NOAA expects an active Atlantic hurricane season, but below-normal Pacific hurricane season
In its 2013 Atlantic hurricane season outlook  issued today, NOAA’s Climate Prediction Center is forecasting an active or extremely active season this year. For the six-month hurricane season, which begins June 1, NOAA’s Atlantic Hurricane Season Outlook says there is a 70 percent likelihood of 13 to 20 named storms (winds of 39 mph or higher), of which 7 to 11 could become hurricanes (winds of 74 mph or higher), including 3 to 6 major hurricanes (Category 3, 4 or 5; winds of 111 mph or higher). These ranges are well above the seasonal average of 12 named storms, 6 hurricanes and 3 major hurricanes.
NOAA’s Climate Prediction Center announced that a below-normal hurricane season is most likely for the Eastern Pacific  this year. The outlook calls for a 55 percent probability of a below-normal season, a 35 percent probability of a near-normal season and a 10 percent probability of an above-normal season. Seasonal hurricane forecasters are calling for a 70 percent chance of 11 to 16 named storms, which includes 5 to 8 hurricanes, of which 1 to 4 are expected to become major hurricanes (Category 3, 4 or 5 on the Saffir-Simpson Hurricane Wind Scale).
NOAA’s Central Pacific Hurricane Center announced that climate conditions point to a below-normal season in the Central Pacific Basin  this year. For 2013, the outlook calls for a 70 percent chance of a below-normal season, a 25 percent chance of a near-normal season, and a 5 percent chance of an above-normal season. We expect 1 to 3 tropical cyclones to affect the central Pacific this season. An average season has 4 to 5 tropical cyclones, which include tropical depressions, tropical storms, and hurricanes. The outlook for a below-normal season is based upon the continuation of neutral El Niño–Southern Oscillation conditions. The Central Pacific Basin also remains on the low activity side of a multi-decadal cycle. Historical records show that this combination of conditions tends to produce a less active hurricane season for the central Pacific.