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Summary for Tropical Depression Grace (AT2/AL072021)
2021-08-16 22:48:20| National Hurricane Center (Atlantic)
...TORRENTIAL RAINS CONTINUE OVER PORTIONS OF HAITI AND THE DOMINICAN REPUBLIC... ...GRACE FORECAST TO STRENGTHEN OVER THE NORTHWESTERN CARIBBEAN SEA... As of 5:00 PM EDT Mon Aug 16 the center of Grace was located near 17.9, -72.4 with movement WNW at 13 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Grace Public Advisory Number 14
2021-08-16 22:48:20| National Hurricane Center (Atlantic)
Issued at 500 PM EDT Mon Aug 16 2021 000 WTNT32 KNHC 162048 TCPAT2 BULLETIN Tropical Depression Grace Advisory Number 14 NWS National Hurricane Center Miami FL AL072021 500 PM EDT Mon Aug 16 2021 ...TORRENTIAL RAINS CONTINUE OVER PORTIONS OF HAITI AND THE DOMINICAN REPUBLIC... ...GRACE FORECAST TO STRENGTHEN OVER THE NORTHWESTERN CARIBBEAN SEA... SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...17.9N 72.4W ABOUT 50 MI...80 KM S OF PORT AU PRINCE HAITI ABOUT 365 MI...585 KM E OF MONTEGO BAY JAMAICA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Southern coast of the Cuban provinces of Santiago de Cuba, Granma, Las Tunas, and Camaguey * Cayman Islands A Tropical Storm Watch is in effect for... * Entire coast of Haiti * Jamaica * Southern coast of the Cuban provinces of Ciego de Avila, Sancti Spiritus, Cienfuegos, and Matanzas, as well as Isla de la Juventud. 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 in Cuba and the Yucatan Peninsula of Mexico should monitor the progress of Grace. Additional watches or warnings are possible tonight or on Tuesday. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 PM EDT (2100 UTC), the center of Tropical Depression Grace was located near latitude 17.9 North, longitude 72.4 West. Grace is moving toward the west-northwest near 13 mph (20 km/h). A west to west-northwest motion is expected during the next few days. On the forecast track, the center of Grace will move near the Tiburon Peninsula of Haiti through tonight, move between Jamaica and southeastern Cuba on Tuesday, near the Cayman Islands Tuesday night, and approach the Yucatan Peninsula of Mexico Wednesday and Wednesday night. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Strengthening is forecast during the next few days, and Grace is expected to regain tropical storm status on Tuesday. Grace could be near hurricane strength when it approaches the Yucatan Peninsula of Mexico Wednesday night. The estimated minimum central pressure is 1007 mb (29.74 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Grace can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC and on the web at www.hurricanes.gov/graphics_at2.shtml?key_messages. WIND: Tropical storm conditions are possible in Haiti this evening into tonight, and in Jamaica on Tuesday. Tropical storm conditions are expected along the southern coast of Cuba within the warning area on Tuesday, and over the Cayman Islands beginning late Tuesday into early Wednesday. Tropical storm conditions are possible along the southern coast of Cuba within the watch area Tuesday night and Wednesday. RAINFALL: Grace is expected to produce the following rainfall amounts: Over Haiti and the Dominican Republic...5 to 10 inches of rain with isolated maximum totals of 15 inches are expected across the southern terrain areas through Tuesday. This heavy rainfall may lead to flash and urban flooding, and possible mudslides. Over far southern Cuba, Jamaica, and the Cayman Islands....2 to 4 inches of rain with isolated maximum totals of 6 inches are expected through Thursday. This heavy rainfall may lead to flash and urban flooding. SURF: Swells generated by Grace will continue to affect portions of Hispaniola over the next day or so, and will spread westward to Jamaica, the Cayman Islands, the southern coast of Cuba, and the Yucatan Peninsula of Mexico. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 PM EDT. Next complete advisory at 1100 PM EDT. $$ Forecaster Berg
