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Potential Tropical Cyclone Three Public Advisory Number 3
2021-06-18 11:01:49| National Hurricane Center (Atlantic)
Issued at 400 AM CDT Fri Jun 18 2021 000 WTNT33 KNHC 180901 CCA TCPAT3 BULLETIN Potential Tropical Cyclone Three Advisory Number 3...Corrected NWS National Hurricane Center Miami FL AL032021 400 AM CDT Fri Jun 18 2021 Corrected to add states to storm surge communication points ...POTENTIAL TROPICAL CYCLONE THREE EXPECTED TO BRING HEAVY RAINFALL AND FLOODING TO THE NORTHERN GULF COAST STARTING LATER TODAY... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...25.2N 91.5W ABOUT 310 MI...500 KM S OF MORGAN CITY LOUISIANA ABOUT 435 MI...695 KM SSW OF MOBILE ALABAMA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning has been extended eastward for the Florida Panhandle from the Alabama/Florida border to the Okaloosa/Walton County line. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Intracoastal City Louisiana to the Okaloosa/Walton County line. * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 12 to 24 hours. Interests elsewhere along the northern Gulf Coast 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 400 AM CDT (0900 UTC), the poorly defined disturbance was centered near latitude 25.2 North, longitude 91.5 West. The system is moving toward the north near 14 mph (22 km/h), and this general motion is expected for the next day or so. On the forecast track, the system will approach the north-central Gulf Coast tonight or early Saturday. A slow northeastward motion across the southeastern United States is likely after landfall through the weekend. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Some strengthening is forecast, and a subtropical or tropical storm is likely to form over the west-central or northwestern Gulf of Mexico later today. * Formation chance through 48 hours...high...90 percent. * Formation chance through 5 days...high...90 percent. The estimated minimum central pressure is 1007 mb (29.74 inches), based on observations from NOAA buoy 42001. HAZARDS AFFECTING LAND ---------------------- Key messages for Potential Tropical Cyclone Three can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC, and on the web at www.huricanes.gov/graphics_at3.shtml?key_messages. RAINFALL: Rainfall totals of 4 to 8 inches with isolated maximum amounts of 12 inches are expected across portions of the Central Gulf Coast beginning today. Considerable flash, urban and small stream flooding impacts as well as new and renewed minor to isolated moderate river flooding are likely. As the system continues to lift northeast through the weekend, anticipate heavy rain to expand across southeastern Mississippi, southern and central Alabama, and central Georgia resulting in rainfall totals of 3 to 5 inches with isolated maximum amounts of 7 inches. Flash, urban, small stream and isolated minor river flooding impacts are possible. The potential tropical cyclone is expected to produce total rainfall of 3 to 6 inches with isolated amounts of 8 inches across the Yucatan Peninsula of Mexico. 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... Intracoastal City, LA to Okaloosa/Walton County Line, FL...2-3 ft Vermilion Bay, Lake Borgne and Mobile Bay ...2-3 ft Lake Pontchartrain and Lake Maurepas...1-2 ft Okaloosa/Walton County Line, FL to Panama City, FL... 1-2 ft Cameron, LA to Intracoastal City, LA...1-2 ft 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: Tropical storm conditions are expected to first reach the coast within the warning area later today, making outside preparations difficult or dangerous. TORNADOES: The threat for a tornado or two will begin this afternoon across coastal Louisiana, then spread overnight into Saturday across southern portions of Louisiana, Mississippi, and Alabama, to the western Florida Panhandle. NEXT ADVISORY ------------- Next intermediate advisory at 700 AM CDT. Next complete advisory at 1000 AM CDT. $$ Forecaster Blake
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Tropical Depression Four-E Graphics
2021-06-18 11:00:59| National Hurricane Center (East Pacific)
5-Day Uncertainty Track last updated Fri, 18 Jun 2021 09:00:59 GMT Wind Speed Probabilities last updated Fri, 18 Jun 2021 09:00:59 GMT
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Tropical Depression Four-E Forecast Discussion Number 1
2021-06-18 10:59:45| National Hurricane Center (East Pacific)
