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Hurricane Ida Forecast Discussion Number 6

2021-08-27 22:49:28| National Hurricane Center (Atlantic)

Issued at 500 PM EDT Fri Aug 27 2021 000 WTNT44 KNHC 272049 TCDAT4 Hurricane Ida Discussion Number 6 NWS National Hurricane Center Miami FL AL092021 500 PM EDT Fri Aug 27 2021 Cuban radar data and reports from an earlier Air Force Reserve Hurricane Hunter mission indicate that Ida's inner core structure continued to improve after the release of the previous advisory package. An eye became apparent in radar imagery before the center reached the Isle of Youth, and the final fix from the Air Force Hurricane Hunter aircraft reported a closed 24-n-mi wide eye. The aircraft measured winds to support hurricane intensity shortly before 1800 UTC, and during the final northeast eyewall pass, and flight-level wind data support increasing the intensity to 70 kt, which is used as the initial intensity for this advisory. The upper-level outflow has expanded over all but the southwestern portion of the circulation, and the upper-level wind pattern is forecast to continue to improve overnight and early Saturday. Once Ida moves past western Cuba and into the southeastern Gulf of Mexico, it will be moving through a very favorable oceanic and atmospheric environment consisting of high ocean heat content waters, low vertical wind shear, and a moist low- to mid-level atmosphere. These conditions are likely to result in a period of rapid strengthening during the next 24 to 36 hours. In fact, with the higher initial wind speed, the intensity guidance has significantly increased this cycle, and the bulk of the guidance now brings Ida to category 4 intensity. The NHC forecast explicitly calls for rapid intensification during the next 24 to 36 hours, which is supported by several of the dynamical models, the LGEM model, and high probabilities of rapid intensification indicated by the SHIPS and DTOPS RI guidance. The NHC forecast is near the IVCN multi-model consensus aid, but is lower than HCCA and LGEM. It should be noted that some fluctuations in intensity are possible as Ida nears the northern Gulf coast due to possible eyewall replacement cycles. In addition to the expected increase in strength, the dynamical model guidance again calls for Ida's wind field to expand while it moves over the Gulf of Mexico. As a result, there is higher-than-normal confidence that a large and powerful hurricane will impact portions of the northern Gulf coast by late this weekend and early next week. Ida has wobbled a little right of the previous track, but the longer term motion continues to be northwestward or 320/13 kt. The steering currents remain well-established as a strong deep-layer ridge over the western Atlantic should continue to steer Ida northwestward across the Gulf this weekend. Ida will approach the western portion of the ridge after landfall, and this should result in a slower northward motion by day 3. After that time, a short-wave trough over the central United States is expected to cause the system to turn northeastward. The track guidance remains in remarkably good agreement through landfall along the northern Gulf coast, and there is higher-than-normal confidence in that portion of the track forecast. However, users are again reminded to not focus on the exact details of the track forecast as storm surge, wind, and rainfall impacts will extend far from the center. Key Messages: 1. Life-threatening storm surge and hurricane conditions are expected to continue through tonight in portions of western Cuba, including the Isle of Youth, where a Hurricane Warning is in effect. Life-threatening heavy rains, flash flooding and mudslides are expected across Jamaica, the Cayman Islands, and western Cuba, including the Isle of Youth. 2. There is a danger of life-threatening storm surge inundation Sunday along the coasts of Louisiana and Mississippi within the Storm Surge Warning area. Extremely life-threatening inundation of 10 to 15 feet above ground level is possible within the area from Morgan City, Louisiana, to the Mouth of the Mississippi River. Interests throughout the warning area should follow any advice given by local officials. 3. Ida is expected to be an extremely dangerous major hurricane when it reaches the coast of Louisiana. Hurricane-force winds are expected Sunday in portions of the Hurricane Warning area along the Louisiana coast, including metropolitan New Orleans, with potentially catastrophic wind damage possible where the core of Ida moves onshore. Actions to protect life and property should be rushed to completion in the warning area. 4. Ida is likely to produce heavy rainfall later Sunday into Monday across the central Gulf Coast from southeast Louisiana to coastal Mississippi and Alabama, resulting in considerable flash, urban, small stream, and riverine flooding impacts. As Ida moves inland, flooding impacts are possible across portions of the Lower Mississippi and Tennessee Valleys. FORECAST POSITIONS AND MAX WINDS INIT 27/2100Z 22.1N 83.2W 70 KT 80 MPH 12H 28/0600Z 23.5N 84.8W 85 KT 100 MPH 24H 28/1800Z 25.3N 86.9W 105 KT 120 MPH 36H 29/0600Z 27.1N 89.0W 115 KT 130 MPH 48H 29/1800Z 28.6N 90.6W 120 KT 140 MPH 60H 30/0600Z 30.0N 91.3W 80 KT 90 MPH...INLAND 72H 30/1800Z 31.5N 91.1W 40 KT 45 MPH...INLAND 96H 31/1800Z 34.4N 89.3W 30 KT 35 MPH...INLAND 120H 01/1800Z 36.0N 86.0W 20 KT 25 MPH...POST-TROP/REMNT LOW $$ Forecaster Brown

