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Tropical Storm Hanna Graphics
2020-07-26 16:50:44| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Sun, 26 Jul 2020 14:50:44 GMT Wind Speed Probabilities last updated Sun, 26 Jul 2020 14:50:44 GMT
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hanna
Tropical Storm Hanna Forecast Discussion Number 15
2020-07-26 16:45:44| National Hurricane Center (Atlantic)
Issued at 1000 AM CDT Sun Jul 26 2020 058 WTNT43 KNHC 261445 TCDAT3 Tropical Storm Hanna Discussion Number 15 NWS National Hurricane Center Miami FL AL082020 1000 AM CDT Sun Jul 26 2020 Surface observations and WSR-88D radar data from Brownsville, Texas, indicate that Hanna continues to weaken as it moves farther inland. The radar shows a couple of fairly well-defined bands of convection over the eastern semicircle and tropical-storm-force wind gusts have been reported at observing sites along the U.S./Mexico border within the past couple of hours. The initial intensity has been reduced to 40 kt, and is based primarily on recent observations and Doppler radar velocities. Hanna should continue to weaken quickly during the next 12-24 hours as it moves inland over Mexico. Hanna is forecast to become a tropical depression later today and dissipate over the mountainous terrain of Mexico by Monday night. Hanna is moving west-southwestward or 250/8 kt. The system is forecast to continue moving west-southwestward around the southern portion of a mid-level ridge over the central United States. The new NHC track forecast is similar to the previous advisory and lies near the various consensus aids. Key Messages 1. Tropical storm conditions are expected to persist into this afternoon near and to the east of the center of Hanna. 2. Heavy rainfall from Hanna has already produced numerous reports of flash flooding across south Texas. Additional heavy rainfall will continue to cause life-threatening flash flooding over south Texas and northern Mexico, and isolated minor to moderate river flooding in south Texas. 3. Storm surge along the Texas coast should continue to diminish today. FORECAST POSITIONS AND MAX WINDS INIT 26/1500Z 26.1N 99.7W 40 KT 45 MPH 12H 27/0000Z 25.5N 100.6W 30 KT 35 MPH...INLAND 24H 27/1200Z 25.0N 101.9W 25 KT 30 MPH...INLAND 36H 28/0000Z 24.9N 102.9W 20 KT 25 MPH...POST-TROP/INLAND 48H 28/1200Z...DISSIPATED $$ Forecaster Brown
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Tropical Storm Hanna Wind Speed Probabilities Number 15
2020-07-26 16:45:14| National Hurricane Center (Atlantic)
Issued at 1500 UTC SUN JUL 26 2020 454 FONT13 KNHC 261445 PWSAT3 TROPICAL STORM HANNA WIND SPEED PROBABILITIES NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082020 1500 UTC SUN JUL 26 2020 AT 1500Z THE CENTER OF TROPICAL STORM HANNA WAS LOCATED NEAR LATITUDE 26.1 NORTH...LONGITUDE 99.7 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 40 KTS...45 MPH...75 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 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 SUN 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 SUN 00Z MON 12Z MON 00Z TUE 12Z TUE 12Z WED 12Z THU PERIODS TO TO TO TO TO TO TO 00Z MON 12Z MON 00Z TUE 12Z TUE 12Z WED 12Z THU 12Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT MCALLEN TX 34 99 X(99) X(99) X(99) X(99) X(99) X(99) $$ FORECASTER BROWN
Summary for Tropical Storm Hanna (AT3/AL082020)
2020-07-26 16:44:44| National Hurricane Center (Atlantic)
...CENTER OF HANNA CONTINUES TO MOVE INLAND OVER NORTHEASTERN MEXICO... ...HEAVY RAIN AND DANGEROUS FLASH FLOODING CONTINUES OVER FAR SOUTHEAST TEXAS AND NORTHEAST MEXICO... As of 10:00 AM CDT Sun Jul 26 the center of Hanna was located near 26.1, -99.7 with movement WSW at 9 mph. The minimum central pressure was 995 mb with maximum sustained winds of about 45 mph.
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Tropical Storm Hanna Forecast Advisory Number 15
2020-07-26 16:44:44| National Hurricane Center (Atlantic)
Issued at 1500 UTC SUN JUL 26 2020 705 WTNT23 KNHC 261444 TCMAT3 TROPICAL STORM HANNA FORECAST/ADVISORY NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082020 1500 UTC SUN JUL 26 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE TROPICAL STORM WARNING ALONG THE COAST OF TEXAS SOUTH OF BAFFIN BAY HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * BARRA EL MEZQUITAL MEXICO TO THE MOUTH OF THE RIO GRANDE INTERESTS IN NORTHEASTERN MEXICO SHOULD MONITOR THE PROGRESS OF HANNA. TROPICAL STORM CENTER LOCATED NEAR 26.1N 99.7W AT 26/1500Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE WEST-SOUTHWEST OR 250 DEGREES AT 8 KT ESTIMATED MINIMUM CENTRAL PRESSURE 995 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 60NE 90SE 30SW 30NW. 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 26.1N 99.7W AT 26/1500Z AT 26/1200Z CENTER WAS LOCATED NEAR 26.2N 99.2W FORECAST VALID 27/0000Z 25.5N 100.6W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 27/1200Z 25.0N 101.9W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 28/0000Z 24.9N 102.9W...POST-TROP/INLAND MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 28/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 26.1N 99.7W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 26/1800Z NEXT ADVISORY AT 26/2100Z $$ FORECASTER BROWN
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