000 AGXX40 KNHC 060513 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 AM EDT FRI APR 6 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. A STRONG MID LEVEL FLOW DOMINATES THE REGION TONIGHT WITH A SHORTWAVE IN THE SRN BRANCH OVER THE E CENTRAL GULF MOVING E 25 KT. A LARGE CYCLONIC CIRCULATION OVER THE GREATLAKES IS ALLOWING THE NRN BRANCH TO INTERACT WITH THE SRN BRANCH. A STRONG SHORTWAVE IS DROPPING SE OVER THE NRN PLAINS TONIGHT. ON THE SURFACE TONIGHT A 1010 MB LOW WAS ON A STATIONARY FRONT OVER THE SE GULF MOVING NE. A 1017 MB HIGH WAS E OF THE BAHAMAS. STRONGEST WINDS WERE OVER THE NRN GULF WITH 20 TO 25 KT WINDS. LATER DAY 1 LOOK FOR MID LEVEL HEIGHTS TO CONTINUE FALLING W OF 70W AS THE STRONG SHORTWAVE MOVES TO THE OH VALLEY. THE GULF SHORTWAVE WASHES OUT AS IT MOVES THROUGH THE CONFLUENT FLOW TO NEAR 30N70W. ON THE SURFACE LATER DAY 1 A 1007 MB LOW MOVES TO NEAR 30N73W WITH WINDS OF 20 KT. GULF WINDS REMAIN MODERATE NLY. ATLC HIGH PRES 1019 MB MOVES TO NEAR 29N49W AND MAINTAINS MODERATE TRADES S OF 16N E OF 70W. A WEAK COLD FRONT MOVES INTO THE NW CARIB WITH 15 KT WINDS. FOR DAY 2 THE STRONG CYCLONIC CIRCULATION MOVES TOWARD THE ATLC COAST PACKING THE MID LEVEL HEIGHT LINES S OF 35N RESULTING IN STRONG CONFLUENT WLY FLOW W OF 70W. MID LEVEL RIDGING STRENGTHENS OVER MID OCEAN ALONG 50W. ON THE SURFACE DAY 2 THE SURFACE RIDGE OVER MID OCEAN STRENGTHENS TO 1023 MB WITH TRADES PICKING UP TO 20 KT. DEPARTING LOW PRES CONTINUES TO PRODUCE WLY WINDS OF 20 TO 25 KT N OF 28N BETWEEN 55W TO 80W. NRN GULF WINDS REMAIN BRISK N TO NE AT 20 TO 25 KT UNDER A STRENGTHENING RIDGE OF HIGH PRES. OUTLOOK PERIOD... FOR DAY 3 THE LARGE CYCLONIC CIRCULATION MOVES NE WITH MID LEVEL COLD AIR MOVING TO THE TN VALLEY. S OF 35N THE MID LEVEL FLOW REMAINS STRONG WLY WHILE A MID LEVEL RIDGE REMAINS OVER THE MID OCEAN ALONG 48W. ON THE SURFACE DAY 3 LITTLE CHANGE E OF 60W. WINDS DECREASE BETWEEN 60W AND 80W UNDER WEAK GRADIENT. GUSTY NE WINDS CONTINUE OVER THE NRN GULF WHERE A RIDGE REMAINS PARKED OVER THE SRN PLAINS. FOR DAY 4 THE TAIL END OF THE COLD AIR ALOFT IN THE FORM OF A SHORTWAVE MOVES OFF THE MID ATLC COAST HEADING E. THE MID LEVEL FLOW W OF 80W REMAINS W TO NW. ON THE SURFACE DAY 4 ALL PRES PATTERNS WEAKEN WITH THE RESULTING WINDS MOSTLY LIGHT TO MODERATE. FOR DAY 5 HINTS OF MORE ACTION IN THE WESTERLIES. ONE STRONG SHORTWAVE DROPPING SE OVER THE N CENTRAL PLAINS WHILE A WEAKER SHORTWAVE MOVES E OVER NRN MEXICO. ON THE SURFACE DAY 5 SLY RETURN FLOW INCREASES OVER THE GULF W OF 90W AS HIGH PRES MOVES OFF THE SE COAST AND PRESSURES FALL OVER THE SRN PLAINS. A WEAK COLD FRONT MOVES E OF THE BAHAMAS WITH WINDS TO 20 KT MOSTLY N OF 28N. ELSEWHERE WINDS MOSTLY LIGHT TO MODERATE ELY. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER RRG