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Tropical Storm Nora Forecast Discussion Number 9

2021-08-27 22:49:02| National Hurricane Center (East Pacific)

Issued at 400 PM CDT Fri Aug 27 2021 000 WTPZ44 KNHC 272048 TCDEP4 Tropical Storm Nora Discussion Number 9 NWS National Hurricane Center Miami FL EP142021 400 PM CDT Fri Aug 27 2021 A 1656 UTC ASCAT-B scatterometer pass showed that Nora still does not have a tight inner core and instead has a 30-35 n mi region of winds 20 kt or less. However, the pass did show maximum wind vectors a little over 50 kt, so the storm has been strengthening, and maximum winds are estimated to be 55 kt. This is supported by Dvorak estimates of T3.5/55 kt from TAFB and SAB. A slight adjustment was made to Nora's initial position based on the scatterometer data, but the storm is still moving toward the northwest (310/10 kt). Nora is expected to maintain a motion toward the northwest or north-northwest as it heads in the direction of a weakness in the subtropical ridge which has developed over the U.S. southern Rockies and northern Mexico. The track guidance envelope appears to have tightened up compared to the past few days, with nearly all the model trackers showing Nora's center passing offshore just west of Cabo Corrientes, Mexico, in about 24 hours and then continuing northwestward either across the waters of the Gulf of California or inland over Baja California Sur. The new NHC track forecast has been nudged westward from this morning's forecast, but this is mainly due to the adjustment of the storm's initial position. This track is very close to the HCCA and other consensus aids. Nora's convective structure appears to be responding to a decrease in northeasterly shear, which is analyzed to be out of the northeast at 10-15 kt. This shear is forecast to decrease to 10 kt or less by tonight. Although Nora's broad structure could limit the storm's rate of strengthening, warm waters and upper-level divergence should allow it to become a hurricane over the next day or so. After that time, Nora's intensity will be strongly modulated on whether its center moves over mainland Mexico or the Baja California peninsula. If the center remains over water, as is shown in the official forecast, then environmental conditions appear conducive for Nora to remain as a hurricane for several more days, and the NHC forecast still closely follows the ECMWF-based SHIPS and LGEM models. That said, there is still greater-than- normal uncertainty in the intensity forecast after 48 hours. Key Messages: 1. Nora is forecast to strengthen to a hurricane on Saturday while passing nearby the coasts of the Mexican states of Jalisco and Nayarit, and hurricane watches and tropical storm warnings are in effect for portions of that coastline. Interests in these areas should closely monitor the progress of Nora and subsequent updates to the forecast. 2. Heavy rain associated with Nora is expected across coastal sections of the Mexican states of Oaxaca, Guerrero, Michoacan, Colima, and Jalisco, as well as Baja California Sur. Life-threatening flash flooding and mudslides are expected. 3. Nora is forecast to move over the Gulf of California as a hurricane early next week, bringing a risk of wind and rain impacts to portions of the Mexican states of Baja California Sur, Sinaloa, and Sonora. Given the above-average uncertainty in the forecast, it is still too soon to determine the magnitude and location of these potential impacts. FORECAST POSITIONS AND MAX WINDS INIT 27/2100Z 15.5N 104.9W 55 KT 65 MPH 12H 28/0600Z 16.5N 105.6W 60 KT 70 MPH 24H 28/1800Z 18.3N 106.2W 65 KT 75 MPH 36H 29/0600Z 20.3N 107.0W 70 KT 80 MPH 48H 29/1800Z 21.9N 107.8W 75 KT 85 MPH 60H 30/0600Z 22.9N 108.6W 80 KT 90 MPH 72H 30/1800Z 23.9N 109.4W 80 KT 90 MPH 96H 31/1800Z 25.9N 110.9W 70 KT 80 MPH 120H 01/1800Z 28.4N 111.8W 55 KT 65 MPH $$ Forecaster Berg

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Tropical Storm Nora Forecast Advisory Number 9

2021-08-27 22:48:30| National Hurricane Center (East Pacific)

