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Tropical Depression Hanna Public Advisory Number 17
2020-07-27 04:48:05| National Hurricane Center (Atlantic)
The NHC has issued its final advisory on this system. Public Advisories from the Weather Prediction Center will provide updates as long as the system remains a flood threat. Issued at 1000 PM CDT Sun Jul 26 2020
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Tropical Depression Hanna Graphics
2020-07-26 22:35:09| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Sun, 26 Jul 2020 20:35:09 GMT Wind Speed Probabilities last updated Sun, 26 Jul 2020 20:35:09 GMT
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Tropical Depression Hanna Forecast Discussion Number 16
2020-07-26 22:34:20| National Hurricane Center (Atlantic)
Issued at 400 PM CDT Sun Jul 26 2020 000 WTNT43 KNHC 262034 TCDAT3 Tropical Depression Hanna Discussion Number 16 NWS National Hurricane Center Miami FL AL082020 400 PM CDT Sun Jul 26 2020 Surface observations along with radar and satellite imagery show that Hanna continues to weaken as it moves farther inland. There have been no recent observations of sustained tropical-storm-force winds, and Doppler velocities have continued to decrease. Based on these trends, the initial wind speed has been reduced to 30 kt. Hanna should continue to spin down while it moves over the high terrain of northeastern Mexico. The system is forecast to become a remnant low in 12-18 hours, and should dissipate over the mountains of Mexico by late Monday, if not sooner. Hanna is moving west-southwestward or 245/8 kt. The cyclone should continue on this general heading and speed until dissipation occurs. The updated NHC track forecast is again similar to the previous advisory and is close to the dynamical model consensus. This is the last NHC advisory on Hanna. Future information on this system can be found in Public Advisories issued by the Weather Prediction Center beginning at 10 PM CDT, under AWIPS header TCPAT3, WMO header WTNT33 KWNH, and on the web at http://www.wpc.ncep.noaa.gov. Key Messages 1. Heavy rainfall from Hanna has already produced numerous reports of flash flooding across south Texas. Additional heavy rainfall will continue to result in life-threatening flash flooding over south Texas and northern Mexico, and isolated minor river flooding in south Texas. FORECAST POSITIONS AND MAX WINDS INIT 26/2100Z 25.6N 100.6W 30 KT 35 MPH...INLAND 12H 27/0600Z 25.2N 101.6W 25 KT 30 MPH...INLAND 24H 27/1800Z 25.0N 102.6W 20 KT 25 MPH...POST-TROP/INLAND 36H 28/0600Z...DISSIPATED $$ Forecaster Brown
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Tropical Depression Hanna Wind Speed Probabilities Number 16
2020-07-26 22:33:50| National Hurricane Center (Atlantic)
Issued at 2100 UTC SUN JUL 26 2020 000 FONT13 KNHC 262033 PWSAT3 TROPICAL DEPRESSION HANNA WIND SPEED PROBABILITIES NUMBER 16 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082020 2100 UTC SUN JUL 26 2020 AT 2100Z THE CENTER OF TROPICAL DEPRESSION HANNA WAS LOCATED NEAR LATITUDE 25.6 NORTH...LONGITUDE 100.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 30 KTS...35 MPH...55 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 18Z 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 18Z SUN 06Z MON 18Z MON 06Z TUE 18Z TUE 18Z WED 18Z THU PERIODS TO TO TO TO TO TO TO 06Z MON 18Z MON 06Z TUE 18Z TUE 18Z WED 18Z THU 18Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER BROWN
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Summary for Tropical Depression Hanna (AT3/AL082020)
2020-07-26 22:33:49| National Hurricane Center (Atlantic)
...HANNA WEAKENS TO A TROPICAL DEPRESSION OVER NORTHEASTERN MEXICO... ...HEAVY RAIN AND DANGEROUS FLASH FLOODING CONTINUE OVER FAR SOUTHEAST TEXAS AND NORTHEAST MEXICO... As of 4:00 PM CDT Sun Jul 26 the center of Hanna was located near 25.6, -100.6 with movement WSW at 9 mph. The minimum central pressure was 1002 mb with maximum sustained winds of about 35 mph.
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