NOAA Magazine || NOAA Home Page || Previous Story

AN ACTIVE 2004 ATLANTIC HURRICANE SEASON LIKELY

NOAA satellite image of Tropical Storm Bonnie in the Gulf of Mexico taken at 8:45 a.m. EDT on Aug. 10, 2004.Aug. 10, 2004 — NOAA today reiterated its May 2004 Atlantic Hurricane Season Outlook by calling for 12 to 15 tropical storms, with six to eight becoming hurricanes, and two to four of these becoming major hurricanes (Category 3 or higher on the Saffir-Simpson Hurricane Scale). The Atlantic hurricane season runs from June 1 through November 30; the peak of the season is mid-August through mid-October. (Click NOAA satellite image for larger view of Tropical Storm Bonnie in the Gulf of Mexico taken at 8:45 a.m. EDT on Aug. 10, 2004. Click here for high resolution version, which is a large file. Please credit “NOAA.”)

This year, NOAA hurricane experts predict a 90 percent probability of an above-to-near normal season and only a 10 percent chance of a below-normal season.

NOAA satellite image of Tropical Storm Charly, the third tropical storm of the 2004 Atlantic hurricane season, taken at 8:15 a.m. EDT on Aug. 10, 2004.“Atmospheric patterns and tropical Atlantic sea-surface temperatures are now in place to favor significant hurricane activity this season,” said retired Air Force Brig. Gen. David L. Johnson, director of the NOAA National Weather Service. (Click NOAA satellite image for larger view of Tropical Storm Charley, the third tropical storm of the 2004 Atlantic hurricane season, taken at 8:15 a.m. EDT on Aug. 10, 2004. Click here for high resolution version, which is a large file. Please credit “NOAA.”)

“The main factor influencing the Atlantic hurricane season again this year is the active Atlantic multi-decadal signal, which includes a continuation of warmer-than-normal ocean temperatures across the tropical Atlantic,” said Jim Laver, director of the NOAA Climate Prediction Center. “These patterns are now in place as expected.”

NOAA satellite image of Tropical Storms Bonnie and Charly taken at 9:45 a.m. EDT on Aug. 10, 2004.However, one important factor that is not completely settled this season is the El Niño Southern Oscillation (ENSO) phenomenon, which could suppress hurricane development. NOAA’s latest ENSO Diagnostic Discussion indicates that neutral conditions (neither El Niño nor La Niña) are in place in the tropical Pacific but could evolve into a weak El Niño during the next few months. If a weak El Niño develops, it could reduce late season hurricane activity. (Click NOAA satellite image for larger view of Tropical Storms Bonnie and Charley taken at 9:45 a.m. EDT on Aug. 10, 2004. Click here for high resolution version, which is a large file. Please credit “NOAA.”)

“Whether ENSO-neutral conditions continue or a weak El Niño develops, NOAA expects significant Atlantic tropical storm and hurricane activity again this season,” said Max Mayfield director of the NOAA Tropical Prediction Center - National Hurricane Center. Historically, above-to-near normal seasons have averaged two to three landfalling hurricanes in the continental United States and one to two hurricanes in the region around the Caribbean Sea.

The first named storm of this season was Hurricane Alex, which grazed the Outer Banks of North Carolina on August 3. Tropical Strom Bonnie formed August 9th over the south-central Gulf of Mexico. The NOAA National Weather Service urged interests in the northeastern Gulf of Mexico to closely monitor Bonnie’s progress as the storm is expected to reach hurricane strength over the next few days.

Tropical Storm Charley, the season’s third named storm developed today (August 10th) over the eastern Caribbean. Island Interests in the central and northwestern Caribbean are also monitoring Charley’s progress, particularly Jamaica and the Cayman Islands.

While forecasters have considerable skill in predicting the seasonal activity as a whole, “It’s not currently possible to predict over an entire season whether a given locality will be hit by a hurricane,” said Mayfield. “Therefore, NOAA strongly urges Gulf and Atlantic Coast residents, as well as those living in the Caribbean region, to be prepared.”

“Historically, NOAA’s seasonal hurricane outlooks issued in May have been quite good. The August outlooks tend to be even more accurate because they are issued just prior to the peak of the season,” said Laver. “Improved observations and better understanding by NOAA scientists have led to successful seasonal hurricane outlooks in each of the last five years.”

NOAA scientists are constantly working on “improving tropical cyclone analysis and prediction of individual storms, which also is a goal of the United States Weather Research Program (USWRP),” said Mayfield. “The USWRP Joint Hurricane Testbed helps NOAA apply research, technological and observational advances more rapidly to further improve hurricane forecasting.”

The 2004 Atlantic hurricane outlook is a joint product of scientists at the NOAA Climate Prediction Center, the Hurricane Research Division and the National Hurricane Center. NOAA meteorologists use a suite of sophisticated numerical models and high-tech tools to forecast tropical storms and hurricanes. Scientists rely on information gathered by NOAA and U.S. Air Force Reserve personnel who fly directly into the storms in hurricane hunter aircraft; NOAA, NASA and the U.S. Department of Defense satellites; NEXRAD WSR-88D radars and partners among the international meteorological services.

The NOAA National Weather Service is the primary source of weather data, forecasts and warnings for the United States and its territories. The NOAA Weather Service operates the most advanced weather and flood warning and forecast system in the world, helping to protect lives and property and enhance the national economy.

NOAA is dedicated to enhancing economic security and national safety through the prediction and research of weather and climate-related events and providing environmental stewardship of the nationís coastal and marine resources. NOAA is part of the U.S. Department of Commerce.

Relevant Web Sites
NOAA National Hurricane Center — Get the latest advisories here

NOAA Satellite Services Division — Latest Images

NOAA 3-D Satellite Images

NOAA Enhanced Satellite Images

NOAA Atlantic Hurricanes Database — 150 Years of Atlantic Hurricanes

Above-normal 2004 Atlantic Hurricane Season Predicted

Saffir-Simpson Hurricane Scale


NOAA Flood Products


NOAA Inland Flooding Information

Significant River Flood Outlook

NOAA Rainfall Graphics
24-hour Observed Precipitation as of 8 a.m. today

Latest rainfall data as of 8 a.m. EDT today

NOAA Buoys

NOAA Tides Online

NOAA Satellite Images — The latest satellite views

Colorized Satellite Images

NOAA Hurricanes Page

NOAA Storm Watch — Get the latest severe weather information across the USA

Media Contacts:
Carmeyia Gillis, NOAA Climate Prediction Center, (301) 763-8000 ext. 7163 or Frank Lepore, NOAA Hurricane Center, (305) 229-4404