WORLD METEOROLOGICAL ORGANIZATION ________________ RA IV HURRICANE COMMITTEE RA IV/HC-XXXIII/Doc. 4.2(7) (16.II.2011) ______ ITEM 4.2 THIRTY-THIRD SESSION Original: SPANISH GRAND CAYMAN, CAYMAN ISLANDS 8 TO 12 MARCH 2011 REVIEW OF THE PAST HURRICANE SEASON REPORTS OF HURRICANES, TROPICAL STORMS, TROPICAL DISTURBANCES AND FLOODING ASSOCIATED WITH THESE EVENTS DURING 2010 (Submitted by the Dominican Republic) RA IV/HC-XXXIII/Doc. 4.2(7), p. 2 DOMINICAN INSTITUTE OF CIVIL AVIATION NATIONAL METEOROLOGICAL OFFICE Impacts of Hurricane Tomas on the Dominican Republic 2010 Cyclone Season (Submitted by the Dominican Republic) 1. Introduction Although the 2010 cyclone season was quite active in the Atlantic Basin in the Northern Hemisphere, it proved fairly quiet for the Dominican Republic, which was most affected by Hurricane Tomas. This reached the south of our island in the first ten days of December, heading westward, after which it veered north then northeast, passing between the eastern tip of Cuba and Haiti. It produced heavy rainfall only in the southwestern areas, the Cordillera Central mountain range and the western region. There were no casualties. Other particularly noteworthy hurricanes were Earl and Igor, which reached the northeast of the Leeward Islands, moving in a northeasterly direction over the north Atlantic, where they caused abnormal winds and waves along the northern coast of Quisqueya. The Meteorological Service issued warnings to vessels operating off the eastern and northern coasts of the country. 2. Impacts of Hurricane Tomas on the Dominican Republic As can be seen on the map below, the most significant rainfall in the Dominican Republic over a period of seven (7) days was recorded in the southern part of the country, some isolated areas in the east, the northeastern region, and the south, west and southwest. Fig.1.- Map of accumulated rainfall over a period of 168 hours * Note: Sin datos = No data The channel’s infrared satellite image for 10.45 UTC on 5 November 2010 showed large areas of cloud and heavy rain across the whole of the south of the country, eastern and central areas, the southwest, and the entire border region. RA IV/HC-XXXIII/Doc. 4.2(7), p. 3 Fig.2.- Satellite image for 10.45 UTC on 05/11/2010 The Meteorological Service issued warnings and alerts of possible flooding and landslides resulting from the heavy rain, and abnormal conditions, waves and winds along the Caribbean coast, with both tropical storms and hurricane conditions. A warning of tropical storm conditions in the early hours of Saturday, 6 November was issued for Manzanillo Bay westward, including Puerto Plata, as Tomas passed some 160 kilometres northwest of Monte Cristi and some 240 kilometres west/northwest of Puerto Plata. Fig.3.- Map showing the areas for which warnings were issued by the Dominican Republic’s Emergency Operations Centre (COE) The following table shows the accumulated values for each drainage basin and the maximum value recorded for each location. BASIN Yaque del Norte Costa Norte Dajabon Ozama San P. de Macorís Higuey Yuna Miches y S. de la Mar Accumulated value (mm) 611.1 759.5 237.1 1542.0 462.1 210.6 1259.4 272.6 Maximum value and location 115.0 (Monción) 155.4 (A. La Unión, Puerto Plata) 137.8 (Loma de Cabrera) 309.4 (A. Las Americas) 190.7 (La Romana) 87.0 (S. Rafael del Yuma) 204.0 (Villa Riva) 152.2 (Sabana de la Mar) RA IV/HC-XXXIII/Doc. 4.2(7), p. 4 BASIN Bani y San Cristóbal Yaque del Sur Barahona Enrriquillo Artibonito Samana Accumulated value (mm) 1208.8 821.5 370.7 192.1 267.4 384.2 Maximum value and location 258.4 (Azua) 356.8 (Polo) 210.3 (Pedernales) 128.1 (Neyba) 101.4 (El Cercado) 109.6 (A. Catey) According to information from the Dominican Republic’s Emergency Operations Centre (COE), the adverse conditions associated with the passing of Hurricane Tomas were as follows: Abnormal swells and breakers along the Caribbean coast. Traffic problems affecting Avenida 30 de Mayo and Haina; 13,230 people evacuated, and 76 communities without communications, including 40 in Azua, also in Pedernales because of the collapse of the Agüita bridge; A number of bridges collapsed in San Cristóbal; Collapse of the bridge linking Duverge and Neyba. ___________ References: Data from the Dominican Republic’s Emergency Operations Centre. Data archive of the Forecasting Division of the Dominican Republic’s National Meteorology Office. Data from the Climatology Division of the National Meteorology Office. Hydrometeorology Division of the National Meteorology Office.