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Tropical Depression Grace Forecast Advisory Number 14
2021-08-16 22:47:48| National Hurricane Center (Atlantic)
Issued at 2100 UTC MON AUG 16 2021 000 WTNT22 KNHC 162047 TCMAT2 TROPICAL DEPRESSION GRACE FORECAST/ADVISORY NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL AL072021 2100 UTC MON AUG 16 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * SOUTHERN COAST OF THE CUBAN PROVINCES OF SANTIAGO DE CUBA... GRANMA...LAS TUNAS...AND CAMAGUEY * CAYMAN ISLANDS A TROPICAL STORM WATCH IS IN EFFECT FOR... * ENTIRE COAST OF HAITI * JAMAICA * SOUTHERN COAST OF THE CUBAN PROVINCES OF CIEGO DE AVILA...SANCTI SPIRITUS...CIENFUEGOS...AND MATANZAS...AS WELL AS ISLA DE LA JUVENTUD. 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 IN CUBA AND THE YUCATAN PENINSULA OF MEXICO SHOULD MONITOR THE PROGRESS OF GRACE. ADDITIONAL WATCHES OR WARNINGS ARE POSSIBLE TONIGHT OR ON TUESDAY. TROPICAL DEPRESSION CENTER LOCATED NEAR 17.9N 72.4W AT 16/2100Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1007 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 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 17.9N 72.4W AT 16/2100Z AT 16/1800Z CENTER WAS LOCATED NEAR 17.8N 71.8W FORECAST VALID 17/0600Z 18.3N 74.4W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 17/1800Z 18.9N 77.2W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 70NE 0SE 0SW 40NW. FORECAST VALID 18/0600Z 19.6N 80.4W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 80NE 70SE 0SW 60NW. FORECAST VALID 18/1800Z 20.2N 83.5W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 30NW. 34 KT...100NE 90SE 30SW 80NW. FORECAST VALID 19/0600Z 20.9N 86.7W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 40NE 30SE 0SW 30NW. 34 KT...120NE 90SE 40SW 90NW. FORECAST VALID 19/1800Z 21.6N 89.9W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 50NE 30SE 0SW 30NW. 34 KT...120NE 70SE 40SW 90NW. 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 20/1800Z 22.4N 95.1W MAX WIND 65 KT...GUSTS 80 KT. OUTLOOK VALID 21/1800Z 22.4N 98.8W...INLAND MAX WIND 65 KT...GUSTS 80 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.9N 72.4W INTERMEDIATE PUBLIC ADVISORY...WTNT32 KNHC/MIATCPAT2...AT 17/0000Z NEXT ADVISORY AT 17/0300Z $$ FORECASTER BERG
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Tropical Storm Fred Forecast Discussion Number 29
2021-08-16 22:46:41| National Hurricane Center (Atlantic)
Issued at 400 PM CDT Mon Aug 16 2021 000 WTNT41 KNHC 162046 TCDAT1 Tropical Storm Fred Discussion Number 29 NWS National Hurricane Center Miami FL AL062021 400 PM CDT Mon Aug 16 2021 Radar data indicate that the center of Fred made landfall in the eastern Florida Panhandle a little while ago, and it is currently moving farther inland. Observations from the Air Force Hurricane Hunters indicate that the storm reached a peak intensity of 55 kt just before landfall. Assuming some weakening since crossing the coast, the current intensity estimate is 50 kt. Fairly rapid weakening will occur while the center moves over land, and the cyclone will probably be reduced to tropical depression status by tomorrow morning. The official intensity forecast for the next day or so is close to the latest Decay-SHIPS model guidance. Radar fixes indicate that the motion is north-northeastward, or 020/8 kt. During the next day or two Fred should move, with increasing forward speed, between a mid-level subtropical high pressure area over the southwestern Atlantic and a weak trough over the east-central United states. The official track forecast is quite close to the latest NOAA corrected consensus model prediction, HCCA. Although it is weakening, Fred is likely to bring flooding rains over portions of the southeastern and eastern United States during the next couple of days. KEY MESSAGES: 1. Through Tuesday, heavy rainfall may lead to considerable flash, urban, small stream, and isolated river flooding impacts across portions of the Florida Big Bend and Panhandle. By the middle of the week as Fred lifts north and inland, heavy rainfall and flooding will impact the southern and central Appalachians, the Piedmont of the Southeast and Mid-Atlantic. Landslides are possible across the mountains of North Carolina and Blue Ridge Escarpment on Tuesday. 