Issued at 2100 UTC FRI AUG 27 2021 844 WTPZ24 KNHC 272048 TCMEP4 TROPICAL STORM NORA FORECAST/ADVISORY NUMBER 9 NWS NATIONAL HURRICANE CENTER MIAMI FL EP142021 2100 UTC FRI AUG 27 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WATCH IS IN EFFECT FOR... * LAZARO CARDENAS TO CABO CORRIENTES MEXICO A TROPICAL STORM WARNING IS IN EFFECT FOR... * TECPAN DE GALEANA TO SAN BLAS MEXICO A TROPICAL STORM WATCH IS IN EFFECT FOR... * NORTH OF SAN BLAS TO MAZATLAN MEXICO A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN THE NEXT 36 HOURS. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE ALONG THE NORTHWESTERN COAST OF MAINLAND MEXICO AND SOUTHERN PORTIONS OF BAJA CALIFORNIA SUR SHOULD MONITOR THE PROGRESS OF NORA. ADDITIONAL WATCHES AND WARNINGS WILL LIKELY BE REQUIRED FOR PORTIONS OF THESE AREAS TONIGHT OR ON SATURDAY. TROPICAL STORM CENTER LOCATED NEAR 15.5N 104.9W AT 27/2100Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT 10 KT ESTIMATED MINIMUM CENTRAL PRESSURE 991 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT. 50 KT....... 50NE 70SE 0SW 0NW. 34 KT.......240NE 120SE 150SW 130NW. 12 FT SEAS..180NE 240SE 150SW 180NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 15.5N 104.9W AT 27/2100Z AT 27/1800Z CENTER WAS LOCATED NEAR 15.2N 104.7W FORECAST VALID 28/0600Z 16.5N 105.6W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 50NE 60SE 20SW 20NW. 34 KT...170NE 120SE 110SW 100NW. FORECAST VALID 28/1800Z 18.3N 106.2W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 25NE 20SE 0SW 0NW. 50 KT... 50NE 50SE 30SW 30NW. 34 KT...120NE 110SE 80SW 80NW. FORECAST VALID 29/0600Z 20.3N 107.0W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 25NE 20SE 0SW 0NW. 50 KT... 50NE 50SE 30SW 30NW. 34 KT...100NE 110SE 70SW 60NW. FORECAST VALID 29/1800Z 21.9N 107.8W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 25NE 20SE 15SW 15NW. 50 KT... 50NE 50SE 30SW 30NW. 34 KT...100NE 110SE 60SW 60NW. FORECAST VALID 30/0600Z 22.9N 108.6W MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 50NE 40SE 30SW 30NW. 34 KT...100NE 100SE 60SW 60NW. FORECAST VALID 30/1800Z 23.9N 109.4W MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 40NE 40SE 20SW 30NW. 34 KT...100NE 100SE 50SW 60NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 31/1800Z 25.9N 110.9W MAX WIND 70 KT...GUSTS 85 KT. OUTLOOK VALID 01/1800Z 28.4N 111.8W MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.5N 104.9W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPEP4...AT 28/0000Z NEXT ADVISORY AT 28/0300Z $$ FORECASTER BERG

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Hurricane Ida Forecast Advisory Number 6

2021-08-27 22:41:58| National Hurricane Center (Atlantic)

