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Tropical Depression Norbert Public Advisory Number 16

2020-10-09 16:32:38| National Hurricane Center (East Pacific)

Issued at 900 AM MDT Fri Oct 09 2020 000 WTPZ34 KNHC 091432 TCPEP4 BULLETIN Tropical Depression Norbert Advisory Number 16 NWS National Hurricane Center Miami FL EP192020 900 AM MDT Fri Oct 09 2020 ...DISORGANIZED NORBERT MOVING SLOWLY NORTHWESTWARD... SUMMARY OF 900 AM MDT...1500 UTC...INFORMATION ---------------------------------------------- LOCATION...13.3N 106.1W ABOUT 410 MI...660 KM SSW OF MANZANILLO MEXICO MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...NW OR 315 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 AM MDT (1500 UTC), the center of Tropical Depression Norbert was located near latitude 13.3 North, longitude 106.1 West. The depression is moving toward the northwest near 3 mph (6 km/h). A slow northwestward motion is expected for the next few days. Maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Little change in strength is forecast during the next couple of days. Norbert is expected to dissipate by Monday. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 300 PM MDT. $$ Forecaster Latto

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Tropical Depression Norbert Wind Speed Probabilities Number 16

2020-10-09 16:32:37| National Hurricane Center (East Pacific)

Issued at 1500 UTC FRI OCT 09 2020 000 FOPZ14 KNHC 091432 PWSEP4 TROPICAL DEPRESSION NORBERT WIND SPEED PROBABILITIES NUMBER 16 NWS NATIONAL HURRICANE CENTER MIAMI FL EP192020 1500 UTC FRI OCT 09 2020 AT 1500Z THE CENTER OF TROPICAL DEPRESSION NORBERT WAS LOCATED NEAR LATITUDE 13.3 NORTH...LONGITUDE 106.1 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 25 KTS...30 MPH...45 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 12Z FRI AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 12Z FRI 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE PERIODS TO TO TO TO TO TO TO 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE 12Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT 15N 105W 34 X 1( 1) 1( 2) 1( 3) X( 3) X( 3) X( 3) 15N 110W 34 X X( X) 1( 1) 1( 2) 2( 4) X( 4) X( 4) $$ FORECASTER LATTO

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Tropical Depression Norbert Forecast Advisory Number 16

2020-10-09 16:32:09| National Hurricane Center (East Pacific)

Issued at 1500 UTC FRI OCT 09 2020 000 WTPZ24 KNHC 091432 TCMEP4 TROPICAL DEPRESSION NORBERT FORECAST/ADVISORY NUMBER 16 NWS NATIONAL HURRICANE CENTER MIAMI FL EP192020 1500 UTC FRI OCT 09 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 13.3N 106.1W AT 09/1500Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT 3 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1009 MB MAX SUSTAINED WINDS 25 KT WITH GUSTS TO 35 KT. 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 13.3N 106.1W AT 09/1500Z AT 09/1200Z CENTER WAS LOCATED NEAR 13.2N 106.0W FORECAST VALID 10/0000Z 13.6N 106.4W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 10/1200Z 14.1N 107.0W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 11/0000Z 14.6N 107.3W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 11/1200Z 14.8N 107.5W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 12/0000Z 14.9N 108.0W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 12/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.3N 106.1W NEXT ADVISORY AT 09/2100Z $$ FORECASTER LATTO

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Hurricane Delta Public Advisory Number 19A

2020-10-09 13:59:36| National Hurricane Center (Atlantic)

