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Current Details from the Joint Typhoon Warning Center Current Details from the Joint Typhoon Warning Center COORDINATES: 19.8° north, 87.6° east LOCATION: 390 kilometers (245 miles) south-southwest of Kolkata, India MOVEMENT: north-northeast at 17 kph (10 mph) WINDS: 175 kph (110 mph) with gusts to 210 kph (130 mph) RADIUS OF TROPICAL STORM-FORCE WINDS: 370 kilometers (230 miles) RADIUS OF HURRICANE-FORCE WINDS: 85 kilometers (50 miles) SAFFIR-SIMPSON SCALE RANKING*: Category 2 FORECAST LANDFALL LOCATION: south of Kolkata, India FORECAST LANDFALL TIMEFRAME: Wednesday afternoon or evening local time Latest Satellite Picture Source: University of Wisconsin (CIMSS) Discussion Cyclone Amphan, located approximately 390 kilometers (245 miles) south-southwest of Kolkata, India, is currently tracking north-northeast at 17 kph (10 mph). Satellite imagery indicates that despite nearing landfall, the cyclone has generally maintained its overall symmetric core in the last few hours. However, the central dense overcast feature over the storm’s center has started to erode on the northeast side and the system is looking a bit more ragged. An eye feature does remain prevalent on high resolution microwave satellite scans. The JTWC has set an initial intensity at 175 kph (110 mph); 1-minute sustained average. This makes Amphan a strong Category 2-equivalent storm on the Saffir-Simpson Hurricane Wind Scale, and still very potent. The overall atmospheric environment is growing increasingly hostile as moderate wind shear is starting to more prominently affect the storm’s overall appearance. The system continues to track north- northeastward along the western periphery of a steering ridge of high pressure located well to the east, and this motion is likely to persist through the rest of Amphan’s life cycle. As noted, wind shear has begun to take its toll on the system and this trend is expected to continue during the next 12 hours. Some additional weakening is probable prior to landfall just south of Kolkata, India at approximately 12:00 UTC (5:30 PM local time). Rapid dissipation is anticipated as the storm comes ashore, with frictional effects of land and further wind shear erodes the storm’s core. The forecast model guidance is in excellent agreement, lending high confidence in the JTWC track. Cat Alert: Cyclone Amphan 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 landfall is imminent and rapid weakening over land is anticipated after coming ashore, this is the final Cat Alert. Full details will be found in this week’s Weekly Cat Report. Cat Alert: Cyclone Amphan 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: Cyclone Amphan 4 About Aon Aon plc (NYSE:AON) is a leading global professional services firm providing a broad range of risk, retirement and health solutions. Our 50,000 colleagues in 120 countries empower results for clients by using proprietary data and analytics to deliver insights that reduce volatility and improve performance. © Aon plc 2020. All rights reserved. The information contained herein and the statements expressed are of a general nature and are not intended to address the circumstances of any particular individual or entity. Although we endeavor to provide accurate and timely information and use sources we consider reliable, there can be no guarantee that such information is accurate as of the date it is received or that it will continue to be accurate in the future. No one should act on such information without appropriate professional advice after a thorough examination of the particular situation. Copyright © by Impact Forecasting® No claim to original government works. The text and graphics of this publication are provided for informational purposes only. While Impact Forecasting® has tried to provide accurate and timely information, inadvertent technical inaccuracies and typographical errors may exist, and Impact Forecasting® does not warrant that the information is accurate, complete or current. The data presented at this site is intended to convey only general information on current natural perils and must not be used to make life-or-death decisions or decisions relating to the protection of property, as the data may not be accurate. Please listen to official information sources for current storm information. This data has no official status and should not be used for emergency response decision-making under any circumstances. Cat Alerts use publicly available data from the internet and other sources. Impact Forecasting® summarizes this publicly available information for the convenience of those individuals who have contacted Impact Forecasting® and expressed an interest in natural catastrophes of various types. To find out more about Impact Forecasting or to sign up for the Cat Reports, visit Impact Forecasting’s webpage at impactforecasting.com. Copyright © by Aon plc. All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise. Impact Forecasting® is a wholly owned subsidiary of Aon plc. Cat Alert: Cyclone Amphan 5 .
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