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Tropical Depression Harvey Forecast Advisory Number 13
2017-08-23 22:36:02| National Hurricane Center (Atlantic)
Issued at 2100 UTC WED AUG 23 2017 000 WTNT24 KNHC 232035 TCMAT4 TROPICAL DEPRESSION HARVEY FORECAST/ADVISORY NUMBER 13 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 2100 UTC WED AUG 23 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WATCH IS IN EFFECT FOR... * PORT MANSFIELD TO HIGH ISLAND A HURRICANE WATCH IS IN EFFECT FOR... * NORTH OF PORT MANSFIELD TO SAN LUIS PASS A TROPICAL STORM WATCH IS IN EFFECT FOR... * BOCA DE CATAN MEXICO TO PORT MANSFIELD TEXAS * NORTH OF SAN LUIS PASS TO HIGH ISLAND 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 WATCH IS TYPICALLY ISSUED 48 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS IN SOUTHWESTERN LOUISIANA SHOULD CONTINUE TO MONITOR THE PROGRESS OF THIS SYSTEM. TROPICAL DEPRESSION CENTER LOCATED NEAR 21.6N 92.6W AT 23/2100Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 2 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1005 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 21.6N 92.6W AT 23/2100Z AT 23/1800Z CENTER WAS LOCATED NEAR 21.5N 92.5W FORECAST VALID 24/0600Z 22.4N 93.0W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 60NE 0SE 0SW 0NW. FORECAST VALID 24/1800Z 23.8N 93.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 70NE 50SE 30SW 50NW. FORECAST VALID 25/0600Z 25.1N 95.2W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 0NW. 34 KT... 90NE 70SE 40SW 60NW. FORECAST VALID 25/1800Z 26.4N 96.3W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 50NE 40SE 20SW 30NW. 34 KT...120NE 90SE 50SW 80NW. FORECAST VALID 26/1800Z 28.6N 97.3W...INLAND MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 0NE 30SE 0SW 0NW. 34 KT... 60NE 90SE 30SW 30NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 27/1800Z 29.0N 97.3W...INLAND MAX WIND 35 KT...GUSTS 45 KT. OUTLOOK VALID 28/1800Z 29.0N 96.5W...INLAND MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N 92.6W NEXT ADVISORY AT 24/0300Z $$ FORECASTER PASCH
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Summary for Tropical Depression Harvey (AT4/AL092017)
2017-08-23 19:32:07| National Hurricane Center (Atlantic)
...HARVEY MOVING LITTLE BUT EXPECTED TO RESUME A NORTHWESTWARD COURSE SOON... As of 1:00 PM CDT Wed Aug 23 the center of Harvey was located near 21.5, -92.5 with movement Stationary. The minimum central pressure was 1005 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Harvey Public Advisory Number 12A
2017-08-23 19:32:07| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Wed Aug 23 2017 000 WTNT34 KNHC 231731 TCPAT4 BULLETIN Tropical Depression Harvey Intermediate Advisory Number 12A NWS National Hurricane Center Miami FL AL092017 100 PM CDT Wed Aug 23 2017 ...HARVEY MOVING LITTLE BUT EXPECTED TO RESUME A NORTHWESTWARD COURSE SOON... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...21.5N 92.5W ABOUT 535 MI...860 KM SSE OF PORT OCONNOR TEXAS ABOUT 470 MI...755 KM SE OF PORT MANSFIELD TEXAS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...STATIONARY MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Port Mansfield to High Island A Hurricane Watch is in effect for... * North of Port Mansfield to San Luis Pass A Tropical Storm Watch is in effect for... * Boca De Catan Mexico to Port Mansfield Texas * North of San Luis Pass to High Island 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 watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Interests in southwestern Louisiana should monitor the progress of this system for possible watches this afternoon. 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 48-HOUR OUTLOOK ------------------------------ At 100 PM CDT (1800 UTC), the center of Tropical Depression Harvey was located near latitude 21.5 North, longitude 92.5 West. The depression has been nearly stationary for the past few hours, but is expected to resume a motion toward the northwest near 9 mph (15 km/h) later today. A track toward the northwest or north-northwest is expected for the next 48 hours. On the forecast track, Harvey should be approaching the Texas coast late Friday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Some strengthening is forecast during the next 48 hours, and Harvey could become a hurricane on Friday. The estimated minimum central pressure is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Harvey is expected to produce total rain accumulations of 10 to 15 inches with isolated maximum amounts of 20 inches over the middle and upper Texas coast and southwest Louisiana through next Tuesday, with heavy rainfall beginning as early as Friday morning. Harvey is also expected to produce total rain accumulations of 3 to 9 inches in portions of south, central, and northeast Texas and the rest of the lower Mississippi Valley. Rainfall from Harvey could cause life-threatening flooding. 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 is expected to reach the following heights above ground if the peak surge occurs at the time of high tide... Port Mansfield to High Island...4 to 6 ft The deepest water will occur along the immediate coast near and to the northeast of the landfall location, where the surge will be accompanied by large and destructive 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 possible within the hurricane watch area by late Friday, with tropical storm conditions possible by early Friday. SURF: Swells generated by Harvey are likely to affect the Texas, Louisiana, and northeast Mexico coasts by Friday. 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 400 PM CDT. $$ Forecaster Pasch
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Tropical Depression Harvey Potential Storm Surge Flooding Map
2017-08-23 17:41:22| National Hurricane Center (Atlantic)
Potential Storm Surge Flooding Map last updated Wed, 23 Aug 2017 15:41:22 GMT
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Tropical Depression Harvey Graphics
2017-08-23 17:29:33| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Wed, 23 Aug 2017 15:29:33 GMT Wind Speed Probabilities last updated Wed, 23 Aug 2017 15:29:33 GMT
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