Issued at 100 PM CDT Wed Jul 22 2026
064 WTNT32 KNHC 221736 TCPAT2 BULLETIN Tropical Storm Bertha Intermediate Advisory Number 13A NWS National Hurricane Center Miami FL AL022026 100 PM CDT Wed Jul 22 2026 ...CENTER OF BERTHA APPROACHING THE COAST OF SOUTHEASTERN LOUISIANA... ...TROPICAL STORM CONDITIONS CONTINUE TO SPREAD WESTWARD WITHIN THE WARNING AREA... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...29.9N 89.1W ABOUT 35 MI...60 KM SSW OF BILOXI MISSISSIPPI ABOUT 60 MI...95 KM E OF NEW ORLEANS LOUISIANA MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WNW OR 295 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning has been discontinued east of the Alabama/Florida border. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Alabama/Florida border to Morgan City, Louisiana * Metropolitan New Orleans and Lake Pontchartrain A Tropical Storm Watch is in effect for... * West of Morgan City, Louisiana, to Sargent, Texas * Lake Maurepas A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 24 to 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within the next 12 to 36 hours. 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 PM CDT (1800 UTC), the center of Tropical Storm Bertha was located near latitude 29.9 North, longitude 89.1 West. Bertha is moving toward the west-northwest near 7 mph (11 km/h). A westward motion with an increase in forward speed is expected to resume later today and continue through Friday. On the forecast track, the center of Bertha will move near or along the Louisiana and upper Texas coasts through Thursday, and then move farther inland into Texas on Friday. Data from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds have decreased to near 45 mph (75 km/h) with higher gusts. Additional weakening is forecast during the next couple of days, but Bertha could maintain tropical storm intensity through late Thursday. Tropical-storm-force winds extend outward up to 105 miles (165 km) from the center. Dauphin Island, Alabama, recently reported a sustained wind of 36 mph (58 km/h) and a gust to 41 mph (66 km/h). Data from the reconnaissance aircraft indicate that the minimum central pressure is 1000 mb (29.53 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Tropical Storm Bertha can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2 and WMO header WTNT42 KNHC. WIND: Tropical storm conditions will continue spreading across portions of the northern Gulf Coast within the warning area today. Tropical storm conditions are possible within the watch area in Louisiana by tonight and along the upper Texas coast by Thursday or Thursday night. STORM SURGE: The combination of storm surge and the tide will cause normally dry areas near the immediate 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... Alabama/Florida border to Port Bolivar, TX...1-3 ft Lake Pontchartrain...1-3 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. For a complete depiction of areas at risk of storm surge inundation, please see the National Weather Service Peak Storm Surge Graphic, available at hurricanes.gov/graphics_at2.shtml?peakSurge. RAINFALL: Bertha is expected to produce total rainfall amounts of 1 to 4 inches with isolated higher totals of 6 inches through Friday along the central to western Gulf Coast from Northwest Florida to southern Texas. This rainfall may produce isolated flash flooding, especially in urban areas. For a complete depiction of forecast rainfall associated with Bertha, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_at2.shtml?rainqpf and the Flash Flood Risk graphic at hurricanes.gov/graphics_at2.shtml?ero. SURF: Swells generated by Bertha will continue spreading westward along the northern Gulf Coast during the next few days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. A depiction of rip current risk for the United States can be found at: hurricanes.gov/graphics_at2.shtml?ripCurrents NEXT ADVISORY ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Berg
