Very Odd "Warning" from NHC

It seems that a "well-defined" low is just off the Louisiana coast, and is coming on-shore, and will produce "tropical-storm" force winds, but it idsn't even a TD. Huh? It does rate being a "greater than 50 percent" chance of forming a cyclone on the map. HUH??? - HLG

000
ABNT20 KNHC 052109
TWOAT
SPECIAL TROPICAL WEATHER OUTLOOK
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
510 PM EDT MON JUL 5 2010

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

A SMALL WELL-DEFINED LOW PRESSURE SYSTEM LOCATED ABOUT 50 MILES
SOUTH-SOUTHEAST OF MORGAN CITY LOUISIANA IS MOVING ONSHORE
TERREBONNE PARISH NEAR CAILLOU BAY. DOPPLER RADAR AND SATELLITE
DATA INDICATE THAT SUSTAINED WINDS NEAR TROPICAL-STORM-FORCE COULD
OCCUR ACROSS TERREBONNE PARISH...ESPECIALLY IN TERREBONNE
BAY...LATE THIS AFTERNOON AND EARLY EVENING AS THE SYSTEM MOVES
ONSHORE. THERE IS A HIGH CHANCE...60 PERCENT...OF THIS SYSTEM
BECOMING A TROPICAL CYCLONE BEFORE IT MOVES ONSHORE. THIS SYSTEM
WILL MOVE SLOWLY NORTHWESTWARD AFTER LANDFALL AND PRODUCE LOCALLY
HEAVY RAINFALL OVER PORTIONS OF SOUTH-CENTRAL AND SOUTHEASTERN
LOUISIANA. INTERESTS SHOULD MONITOR PRODUCTS ISSUED BY THEIR LOCAL
NATIONAL WEATHER FORECAST OFFICE FOR ADDITIONAL UPDATES AND ANY
WATCHES OR WARNINGS.