Issued at 2100 UTC FRI AUG 27 2021 000 WTNT24 KNHC 272041 TCMAT4 HURRICANE IDA FORECAST/ADVISORY NUMBER 6 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092021 2100 UTC FRI AUG 27 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A STORM SURGE WARNING HAS BEEN ISSUED FROM EAST OF ROCKEFELLER WILDLIFE REFUGE LOUISIANA TO THE MISSISSIPPI/ALABAMA BORDER INCLUDING VERMILION BAY...LAKE BORGNE...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS. A HURRICANE WARNING HAS BEEN ISSUED FOR THE COAST OF LOUISIANA FROM INTRACOASTAL CITY TO THE MOUTH OF THE PEARL RIVER...INCLUDING LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS. A TROPICAL STORM WARNING HAS BEEN ISSUED FOR THE NORTHERN GULF COAST FROM THE MOUTH OF THE PEARL RIVER TO THE MISSISSIPPI/ALABAMA BORDER. A TROPICAL STORM WARNING HAS ALSO BEEN ISSUED FOR THE COAST OF LOUISIANA FROM WEST OF INTRACOASTAL CITY TO CAMERON. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * EAST OF ROCKEFELLER WILDLIFE REFUGE LOUISIANA TO THE MISSISSIPPI/ALABAMA BORDER * VERMILION BAY...LAKE BORGNE...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS A HURRICANE WARNING IS IN EFFECT FOR... * CUBAN PROVINCES OF PINAR DEL RIO AND ARTEMISA...AND THE ISLE OF YOUTH * INTRACOASTAL CITY LOUISIANA TO THE MOUTH OF THE PEARL RIVER * LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS A STORM SURGE WATCH IS IN EFFECT FOR... * SABINE PASS TO ROCKEFELLER WILDLIFE REFUGE LOUISIANA * MOBILE BAY A HURRICANE WATCH IS IN EFFECT FOR... * CAMERON LOUISIANA TO WEST OF INTRACOASTAL CITY LOUISIANA * MOUTH OF THE PEARL RIVER TO THE MISSISSIPPI/ALABAMA BORDER A TROPICAL STORM WARNING IS IN EFFECT FOR... * CUBAN PROVINCES OF MATANZAS...MAYABEQUE...AND HAVANA * CAMERON LOUISIANA TO WEST OF INTRACOASTAL CITY LOUISIANA * MOUTH OF THE PEARL RIVER TO THE MISSISSIPPI/ALABAMA BORDER A TROPICAL STORM WATCH IS IN EFFECT FOR... * MISSISSIPPI/ALABAMA BORDER TO THE ALABAMA/FLORIDA BORDER A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...DURING THE NEXT 36 HOURS IN THE INDICATED LOCATIONS. FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT HURRICANES.GOV. THIS IS A LIFE-THREATENING SITUATION. PERSONS LOCATED WITHIN THESE AREAS SHOULD TAKE ALL NECESSARY ACTIONS TO PROTECT LIFE AND PROPERTY FROM RISING WATER AND THE POTENTIAL FOR OTHER DANGEROUS CONDITIONS. PROMPTLY FOLLOW EVACUATION AND OTHER INSTRUCTIONS FROM LOCAL OFFICIALS. A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A WARNING IS TYPICALLY ISSUED 36 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS. A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE- THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...IN THE INDICATED LOCATIONS DURING THE NEXT 48 HOURS. A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. A WATCH IS TYPICALLY ISSUED 48 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE ALONG THE NORTHERN U.S. GULF COAST SHOULD MONITOR THE PROGRESS OF THIS SYSTEM. INTERESTS IN THE DRY TORTUGAS SHOULD ALSO MONITOR THE PROGRESS OF IDA. HURRICANE CENTER LOCATED NEAR 22.1N 83.2W AT 27/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 985 MB MAX SUSTAINED WINDS 70 KT WITH GUSTS TO 85 KT. 64 KT....... 20NE 0SE 0SW 0NW. 50 KT....... 40NE 30SE 0SW 20NW. 34 KT....... 80NE 60SE 40SW 60NW. 12 FT SEAS.. 0NE 120SE 45SW 0NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 22.1N 83.2W AT 27/2100Z AT 27/1800Z CENTER WAS LOCATED NEAR 21.6N 82.7W FORECAST VALID 28/0600Z 23.5N 84.8W MAX WIND 85 KT...GUSTS 105 KT. 64 KT... 20NE 15SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 40NW. 34 KT...100NE 80SE 50SW 90NW. FORECAST VALID 28/1800Z 25.3N 86.9W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 20NE 20SE 15SW 20NW. 50 KT... 40NE 40SE 30SW 40NW. 34 KT...110NE 90SE 60SW 100NW. FORECAST VALID 29/0600Z 27.1N 89.0W MAX WIND 115 KT...GUSTS 140 KT. 64 KT... 30NE 25SE 20SW 30NW. 50 KT... 50NE 50SE 30SW 50NW. 34 KT...130NE 100SE 70SW 110NW. FORECAST VALID 29/1800Z 28.6N 90.6W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 30NE 25SE 20SW 25NW. 50 KT... 50NE 50SE 40SW 40NW. 34 KT...120NE 110SE 70SW 90NW. FORECAST VALID 30/0600Z 30.0N 91.3W...INLAND MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 40NE 40SE 30SW 20NW. 34 KT...100NE 100SE 60SW 70NW. FORECAST VALID 30/1800Z 31.5N 91.1W...INLAND MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 50NE 90SE 30SW 30NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 31/1800Z 34.4N 89.3W...INLAND MAX WIND 30 KT...GUSTS 40 KT. OUTLOOK VALID 01/1800Z 36.0N 86.0W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 22.1N 83.2W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 28/0000Z NEXT ADVISORY AT 28/0300Z $$ FORECASTER BROWN

