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Tropical Storm Zeta Graphics
2020-10-27 15:52:56| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Tue, 27 Oct 2020 14:52:56 GMT Wind Speed Probabilities last updated Tue, 27 Oct 2020 15:25:22 GMT
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Tropical Storm Zeta Forecast Discussion Number 12
2020-10-27 15:51:06| National Hurricane Center (Atlantic)
Issued at 1000 AM CDT Tue Oct 27 2020 811 WTNT43 KNHC 271451 TCDAT3 Tropical Storm Zeta Discussion Number 12 NWS National Hurricane Center Miami FL AL282020 1000 AM CDT Tue Oct 27 2020 High-resolution GOES-16 visible satellite images indicate that the center of Zeta has moved just offshore of the northern coast of Yucatan. Based on Air Force and NOAA aircraft observations a little while ago, after the cyclone's interaction with the Yucatan, the maximum winds had decreased to near 55 kt. The cloud pattern of the storm is well organized, with a small Central Dense Overcast and numerous banding features. Given this, Zeta is likely to restrengthen as it moves over the warm waters of the southern Gulf of Mexico and in a low-shear environment today through tomorrow morning. When the cyclone nears the northern Gulf Coast in 30-36 hours, decreasing oceanic heat content and possibly stronger shear will likely halt the intensification process. The official intensity forecast shows slight weakening near landfall, but Zeta is likely to be at or near hurricane strength when it crosses the coastline. The NHC intensity forecast is close to the model consensus and a blend of the LGEM and Decay-SHIPS guidance. The storm continues its generally northwestward motion, or at around 305/12 kt. Zeta will move northwestward to northward around the southwestern and western periphery of a mid-level high pressure area centered east of Florida for the next 24 hours or so. Then, a strong 500-mb shortwave trough approaching from the west should cause Zeta to accelerate north-northeastward to northeastward by late Wednesday and Thursday. This will bring Zeta across the north-central Gulf coast late Wednesday and over the southeastern United States on Thursday. Aside from some speed differences, the track models are in good agreement and have shown good run-to-run consistency. The official track forecast is about the same as the previous one and close to the model consensus. Given Zeta's acceleration near landfall, strong winds are likely to spread well inland along the northern Gulf coast Wednesday night. KEY MESSAGES: 1. A life-threatening storm surge is expected along portions of the northern Gulf Coast by late Wednesday, with the highest inundation occurring somewhere between the Mouth of the Pearl River and Dauphin Island, Alabama. Residents in the Storm Surge Warning area should follow any advice given by local officials. 2. Hurricane conditions are expected by late Wednesday within portions of the Hurricane Warning area between Morgan City, Louisiana, and the Mississippi/Alabama border. Damaging winds, especially in gusts, will spread well inland across portions of southeast Mississippi and southern Alabama Wednesday night due to Zetas fast forward speed. 3. Between tonight and Thursday, heavy rainfall is expected from portions of the central U.S. Gulf Coast into the Ohio Valley and Mid-Atlantic States near and in advance of Zeta. This rainfall will lead to flash, urban, small stream, and minor river flooding. 4. Tropical storm conditions will continue in portions of the northern Yucatan Peninsula of Mexico during the next few hours. Heavy rainfall is expected across the Yucatan Peninsula, the Cayman Islands, and western Cuba today, which will lead to flash flooding in urban areas. FORECAST POSITIONS AND MAX WINDS INIT 27/1500Z 21.6N 89.5W 55 KT 65 MPH 12H 28/0000Z 23.1N 90.9W 70 KT 80 MPH 24H 28/1200Z 25.7N 91.6W 75 KT 85 MPH 36H 29/0000Z 29.3N 89.9W 70 KT 80 MPH 48H 29/1200Z 34.2N 85.2W 30 KT 35 MPH...INLAND 60H 30/0000Z 38.5N 76.5W 30 KT 35 MPH...INLAND 72H 30/1200Z 41.0N 66.0W 45 KT 50 MPH...POST-TROP/EXTRATROP 96H 31/1200Z...DISSIPATED $$ Forecaster Pasch
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Tropical Storm Zeta Storm Surge Watch/Warning Map
2020-10-27 15:50:50| National Hurricane Center (Atlantic)
Storm Surge Watch/Warning Map last updated Tue, 27 Oct 2020 14:50:50 GMT
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Summary for Tropical Storm Zeta (AT3/AL282020)
2020-10-27 15:48:09| National Hurricane Center (Atlantic)
...ZETA EXPECTED TO BRING HURRICANE CONDITIONS TO PORTIONS OF THE NORTHERN GULF OF MEXICO COAST ON WEDNESDAY... As of 10:00 AM CDT Tue Oct 27 the center of Zeta was located near 21.6, -89.5 with movement NW at 14 mph. The minimum central pressure was 985 mb with maximum sustained winds of about 65 mph.
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Tropical Storm Zeta Forecast Advisory Number 12
2020-10-27 15:45:40| National Hurricane Center (Atlantic)
Issued at 1500 UTC TUE OCT 27 2020 000 WTNT23 KNHC 271445 TCMAT3 TROPICAL STORM ZETA FORECAST/ADVISORY NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL282020 1500 UTC TUE OCT 27 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * INTRACOASTAL CITY LOUISIANA TO NAVARRE FLORIDA * LAKE BORGNE...LAKE PONTCHARTRAIN...VERMILION BAY...PENSACOLA BAY...AND MOBILE BAY A HURRICANE WARNING IS IN EFFECT FOR... * MORGAN CITY LOUISIANA TO THE MISSISSIPPI/ALABAMA BORDER * LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS A TROPICAL STORM WARNING IS IN EFFECT FOR... * PUNTA ALLEN TO PROGRESO MEXICO * COZUMEL * MISSISSIPPI/ALABAMA BORDER TO OKALOOSA/WALTON COUNTY LINE FLORIDA A TROPICAL STORM WATCH IS IN EFFECT FOR... * WEST OF MORGAN CITY TO INTRACOASTAL CITY LOUISIANA 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 TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. TROPICAL STORM CENTER LOCATED NEAR 21.6N 89.5W AT 27/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT 12 KT ESTIMATED MINIMUM CENTRAL PRESSURE 985 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT. 50 KT....... 70NE 70SE 20SW 40NW. 34 KT.......120NE 120SE 60SW 70NW. 12 FT SEAS..180NE 0SE 0SW 30NW. 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 21.6N 89.5W AT 27/1500Z AT 27/1200Z CENTER WAS LOCATED NEAR 21.3N 89.0W FORECAST VALID 28/0000Z 23.1N 90.9W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 30NE 20SE 0SW 0NW. 50 KT... 70NE 70SE 20SW 40NW. 34 KT...120NE 120SE 60SW 70NW. FORECAST VALID 28/1200Z 25.7N 91.6W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 25NE 20SE 0SW 0NW. 50 KT... 50NE 50SE 20SW 30NW. 34 KT...120NE 120SE 50SW 70NW. FORECAST VALID 29/0000Z 29.3N 89.9W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 25NE 20SE 0SW 10NW. 50 KT... 50NE 50SE 20SW 30NW. 34 KT...100NE 120SE 50SW 50NW. FORECAST VALID 29/1200Z 34.2N 85.2W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 30/0000Z 38.5N 76.5W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 30/1200Z 41.0N 66.0W...POST-TROP/EXTRATROP MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 60NE 220SE 300SW 60NW. 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...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N 89.5W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 27/1800Z NEXT ADVISORY AT 27/2100Z $$ FORECASTER PASCH
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