je.st
news
Tag: tropical storm
Summary for Tropical Storm Isaias (AT4/AL092020)
2020-08-04 08:57:01| National Hurricane Center (Atlantic)
...ISAIAS WEAKENS TO A TROPICAL STORM OVER EASTERN NORTH CAROLINA... ...STRONG WINDS, HEAVY RAINFALL, AND THE THREAT OF TORNADOES BEGINNING TO SPREAD INTO SOUTHEASTERN VIRGINIA... As of 3:00 AM EDT Tue Aug 4 the center of Isaias was located near 35.5, -78.0 with movement NNE at 24 mph. The minimum central pressure was 992 mb with maximum sustained winds of about 70 mph.
Tags: summary
storm
tropical
tropical storm
Tropical Storm Isaias Public Advisory Number 28A
2020-08-04 07:54:00| National Hurricane Center (Atlantic)
Issued at 200 AM EDT Tue Aug 04 2020 000 WTNT34 KNHC 040553 TCPAT4 BULLETIN Hurricane Isaias Intermediate Advisory Number 28A NWS National Hurricane Center Miami FL AL092020 200 AM EDT Tue Aug 04 2020 ...CENTER OF ISAIAS MOVING QUICKLY NORTH-NORTHEASTWARD OVER EASTERN NORTH CAROLINA... ...STRONG WINDS AND HEAVY RAINFALL TO SPREAD NORTHWARD ALONG THE MID-ATLANTIC COAST THIS MORNING... SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...35.0N 78.1W ABOUT 60 MI...95 KM SW OF GREENVILLE NORTH CAROLINA MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.29 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: Hurricane and Storm Surge Warnings south of Little River Inlet South Carolina have been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Little River Inlet South Carolina to Cape Fear North Carolina * Pamlico and Albemarle Sounds, including the Neuse and Pamlico Rivers * Ocracoke Inlet North Carolina to the North Carolina/Virginia border A Storm Surge Watch is in effect for... * Cape Fear to Ocracoke Inlet North Carolina A Hurricane Warning is in effect for... * Little River Inlet South Carolina to Surf City North Carolina A Tropical Storm Warning is in effect for... * North of Surf City North Carolina to Eastport Maine * Pamlico and Albemarle Sounds * Chesapeake Bay * Tidal Potomac River * Delaware Bay * Long Island and Long Island Sound * Martha's Vineyard, Nantucket, and Block Island A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic 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 Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, generally within 36 hours. 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 200 AM EDT (0600 UTC), the center of Hurricane Isaias was located near latitude 35.0 North, longitude 78.1 West. Isaias is moving toward the north-northeast near 23 mph (37 km/h), and this general motion accompanied by an increase in forward speed is expected through today. On the forecast track, the center of Isaias will continue to move across eastern North Carolina early this morning. The center will move into southeastern Virginia around daybreak, near or along the coast of the mid-Atlantic states today, and continue across the northeastern United States tonight. Maximum sustained winds are near 75 mph (140 km/h) with higher gusts. Only gradual weakening is anticipated while Isaias moves north-northeastward near the mid-Atlantic coast today. Hurricane-force winds extend outward up to 25 miles (35 km) from the center, and tropical-storm-force winds extend outward up to 125 miles (205 km). A wind gust to 64 mph (104 km/h) was recently reported near Bogue, North Carolina. The estimated minimum central pressure is 992 mb (29.29 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Isaias can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.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... Little River Inlet SC to Ocracoke Inlet NC...2-4 ft Ocracoke Inlet to the North Carolina/Virginia border including Pamlico Sound, Albemarle Sound, Neuse and Pamlico Rivers...3-5 ft North of the North Carolina/Virginia border to Martha's Vineyard including the Chesapeake Bay, the Tidal Potomac River, Delaware Bay, Long Island Sound, Block Island Sound, Narragansett Bay, Buzzards Bay, and Vineyard Sound...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 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 will continue across portions of the hurricane warning area for another hour or two. Widespread tropical-storm conditions are expected in the tropical storm warning area from coastal North Carolina to the mid-Atlantic states, including portions of the Chesapeake Bay region, later today, with wind gusts to hurricane force possible. These winds could cause tree damage and power outages. Tropical storm conditions are expected to reach southern New England this afternoon and northern New England tonight and early Wednesday. Gale-force winds are expected to spread into southeastern Quebec tonight and Wednesday. See products issued by Environment Canada for more information. RAINFALL: The following rainfall accumulations are expected along and near the track of Isaias: Carolinas and the Mid-Atlantic: 3 to 6 inches, isolated maximum totals 8 inches. Eastern New York and western New England from Connecticut to New Hampshire: 2 to 4 inches, isolated maximum totals 6 inches. Western and northern Maine: 1 to 3 inches. Heavy rainfall along the East Coast, near the path of Isaias, will result in flash and urban flooding, some of which may be significant in the eastern Carolinas, Mid-Atlantic and Northeast through Wednesday. Widespread minor to moderate river flooding is possible across portions of the Carolinas and the Mid-Atlantic. Quick-responding rivers in Northeast will also be susceptible to minor river flooding. TORNADOES: A few tornadoes will be possible across eastern North Carolina early this morning, and from eastern Virginia northeastward into southern New England today. SURF: Swells generated by Isaias are affecting portions of the southeast coast of the United States and will spread northward along the Mid-Atlantic and Northeast coasts of the United States today. 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 500 AM EDT. $$ Forecaster Brown/Berg
