Home › marco
 

Keywords :   


Tag: marco

Tropical Storm Marco Potential Storm Surge Flooding Map

2020-08-24 05:56:08| National Hurricane Center (Atlantic)

Potential Storm Surge Flooding Map last updated Mon, 24 Aug 2020 03:56:08 GMT

Tags: map potential marco storm

 

Tropical Storm Marco Probabilistic Storm Surge Graphics

2020-08-24 05:47:00| National Hurricane Center (Atlantic)

Probabilistic Storm Surge Graphics last updated Mon, 24 Aug 2020 03:47:00 GMT

Tags: graphics marco storm tropical

 
 

Summary for Tropical Storm Marco (AT4/AL142020)

2020-08-24 05:05:10| National Hurricane Center (Atlantic)

...HURRICANE HUNTERS FIND MARCO HAS WEAKENED... ...HURRICANE AND STORM SURGE WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE NORTHERN GULF COAST... As of 10:00 PM CDT Sun Aug 23 the center of Marco was located near 26.8, -87.6 with movement NNW at 12 mph. The minimum central pressure was 1000 mb with maximum sustained winds of about 70 mph.

Tags: summary marco storm tropical

 

Tropical Storm Marco Public Advisory Number 15

2020-08-24 05:05:10| National Hurricane Center (Atlantic)

Issued at 1000 PM CDT Sun Aug 23 2020 000 WTNT34 KNHC 240304 CCA TCPAT4 BULLETIN Tropical Storm Marco Advisory Number 15...Corrected NWS National Hurricane Center Miami FL AL142020 1000 PM CDT Sun Aug 23 2020 Corrected Rainfall statement in Hazards section. ...HURRICANE HUNTERS FIND MARCO HAS WEAKENED... ...HURRICANE AND STORM SURGE WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...26.8N 87.6W ABOUT 185 MI...295 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...NNW OR 345 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Hurricane Watch from Intracoastal City to west of Morgan City has been canceled. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for.... * Morgan City Louisiana to Ocean Springs Mississippi * Lake Borgne A Hurricane Warning is in effect for... * Morgan City Louisiana to the Mouth of the Pearl River A Storm Surge Watch is in effect for... * Sabine Pass to Morgan City Louisiana * Ocean Springs Mississippi to the Mississippi/Alabama border * Lake Pontchartrain and Lake Maurepas A Hurricane Watch is in effect for... * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning is in effect for... * Mouth of the Pearl River to the Mississippi/Alabama border * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans * Cameron to west of Morgan City 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 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 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. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1000 PM CDT (0300 UTC), the center of Tropical Storm Marco was located by an Air Force Reserve Hurricane Hunter plane near latitude 26.8 North, longitude 87.6 West. Marco is moving toward the north-northwest near 12 mph (19 km/h). A continued north-northwestward motion is possible tonight, but a turn toward the northwest is expected by Monday morning. Marco is forecast to approach the coast of Louisiana by Monday afternoon, and then turn westward and move near or over the coast through Tuesday. Data from the Hurricane Hunter plane indicate that maximum sustained winds have decreased to near 70 mph (110 km/h) with higher gusts. Fluctuations in intensity are possible during the next 24 hours, but Marco is forecast to weaken rapidly by early Tuesday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure based on data from the reconnaissance aircraft is 1000 mb (29.53 inches). HAZARDS AFFECTING LAND ---------------------- 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... Morgan City LA to Mouth of the Mississippi River...4-6 ft Mouth of the Mississippi River to Ocean Springs MS including Lake Borgne...3-5 ft Lake Pontchartrain and Lake Maurepas...2-4 ft Intracoastal City LA to Morgan City LA...2-4 ft Sabine Pass to Intracoastal City...1-3 ft Ocean Springs MS to the AL/FL Border including Mobile Bay...1-3 ft The deepest water will occur along the immediate coast in areas of onshore winds, 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 still possible within the hurricane warning area by midday Monday, with tropical storm conditions likely by midday Monday. Tropical storm conditions are possible within the tropical storm watch area on Monday, and hurricane conditions are possible within the hurricane watch areas late Monday. RAINFALL: Marco is expected to produce total rainfall accumulations of 3 to 5 inches with isolated maximum amounts of 10 inches across portions of the northeast and north-central Gulf coast through Tuesday. This rainfall may result in areas of flash, urban and small stream flooding along the area. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast for the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: Isolated tornadoes are possible across southeast Louisiana, southern Mississippi, southern Alabama, and the Florida Panhandle Monday and Monday night. NEXT ADVISORY ------------- Next intermediate advisory at 100 AM CDT. Next complete advisory at 400 AM CDT. $$ Forecaster Zelinsky

