30 kilometers (20 miles) SAFFIR-SIMPSON SCALE RANKING*: Category 2 FORECAST LANDFALL LOCATION: Samar Island, Visayas, Philippines FORECAST LANDFALL TIMEFRAME: Thursday afternoon or evening local time Latest Satellite Picture Source: Colorado State University (RAMMB) Discussion Typhoon Vongfong, located approximately 630 kilometers (390 miles) east-southeast of Manila, Philippines, is currently tracking west at 15 kph (9 mph). Animated satellite imagery indicates that the intensification trend of Vongfong has stalled, as the eye feature has become more ragged and started to partially fill. The cyclone has continued to track nearly due westward, with the JTWC anticipating landfall on Eastern Samar Island (part of the Visayas Island group) within the next few hours. An upper level atmospheric feature located across the South China Sea is likely amplifying a ridge of high pressure located to the north a bit more than previously forecast. This has led to Vongfong tracking further westward. A recent high-resolution satellite scan showed that the southern portion of the storm’s center has started to degrade. Given some of these parameters, the JTWC has lowered the initial intensity to 175 kph (110 mph); 1-minute average sustained winds, or Category 2 on the Saffir-Simpson Hurricane Wind Scale. The typhoon is expected to gradually shift on a west to west-northwest track, and later northwest, during the next 24-36 hours. A more northerly component will begin as the steering currents change and the steering ridge of high pressure recedes east. Given the due westward motion in the last few hours, the JTWC track has shifted further west. After landfall on Samar Island, Vongfong should further round the ridge and shift more northward. Given current proximity to land, little additional intensification is expected in the few hours prior to landfall. A slow weakening trend is forecast as the storm travels over the archipelago. A more pronounced weakening trend is expected to begin in roughly 24-36 hours as Vongfong tracks over Luzon Island. The official JTWC forecast track is now more aligned with the overall model consensus, though uncertainty persists around when the northerly component will begin. After 72 hours, the typhoon will begin to recurve towards the northeast after it re-emerges into the Luzon Strait. However, the combination of increasing vertical wind shear and cooler sea surface temperatures will cause additional steady weakening by Day 4 and Day 5. At the end of the forecast period, it is likely that an extratropical transition will begin. There remains a large spread in the model guidance, which suggests low confidence in this portion of the JTWC track. Cat Alert: Typhoon Vongfong 2 Joint Typhoon Warning Center Forecast Additional Information and Update Schedule Wind intensity forecasts and forecast track information can be found via the Joint Typhoon Warning Center at https://metocph.nmci.navy.mil/jtwc.php NEXT CAT ALERT: Since gradual weakening is expected following landfall, this will be the final Cat Alert. Additional details can be found in this week’s Weekly Cat Report, plus further updates in following weekly updates as needed. Cat Alert: Typhoon Vongfong 3 *Tropical Cyclone Intensity Classifications for Global Basins WIND SPEED BASINS AND MONITORING BUREAU NE NW NW SW Australi SW North Pacific, Pacific Pacific Pacific a Indian Indian Atlantic 1 1 1 KTS MPH KPH Joint Fiji India National Typhoon Japan Bureau Of Meteorologica Meteo-France Meteorologica Hurricane Warning Meteorological Meteorology l Service (MF) l Department Center (NHC) Center Agency (JMA) (BOM) (FMS) (IMD) (JTWC) Tropical Tropical Tropical Tropical Tropical Tropical Deep 30 35 55 Depressio Depressio Depressio Depression Depression Low Depression n n n 35 40 65 Cat. 1 Cat. 1 Moderate Tropical Cyclonic 40 45 75 Tropical Tropical Tropical Storm Storm Cyclone Cyclone Storm 45 50 85 Tropical Tropical Storm Storm 50 60 95 Severe Cat. 2 Cat. 2 Severe Severe 55 65 100 Tropical Tropical Tropical Tropical Cyclonic Storm Cyclone Cyclone Storm Storm 60 70 110 65 75 120 70 80 130 Cat. 1 Cat. 3 Cat. 3 Hurricane Severe Severe Tropical 75 85 140 Tropical Tropical Cyclone Cyclone Cyclone 80 90 150 85 100 160 Very Cat. 2 Severe 90 105 170 Hurricane Cyclonic Cat. 4 Cat. 4 Storm 95 110 175 Typhoon Severe Severe Tropical Tropical 100 115 185 Intense Cyclone Cyclone Tropical 105 120 195 Cat. 3 Typhoon Cyclone Major 110 125 205 Hurricane 115 130 210 120 140 220 Cat. 5 Cat. 5 125 145 230 Cat. 4 Severe Severe Major Tropical Tropical Very 130 150 240 Hurricane Super Cyclone Cyclone Intense Cyclonic Tropical 135 155 250 Storm Super Cyclone Typhoon 140 160 260 Cat. 5 Major >140 >160 >260 Hurricane Cat Alert: Typhoon Vongfong 4 About Aon Aon plc (NYSE:AON) is a leading global professional services firm providing a broad range of risk, retirement and health solutions. 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