Tags: number
public
storm
advisory
Tropical Storm Isaias Potential Storm Surge Flooding Map
2020-08-03 23:51:33| National Hurricane Center (Atlantic)
Potential Storm Surge Flooding Map last updated Mon, 03 Aug 2020 21:51:33 GMT
Tags: map
potential
storm
tropical
Tropical Storm Isaias Probabilistic Storm Surge Graphics
2020-08-03 23:16:01| National Hurricane Center (Atlantic)
Probabilistic Storm Surge Graphics last updated Mon, 03 Aug 2020 21:16:01 GMT
Tags: graphics
storm
tropical
surge
Tropical Storm Isaias Forecast Discussion Number 27
2020-08-03 22:59:24| National Hurricane Center (Atlantic)
Issued at 500 PM EDT Mon Aug 03 2020 000 WTNT44 KNHC 032059 TCDAT4 Tropical Storm Isaias Discussion Number 27 NWS National Hurricane Center Miami FL AL092020 500 PM EDT Mon Aug 03 2020 Isaias is undergoing its daily reorganization phase, with a ragged eye-like feature now showing up in NOAA Doppler weather radars from Charleston, Wilmington, and Jacksonville. The last Air Force Reserve reconnaissance flight reported a peak SFMR-derived surface wind speed of 62 kt in the southwest quadrant around 1630Z while Isaias was experiencing a center reformation further to the east. Since then, Doppler velocities of 70-75 kt have been observed between 10,000-15,000 ft in the northern semicircle, but within reflectivity regions less than 35 dBZ, which suggests that a the reduction factor is likely less than the 90-percent value typically used. Thus the intensity is being held at 60 kt, which means that Isaias is very near hurricane status. Another Air Force Reserve reconnaissance will be investigating the cyclone around 0000Z this evening. Isaias is now moving north-northeastward 015/14 kt. The new NHC model guidance remains in excellent agreement on Isaias continuing to gradually accelerate north-northeastward to northeastward for the next 36 hours ahead of a powerful deep-layer trough and associated cold front. The cyclone should make landfall later this evening near the South Carolina-North Carolina border, and then accelerate north-northeastward at 25-30 kt across eastern North Carolina early Tuesday, eastern Virginia and the Delmarva peninsula Tuesday afternoon, and into New England Tuesday night into early Wednesday. The new NHC track forecast is just an update and extension of the previous advisory track, and lies very close to a blend of the tightly packed multi-model consensus aids TVCA, GFEX, TVCX, and NOAA-HCCA. Satellite animation and special 1800Z upper-air soundings indicate that the vertical shear across Isaias has weakened and has also become more southwesterly, which better aligns with the forecast track. Given this and the improved structure of the system, Isaias is still expected to strengthen and regain hurricane status before making landfall, and most of the intensity guidance shows a 60-65 kt system at that time. It should be emphasized that there is little difference between a strong tropical storm or a category 1 hurricane in terms of impacts. After landfall, Isaias is forecast to only slowly weaken due to interaction with an unusually strong 100-120 kt jetstream. The expected strong baroclinic forcing will keep Isaias' circulation intact and also produce very strong wind gusts along the mid-Atlantic coast tomorrow. As a result, the gust factors at 24-48 h have been increased above the standard 20 percent in the Forecast/Advisory (TCMAT4). The cyclone is forecast to be absorbed by a larger extratropical low over Canada in 3-4 days. Key Messages: 1. There is the danger of life-threatening storm surge inundation along portions of the immediate coastline and adjacent waterways of northeastern South Carolina and the North Carolina coast, including portions of Pamlico and Albemarle Sounds. Residents in these areas should follow advice given by local emergency officials. 2. Isaias is expected to be at or near hurricane strength when it reaches the coast of northeastern South Carolina and southern North Carolina in a few hours, and hurricane conditions are expected in the Hurricane Warning area this evening. 3. Isaias is expected to bring widespread sustained tropical storm force winds and wind gusts to hurricane force to the mid-Atlantic coast, including portions of the Chesapeake Bay region, on Tuesday, which could cause tree damage and power outages. Tropical storm conditions are expected to spread across New England late Tuesday into early Wednesday. 4. Heavy rainfall along the East Coast near the path of Isaias will result in flash and urban flooding, some of which may be significant in the eastern Carolinas, mid-Atlantic and northeast through Wednesday. Widespread minor to moderate river flooding is possible across portions of the Carolinas and the Mid-Atlantic. Quick- responding rivers in the northeast will also be susceptible to minor river flooding. FORECAST POSITIONS AND MAX WINDS INIT 03/2100Z 32.0N 79.4W 60 KT 70 MPH 12H 04/0600Z 34.7N 78.1W 60 KT 70 MPH...INLAND 24H 04/1800Z 39.3N 75.3W 55 KT 65 MPH...INLAND 36H 05/0600Z 44.5N 71.8W 45 KT 50 MPH...INLAND 48H 05/1800Z 48.8N 68.6W 30 KT 35 MPH...POST-TROP/EXTRATROP 60H 06/0600Z 52.0N 67.1W 25 KT 30 MPH...POST-TROP/EXTRATROP 72H 06/1800Z 54.3N 63.4W 25 KT 30 MPH...POST-TROP/EXTRATROP 96H 07/1800Z...DISSIPATED $$ Forecaster Stewart
Tags: number
discussion
storm
tropical
Sites : [941] [942] [943] [944] [945] [946] [947] [948] [949] [950] [951] [952] [953] [954] [955] [956] [957] [958] [959] [960] next »