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Hurricane Ida Forecast Advisory Number 5

2021-08-27 17:17:15| National Hurricane Center (Atlantic)

Issued at 1500 UTC FRI AUG 27 2021 382 WTNT24 KNHC 271516 CCA TCMAT4 TROPICAL STORM IDA FORECAST/ADVISORY NUMBER 5...CORRECTED NWS NATIONAL HURRICANE CENTER MIAMI FL AL092021 1500 UTC FRI AUG 27 2021 CORRECTED TO ADD 64-KT WIND RADII AT THE 12-HOUR FORECAST POINT CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE GOVERNMENT OF CUBA HAS REPLACE THE TROPICAL STORM WARNING WITH A HURRICANE WARNING FOR THE ISLE OF YOUTH...AND THE CUBAN PROVINCES OF PINAR DEL RIO AND ARTEMISA. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WARNING IS IN EFFECT FOR... * CUBAN PROVINCES OF PINAR DEL RIO AND ARTEMISA...AND THE ISLE OF YOUTH A STORM SURGE WATCH IS IN EFFECT FOR... * SABINE PASS TO ALABAMA/FLORIDA BORDER * VERMILION BAY...LAKE BORGNE...LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND MOBILE BAY A HURRICANE WATCH IS IN EFFECT FOR... * CAMERON...LOUISIANA TO THE MISSISSIPPI/ALABAMA BORDER * LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS A TROPICAL STORM WARNING IS IN EFFECT FOR... * LITTLE CAYMAN AND CAYMAN BRAC * CUBAN PROVINCES OF MATANZAS...MAYABEQUE...AND HAVANA A TROPICAL STORM WATCH IS IN EFFECT FOR... * MISSISSIPPI/ALABAMA BORDER TO THE ALABAMA/FLORIDA BORDER. A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE NEXT 12 HOURS. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE- THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...IN THE INDICATED LOCATIONS DURING THE NEXT 48 HOURS. FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT HURRICANES.GOV. A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. A WATCH IS TYPICALLY ISSUED 48 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE IN CENTRAL AND WESTERN CUBA AND ELSEWHERE ALONG THE NORTHERN U.S. GULF COAST SHOULD MONITOR THE PROGRESS OF THIS SYSTEM. HURRICANE WARNINGS WILL LIKELY BE REQUIRED FOR PORTIONS OF THE NORTHERN GULF COAST LATER TODAY. INTERESTS IN THE DRY TORTUGAS SHOULD ALSO MONITOR THE PROGRESS OF IDA. TROPICAL STORM CENTER LOCATED NEAR 20.7N 82.1W AT 27/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 996 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT. 50 KT....... 30NE 0SE 0SW 0NW. 34 KT....... 80NE 60SE 0SW 60NW. 12 FT SEAS.. 75NE 75SE 30SW 15NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 20.7N 82.1W AT 27/1500Z AT 27/1200Z CENTER WAS LOCATED NEAR 20.3N 81.7W FORECAST VALID 28/0000Z 22.2N 83.7W...INLAND MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 0SE 0SW 0NW. 50 KT... 30NE 0SE 0SW 30NW. 34 KT... 90NE 80SE 40SW 80NW. FORECAST VALID 28/1200Z 24.0N 85.8W...OVER WATER MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 20NE 15SE 0SW 15NW. 50 KT... 40NE 30SE 20SW 30NW. 34 KT...100NE 80SE 50SW 90NW. FORECAST VALID 29/0000Z 25.9N 87.8W MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 25NE 20SE 15SW 20NW. 50 KT... 50NE 40SE 30SW 40NW. 34 KT...110NE 90SE 60SW 100NW. FORECAST VALID 29/1200Z 27.6N 89.7W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 30NE 20SE 20SW 20NW. 50 KT... 50NE 40SE 40SW 40NW. 34 KT...120NE 110SE 70SW 100NW. FORECAST VALID 30/0000Z 29.0N 90.8W MAX WIND 105 KT...GUSTS 130 KT. 50 KT... 50NE 50SE 40SW 40NW. 34 KT...110NE 110SE 70SW 90NW. FORECAST VALID 30/1200Z 30.3N 91.3W...INLAND MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 30SE 0SW 20NW. 34 KT... 70NE 90SE 60SW 50NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 31/1200Z 33.3N 90.2W...INLAND MAX WIND 30 KT...GUSTS 40 KT. OUTLOOK VALID 01/1200Z 35.2N 87.1W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.7N 82.1W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 27/1800Z NEXT ADVISORY AT 27/2100Z $$ FORECASTER BROWN

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