Central America & Hispaniola Briefing 16 August 2011 Tropical Storm Gert

This Week: Past Week: TRMM Rainfall

From August 9 – August 15, 2011 Santa Ana = 63 mm San Jose = 75.2 mm San Salvador = 68.5 mm David = mm Soto Cano AB= mm Santiago = mm

This Week: Past Week: TRMM Weekly Anomalies Average rain across Hispaniola Above-average rain over northern Central America

This Week: Past Week: TRMM 30-day Anomalies Rainfall surpluses continue over much of Haiti Widespread surpluses over northern Central America. Below- average rain over Costa Rica

TRMM Primera Season Anomalies Anomaly (mm) Percent Normal (%) TRMM August Anomalies

Dekadal WRSI: CA 3 rd dekad of July 1 st dekad of August Similar conditions during first dekad of August as 3 rd Dekad of July.

Dekadal Soil Water Index: CA Overall, good SWI values across Central America Stress/Wilting values expand over drier areas in Honduras and bordering Nicaragua. 3 rd dekad of July 1 st dekad of August

Dekadal WRSI and SWI: Haiti Dryness continues across northwestern Haiti. 3 rd dekad of July 1 st dekad of August

NDVI anomalies

Active Tropics -Invest area 93L: Tropical convection weakened over last 24 hrs. Expected to track westward bringing heavy rain showers to Puerto Rico and the lesser Antilles. -Some models begin to develop the system close to Honduras/Nicaragua before taking it through Belize and the Yucatan Peninsula during the weekend -20% chance of developing into cyclone in next 48 hours -Invest area 99e: Brought heavy rain showers to Pacific coast of Guatemala and Mexico. Expected to track West Northwest. 70% chance of developing into a cyclone in next 48 hours 99e 93L

L

Moderate to heavy rainfall across Central America Light to moderate rain expected over Hispaniola Several tropical areas of interest over the next week potentially affecting Central America and Hispaniola