Issued at 700 AM CDT Fri Oct 09 2020 000 WTNT31 KNHC 091159 TCPAT1 BULLETIN Hurricane Delta Intermediate Advisory Number 19A NWS National Hurricane Center Miami FL AL262020 700 AM CDT Fri Oct 09 2020 ...RAINBANDS OF DELTA SPREADING INTO SOUTHWESTERN LOUISIANA AND SOUTHEASTERN TEXAS... ...EXPECTED TO BRING HURRICANE CONDITIONS AND A LIFE-THREATENING STORM SURGE TO PORTIONS OF THE NORTHERN GULF COAST LATER TODAY... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...27.5N 93.8W ABOUT 160 MI...255 KM S OF CAMERON LOUISIANA MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...N OR 350 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...958 MB...28.29 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * High Island Texas to Mouth of the Pearl River Louisiana including Calcasieu Lake, Vermilion Bay, and Lake Borgne A Hurricane Warning is in effect for... * High Island Texas to Morgan City Louisiana A Tropical Storm Warning is in effect for... * West of High Island to Sargent Texas * East of Morgan City Louisiana to the mouth of the Pearl River, including New Orleans * Lake Pontchartrain and Lake Maurepas 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. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 700 AM CDT (1200 UTC), the center of Hurricane Delta was located near latitude 27.5 North, longitude 93.8 West. Delta is moving toward the north near 12 mph (19 km/h), and this motion is expected to continue today followed by a north-northeastward motion by tonight. On the forecast track, the center of Delta will move inland within the hurricane warning area this evening. Maximum sustained winds are near 120 mph (195 km/h) with higher gusts. Delta is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Slow weakening is expected to begin as Delta approaches the northern Gulf coast later today, with rapid weakening expected after the center moves inland. Hurricane-force winds extend outward up to 40 miles (65 km) from the center and tropical-storm-force winds extend outward up to 160 miles (260 km). The latest minimum central pressure estimated from NOAA Hurricane Hunter aircraft data is 958 mb (28.29 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Delta can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1, WMO header WTNT41 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT1.shtml. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Rockefeller Wildlife Refuge, LA to Morgan City, LA including Vermilion Bay...7-11 ft Holly Beach, LA to Rockefeller Wildlife Refuge, LA...5-8 ft Sabine Pass to Holly Beach, LA...3-5 ft Morgan City, LA to Port Fourchon, LA...4-7 ft Port Fourchon, LA to the Mouth of the Mississippi River...2-4 ft Calcasieu Lake...2-4 ft High Island, TX to Sabine Pass...2-4 ft Mouth of the Mississippi River to Mouth of the Pearl River...2-4 ft Lake Borgne...2-4 ft Lake Pontchartrain and Lake Maurepas...1-3 ft Mouth of the Pearl River, LA to the AL/FL border including Mobile Bay...1-3 ft Sabine Lake...1-3 ft Port O'Connor, TX to High Island, TX including Galveston Bay... 1-3 ft It is important to note that small changes in the track, structure, or intensity of Delta could have large impacts on where the highest storm surge occurs. Users are urged to stay tuned for possible changes and updates. The deepest water will occur along the immediate coast near and to the east of the landfall location, where the surge will be accompanied by large and dangerous waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Hurricane conditions are expected within the hurricane warning area by this afternoon, with tropical storm conditions expected within this area later this morning. Tropical storm conditions are expected within the tropical storm warning areas later today. RAINFALL: Today through Saturday, Delta is expected to produce 5 to 10 inches of rain, with isolated maximum totals of 15 inches, from southwest into central Louisiana. These rainfall amounts will lead to significant flash, urban, small stream flooding, along with minor to major river flooding. For extreme east Texas into northern Louisiana, southern Arkansas, and western Mississippi, Delta is expected to produce 3 to 6 inches of rain, with isolated maximum totals of 10 inches. These rainfall amounts will lead to flash, urban, small stream, and isolated minor river flooding. As the remnants of Delta move further inland, 1 to 3 inches of rain, with locally higher amounts, are expected in the Tennessee Valley and Mid Atlantic this weekend. There is a potential for 3 to 6 inches in the Southern Appalachians, which could lead to isolated flash, urban, and small stream flooding. TORNADOES: A few tornadoes are possible today and tonight over southern portions of Louisiana and Mississippi. SURF: Swells from Delta are affecting portions of the northern and western Gulf coast. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1000 AM CDT. $$ Forecaster Beven