Issued at 400 AM CDT Fri Jun 18 2021 000 WTPZ44 KNHC 180859 TCDEP4 Tropical Depression Four-E Discussion Number 1 NWS National Hurricane Center Miami FL EP042021 400 AM CDT Fri Jun 18 2021 Over the past 12 h convection has blossomed and has become better organized over the broad low we have been monitoring a couple hundred miles to the south of Acapulco, Mexico. Overnight scatterometer-derived winds indicated that the system has acquired a closed circulation with max winds in the northeast quadrant of 30 kt. The most recent 06z Dvorak satellite estimates were T1.5/25 kt from TAFB and T2.0/30 kt from SAB. Since that time, deep cold convection has continued to increase near the estimated center with improved banding both the north and southwest quadrants. Due to this continued improvement in satellite imagery, this system is being upgraded to a 30-kt tropical depression this advisory. Environmental conditions appear to be favorable for additional intensification over the next 24-36 h as the storm reaches the Mexican coastline with high mid-level relative humidity, only light to moderate vertical wind shear, and very warm sea-surface temperatures between 29 to 30 C. Thus the latest NHC forecast indicates at least steady intensification, and TD4-E could become a strong tropical storm as it approaches the Mexican coastline. The NHC intensity forecast is in good agreement with the HFIP corrected consensus (HCCA) guidance. The estimated current motion of this depression is at 285/7 kt. Currently the system is being steered by a narrow mid-level ridge north of Mexico. However, this ridge is forecast to weaken and allow the storm to gain latitude over the next 24-36 h. The latest NHC forecast takes the depression to the coast of Mexico by late Saturday. This forecast is in fairly good agreement with the latest guidance and lies closest to the most recent ECMWF run, though spread remains between models that keep the system just off the Mexican coast like the UKMET versus the HWRF and GFS models which take the storm further east and inland over Mexico sooner. Given this track forecast, the government of Mexico has issued a tropical storm watch for the coast of Mexico from Cabo Corrientes southward to Lazaro Cardenas. FORECAST POSITIONS AND MAX WINDS INIT 18/0900Z 14.4N 101.6W 30 KT 35 MPH 12H 18/1800Z 14.8N 102.5W 35 KT 40 MPH 24H 19/0600Z 15.7N 103.5W 45 KT 50 MPH 36H 19/1800Z 17.5N 104.5W 55 KT 65 MPH 48H 20/0600Z 20.1N 105.2W 45 KT 50 MPH...INLAND 60H 20/1800Z 23.1N 105.9W 35 KT 40 MPH...INLAND 72H 21/0600Z 25.4N 106.5W 25 KT 30 MPH...POST-TROP/INLAND 96H 22/0600Z...DISSIPATED $$ Forecaster Papin/Blake
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Summary for Tropical Depression Four-E (EP4/EP042021)
2021-06-18 10:59:15| National Hurricane Center (East Pacific)
...A NEW TROPICAL DEPRESSION FORMS OFF THE COAST OF MEXICO... ...TROPICAL STORM WATCHES ISSUED FOR THE MEXICAN COAST... As of 4:00 AM CDT Fri Jun 18 the center of Four-E was located near 14.4, -101.6 with movement WNW at 8 mph. The minimum central pressure was 1005 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Four-E Public Advisory Number 1
2021-06-18 10:59:15| National Hurricane Center (East Pacific)
Issued at 400 AM CDT Fri Jun 18 2021 000 WTPZ34 KNHC 180859 TCPEP4 BULLETIN Tropical Depression Four-E Advisory Number 1 NWS National Hurricane Center Miami FL EP042021 400 AM CDT Fri Jun 18 2021 ...A NEW TROPICAL DEPRESSION FORMS OFF THE COAST OF MEXICO... ...TROPICAL STORM WATCHES ISSUED FOR THE MEXICAN COAST... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...14.4N 101.6W ABOUT 365 MI...585 KM SSE OF MANZANILLO MEXICO ABOUT 250 MI...405 KM S OF LAZARO CARDENAS MEXICO MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has issued a tropical storm watch from Cabo Corrientes southward to Lazaro Cardenas. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... *Cabo Corrientes to Lazaro Cardenas A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 400 AM CDT (0900 UTC), the center of Tropical Depression Four-E was located near latitude 14.4 North, longitude 101.6 West. The depression is moving toward the west-northwest near 8 mph (13 km/h), and this forward motion is expected to continue with a turn to the northwest and north-northwest over the next 24 h. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Strengthening is forecast over the next 36 h and the depression is forecast to become a tropical storm later today. The estimated minimum central pressure is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are possible within the watch area by late Saturday. RAINFALL: Tropical Depression Four-E will produce heavy rains over coastal sections of the Mexican states of Oaxaca, Guerrero, Michoacan, Colima, Jalisco, and Nayarit during the next few days, with rainfall totals of 5 to 10 inches expected with isolated maximum amounts of 15 inches possible. As a result, life-threatening flash flooding and mudslides may occur. SURF: Swells generated by the depression will affect portions of the southwest coast of Mexico 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. NEXT ADVISORY ------------- Next complete advisory at 1000 AM CDT. $$ Forecaster Papin/Blake
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