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Tropical Storm Pamela Forecast Discussion Number 14
2021-10-13 16:52:32| National Hurricane Center (East Pacific)
Issued at 900 AM MDT Wed Oct 13 2021 000 WTPZ41 KNHC 131452 TCDEP1 Tropical Storm Pamela Discussion Number 14 NWS National Hurricane Center Miami FL EP162021 900 AM MDT Wed Oct 13 2021 Pamela is estimated to have made landfall around 1200 UTC close to Estacion Dimas in the Mexican state of Sinaloa as a 65-kt hurricane. To the southeast of the landfall location, observations from the Mazatlan Airport indicated wind gusts to 40 kt had occurred. There was also a storm chaser located at Marmor de Salcido, Mexico, who measured a minimum pressure of 990.8 mb with southeasterly winds to 20 kt at 1208 UTC. Thus, based on these data, the estimated landfall location and an estimated minimum central pressure of 987 mb appears reasonable. Vigorous deep convection is still occuring around Pamela's estimated center as it moves farther inland. However, since the center has been onshore for a few hours now, the wind field is likely starting to spin down and maximum sustained winds are estimated to have decreased to 55 kt. The tropical cyclone has been accelerating to the northeast this morning, with the latest estimated motion at 045/20 kt. Further acceleration to the northeast is expected as the system remains embedded in deep-layer southwesterly flow between a long-wave trough over the western United States and a mid-level ridge centered over the Gulf of Mexico. The track guidance is in good agreement on this solution with the storm losing its identity after the 12-h forecast period and the latest track forecast remains close to the model consensus solutions. Pamela's circulation is not forecast to survive the passage over the high, rugged terrain of Central Mexico, but its remnants are expected to contain a large slug of deep-layer moisture that will be advected northeastward into the south-central United States. Additional heavy rainfall and flooding impacts are anticipated later today and on Thursday for these areas. Key Messages: 1. Although Pamela is moving inland into west-central Mexico this morning, a Tropical Storm warning remains in effect from Bahia Tempehuaya to Escuinapa where tropical storm conditions are still expected for the next several hours. Residents in this area should follow any advice given by local officials. 2. Heavy rains associated with Pamela will continue across the Mexican States of Sinaloa, western Durgano, and northern Nayarit through today. This will pose a threat of significant and life-threatening flash flooding and mudslides. 3. Heavy rains associated with the remnants of Pamela are expected across portions of central Texas and southeastern Oklahoma today into Thursday. This may result in considerable flash and urban flooding impacts. FORECAST POSITIONS AND MAX WINDS INIT 13/1500Z 24.4N 106.0W 55 KT 65 MPH...INLAND 12H 14/0000Z 26.6N 102.7W 30 KT 35 MPH...INLAND 24H 14/1200Z...DISSIPATED INLAND $$ Forecaster Papin
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Tropical Storm Pamela Wind Speed Probabilities Number 14
2021-10-13 16:48:02| National Hurricane Center (East Pacific)
Issued at 1500 UTC WED OCT 13 2021 784 FOPZ11 KNHC 131447 PWSEP1 TROPICAL STORM PAMELA WIND SPEED PROBABILITIES NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL EP162021 1500 UTC WED OCT 13 2021 AT 1500Z THE CENTER OF TROPICAL STORM PAMELA WAS LOCATED NEAR LATITUDE 24.4 NORTH...LONGITUDE 106.0 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 55 KTS...65 MPH...100 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 12Z WED AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 12Z WED 00Z THU 12Z THU 00Z FRI 12Z FRI 12Z SAT 12Z SUN PERIODS TO TO TO TO TO TO TO 00Z THU 12Z THU 00Z FRI 12Z FRI 12Z SAT 12Z SUN 12Z MON FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT MAZATLAN 34 99 X(99) X(99) X(99) X(99) X(99) X(99) MAZATLAN 50 99 X(99) X(99) X(99) X(99) X(99) X(99) $$ FORECASTER PAPIN
Summary for Tropical Storm Pamela (EP1/EP162021)
2021-10-13 16:47:31| National Hurricane Center (East Pacific)
...TROPICAL STORM PAMELA MOVING INLAND OVER WEST-CENTRAL MEXICO BRINGING STRONG GUSTY WINDS AND HEAVY RAINS... As of 9:00 AM MDT Wed Oct 13 the center of Pamela was located near 24.4, -106.0 with movement NE at 23 mph. The minimum central pressure was 992 mb with maximum sustained winds of about 65 mph.