Tags: number public marco storm

 

Tropical Storm Marco Forecast Discussion Number 15

2020-08-24 04:56:43| National Hurricane Center (Atlantic)

Issued at 1000 PM CDT Sun Aug 23 2020 000 WTNT44 KNHC 240256 TCDAT4 Tropical Storm Marco Discussion Number 15 NWS National Hurricane Center Miami FL AL142020 1000 PM CDT Sun Aug 23 2020 Marco is feeling the effect of strong southwesterly shear. The center, as identified by an Air Force Reserve Hurricane Hunter aircraft, is displaced to the southwest edge of the convective canopy. That said, Marco has not quite fully decoupled yet and has moved well right of the previous forecast. Data from the plane indicates that Marco has weakened; the highest flight-level winds were only 58 kt with unflagged SFMR winds just above 50 kt. Marco's intensity has been lowered slightly to 60 kt, but this is probably generous. The intensity guidance remains maddeningly inconsistent. The most recent runs of the HWRF and HMON show that there is still a chance that Marco could reach the Gulf Coast as a hurricane, despite the shear. While this seems unlikely given the current structure of the cyclone, it also seems slightly premature to rule it out entirely. After all, the shear lessened enough to allow Marco to briefly strengthen after it was strongly sheared for a time last night. The rest of the guidance shows Marco weakening further as it approaches the coast, and this seems like a more likely solution. The NHC forecast just holds Marco at 60 kt for the next 24 h, but its certainly possible it could already be weaker than that. Rapid weakening is likely by 36 h if it hasn't happened sooner and Marco is forecast to become a remnant low by early Wednesday. Marco's track is tied entirely to its intensity and structure. Once Marco becomes fully decoupled it will slow and turn westward. It is not out of the question that this could happen before Marco reaches the coast and the system never makes landfall. However, as long as the strong southwesterly upper-level flow contributes to the steering, Marco will continue to move more northward to north-northwestward. Due to the recent northward movement of Marco's center, the NHC track forecast has been adjusted in that direction, but it is blended to the previous forecast by about 36 h and onward. Confidence in this forecast unfortunately remains low since the model spread remains usually high. It is worth noting that Marco is a small tropical cyclone. The large area of Tropical Storm and Hurricane watches and warnings along the northern Gulf Coast is a reflection of the unusually high uncertainty in the forecast, and it is unlikely that all of those regions will experience tropical-storm-force winds or life-threatening storm surge associated with Marco. However, impacts will likely occur in some portions of the watch/warning area beginning on Monday, and heavy rain is likely across most of the region during the next couple of days. Changes to the watches and warnings are likely on Monday and users should consult products from their local weather forecast office for more information about potential hazards in their area. Key Messages: 1. Strong winds, life-threatening storm surge, and heavy rainfall are expected from Marco along portions of the Gulf Coast beginning on Monday. Interests in these areas should follow any advice given by local government officials. 2. Tropical Storm Laura could bring additional storm surge, rainfall, and wind impacts to portions of the U.S. Gulf Coast by the middle of the week. This could result in a prolonged period of hazardous weather for areas that may also be affected by Marco. Interests there should monitor the progress of Marco and Laura and updates to the forecast during the next few days. FORECAST POSITIONS AND MAX WINDS INIT 24/0300Z 26.8N 87.6W 60 KT 70 MPH 12H 24/1200Z 28.0N 88.7W 60 KT 70 MPH 24H 25/0000Z 29.0N 90.2W 60 KT 70 MPH 36H 25/1200Z 29.6N 92.0W 40 KT 45 MPH...INLAND 48H 26/0000Z 29.8N 93.6W 30 KT 35 MPH...INLAND 60H 26/1200Z 29.7N 94.9W 25 KT 30 MPH...POST-TROP/INLAND 72H 27/0000Z...DISSIPATED $$ Forecaster Zelinsky

Tags: number discussion marco storm

 

Sites : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] next »