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| #1148846 (Received by flhurricane at: 1:59 AM 22.Aug.2023) TCPAT4 BULLETIN Tropical Storm Harold Intermediate Advisory Number 3A NWS National Hurricane Center Miami FL AL092023 100 AM CDT Tue Aug 22 2023 ...DEPRESSION STRENGTHENS INTO A TROPICAL STORM... ...HEAVY RAINS AND TROPICAL-STORM-FORCE WINDS OVER PORTIONS OF SOUTH TEXAS BEGINNING LATER THIS MORNING... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...25.8N 94.4W ABOUT 195 MI...310 KM ESE OF PORT MANSFIELD TEXAS MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 18 MPH...30 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Mouth of Rio Grande to Port O'Connor, Texas A Tropical Storm Watch is in effect for... * Port O'Connor to Sargent, Texas A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 12 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within 12 hours. Interests elsewhere in eastern Texas and northern Mexico should monitor the progress of this system. 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 100 AM CDT (0600 UTC), the center of Tropical Storm Harold was located near latitude 25.8 North, longitude 94.4 West. Harold is moving toward the west-northwest near 18 mph (30 km/h). This general motion is expected to continue today and tonight, and the system is forecast to move inland over south Texas by midday today. Reports from an Air Force Hurricane Hunter aircraft indicate that the maximum sustained winds have increased to near 45 mph (75 km/h) with higher gusts. Some additional strengthening is possible before Harold reaches the Texas coast. The minimum central pressure reported by the Hurricane Hunters is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Harold can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC and on the web at hurricanes.gov/text/MIATCDAT4.shtml. RAINFALL: The system is expected to produce rainfall amounts of 3 to 5 inches, with isolated higher amounts of 7 inches, across South Texas through early Wednesday. Scattered instances of flash flooding will be possible. Across Mexico, rainfall amounts of 4 to 6 inches, with local amounts of 10 inches, are expected across portions of northern Coahuila and northern Nuevo Leon today and Wednesday. Scattered instances of flash flooding are expected. WIND: Tropical storm conditions are expected in the warning area and are possible in the watch area beginning early today. STORM SURGE: The combination of a 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... Mouth of Rio Grande to Sargent, including Baffin Bay, Corpus Christi Bay and Matagorda Bay...1 to 3 ft The deepest water will occur along the immediate coast near and to the north of the landfall location, 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. TORNADOES: A couple of tornadoes are possible across south Texas from early today into the afternoon. SURF: Large swells will affect portions of southern Texas through Tuesday. 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 AM CDT. $$ Forecaster Pasch |