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Hurricane Delta Forecast Discussion Number 19

2020-10-09 10:45:29| National Hurricane Center (Atlantic)

Issued at 400 AM CDT Fri Oct 09 2020 297 WTNT41 KNHC 090845 TCDAT1 Hurricane Delta Discussion Number 19 NWS National Hurricane Center Miami FL AL262020 400 AM CDT Fri Oct 09 2020 Delta has been generally steady in strength during the past several hours as it starts to close in on the southwestern Louisiana coast. An eye has occasionally been evident in geostationary satellite images, and deep convection remains quite intense around that feature. The Air Force Hurricane Hunters recently found have been investigating Delta this morning, and recently reported maximum flight-level winds of 125 kt and peak SFMR surface winds of 99 kt. Based on a blend of this data, the initial intensity is held at 105 kt. The hurricane appears to be leveling off in strength as recent microwave passes show some asymmetry in the eyewall and vertical tilt due to southwesterly shear. The core of the hurricane passed very close to NOAA buoy 42002 a few hours ago, and the pressure at the buoy fell to 953 mb. The buoy also reported peak winds around 70 kt and a significant wave height of about 35 ft. The major hurricane is now moving northward at 10 kt. The track forecast models remain quite consistent. Delta is forecast to continue moving northward today and then turn north-northeastward tonight between a ridge over the western Atlantic and a trough over the south-central United States. This motion is expected to take the core of the hurricane to the Louisiana coast this evening. After landfall, a turn to the northeast is forecast as a larger trough moves eastward toward Delta, and that motion should continue until the cyclone dissipates over Tennessee or Kentucky in a few days. The models remain tightly clustered, and only minor tweaks were made to the previous NHC track forecast. Delta is expected to move over waters with progressively lower oceanic heat content as it approaches the Louisiana coast. These less favorable oceanic conditions combined with an increase in southwesterly shear should cause Delta to weaken a little before it moves onshore. Regardless, Delta is forecast to be near major hurricane intensity when it makes landfall and significant impacts are expected (see Key Messages below). After landfall, rapid weakening is anticipated and Delta is forecast to fall below hurricane strength tonight or early Saturday and dissipate in about 3 days. Key Messages: 1. Life-threatening storm surge is expected near and east of where Delta makes landfall this evening, and a Storm Surge Warning is in effect from High Island, Texas, to Ocean Springs, Mississippi. The highest inundation of 7 to 11 feet is expected somewhere between Rockefeller Wildlife Refuge and Morgan City, Louisiana. Residents in the warning area should promptly follow advice given by local officials. The storm surge risk remains high despite the forecast decrease in intensity before landfall since Delta is a relatively large hurricane. 2. Hurricane-force winds are expected this afternoon and evening somewhere within the Hurricane Warning area between High Island, Texas, and Morgan City, Louisiana. Hurricane force winds will also spread inland across portions of southern Louisiana near the path of Deltas center this evening and tonight. 3. Heavy rainfall will lead to significant flash flooding and minor to major river flooding in parts of Louisiana today and Saturday. Additional flooding is expected across portions of the central Gulf Coast into the Lower Mississippi Valley. FORECAST POSITIONS AND MAX WINDS INIT 09/0900Z 26.9N 93.7W 105 KT 120 MPH 12H 09/1800Z 28.6N 93.3W 95 KT 110 MPH 24H 10/0600Z 31.1N 92.3W 60 KT 70 MPH...INLAND 36H 10/1800Z 32.9N 91.0W 30 KT 35 MPH...INLAND 48H 11/0600Z 34.2N 89.1W 25 KT 30 MPH...INLAND 60H 11/1800Z 35.6N 87.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 72H 12/0600Z...DISSIPATED $$ Forecaster Cangialosi

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