THE TROPICAL WEATHER OUTLOOK IS ISSUED FOUR TIMES A DAY DURING THE HURRICANE SEASON--AT 530 AM, 1130 AM, 530 PM AND 1030 PM EASTERN TIME. IT BRIEFLY DESCRIBES SIGNIFICANT AREAS OF DISTURBED WEATHER AND THEIR POTENTIAL FOR TROPICAL STORM FORMATION ACROSS THE ENTIRE NORTH ATLANTIC BASIN, WHICH INCLUDES THE GULF OF MEXICO AND CARIBBEAN SEA. THE TROPICAL WEATHER OUTLOOK IS ISSUED UNDER THE WMO HEADER ABNT20 KNHC AND UNDER AWIPS HEADER MIATWOAT.

A SEPARATE PRODUCT, THE SPECIAL TROPICAL DISTURBANCE STATEMENT, MAY BE ISSUED AT ANY TIME TO DESCRIBE STRONG, FORMATIVE WEATHER SYSTEMS THAT HAVE NOT YET REACHED TROPICAL DEPRESSION STATUS. THE SPECIAL TROPICAL DISTURBANCE STATEMENT IS ISSUED UNDER THE WMO HEADER WONT41 KNHC AND UNDER AWIPS HEADER MIADSAAT.

A STANDARD PACKAGE OF PRODUCTS, CONSISTING OF THE TROPICAL CYCLONE PUBLIC ADVISORY, THE FORECAST/ADVISORY, THE CYCLONE DISCUSSION, AND THE STRIKE PROBABILITIES, IS ISSUED EVERY SIX HOURS FOR ALL ONGOING TROPICAL CYCLONES. THESE PRODUCTS ARE AVAILABLE FROM THE PRECEDING WEB PAGE (http://www.srh.noaa.gov/tlh/tropical/) WITH ALTERNATE LINKS AT http://www.srh.noaa.gov/tropicalwx/ AND http://www.nhc.noaa.gov/index.shtml. IN ADDITION, A SPECIAL ADVISORY PACKAGE AY BE ISSUED AT ANY TIME TO ADVISE OF SIGNIFICANT UNEXPECTED CHANGES, OR TO MODIFY WATCHES OR WARNINGS. WHEN WATCHES OR WARNINGS ARE ISSUED, INTERMEDIATE TROPICAL CYCLONE PUBLIC ADVISORIES ARE ISSUED 3 HOURS AFTER EACH COMPLETE ADVISORY PACKAGE. WHEN A STORM OR HURRICANE IS APPROACHING LANDFALL, THE INTERMEDIATE ADVISORIES MAY BE ISSUED EVERY TWO HOURS.

TROPICAL CYCLONE PUBLIC ADVISORIES ARE ISSUED UNDER THE WMO HEADER WTNT3X KNHC AND UNDER AWIPS HEADER MIATCPATX. THE "X" IN BOTH HEADERS IS A NUMBER BETWEEN 1 AND 5 INCLUSIVE, WHICH INCREMENTS BY ONE FOR EACH SUCCESSIVE SYSTEM. AFTER THE FIFTH TROPICAL CYCLONE OF THE SEASON, THE NUMBERING REVERTS TO ONE. FOR EXAMPLE, ADVISORIES FOR THE SIXTH CYCLONE WOULD HAVE A WMO HEADER OF WTNT31 KNHC WITH AN AWIPS HEADER OF MIATCPAT1. THE OTHER THREE PRODUCTS IN THE STANDARD PACKAGE USE THE SAME NUMBERING CONVENTION. TROPICAL CYCLONE FORECAST/ADVISORIES ARE ISSUED UNDER THE WMO HEADER WTNT2X KNHC AND UNDER AWIPS HEADER MIATCMATX. TROPICAL CYCLONE DISCUSSIONS ARE ISSUED UNDER THE WMO HEADER WTNT4X KNHC AND UNDER AWIPS HEADER MIATCDATX. FINALLY, THE STRIKE PROBABILITIES ARE ISSUED UNDER THE WMO HEADER WTNT7X KNHC AND UNDER AWIPS HEADER MIASPFATX.

AN ADDITIONAL PRODUCT IS THE TROPICAL CYCLONE UPDATE. THE TROPICAL CYCLONE UPDATE IS A BRIEF STATEMENT TO INFORM OF SIGNIFICANT CHANGES IN A TROPICAL CYCLONE, OR TO POST OR CANCEL WATCHES OR WARNINGS. IT IS USED IN LIEU OF, OR TO PRECEDE, THE ISSUANCE OF A SPECIAL ADVISORY PACKAGE. TROPICAL CYCLONE UPDATES, WHICH CAN BE ISSUED AT ANY TIME, CAN BE FOUND UNDER WMO HEADER WTNT61 KNHC, AND UNDER AWIPS HEADER MIATCUAT.

THE MONTHLY TROPICAL WEATHER SUMMARY IS ISSUED ON THE FIRST OF EACH MONTH DURING HURRICANE SEASON. IT SUMMARIZES THE DEVELOPMENT AND EVOLUTION OF ANY TROPICAL CYCLONES THAT DEVELOPED DURING THE PREVIOUS MONTH. IT ALSO BRIEFLY DUSCUSSES ANY DAMAGE, INJURIES, OR DEATHS ATTRIBUTED TO THESE STORMS.

THE TROPICAL WEATHER DISCUSSION IS ISSUED YEAR-ROUND AND DESCRIBES FEATURES OF NOTE ACROSS THE ENTIRE NORTH ATLANTIC BASIN. IN ADDITION TO DESCRIBING ANY EXISTING TROPICAL CYCLONES, THE PRODUCT ADDRESSES TROPICAL WAVES, THE ITCZ, SYNOPTIC SCALE FEATURES AT THE SURFACE AND MID AND UPPER LEVELS OF THE ATMOSPHERE, AND ANY AREAS OF SIGNIFICANT CLOUDS OR CONVECTION.