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Subtropical Storm Alberto Forecast Advisory Number 4

2018-05-26 10:51:58| National Hurricane Center (Atlantic)

Issued at 0900 UTC SAT MAY 26 2018 000 WTNT21 KNHC 260851 TCMAT1 SUBTROPICAL STORM ALBERTO FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL012018 0900 UTC SAT MAY 26 2018 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WATCH IS IN EFFECT FOR... * HORSESHOE BEACH FLORIDA TO THE MOUTH OF THE MISSISSIPPI RIVER A TROPICAL STORM WATCH IS IN EFFECT FOR... * TULUM TO CABO CATOCHE MEXICO * CUBAN PROVINCE OF PINAR DEL RIO * INDIAN PASS FLORIDA TO GRAND ISLE LOUISIANA * LAKE PONTCHARTRAIN AND LAKE MAUREPAS 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 TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE IN THE YUCATAN AND CUBA PORTIONS OF THE WATCH AREA... IN THIS CASE WITHIN THE NEXT 24 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE IN THE UNITED STATES PORTION OF THAT WATCH AREA WITHIN 48 HOURS. SUBTROPICAL STORM CENTER LOCATED NEAR 19.9N 85.6W AT 26/0900Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 15 DEGREES AT 6 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT.......120NE 100SE 0SW 0NW. 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 19.9N 85.6W AT 26/0900Z AT 26/0600Z CENTER WAS LOCATED NEAR 19.3N 85.7W FORECAST VALID 26/1800Z 21.6N 85.1W MAX WIND 35 KT...GUSTS 45 KT. 34 KT...120NE 100SE 0SW 0NW. FORECAST VALID 27/0600Z 24.3N 85.0W MAX WIND 40 KT...GUSTS 50 KT. 34 KT...120NE 100SE 40SW 90NW. FORECAST VALID 27/1800Z 26.2N 85.9W...TROPICAL STORM MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 30SE 0SW 0NW. 34 KT...110NE 120SE 80SW 80NW. FORECAST VALID 28/0600Z 27.5N 86.8W...TROPICAL STORM MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 40NE 40SE 0SW 0NW. 34 KT... 90NE 120SE 60SW 60NW. FORECAST VALID 29/0600Z 30.4N 87.9W...NEAR THE COAST MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 40SE 0SW 0NW. 34 KT... 60NE 120SE 60SW 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 30/0600Z 33.3N 88.1W...INLAND MAX WIND 25 KT...GUSTS 35 KT. OUTLOOK VALID 31/0600Z 38.0N 85.0W...INLAND MAX WIND 20 KT...GUSTS 30 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 19.9N 85.6W NEXT ADVISORY AT 26/1500Z $$ FORECASTER CANGIALOSI

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Subtropical Storm Alberto Graphics

2018-05-26 07:32:37| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Sat, 26 May 2018 05:32:37 GMT Wind Speed Probabilities last updated Sat, 26 May 2018 02:45:52 GMT

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Summary for Subtropical Storm Alberto (AT1/AL012018)

2018-05-26 07:32:28| National Hurricane Center (Atlantic)

...HEAVY RAINFALL EXPECTED TO AFFECT THE YUCATAN PENINSULA...WESTERN CUBA...FLORIDA...AND THE NORTHEASTERN GULF COAST THROUGH THE WEEKEND... As of 1:00 AM CDT Sat May 26 the center of Alberto was located near 19.1, -85.7 with movement E at 4 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

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Subtropical Storm Alberto Public Advisory Number 3A

2018-05-26 07:32:28| National Hurricane Center (Atlantic)

Issued at 100 AM CDT Sat May 26 2018 000 WTNT31 KNHC 260532 TCPAT1 BULLETIN Subtropical Storm Alberto Intermediate Advisory Number 3A NWS National Hurricane Center Miami FL AL012018 100 AM CDT Sat May 26 2018 ...DISORGANIZED ALBERTO MOVING LITTLE OVER THE NORTHWESTERN CARIBBEAN SEA... ...HEAVY RAINFALL EXPECTED TO AFFECT THE YUCATAN PENINSULA...WESTERN CUBA...FLORIDA...AND THE NORTHEASTERN GULF COAST THROUGH THE WEEKEND... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...19.1N 85.7W ABOUT 120 MI...195 KM SE OF COZUMEL MEXICO ABOUT 200 MI...320 KM SSW OF THE WESTERN TIP OF CUBA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...E OR 90 DEGREES AT 4 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Horseshoe Beach Florida to the Mouth of the Mississippi River A Tropical Storm Watch is in effect for... * Tulum to Cabo Catoche Mexico * Cuban province of Pinar del Rio * Indian Pass Florida to Grand Isle Louisiana * Lake Pontchartrain and Lake Maurepas 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 Tropical Storm Watch means that tropical storm conditions are possible in the Yucatan and Cuba portions of the watch area, in this case within the next 24 hours. A Tropical Storm Watch means that tropical storm conditions are possible in the United States portion of that watch area 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 the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- Recent satellite-derived wind data indicate that Alberto's center is located a little farther south than previously estimated. At 100 AM CDT (0600 UTC), the center of Subtropical Storm Alberto was located near latitude 19.1 North, longitude 85.7 West. The storm is moving generally toward the east near 4 mph (6 km/h). A turn toward the north is expected to begin later today, with a faster motion toward the north expected Saturday night and Sunday. A turn toward the north-northwest is expected on Monday. Maximum sustained winds remain near 40 mph (65 km/h) with higher gusts. Gradual strengthening is forecast during the next 48 hours, with little change in strength forecast on Monday. Winds of 40 mph extend outward up to 140 miles (220 km) mainly to the east of the center. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Alberto is expected to produce total rain accumulations of 10 to 15 inches with isolated totals of 25 inches across the northeastern portions of the Yucatan Peninsula and western Cuba. These rains could produce life-threatening flash floods and mudslides. Rainfall accmumulations of 4 to 8 inches with maximum amounts of 12 inches are possible across the Florida Keys and southern and southwestern Florida. Heavy rain will likely begin to affect the central Gulf Coast region and the southeastern United States later this weekend and continue into early next week. Flooding potential will increase across this region early next week as Alberto is forecast to slow down after it moves inland. WIND: Tropical storm conditions are possible within the watch area in Cuba and the Yucatan Peninsula through today. Tropical storm conditions are possible within the United States watch area beginning on Sunday. STORM SURGE: The combination of 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... Horseshoe Beach to the Mouth of the Mississippi River...2 to 4 ft The deepest water will occur along the immediate coast. 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. TORNADOES: A tornado or two may occur over the Florida Keys and parts of southern and southwestern Florida beginning this evening. SURF: Swells generated by Alberto are affecting portions of the coast of eastern Yucatan Peninsula and western Cuba. These swells are likely to cause life-threatening surf and rip current conditions. Hazardous surf conditions are likely to develop along much of the central and eastern U.S. Gulf Coast through the weekend. For more information, consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 400 AM CDT. $$ Forecaster Cangialosi/Berg

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Subtropical Storm Alberto Potential Storm Surge Flooding Map

2018-05-26 06:03:21| National Hurricane Center (Atlantic)

Potential Storm Surge Flooding Map last updated Sat, 26 May 2018 04:03:21 GMT

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