2. Dangerous storm surge inundation is ongoing along portions of the coast of the Florida Panhandle and the Florida Big Bend region. 3. Tropical storm conditions will continue along the coastline within the warning area over the next few hours and will continue to spread farther inland later today and tonight across portions of the Florida Panhandle, southwestern Georgia, and southeastern Alabama. FORECAST POSITIONS AND MAX WINDS INIT 16/2100Z 29.9N 85.3W 50 KT 60 MPH...INLAND 12H 17/0600Z 31.5N 85.1W 35 KT 40 MPH...INLAND 24H 17/1800Z 34.0N 84.3W 30 KT 35 MPH...INLAND 36H 18/0600Z 37.0N 82.5W 25 KT 30 MPH...POST-TROP/INLAND 48H 18/1800Z 39.5N 80.0W 20 KT 25 MPH...POST-TROP/INLAND 60H 19/0600Z...DISSIPATED $$ Forecaster Pasch
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Tropical Storm Henri Forecast Discussion Number 4
2021-08-16 22:46:40| National Hurricane Center (Atlantic)
Issued at 500 PM AST Mon Aug 16 2021 000 WTNT43 KNHC 162046 TCDAT3 Tropical Storm Henri Discussion Number 4 NWS National Hurricane Center Miami FL AL082021 500 PM AST Mon Aug 16 2021 Deep convection has persisted near and southeast of the center of the small tropical cyclone today, and subjective Dvorak intensity estimates were a consensus T2.5 (35 kt) at 1800 UTC. Objective estimates from ADT and SATCON also support tropical storm status, therefore the depression has been upgraded to a 35-kt tropical storm with this advisory. Henri (ahn-REE) becomes the eighth named storm of the 2021 Atlantic hurricane season. This is the fourth-earliest eighth storm on record with only 2020, 2005, and 1936 having the eighth-named storm form earlier in the season. Henri is located over warm waters, but is currently being affected by light to moderate northerly shear and dry mid-level air in the surrounding environment. Although these conditions are not overly conducive for strengthening, most of the intensity guidance supports gradual intensification over the next 24 to 48 hours. After that time, a significant increase in northeasterly upper-level winds is depicted by the global models over the system, which is likely to halt further strengthening. In fact, given the small size of Henri, it is likely to be more susceptible to the increase in shear, and it could weaken faster than indicated below. The HWRF remains more aggressive, but given the expected increase in shear, that solution still does not seem likely. The NHC intensity forecast is in best agreement with the LGEM model, and is slightly below the IVCN intensity consensus. The tropical storm is moving south-southwestward or 200/6 kt. Henri is forecast to move west-southwestward during the next 12-24 hours around the southeastern side of a mid-tropospheric high over the western Atlantic. After that time, Henri should turn westward as the ridge shifts eastward to the north of the tropical cyclone, and after 72 hours Henri is expected to approach the western extent of the ridge and should turn northward and then north-northeastward. The dynamical model guidance is in somewhat better agreement during the next 48-72 hours, but there remains some spread later in the period as to how sharp of northward turn occurs. The new NHC track forecast is similar to the previous advisory and lies near the center of the guidance envelope. FORECAST POSITIONS AND MAX WINDS INIT 16/2100Z 31.0N 62.9W 35 KT 40 MPH 12H 17/0600Z 30.5N 63.4W 40 KT 45 MPH 24H 17/1800Z 30.3N 64.2W 45 KT 50 MPH 36H 18/0600Z 30.2N 65.4W 50 KT 60 MPH 48H 18/1800Z 30.2N 66.9W 50 KT 60 MPH 60H 19/0600Z 30.3N 68.5W 50 KT 60 MPH 72H 19/1800Z 30.5N 69.9W 45 KT 50 MPH 96H 20/1800Z 31.8N 70.2W 45 KT 50 MPH 120H 21/1800Z 34.2N 68.4W 45 KT 50 MPH $$ Forecaster Brown
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