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Tropical Storm Pamela Public Advisory Number 14
2021-10-13 16:47:31| National Hurricane Center (East Pacific)
Issued at 900 AM MDT Wed Oct 13 2021 000 WTPZ31 KNHC 131447 TCPEP1 BULLETIN Tropical Storm Pamela Advisory Number 14 NWS National Hurricane Center Miami FL EP162021 900 AM MDT Wed Oct 13 2021 ...TROPICAL STORM PAMELA MOVING INLAND OVER WEST-CENTRAL MEXICO BRINGING STRONG GUSTY WINDS AND HEAVY RAINS... SUMMARY OF 900 AM MDT...1500 UTC...INFORMATION ---------------------------------------------- LOCATION...24.4N 106.0W ABOUT 85 MI...140 KM NNE OF MAZATLAN MEXICO MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...NE OR 45 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has changed the Hurricane Warning to a Tropical Storm Warning from Bahia Tempehuaya to Escuinapa. All other Tropical Storm Warnings have been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Bahia Tempehuaya to Escuinapa A Tropical Storm Warning means that tropical storm conditions are occurring within the warning area now. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 900 AM MDT (1500 UTC), the center of Tropical Storm Pamela was located near latitude 24.4 North, longitude 106.0 West. Pamela is accelerating toward the northeast near 23 mph (37 km/h) and this motion is expected to continue at a faster speed prior to dissipation. Maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Additional rapid weakening is forecast as the center moves farther inland. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure is 992 mb (29.30 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Pamela can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP1 and WMO header WTPZ41 KNHC, and on the web at hurricanes.gov/graphics_ep1.shtml?key_messages. STORM SURGE: Storm surge is expected to produce significant coastal flooding in areas of onshore winds within the warning area. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Tropical Storm conditions are occuring within the Tropical Storm Warning area for the next few hours but should end later this afternoon. RAINFALL: Through Thursday, Pamela or its remnants are expected to produce the following rainfall amounts: Across the Mexican States of Sinaloa, western Durango, and northern Nayarit...4 to 8 inches with isolated maximum totals of 12 inches. This rainfall may trigger significant and life-threatening flash flooding and mudslides. Across portions of central Texas and southeastern Oklahoma...3 to 6 inches with isolated maximum totals of 8 inches. This may result in considerable flash and urban flooding impacts. SURF: Swells generated by Pamela will continue to affect portions of the southern Baja California peninsula, as well as southwestern and west-central mainland Mexico through today. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 1200 PM MDT. Next complete advisory at 300 PM MDT. $$ Forecaster Papin
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Tropical Storm Pamela Forecast Advisory Number 14
2021-10-13 16:46:29| National Hurricane Center (East Pacific)
Issued at 1500 UTC WED OCT 13 2021 000 WTPZ21 KNHC 131446 TCMEP1 TROPICAL STORM PAMELA FORECAST/ADVISORY NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL EP162021 1500 UTC WED OCT 13 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE GOVERNMENT OF MEXICO HAS CHANGED THE HURRICANE WARNING TO A TROPICAL STORM WARNING FROM BAHIA TEMPEHUAYA TO ESCUINAPA. ALL OTHER TROPICAL STORM WARNINGS HAVE BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * BAHIA TEMPEHUAYA TO ESCUINAPA A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE OCCURRING WITHIN THE WARNING AREA NOW. TROPICAL STORM CENTER LOCATED NEAR 24.4N 106.0W AT 13/1500Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTHEAST OR 45 DEGREES AT 20 KT ESTIMATED MINIMUM CENTRAL PRESSURE 992 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 80 KT. 50 KT....... 0NE 50SE 0SW 0NW. 34 KT....... 70NE 120SE 70SW 40NW. 12 FT SEAS.. 0NE 180SE 210SW 120NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 24.4N 106.0W AT 13/1500Z AT 13/1200Z CENTER WAS LOCATED NEAR 23.7N 106.8W FORECAST VALID 14/0000Z 26.6N 102.7W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 14/1200Z...DISSIPATED INLAND REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 24.4N 106.0W INTERMEDIATE PUBLIC ADVISORY...WTNT31 KNHC/MIATCPEP1...AT 13/1800Z NEXT ADVISORY AT 13/2100Z $$ FORECASTER PAPIN
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