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Tropical Depression Harvey Public Advisory Number 42A
2017-08-31 01:54:58| National Hurricane Center (Atlantic)
Issued at 700 PM CDT Wed Aug 30 2017 000 WTNT34 KNHC 302354 TCPAT4 BULLETIN Tropical Depression Harvey Intermediate Advisory Number 42A NWS National Hurricane Center Miami FL AL092017 700 PM CDT Wed Aug 30 2017 ...FLOODING RAINS CONTINUING OVER EXTREME EASTERN TEXAS AND WESTERN LOUISIANA... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...31.2N 92.6W ABOUT 10 MI...15 KM SW OF ALEXANDRIA LOUISIANA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: All Tropical Storm Warnings have been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: There are no coastal watches or warnings in effect. Catastrophic and life-threatening flooding continues in southeastern Texas and portions of southwestern Louisiana. Please see warnings and other products issued by your local National Weather Service office for additional information on this life-threatening situation. 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 48-HOUR OUTLOOK ------------------------------ At 700 PM CDT (0000 UTC), the center of Tropical Depression Harvey was located near latitude 31.2 North, longitude 92.6 West. Harvey is moving toward the north-northeast near 8 mph (13 km/h), and this motion is expected to continue tonight. A turn toward the northeast is expected Thursday or Thursday night. On the forecast track, the center of Harvey should move through central Louisiana tonight, then move through northeastern Louisiana and northwestern Mississippi Thursday and Thursday night. Maximum sustained winds have decreased to near 35 mph (55 km/h) with higher gusts. Additional gradual weakening is forecast during the next 48 hours as Harvey moves farther inland. The estimated minimum central pressure based on surface observations is 998 mb (29.47 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Harvey is expected to produce additional rainfall accumulations of 4 to 8 inches from southwestern Louisiana and the adjacent border of eastern Texas northeastward into western Tennessee and Kentucky through Friday with isolated amounts up to 12 inches. The threat of heavy rains has ended in the Houston/ Galveston area. However catastrophic and life threatening flooding will continue in and around Houston, Beaumont/Port Arthur, eastward into southwest Louisiana for the rest of the week. The expected heavy rains spreading northeastward from Louisiana into western Kentucky may also lead to flash flooding and increased river and small stream flooding. DO NOT ATTEMPT TO TRAVEL IN THE AFFECTED AREA IF YOU ARE IN A SAFE PLACE. DO NOT DRIVE INTO FLOODED ROADWAYS. Please see warnings and products issued by your local National Weather Service office for additional information on this life-threatening situation. Elsewhere, the outer bands of Harvey are expected to produce additional rainfall amounts of 3 to 6 inches over portions of the central and eastern Gulf States and 2 to 4 inches farther north into parts of the Tennessee Valley, Ohio Valley and southern Mid Atlantic through Saturday. These rains may lead to flooding concerns across these areas. A list of preliminary rainfall observations compiled by the NOAA Weather Prediction Center can be found at: www.wpc.ncep.noaa.gov/discussions/nfdscc1.html 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... San Luis Pass to Grand Isle...1 to 2 ft The deepest water will occur along the immediate coast near the area of onshore winds. 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: Wind gusts to tropical storm force are still possible over portions of southern Louisiana and Mississippi tonight. SURF: Swells generated by Harvey are still affecting the coast of Louisiana, but are expected to subside late tonight and Thursday. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A few tornadoes are possible through this evening across parts of Louisiana, Mississippi, western Alabama, and southeast Arkansas. Additional tornadoes are possible on Thursday afternoon and evening across northern portions of Mississippi, Alabama, and Georgia into parts of Tennessee. NEXT ADVISORY ------------- Next complete advisory at 1000 PM CDT. $$ Forecaster Brown
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